FI20226034A1 - A closure for a flexible package, a flexible package with a closure, and a method for manufacturing a package comprising a closure - Google Patents

Abstract

The invention relates to a closure (900) for closing the open side (921) of a flexible package (920). The shutter (900) comprises a material blank with two folding points (901, 902), an attachment surface (905), a resealable shutter surface (904) and a non-stick surface (903). Glue (108) is arranged on the attachment surface (905) for attaching the flexible package to the first outer wall. In the closed position of the closure (900), the resealable closure surface (904) is arranged to be releasably attached over the open side (921) of the flexible packaging (920) to the second outer wall of the flexible packaging (920) and in the open position to the non-stick surface of the closure (900) ( 903). The invention is also directed to a flexible package (920), which comprises the aforementioned closure (900) or a closure (900) that is an extension of the first wall without the closure mounting surface (905). The invention is also directed to the manufacturing method of the flexible package (920) with a closure (900).

Description

A closure for a flexible package, a flexible package with a closure and for the manufacturing method of a package comprising a closure

Object of the invention

The invention is directed to the closure of the flexible package, which can be used to close the flexible package or close it again after opening. The invention is also directed to a flexible package with a closure and to a manufacturing method of a flexible package including a closure.

Background of the invention

Paper and fiber material flexible packages such as bags are traditionally sealed in an adhesive area, such as with glue, ultrasonic sealing or heat sealing. When opening the package, the different parts of the package are separated from each other mechanically, for example by pulling the parts apart in a direction transverse to the seam, or in the case of a flap, by tearing off the flap from the side of the package where it is seamed. Aluminum foil packages, such as nut bags, can be opened, for example, by tearing off a material area from the top of the bag from the entire width of the top of the bag. Plastic packages, such as candy bags, can be opened similarly to foil bags by tearing the material area from the top of the bag from the entire width of the top of the bag or from the corner of the bag, or by pulling the front and back of the bag in opposite directions, whereby the seam formed by the glue or other adhesive area of the top of the bag opens by detaching from at least one — from the surface.

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N The problem with many traditional flexible packages is that they cannot be closed after opening without a separate closing device. However, closing is 2 advantageous for many products contained in the package, such as for example

I 30 — to ensure a better shelf life of foodstuffs, but also because 3 the material stored in the already opened package does not accidentally spill out of the package and

S clutter the environment, e.g. handbag or backpack. Some foil bags or plastic pack-

N seasons include a printable resealable closure structure, e.g.

The so-called zip, i.e. Minigrip technology-based closing structure of the package — in the upper part, i.e. double grooves on the first inner wall of the package and a groove on the second inner wall. This structure is closed by pressing a single groove between a pair of grooves. However, the material of this solution is usually ungrounded plastic, and it is not affordable or suitable for all types of materials, e.g. paper bags, due to its low tensile strength. There are also closures based on zip or Minigrip technology made of biodegradable plastic, but this material also interferes with the recycling of fibers. These closures can of course be removed from the recyclable packaging by tearing or cutting before recycling, but this causes additional work. Flexible packages can also include a resealable strip of tape, a seal or a slime strip or lines, which are attached to one of the inner walls of the package or in a flapped bag structure between the outer wall of the package and the flap attached to it.

Tape — and adhesive strip constructions in resealing solutions can be a problem because, since the adhesive structure is open when the bag is open, i.e. unprotected, it can collect material either from the environment or inside the bag that prevents or hinders the reattachment of the tape or adhesive strip.

Brief summary of the invention

The purpose of the present invention is to create and introduce a new type of closure for flexible packaging, flexible flexible packaging with closure and a method for producing flexible flexible packaging with closure. The invention is characterized by what is said in the independent claims and advantageous embodiments of the invention are in the non-independent claims.

The invention is directed to the closure of the flexible package for closing the open side of the flexible package. The closure comprises a material blank which comprises at least two

N folding points, attachment surface, resealable shutter surface and non-stick

N of the surface on which glue is arranged on said attachment surface, with which the closure is - intended to be attached to the first outer wall of the flexible package, and 2 which attachment surface is between the first side of the closure and the first folding point 30. The non-stick surface of the shutter is either between the first and second folding point 3, in which case the shutter surface to be closed again is at the second folding point

Between S and one side of the closure, or the non-stick surface of the closure is the other

A between the folding point and the other side of the shutter, in which case the surface of the shutter to be closed again is between the first and second folding point. Resealable — the closure surface, on which glue is provided, is arranged in the closed position of the closure to be releasably attached over the open side of the flexible package to the flexible

to the other outer wall of the package and, in the open position, to the non-stick surface of the closure.

According to one embodiment, the non-stick surface is an uncoated material — blank material. According to one embodiment, the non-stick surface is silicone or comprises silicone. According to one embodiment, the edge area of the other side of the resealable shutter surface does not contain glue and functions as a flap.

According to one embodiment, the edge area on one side of the resealable shutter surface is partially folded and glued from the direction of the other side — twice to form a flap. According to one embodiment, a strip of material is glued on top of the edge area of the other side of the resealable shutter surface to form a flap. According to one embodiment, the material of the material blank is recyclable paper fiber. According to one embodiment, the resealable shutter surface and/or the non-stick surface is stiffened — with a separate layer of material. According to one embodiment, the material of the material blank is compostable or biodegradable fiber material, compostable film material, plastic, laminate or aluminum foil. According to one embodiment, the shutter comprises a processing projection arranged on the opposite side of the shutter from the resealable shutter surface, again — at the junction of the resealable shutter surface and the non-stick surface. According to one embodiment, the adhesives of the shutter attachment surface and the shutter surface to be resealed are the same glue.

The invention is also directed to a flexible package, which comprises the above-mentioned closure or a closure according to one of its embodiments, which is attached

N on the outer surface of the first wall of the flexible packaging, the fastening pin of the closure

N a teddy bear. Alternatively, the closure is an extension of the first wall without the closure - fixing surface, but comprises at least two folding points, a resealable 2 closure surface and a non-stick surface on which the said resealable

I 30 — glue is arranged on the closure surface, and each closure closes the flexible package when the 3 resealable closure surface is releasably attached over the open side of the flexible package 2 to the outer surface of the second wall of the flexible package and the flexible

A when the package is open, the closing surface to be resealed is against the closing

N men non-stick surface.

According to one embodiment, the material of the flexible package is recyclable paper fiber, compostable or biodegradable fiber material, compostable or biodegradable film material, plastic, laminate or aluminum foil. According to one embodiment, the material of the flexible package is fiber material and the opening side of which comprises a fiber tear stopper in connection with the seam that closes the open side. According to one embodiment, the closure is wider than the flexible package in the closed position, and each flexible package can be opened by detaching the edge parts that are wider than the flexible package of the closure. — The invention is further directed to the manufacturing method of flexible packaging with a closure. The method comprises at least the following steps: at least one piece of flexible material is arranged as the first wall and the second wall of the flexible package, the closure of the flexible package is arranged in the folded open position, the closure is attached to the first or second wall of the flexible package in such a way that the other side of the closure material is towards the opening side of the flexible package, the first side of the flexible package is attached wall and the second wall of the flexible package to each other by glue, ultrasonic sealing or heat sealing, and an adhesive area is arranged between the first wall and the second wall of the flexible package, which forms a seam that closes the opening side of the flexible package.

Description of drawings

The invention is explained in more detail in the following by referring to the attached drawings, in which

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N figure 1a shows a closure of a flexible package according to one embodiment - seen from the direction of the closure surface in which it comprises different surface materials, 0 x 30 — figure 1b shows a perspective view of the closure of the flexible package of figure 1a, 3 figure 1c shows the closure of figure 1a and the flexible package from the side direction

A as a foil cut pattern when the shutter is attached to the flex package but is not

N set to closed or open position;

Figure 1d shows a side cross-section of the package and closure of Figure 1c when the closure is in the closed position and closes the flexible package; Figure 1e shows a side cross-section of the package and closure of Figure 1c when the closure is in the open position and the flexible package is open; figure 2a shows a closure of a flexible package according to one embodiment as seen from the direction of the closure surface, — figure 2b shows the closure of the flexible package of figure 2a as a perspective view, figure 2c shows a side cross-section of the package and closure of figure 2a, when the closure is attached to the flexible package, but is not placed closed or to the open position; figure 2d shows a side cross-section of the package and closure of figure 2c, when the closure is in the closed position and closes the open side of the flexible package; — Figure 2e shows a side view of the package and closure of Figure 2c, when the closure is in the open position and the open side of the flexible package is open; figure 3a shows a package closure according to one embodiment in a cross-section from the side direction of the package and the closure, when the closure is attached to the flexible package and in the open position;

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Figure 3b shows a side cross-section of the package and closure of Figure 3a when the closure is in the closed position and closes the flexible package; 0

I 30 — figure 4a of a package closure according to one embodiment from the side direction of the package and a < closure, when the closure is attached to the flexible package and is

S in the open position; &

O

Figure 4b shows a side cross-section of the package and closure of Figure 4a when the closure is in the closed position and closes the flexible package;

figure 5a shows the flexible package closed with a closure according to one embodiment and seen from the direction of the opposite surface to that to which the closure is attached; — Fig. 5b shows the flexible package of Fig. 5a when the package is opened and the closure is in the open position; Figure 5c shows the flexible package of Figure 5a when the package is closed and the shutter is in the closed position; — figure 6 shows a paper packaging manufacturing method according to the invention as a flow diagram; Figure 7 shows a package closure according to one embodiment from the side of the package and the closure, when the closure is attached to the flexible package, Figure 8a shows a flexible package closure according to one embodiment as seen from the direction of the closure surface in which it comprises different surface materials, Figure 8b shows the flexible package closure of Figure 8a as a perspective view, Figure 8c Fig. 8a shows a side cross-sectional view of the closure and flexible package when the closure is attached to the flexible package but not set in the closed or open position; — figure 8d shows a side cross-section of the package and closure of figure 8c

N period when the shutter is in the closed position and closes the flexible package and it

N open page; 2, figure 8e shows a side cross-section of the package and closure of figure 8c

I 30 —when the shutter is in the open position and leaves the flexible package and its 3 open sides open; 2

N figure 9a shows a closure of a flexible package according to one embodiment

N seen from the direction of the closure surface, in which it comprises different surface materials, Figure 9b shows the closure of the flexible package of Figure 9a as a perspective view,

Fig. 9c shows a side cross-sectional view of the closure and flexible package of Fig. 9a when the closure is attached to the flexible package but not set in the closed or open position; figure 9d shows a side cross-section of the package of figure 9c and the closure of figures 9a, 9b, when the closure is in the closed position and closes the flexible package and its open side; — figure 9e shows a side cross-section of the package of figure 9c and the closure of figures 9a, 9b, when the closure is in the open position and leaves the flexible package and its open side open; figure 10a shows a processing projecting flexible package closure according to one embodiment, seen from the direction of the closure surface, in which it comprises different surface materials, figure 10b shows the flexible package closure of figure 10a, as seen from the end of the closure, figure 10c shows the closure of figures 10a, 10b and the side direction of the flexible package pin as a cross-sectional pattern when the closure is attached to the flex package but is not positioned in the closed or open position; — figure 10d shows the closure of figures 10a, 10b and the flexible package of figure 10c

N in cross-section from the side when the shutter is in the closed position and closing

N flexible packaging and its open side; 2, figure 10e shows the closure of figures 10a, 10b and the flexible packaging of figures 10c, 10d

I 30 from its front; a

Figure 11 shows a front view of a shutter according to one embodiment

O

N blank in flexible packaging;

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— figure 12a shows a flexible package closure according to one embodiment;

Fig. 12b shows the closure according to Fig. 12a attached to the flexible package; figure 13a shows the structure of a resealable flexible package according to one embodiment as a cross-sectional view from the side, figure 13b shows a cross-sectional view of the resealable flexible package of figure 13a as the openable side heat-sealed before opening the flexible package, — figure 13c shows a cross-sectional view of the resealable flexible package of figure 13b from the side, when the flexible package has been opened; and Fig. 13d shows a side cross-sectional view of the resealable flexible package of Fig. 13c when the flexible package has been resealed.

Detailed description of the invention

As already mentioned in the background of the invention chapter, flexible packages such as paper, plastic or aluminum foil packages and bags are traditionally sealed in an adhesive area, such as with glue, ultrasonic sealing or heat sealing. When opening the package, the different parts of the package, most commonly opposite walls, are separated from each other mechanically, for example by pulling the walls apart in a direction transverse to the seam, in which case the seam formed by the glue or other adhesive area at the top of the bag opens by detaching from at least — one of its surfaces, or alternatively the seam splits. Shoulder flex pack

In the case of N season, the package can be opened by removing the flap from the package

N from the wall it is welded to. In this application, wall refers to the wall or part of the wall delimiting the package. Some of the flexible packages, such as e.g. aluminum foil nut bags, can also be opened pre-

I 30 — as a mark by tearing a material area from the top of the package the entire width of the top 3 of the bag. Plastic packaging, such as candy bags, can be opened

S correspondingly, by tearing the material area from the top of the package over the entire top of the bag

N from the width of the part or by detaching the material area of the corner area of the package.

O

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The problem with many flexible packages is that they can no longer be closed after opening without a separate closing device, such as a plastic or metal clamp or clamp, or a closure that works by twisting or pressing parts together containing metal wire. However, closing the package that has already been opened is advantageous in order to ensure better preservation and hygiene of the products contained in the package, such as food packed in the package, but also because the products stay in the bag. The resealable flexible packaging also increases the reusability of the flexible packaging and would reduce the need to transfer the products of the packaging to another packaging after opening.

However, there are flap resealable flexible packages with an adhesive surface for example 15 mm from the top edge of the bag. One reason for the location is presumably that the fingers would not hit the adhesive surface when opening the bag. The weakness of such a solution is e.g. the fact that the bag does not close tightly with the flap, because the 15 mm gap remains in the corners after the flap is attached with Velcro. In addition, the adhesive surface often includes a separate pull-out strip from the adhesive surface, for example a paper or plastic strip to protect the sticker before the adhesive surface is put into use. After commissioning, the unprotected adhesive surface is also exposed to dirt when the package is open. — So there is a need for an affordable, dirt-free, easy-to-use and reliably closing and reclosing closure of the flexible package, i.e. a closing solution. The closure according to the invention is intended to close and re-close, Flexible packages (eng. flexible package), such as paper, plastic or aluminum foil packages and bags as well as flexible packages made of other flexible materials or other flexible packages to be closed with the closure according to the invention

Packages, packages and bags are also suitable. With a shutter according to the invention

There are therefore no material restrictions for N resealable flexible packaging, as the closure is suitable - for use in various fiber material, plastic and foil bags, 2 but also in some cases in rigid cardboard packaging. Shutter and spring

I 30 — several fiber materials still under development 3 or to be developed are probably also suitable as top bag materials. However, it should be noted that the shutter according to the invention is a particularly advantageous solution made from recyclable fiber materials.

In flexible packaging made from arials, i.e. mainly recyclable paper,

In N, and especially when the closure is made of the same material as the flexible packaging, because then the plastic closure does not interfere or prevent the recyclability of the flexible packaging with closure. In the light of current research, paper can be recycled several times, up to 10 times, which further emphasizes paper's advantageous position as a flexible packaging material. The situation is similar for cardboard, as cardboard, which is a biodegradable material, can be recycled many times, up to 25 times. On the other hand, food companies prefer or may prefer virgin fiber in packages that are in direct contact with food such as moist or fatty food, for example chocolate, for reasons of hygiene. In addition, it is good to note that recycling the material is cheaper than composting it. It is therefore very environmentally friendly and inexpensive to recycle the fiber of recyclable flexible fiber packaging for recycling and reuse instead of composting until the mechanical properties of the fibers deteriorate.

The shutter according to the invention comprises a material blank with at least two folding points. Between the first side of the closure and the first folding point, there is an attachment surface on which the first adhesive surface, e.g. hot glue, is applied, with which the closure is attached to the outer wall of the flexible package. If the adhesive surface is on the closure surface of the closure, i.e. the surface that faces the mouth opening of the closure when the closure is closed, then the first side is away from the open side of the bag, i.e. the mouth opening, and downwards. If the adhesive surface is on the opposite surface to the closing surface of the closure, then the first side is towards the mouth opening of the bag and upwards.

Between the first and second folding points, the closure comprises a non-stick surface. It can be, for example, silicone or any other material that is such that between the folding point and the other side of the closure there is a new

The shutter surface to be closed by N lee, on which a second adhesive surface has been applied, e.g. self-adhesive glue,

N which does not permanently stick when they are placed folded against each other in the open position. With the glue on the resealable closure surface, the closure is removably fixed 2 in the closed position over the open side of the flexible packaging

I 30 —to the outer wall opposite to the mounting surface for closing the flexible package 3. In other words, the shutter is said to be open, i.e. the folds-

S when the shutter surface is attached to a non-stick surface, i.e. so-called release pin

A is removable and the closure does not close the package. In this application, the term or-

The first point includes both the points from which the shutter is folded or from which it can be folded or intended to be folded when in use. When talking about flexible packaging and also cardboard packaging, only the term "packaging" can be used in connection with this application. It should be noted that in an alternative embodiment, the non-stick surface and the resealable shutter surface can change places. —Of the flexible packages that can be closed with the closure according to the invention, the paper packages are packages made of paper or combinations of paper and other materials, i.e., laminates. Paper weights are typically less than 250 g/m?, less than 180 g/m?, or less than 125 g/m?, such as 20-250 g/m?, 40-180 g/m?, or 60-125 g/m ?. The paper used in flexible packaging is cheaply recyclable, but it can also be compostable or biodegradable, the term recyclable paper flexible packaging, however, then only applies to flexible packaging made from recyclable paper. Although paper packaging is normally based on wood-based or other plant fibers, the material may also contain other fibers. The raw materials of recyclable paper flexible packaging material — are therefore wood-based or pulp-based fibers and other plant fibers. The raw materials of compostable or biodegradable flexible packaging material are also biodegradable synthetic fibers.

The laminate of a paper package can comprise two or more material layers, one of which is typically paper, i.e. the laminate can for example comprise one layer of paper and another layer of other material or e.g. three different layers, of which one layer comprises paper and the other two layers - other materials. The order of the laminate layers can be chosen according to the purpose of use. Typically, paper is in the laminate as the outermost layer. One or more layers of the laminate may comprise fiber materials.

N Paper or other wood- or pulp-based fibers can be used as fiber material

N core materials, such as wood fiber or nonwoven materials. However, preferably the non-recyclable fiber material used in the laminate is biodegradable 2 or compostable. One or more layers of the laminate may include others

I 30 — wood- or pulp-based materials other than fibrous materials, such as membrane materials. Cellophane and laminate can also be used as film material.

Plastics can be used as s roks. The plastic used in the laminate can be chosen

N from among polyethylene (PE), polypropylene (PP), polyethylene tere-

N talate (PET), bio-based and/or biodegradable plastics such as polycaprolactone (PLC), polyvinyl alcohol (PVOH), polylactide (PLA), and combinations thereof.

Advantageously, the paper-plastic laminate comprises paper and biodegradable plastic,

which guarantees the compostability of the packaging, especially preferably paper and polylactide (PLA). A biodegradable or compostable barrier material (so-called barrier material) made with water-based dispersion technology, which does not contain plastic, can be used as the layers of the laminate. If this barrier layer is in the innermost part of the laminate (as a layer remaining inside the package), it is preferably heat-sealable or ultrasonic-sealable. Paper packaging can also be made from a laminate, which comprises paper and heat-sealable or ultrasonic-sealable material. The package can also be made of a heat-sealable or ultrasonically-sealable paper-plastic laminate or a laminate that includes paper and a biodegradable or compostable barrier material (so-called barrier material) made with water-based dispersion technology, which does not contain plastic, or the paper package can be made of a heat-sealable or from an ultrasonically sealable, biodegradable paper-plastic laminate, such as a paper-polylactide (PLA) laminate. A heat-sealable or ultrasonic-sealable laminate can also comprise paper and a biodegradable or compostable barrier material produced using water-based dispersion technology (so-called paper barrier laminate).

Plastic packaging, on the other hand, can be, for example, polyethylene (LDPE), polypropylene (PP) film or other plastic packaging material suitable for packaging the material in question, preferably recyclable plastic packaging material. Aluminum foil packages are usually aluminum-plastic composite vacuum packaging bags. Such packages are suitable for e.g. for coffee, large precision machines, chemical raw materials and pharmaceutical intermediates — moisture, light and vacuum packaging.

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N The material of the closure blank according to the invention intended for closing and reclosing flexible packaging, i.e. the so-called the substrate material can be chosen according to the material of the flexible packaging. It can be the same or different ma-

I 30 — terial than the material of the flexible packaging to which the closure is attached. So it can be, for example, paper, plastic, recyclable or compostable textiles.

S rial, or compostable film i.e. film material i.e. film i.e. film material

A aal such as NatureFlex™ or similar or can be made from one monoma-

Different materials can be assembled from N material areas or it can be assembled from several strips — such as paper and cardboard, in which case the blank comprises several different materials. Examples include the following Flexible packaging with a closure: recyclable paper flexible packaging with a closure made of paper; flexible paper packaging, the closure of which is recyclable paper; paper flexible packaging with a non-recyclable paper closure, biodegradable or compostable fiber flexible packaging with a laminate closure, recyclable paper flexible packaging with a laminate closure, —plastic flexible packaging with a plastic closure, aluminum foil flexible packaging with an aluminum foil closure, or any other of these the combination of materials packaging and closure.

When the material of the shutter, i.e. the blank of the shutter, is a laminate, e.g. a NatureFlex™ film made of cellulose, which is a plastic-like material that is weakly permeable to oxygen, it has the advantage that the material in question acts as a protection for the surface of the shutter to be closed again in the open position, that the slime arranged on it does not dry out very easily, and secondly, there is no need to arrange a separate coating on the non-stick surface, but the blank material itself works as a non-stick surface. The same situation is in the case of plastic and aluminum foil blanks, the oxidation of the glue is prevented by the blank material and the blank material acts as a non-sticky surface for the glue of the shutter surface in the open position or when the other surface of the shutter blank, i.e. the surface on which no adhesive surfaces/areas are arranged, is coated with silicone.

The adhesive surfaces of the shutter can be formed on the blank as an adhesive area, stripe or stripes from one or more different adhesives at the point of the fixing surface and the surface of the shutter to be resealed. Forming in this context means applying glue, i.e. gluing, to the surface of the blank. Any suitable glue can be used as the glue, preferably made from any suitable material

N of slime, known for pressure-sensitive labels such as hot-melt, acrylic

N in the production of adhesive emulsions, transfer adhesives, glue, chemically reactive type adhesives, but it can also be formed from other suitable adhesives. Slime can be chosen taking into account recyclability and compostability

I 30 - requirements or not taking into account. In addition, the choice of glue may be influenced by whether the packaging contains food or another product.

S Humidity and barrier may also impose their own requirements on what is used

N for glue. It is possible to fasten the closure by heat sealing, especially plastic

N in bags. The closure is primarily attached to paper and cardboard packages with hot glue, but liquid glue is also possible.

The material of the closure blank and/or its adhesive surface can also be chosen, for example, according to the likely opening method of the packaging material. For example, if the package is likely to open unevenly when opened, as in figures 5b-5c, then it is advantageous that the closure has a more rigid structure and the folding point between its non-stick surface and the sticking surface of the closure functions in a hinge-like manner like the folding point in figures 5b-5c with reference number 55. Even if the material of the shutter is otherwise flexible, for example, at least the resealable surface of the shutter can be stiffened with a separate layer of material. A more rigid shutter is easier to open and close. If the top edge of the flexible package is completely straight or remains completely or essentially straight when opened, it is possible that the closing surface is also flexible, such as paper tape or ordinary plastic-based tape. In the case of a simple flap, the edge area of one side of the shutter, for example between the other side and the surface of the shutter

PART, is sticker-free and can be grasped by the user to set the shutter to the closed and open positions. The flap can also be stiffened. Stiffening can be done with a second layer of material, i.e. by gluing one or more layers of additional material to the area of the flap, i.e. to the edge area on the other side of the shutter surface, or in the case of a thinner shutter blank material, by folding the shutter surface in the direction of the opposite side of the side attached to the package from a small distance, i.e. twice a sufficient length . For example, when the material of the shutter blank is a laminate such as the above-mentioned NatureFlex™ film or the other surface is coated with silicone, and a stiffened flap can be formed for the shutter by folding part of the shutter surface twice so that the film or silicone surface is folded over the adhesive surface, then it becomes a sturdy — flap that does not stick to the adhesive strip. In plastic and foil packages, the edge is not turned

N net or it does not necessarily need to be turned, because the tensile strength of these materials

The N juus itself is so large that they easily withstand the pull required for opening and closing. The flap's reinforcement and non-stick surface can also be obtained with a separate strip of material, i.e. with tape or by gluing the

I 30 ground to the edge area of the other side of the shutter surface and arranging the material strip 3 towards it. 2

N The shutter is either suitable as is or can be modified to close in a different way

N openable packages, such as side-tearable, where a material area is removed from the top of the package, or so-called ez2open bags (see pictures 3a-b, 4a-b), coffee packs or perforated bags. It is also suitable for closing flexible packages that are not sealed or glued, such as standard paper bags without a top seam, plastic bags, etc.

The most cost-effective way to manufacture and supply a closure to a flexible packaging manufacturer is often in the form of a strip formed from a roll. The shutter can be in a roll folded into two or more layers, i.e. e.g. so-called to the open position or it can be so-called as a straight strip in an unfolded form as in Figures 1a and 2a. The shutter can be folded in a roll so that its edges are flat or they are not flat.

The closure can be attached to the packaging material as a strip at the point when the packaging material is unloaded from the roll into the machine, which folds it into bags, with a sufficiently strong adhesive suitable for the purpose. The closure can also be attached to the finished flexible packaging or cardboard box also only when the flexible packaging or box is ready, i.e. in its final form and possibly already filled.

It is advantageous that when the consumer opens the seam of the flexible package, the glue on the closing surface of the closure is completely protected inside the fold, i.e. in the open position, — so that the consumer's fingers do not touch the area of the adhesive surface. In addition, if there is, for example, a flour-like product in the package, then when the shutter is in the open position, the flour cannot block the glue on the resealable surface of the shutter (figures 1a-b adhesive surface 106), because it is fixed against a non-stick surface (figures 1a-b non-stick surface 107). In addition, as already mentioned above, the glue on the shutter surface of the shutter is protected from drying in the open position.

Between two silicone, plastic, aluminum foil or similar surfaces. Kek-

In the closure according to N, there is therefore no need at any point to put a separate strip protecting the adhesive surface on top of the glue, because the glue on the closure surface is always either 2 against the non-stick surface of the closure in the open position or the package stands for 30 in the closed position. 3 Figure 1a shows a flexible package closure 100 according to the invention

A folded and seen from the direction of the shutter surface, which when the shutter 100 is packed

When attached to the N, it is towards the package, and from which direction it is intended — to close the flexible package by closing the open side of the flexible package, i.e. the mouth opening, which is often the top seam of the package, but not necessarily. The shutter 100 in Figure 1a is a cut length, i.e. a piece of shutter roll, the three dots represent the directions in which the shutter would continue. The shape of the closure 100 is elongated or more elongated in the horizontal direction than in the vertical direction, but its shape and size depend on the shape and size of the package to be closed and/or the size of the open side of the package intended to be closed. The shutter 100 comprises at least two horizontal folding points 101, 102. The shutter surface of the shutter 100 has at least three horizontal, i.e. horizontal areas 103, 104, 105.

The attachment surface 105 is the surface between the horizontal first side 110 and the first folding point 101 of the shutter 100 and is the so-called sticky surface.

Glue 108 has been applied to it, e.g. hot glue or some other appropriate glue, with which the closure 100 is attached to the outer wall of the flexible package so that the first side 110 is downwards and the horizontal second side 111 of the closure is in the same direction as the mouth opening of the package, i.e. — upwards when the closure 100 is not close the package. The non-stick surface 104 is between the first and second folding points 101, 102 and can be the blank material of the closure 100 or a material area, e.g. silicone, which is formed or glued to the blank material of the closure 100. The closing surface 103 of the resealable shutter is between the second folding point 102 and the second side 111 of the shutter 100, and it is also the so-called adhesive surface and on which glue has been applied, e.g. the same or a different glue than the glue 108 of the mounting surface 105. The glue 108 can be applied either to the entire mounting surface 105 or only to a part of it. The same also applies to the shutter surface 103, i.e. the adhesive area 106 can be the size of the entire shutter surface 103 or only part of it. In order for the closure to stick to the package better, however, the glue 108 used on the attachment surface 105 is often stronger than

N shutter surface 103 glue.

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- In the closed position, the closure 100 closes the flexible package and the resealable 2 closure surface 103 is releasably attached over the open side of the flexible package

I 30 —on the outer wall of the flexible package opposite to the attachment surface 105. 3 In the open position of the flexible package, the closing surface 103 is attached releasably

S against or placed against the non-stick surface 104 from which it is non-stick

Thanks to the non-stickiness of the N surface 104, easily removable closures

N country packaging over the open side of the packaging, but at the same time it stays clean even in the open position, because the adhesive surface is not unprotected even then. Opening and closing the package, i.e. changing the open-

from the position to the closed position and vice versa is facilitated by the non-glued part, i.e. the flap 109 between the closing surface 103 and the other side 111. As shown in figure 1a, the entire shutter surface 103 does not have glue, but the edge area of the shutter surface 103 towards the other side 111 is glue-free. The flap 109 can be, for example, the material of the shutter 100 blank.

Figure 1b shows the shutter 100 of Figure 1a folded from folding points 101, 102 and as a perspective view. — Figure 1c shows a side cross-sectional view of the closure 100 of Figure 1a when the closure 100 is attached to the flexible package 120. In Figure 1c, the closure 100 is attached to the flexible package 120, but is not placed in the closed or open position, but is between them, and the package 120 and the open side 121 are open and the closure surface 103 and its adhesive area 106 are not against the second outer wall of the package 120 or the non-stick surface 104.

Figure 1d shows the package 120 and closure 100 of Figure 1c in a cross-sectional view from the side, with the closure 100 attached to the flexible package 120, more precisely to the first outer wall of the flexible package 120, and in the closed position, whereby the closure 100 closes the flexible package 120 and the open side 121. The closure surface 103 and its adhesive area 106 are against the package 120, i.e. the second outer wall of the flexible package 120.

Figure 1e shows the package 120 and closure 100 of Figure 1c from the side — in a cross-sectional view with the closure 100 attached to the flexible package

N 120 and in the open position, whereby the flexible package 120 and its open side 121

N are open. The shutter surface 103 and its adhesive area 106 are against the non-stick surface 104. ©

I 30 — Figure 2a shows a flexible package closure 200 according to the invention unfolded and seen from the direction of the closure surface, from which it is intended

S attaches to the flexible package to be used to close the flexible package closing

The open side of the N mall flexible packaging. The shutter 200 of Figure 2a is also

N strip length, i.e. a piece of shutter roll. The shutter 200 corresponds to the shutter 100 essentially — in other respects, but its flap 230 is strengthened by folding a part of the shutter surface 203 twice, i.e. by folding the length, i.e. the edge area of the shutter surface 203 towards the other side 211, i.e. the flap part 209 of the shutter surface 203 from the direction of the other side, partially over the shutter surface 203. This folding point is marked with the reference number 215. In this way, a reinforced, i.e. stiffened, flap 230 is formed, which is sturdier in structure than the flap 109 of Figures 1a-e, so that it can be easier to grasp it and close and open the package, especially if the blank of the closure 200 the material itself would be thin. In this figure 2a, the flap part 209 is unglued, but it is nevertheless possible that the entire area of the shutter surface 203, including the flap part 209, would have been applied with glue before forming the flap. The shutter 200 therefore comprises at least three horizontal folding points 201, 202, 215 due to the flap folding.

The fastening surface 205 is between the horizontal first side 210 and the first folding point 201 of the shutter 200 and is so-called adhesive surface and glue has been applied to it, e.g. hot glue or some other appropriate glue, with which the closure 200 is attached to the outer wall of the flexible package so that the first side 210 is downwards and the horizontal second side 211 of the closure is in the same direction as the mouth opening of the package, i.e. upwards when the closure 200 does not close the package. The non-stick surface 204 is between the first and second folding points 201, 202 and it can be the blank material of the shutter 200 or other non-stick material that is formed or glued to the non-stick surface 204 of the blank material of the shutter 200. The closing surface 203 of the resealable shutter is between the second folding point 202 and the second side 211 of the shutter 200, and it is also the so-called adhesive surface and on which glue has been applied, e.g. the same or a different glue than the glue of the attachment surface 205.

N In the closed position, the shutter 200 closes the flexible package and must be closed again

N closing surface 203 is releasably attached over the open side of the flexible package to the outer wall of the flexible package opposite to the attachment surface 205 for closing the flexible package. It should be noted that the resealable shutter-

I 30 — the attachment point of surface 203 on the opposite outer wall of the flexible package can 3 vary, depending on, for example, the material inside the package

S from the eaves. In the open position of the flexible package, the closing face 203 is attached ir-

N rotatably against the non-stick surface 204, from which it can again be easily removed-

Try to close the package over the open mouth of the package. The stiffened flap 230 made of non-stick material facilitates the — opening and closing of the package, i.e. changing from the open position to the closed position and vice versa.

Figure 2b shows the shutter 200 of Figure 2a in a folded and perspective view. Figure 2b also shows the folding points 201, 202, 215. Figure 2b also shows an arrow that shows how the flap part 209 of the mounting surface 203 is folded at the folding point 215 to form a stiffened flap 230 partially on top of the mounting surface 203.

Figure 2c shows a side cross-sectional view of the closure 200 of Figure 2a when the closure is attached to the flexible package 220. In Figure 2c, the closure 200 is — attached to the flexible package 220, but is not placed in the closed or open position, but is between them and the package 220 and the open side 221 are open.

Figure 2c also shows the two-layer structure of the stiffened flap 230.

Figure 2d shows the package 220 and the closure 200 of Figure 2c from the side — as a cross-sectional view with the closure 200 attached to the flexible package 220 and in the closed position, whereby the closure 200 closes the flexible package 220 and the open side 221. This figure also shows the two-layer structure of the stiffened flap 230 and how it is more clearly from the two-layer structure due to this, it is slightly detached from the 220 surface of the flexible package for easier gripping.

Figure 2e shows the package 220 and the closure 200 of Figure 2c in a cross-sectional view from the side, with the closure 200 attached to the flexible package 220 and in the open position, in which case the flexible package 220 and its open side 221 are open and the closure surface 206 is against the non-stick surface 204. Figure 2e — also shows the flap 230 double layer structure.

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N Since the upper surfaces of the walls of the open sides 121, 221 of the packages 120, 220 in Figures 1c-e and 2c-e are flat, the open 2 sides 121, 221 can be closed tightly and even in some cases almost airtight with the closures 100, 200

I 30 3 The invention is therefore also directed to the spring comprising the shutter according to the invention

S to packaging, i.e. sealed flexible packaging. And one such close-

N-shaped flexible packaging is paper packaging, for example recyclable paper

N package, in which a fiber-tear stopper is arranged in connection with the seam that closes the package. The paper package comprises at least a first package wall and a second package wall, and an adhesive area between the first wall and the second wall. The adhesive area forms the seal that closes the package. The paper package also comprises at least one fiber tear stopper at the edge of the adhesive area or at a distance from it in the direction of the interior of the package. The fiber tear stopper is arranged to limit the separation point of the first wall and the second wall to the edge of the adhesive area or at a distance from it in the direction of the interior of the package when opening the package.

The fiber tear stopper can also be located some distance from the edge of the adhesive area towards the end of the packaging wall. The end point can be the point where said wall has a fold, or the junction of the wall and the bottom of the package.

The advantage of this kind of paper package is that it can be easily opened compared to paper packages closed with traditional glue, — ultrasonic sealing or heat sealing. The package opens without the fiber tear continuing along the wall of the package, so the package opens cleanly and only at the desired point. The packaging according to the invention cannot tear from the packaging wall when the fiber tear stops at the fiber tear stopper. The different implementations of the fiber tear stopper are presented in more detail in the applicant's previous international patent application with the number PCT/F12022/050484.

Figure 3a shows a cross-section from the side of the paper package with a closure according to the invention mentioned above, where the closure 30 is attached to the paper package 37 comprising the fiber tear stopper 33, when the closure 30 is

N in the open position. The package 37 comprises at least the first wall 31

N and the second wall 32, and between the first wall 31 and - the second wall 32 of the adhesive area 34. The adhesive area 34 forms the sealing seam of the package 37 and 2 of its opening side. The package 37 also comprises at least one

I 30 on the edge of the adhesive area 34 of the fiber tear stopper 33. The fiber-3 tear stopper 33 is arranged to limit the separation point of the first wall 31 and the second wall 32 to the edge of the adhesive area 34 of the package 37

When opening A.

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The first wall 31 and the second wall 32 of the package 37 can be attached to each other from the sides of the package with an adhesive, such as glue, ultrasonic sealing or heat sealing, or another suitable method.

The first wall 31 and the second wall 32 can each be separately formed from one or more pieces of material. The walls 31, 32 of the package 37 can be formed from one single piece of material, or from two or more pieces of material attached to each other. The wall 31 or 32 of the package 37 may have a vertical seam or several vertical seams. The package 37 can be formed in such a way that it is hermetically sealed, in which case it is particularly suitable for packaging foodstuffs. The package is opened by separating the first wall 31 and the second wall 32 from each other at the adhesive area 34. The removal is facilitated by the fact that the first wall 31 and the second wall 32 are separated from each other, forming adhesive flaps, outward from the adhesive area 34 (as seen from the direction of the package). By grasping the grip flaps from the outside of the package, the walls 31, 32 are easy to tear apart. In Figure 3a, the shutter 30 is attached to the outer surface of the first wall 31 of the package 37 in the open position. Figure 3b shows the closure 30 and package 37 of Figure 3a, but here — in Figure 3b the package has been opened and closed again with a closure 30, which closes the opened upper side of the package 37, because the closing surface of the closure 30 is attached to the outer surface of the second wall 32 of the package 37 of the opened upper side of the package 37 over. — Figure 4a shows a side cross-section of one according to the invention

N flexible package closure 40 with two fiber tear stoppers 43 attached

N to the flexible package 47. The shutter 40 is in the open position. The first fiber tear stopper 43 is arranged on the inside of the package 47 2 on the side of the first wall 41 on the adhesive area 44, and the second fiber

I 30 — the tear stop 43 is arranged inside the package 47 on the side of the second wall 42 of the adhesive area 44. The advantage of this embodiment is that

S that the fiber tear cannot continue on either side of the adhesive area 44. Pak-

A kaus 47 always opens in such a way that the fiber tear does not continue to the mouth 46 of the package 47

N over or outside the edge of the adhesive area 44. Neither wall 41, 42 of the package 47 is therefore damaged when the package 47 is opened. The contents of the package 47 and the walls 41, 42 remain first-class when the package 47 is opened. In the pattern

4b is the closure 40 and package 47 of Figure 4a, but in this Figure 4b the package 47 has been opened and closed again with the closure 40 and the closure 40 is in the closed position and it closes the opened top side of the package 47 when the closure surface of the closure 40 is attached to the outer surface of the second wall 42 of the package 47 over the opened top page of the package 47.

In some packages, the fiber tear stopper can be formed as a gap or incision in the first wall or the second wall of the flexible package. Thanks to the gap, the fiber tear stops automatically, making it easy to open the package, and the wall of the package is not damaged due to the fiber tear.

In some packages, the fiber tear stopper is formed from a strip, such as a paper strip or a strip of paper tape, which is arranged between the first wall and the adhesive area or the second wall and the adhesive area, so that the edge of the strip and the edge of the adhesive area are essentially on top of each other.

The package can be opened by tearing from the top of the package as in figures 3a, 3b, 4a, 4b. The edge of the strip acts as a fiber tear stopper when the strip and the adhesive area are placed so that their edges essentially overlap, i.e. along the same line parallel to the top edge of the package, or when the fiber tear stopper is placed at a distance d from the adhesive area of the package in the direction of the inner part.

So, like the walls, the strip can be recyclable paper, i.e. a paper strip, or paper tape, i.e. a paper tape strip. It can also be of the same or different material as the walls of the package. Instead of recyclable paper, the strip — can therefore be made of compostable fiber material, i.e. be compostable

A conventional strip of fiber material or it can be made from a laminate comprising paper

N naats, i.e. to be a laminate strip containing paper. Because the adhesive area is - stuck to this strip, fibers from the strip can stick to it when opening the package, 2 but thanks to the fiber tear stop, this stick-caused fiber-

I 30 —the tear cannot progress beyond the fiber tear stopper. A strip made of paper or 3 other compostable fiber materials can also be used

S be a piece of paper tape, a strip or an area that comprises the first planar

A compostable or recyclable pressure-sensitive adhesive on the surface (Pres-

N sure Sensitive Adhesive) and on the opposite, i.e. second surface, heat-sealable or ultrasonic-sealable material. Instead of a pressure-sensitive adhesive, it may also be possible to use a heat-sensitive adhesive on the first flat surface. The heat-sensitive adhesive adheres to the packaging material at a substantially lower temperature than the possible heat-sealable material on the first surface is sealed. A heat-sensitive adhesive can also be compostable or recyclable. The heat-sealable or ultrasonic-sealable material can comprise paper and a biodegradable or compostable barrier material made with water-based dispersion technology, i.e. a so-called barrier material, which does not include plastic. The condition for problem-free opening of the package or bag is that the strips are separated from each other outside the adhesive area, so that they can be grasped — from the outside of the package or bag and ensure that the package tears open cleanly at the adhesive area.

Figure 5a shows a closed flexible package 51 according to one embodiment. The closed flexible package 51 comprises a closure 50 according to the invention and a bag-like plastic flexible package 52. The closure 50 is attached with its attachment surface (not shown) to the wall of the package 52, which in the position according to the figure is the so-called back wall of package 52. In Figure 5a, the shutter 50 is shown with a dashed line, because the shutter 50 is behind the package 52 in this view. The shutter is in the open position. The package 51 has a hanging hole 53, for example a so-called euro hole in the shop for hanging on bars. The bag shown in Figure 5a is especially suitable for packing sweets or other nibbleable snacks. Below the hanging hole 53 is a point where the package 51 is intended to be opened by tearing from the side. The point can be, for example, a small notch on the side of the package 51, which makes it easier to tear off the upper part of the package 51.

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N Figure 5b shows the closed flexible package 51 of Figure 5a, when the package 51 has been opened by tearing off the upper part of the package 51. As can be seen, the torn opening 2 line 54 is uneven. The shutter 50 is still in the open position, i.e. the shutter

The I 30 — 50 shutter surface is glued against the non-stick surface of the shutter 50. The upper part of shutter 3 50 is now visible, but the lower part of the shutter, on the mounting surface of which, e.g.

S was made by heat sealing, the closure 50 is attached to the package 52, is still

A shown with a dashed line because it falls behind pack 52.

O

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— Figure 5c shows the closure-like flexible package 51 of Figures 5a and 5b, when the package 53 is closed with the closure 50, i.e. the closure 50 is in the closed position and its closure surface is glued against the outer surface of the front wall of the package. The torn opening line 54 is now shown with dashed lines because it remains under the shutter 50.

A flexible package with a closure according to the invention, i.e. with a closure, can be manufactured using a method which comprises at least the following steps: - - a piece of material is made available, e.g. a piece of recyclable paper that forms the first wall of the package and a piece of paper that forms the second wall of the package , a piece of paper can also be one continuous piece of paper, from which two pieces of paper are formed by folding; the first on the first wall and the second on the second wall, - — the shutter roll is preferably folded in an open position, - the shutter material is attached to the wall of the package in such a way that the other side of the shutter is towards the openable side of the package, - the first wall of the package and the second wall of the package are attached to each other, for example from the sides or the back seam, e.g. in the case of a single piece of paper, which fixing is done with an adhesive, such as glue, ultrasonic sealing or heat sealing, and - an adhesive area is arranged between the first wall and the second wall of the package, which forms the seam that closes the package.

In the aforementioned method, any suitable material can be used in the flexible packaging. The shutter blank can be

I can also use anything for any purpose and flexible packaging, so

N piva closure material. But in the case of a paper package, the method can - still include the next step before the last 2 step of the method presented above: arranging at least the first wall of the package or the

I 30 —in connection with the second wall of the package, at least one fiber tear stopper, which 3 stopper can therefore be a gap or incision made in the first wall of the package and/or in the second wall of the package 2, in the first wall and/or in the second

A to the wall, for example, the edge of a strip arranged by gluing or to a glued strip

A gap or incision made in N, in addition or alternatively, the stopper can also be the edge of a folded wall, such as the edge of the second wall of the pattern, or only the edge of the wall, such as the edge of the first wall of the pattern.

The method can be applied in a packaging machine, for example, by feeding the closure into the packaging material, which is unloaded as a continuous web from the roll to the packaging machine. The closure material is fed to the packaging machine from its own roll in such a way that it adheres with its adhesive to the surface of the packaging material web so that when the packaging blanks are separated from each other, the closure of each packaging blank is suitable for closing the open or open side of the package.

Sealed flexible packaging can be manufactured using machines, equipment and methods typically already in use in the industry.

Figure 6 shows a paper packaging manufacturing method 60 according to the invention as a flowchart. The method 60 comprises at least the following steps, the order of execution of which may vary. In method step 61, at least one piece of flexible material such as recyclable is arranged as the first wall and the second wall of the package. In method step 62, the closure of the flexible package is arranged in the folded open position. In method step 63, the shutter is attached to the first or second wall of the flexible package in such a way that the other side of the shutter material faces the side of the flexible package that can be opened. In method step 64, the first wall and the second wall of the flexible package are attached to each other using glue, ultrasonic sealing or heat sealing. In method step 65, an adhesive area is arranged between the first wall and the second wall of the package, which forms a seam that closes the opening side of the paper package.

N Figure 7 shows the closure 70 of the flexible package according to the invention attached

N in flexible packaging. The attachment surface of the closure 70 is attached to the first wall 71 of the flexible package, for example, either with hot glue or with some other 2 adhesive adhesive 73. The closure 70 has a sealing surface 76 on its closure pin.

Between I 30 and the other side, from where it is heat-sealed to the other wall 72 of the package after filling the package, i.e. the heat seam 74 is formed between the sealing surface 76 of the closure 70 and the second wall 72 of the package. Pak-

A case is opened by tearing the upper part of the package including the closure 70

N heat-sealed seam surface 76 off. Tear point 75 is shown with a dashed line. After tearing, the closure 70 works as described above, i.e. in the closed position, the closure surface of the closure 70 is attached over the open side to the other wall 72. A hanging hole can be arranged in the part of the package to be torn off.

Figure 8a shows a flexible package closure 800 according to the invention not folded, i.e. straight and seen from the direction of the closing surface, i.e. the surface with which it is arranged to close the open side of the flexible package, i.e. the mouth opening, which is often the top seam of the package, but not necessarily. The shutter 800 of Figure 8a is a cut length, i.e. a piece of shutter roll or length, the three dots represent the direction in which the shutter material would continue. The shape of the closure 800 is often elongated or more elongated in the horizontal direction than in the vertical direction, but its shape and size depend on the shape and size of the package to be closed and/or the size of the open side of the package intended to be closed. The shutter 800 comprises at least two horizontal folding points 801, 802. The length of the shutter 800 has at least three horizontal i.e. horizontal regions 803, 804, 805 and two folding points, the first folding point 801 between the regions 804, 805 and the second folding point 802 between the regions 803, 804.

The fastening surface 805 is between the horizontal first side 810 and the first folding point 801 of the shutter 800. However, in this embodiment, the mounting surface 805 is on the opposite side of the closing surface and therefore the mounting surface 805 is shown in dashed lines. The attachment surface 805 is, for example, in the case of figures 1a-1e, the so-called an adhesive surface and an adhesive has been applied to it, such as e.g. hot glue or some other appropriate adhesive, with which the closure 800 is attached or with which the closure 800 is arranged to be attached to the first outer wall of the flexible package, but in this embodiment so that

The first side 810 of N is upwards towards the mouth opening of the package. Glue can-

N can be applied either to the entire mounting surface 805 or only to a part of it. The difference with the shutter 100 shown in Figures - 1a-1e is that now the mounting surface 805 is on the opposite surface of the shutter 800 than the mounting surface 105 of the shutter 100.

I 30 3 The non-stick surface 804 is between the first and second folding points 801, 802 2 and it can be the blank material of the shutter 800 or other non-stick material-

A dirt. The non-stick material can be, for example, silicone, which is formed,

N arranged or glued to the non-stick surface 804 of the shutter 800 blank material. The closing surface 803 of the resealable shutter is between the second folding point 802 and the second side 811 of the shutter 800, and it is also the so-called

an adhesive surface to which glue has been applied. The glue can be the same or a different glue than the glue of the mounting surface 805. In order for the closure 800 to stick to the package better, however, the glue used on the attachment surface 805 is often stronger in terms of bond strength than the glue on the closure surface 803. The glue can be applied either to the entire shutter surface 803 or only to a part of it, i.e. the glue area 806 can be the size of the entire shutter surface 803 or only a part of it. With regard to the non-stick surface 804 and the closure surface 803, the closure 800 corresponds, for example, to the non-stick surface 104 and the closure surface 103 of the closure 100. — In the closed position, the closure 800 closes the flexible package and the resealable closure surface 803 is releasably attached/glued over the open side of the flexible package to the opposite outer wall of the flexible package as the attachment surface 805 to close the door . In the open position of the flexible package, the closing surface 803 is releasably attached, i.e. placed against the non-stick surface 804, from which it can be easily removed again to close the package due to the non-stickiness of the non-stick surface 804.

When the package is open and the closing surface 803 is folded against the non-stick surface 804, the closing surface 803 remains clean, because the adhesive surface is not open to impurities even then. Opening and closing the package — the non-glued part of the closure 800 is facilitated by the flap 809, i.e. the flap surface between the closure surface 803 and the other side 811. The shutter 800 can also be valveless. The flap 809 can be, for example, the blank material of the shutter 800, to which no glue has been applied.

Figure 8b shows the folding points 801, 802 of the shutter 800 of Figure 8a folded and — as a perspective view.

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N Figure 8c shows the closure 800 of Figure 8a from the side as a cross-sectional pattern, - when the closure 800 is attached to the flexible package 820. In Figure 8c, the closure 800 2 is attached to the first outer surface of the flexible package 820, i.e. the side,

I 30 but is not set in the closed or open position, but is in their intermediate position, when the package 820 and the open side 821 are open and the closing surface 803 and

S its adhesive area 806 unprotected. As shown in Fig. 8c, the attachment

A surface 805 is attached to the package 820 so that the first side 810 is

N towards the open mouth opening 821 of the package 820, because the adhesive surface 805 is on the opposite side of the closing surface of the closure 800. The closing surface is therefore the surface that is from the closure 800 in the closed position towards the open side of the flexible package.

Figure 8d shows the package 820 and closure 800 of Figure 8c from the side — as a cross-sectional view, with the closure 800 attached to the flexible package 820 and in the closed position, whereby the closure 800 closes the flexible package 820 and the open side 821 from above. The closing surface 803 and its adhesive area 806 are against the second outer wall of the package 820. — Figure 8e shows the package 820 and closure 800 of Figure 8c in a cross-sectional view from the side, with the closure 800 attached to the flexible package 820 and folded, i.e. in the open position, in which case the flexible package 820 and its open side 821 are open. The closing surface 806 is against the non-stick surface 804. — Figure 9a shows a flexible package closure 900 according to the invention unfolded and seen from the direction of the closing surface, i.e. the surface with which it is arranged to close the open side of the flexible package, i.e. the mouth opening. The shutter 900 of Figure 9a is a cut length, i.e. a piece of shutter roll, the three points represent the directions in which the shutter 900 would continue. The shape of the closure 900 is often elongated or — more elongated in the horizontal direction than in the vertical direction, but its shape and size depend on the shape and size of the package to be closed and/or the size of the open side of the package intended to be closed. The length of the closure 900 has at least three horizontal i.e. horizontal regions 903, 904, 905 and two horizontal folding points 901, 902, the first folding point 901 between the regions 904, 905 and the second folding point 902 between the regions 903, 904

N in addition. & - The fastening surface 905 is also in this embodiment between the first horizontal side 910 and the first folding point 901 of the shutter 900 and it

I 30 is the so-called adhesive surface and glue has been applied to it, e.g. hot glue or any 3 other glues suitable for the purpose, with which the shutter 900 is attached or with which the shutter

S 900 is supposed to be attached to the outer wall of the flexible package so that first

The A-shaped side 910 is downwards. In this embodiment resealable

The shutter surface 904 of the N shutter is between the first and second folding points 901, 902 — and it is the so-called adhesive surface and on which glue has been applied, e.g. the same or a different glue than the glue of the attachment surface 905. The glue can be applied either to the entire mounting surface 905 or only to a part of it. The same also applies to the shutter surface 904, i.e. its mucus area 907 can be the size of the entire shutter surface 904 or only part of it. In this embodiment, the non-stick surface 903 is between the second folding point 902 and the second side 911 of the closure 900 and it can be the blank material of the closure 900 or other non-stick material, e.g. silicone, which is formed or glued to the non-stick surface 903 of the blank material of the closure 900.

In the closed position, the closure 900 closes the flexible package and the resealable — closing surface 904 is releasably attached over the open side of the flexible package to the outer wall of the flexible package opposite the mounting surface 905 to close the flexible package. The non-stick surface 903 can act as a flap. In the open position of the flexible package, the non-stick surface 903 is removably attached, i.e. placed against the closure surface 904, and vice versa, i.e. the closure surface 904 is — placed against the non-stick surface 903, from which the closure surface 904 is again easily removable due to the non-stickiness of the non-stick surface 903 earth pack over the open side of the pack. The non-stick surface 903 and the shutter surface 904 are sized in relation to each other such that the shutter surface 904 is either as large or smaller than the non-stick surface 903, so that the sticky part of the shutter surface 904 does not fall outside the area of the non-stick surface 903 when they are open against each other. in position.

Although in this embodiment there is no actual separate flap, the non-stick surface 903 facilitates the opening and closing of the package, i.e. changing from the open position to the closed position and vice versa.

Between the closure surface 904 (and the fold 902) of the N way and the other side 911. Kiin-

The adhesives of the sealing surface 905 and the closing surface 904 can again be the same or different adhesives. In order for the closure 900 to stick to the package better, however, the glue used on the attachment surface 905 is often stronger in terms of bond strength than the glue on the closure surface 904. 3 Fig. 9b shows the closure 900 of Fig. 9a folded from folding points 901, 902 and

A as a perspective pattern.

O

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— Figure 9c shows a side cross-sectional view of the closure 900 of Figure 9a when the closure 900 is attached to the flexible package 920. In Figure 9c, the closure 900 is attached to the flexible package 920, but it is not in the closed or open position, but in an intermediate position, and the package 920 and its open side 921 are open and the shutter surface 904 and its mucus area 907 are unprotected, i.e. not against the package or the non-stick surface 903.

Figure 9d shows the package 920 and closure 900 of Figure 9c in a cross-sectional view from the side, with the closure 900 attached to the flexible package 920 and in the closed position, whereby the closure 900 and its closing surface close the flexible package 920 and its open side 921 from above. The closing surface 904 and its adhesive area 907 are against the second outer wall of the package 920.

Figure 9e shows the package 920 and closure 900 of Figure 9c in a cross-sectional view from the side, with the closure 900 attached to the flexible package 920 and folded in the open position, whereby the flexible package 920 and — its open side 921 are open. The shutter surface 904 and its adhesive area 907 are against the non-stick surface 903.

Figure 10a shows a flexible packaging closure 1000 according to the invention unfolded and seen from the direction of the closing surface, i.e. the surface on which the closure 1000 is arranged to close the open side of the flexible packaging, i.e. the mouth opening. The shutter 1000 in Figure 10a is a cut length, i.e. a piece of a shutter roll, the three dots represent the directions in which the shutter 1000 would continue. However, it is possible that shutter 1000 or shutters according to other embodiments are immediately manufactured to a certain length. The shutter 1000 corresponds to the shutter 900 in Figures 9a-9e in other respects, but the shutter 1000 has a processing projection 1030 on the opposite pin of the shutter surface.

N a teddy bear. Processing projection 1030 is shown in Figures 10b-10f. Handling cantilever 1030 is

N plane that protrudes from the opposite surface of the shutter surface, for example - perpendicularly or diagonally. An example of forming the processing projection 1030 2 is shown in Fig. 10f.

I 30 3 Figure 10b shows the cut line A-A shown in Figure 10a of the shutter 1000

Viewed from the S da and the 1000 end of the shutter. In this embodiment, the concept

A lyuloke 1030 protrudes from the opposite surface of the shutter surface of the shutter 1000

N essentially perpendicular.

Figure 10c shows a side cross-sectional view of the closure 1000 of Figure 10a, when the closure 1000 is attached to the flexible package 1020 with its attachment surface 1005, but it is not in the closed or open position, but in an intermediate position, and the package 1020 and its open side 1021 are open .

Figure 10d shows the package 1020 and closure 1000 of Figure 10c in a cross-sectional view from the side, with the closure 1000 attached to the first outer surface of the flexible package 1020 with its attachment surface 1005 and in the closed position, whereby the closure 1000 closes the flexible package 1020 from above. — In the closed position, the closing surface 1004 is against the other outer wall of the package 1020. The first and second walls are opposite walls.

Figure 10e shows the package 1020 and closure 1000 of Figure 10d from the front, with the closure 1000 attached to the flexible package 1020 and in the closed position. As shown in figure 10e, in the closed position, the processing projection 1030 points substantially upwards from the package 1020. The handling projection 1030 can be the entire width of the closure 1000, but it can also be narrower, i.e. only in a part of the closure 1000. The handling projection 1030 can have a hanging hole 1031. The hanging hole 1031 can be a so-called euro hole, from which the flexible packaging can be — hung on a store shelf, e.g. to the bar, from which it can be easily taken. The appearance of the flexible package 1020 remains neat when it is hung in a hanging position. In addition to hanging, the handling projection 1030 can be used to change the position of the shutter 1000 or to facilitate changing the position from the open position to the closed position and vice versa, when the user holds onto the processing projection while controlling the shutter 1000.

Opening and closing N sen 1020 becomes even easier if the flexible

The closing surface 1004 and/or the non-stick surface 1003 of the N cup 1020 is stiffened, for example, with an additional material layer such as a material strip. In this case, the 2 folding point 1002 works hinge-like or at least more hinge-like. Materi-

I 30 — the base strip can be, for example, cardboard, paper tape or any other 3 material suitable for the purpose, which is glued to the surface 1004 and/or 1003. 2

N The processing projection 1030 can be formed in the shutter 1000 with the shutter tape of FIG. 10f

N buy, for example, in the following way. The processing projection 1030 is formed by the projection surfaces 1032 between the shutter surface 1004 and the non-stick surface 1003, which are folded against each other and away from the shutter surface formed by the shutter surface 1004 and the non-stick surface 1003 and the attachment surface 1005. The cantilever surfaces 1032 can be glued together. The closure 1000 with processing protrusion 1030 can therefore be manufactured from one uniform material blank by folding.

However, it is possible to manufacture a shutter with a processing projection in another way, for example by gluing the processing projection 1030 to the opposite surface of the closing surface of the shutter. The handling projection 1030 may be formed or attached to the junction of the shutter surface 1004 and the non-stick surface 1003. — A further unmentioned advantage of the invention is the seal embodiment of the invention, in which the closure is arranged to be wider than the flexible packaging to which it is attached. That is, when the elastic package is viewed either from the front or the back, the closure extends beyond its side seams in the width direction. In this embodiment, the closure is in the closed position, i.e. it closes the flexible package and the parts that extend beyond the sides of the flexible package are vertically sealed together. In this case, the seams of the closure must be torn or cut off in order to open the closure and the flexible package, so the closure also acts as a seal and indicator that the flexible package has not been opened before, for example without permission. This embodiment is shown in Figure 11.

Figure 11 therefore shows the closure 1100 according to one embodiment from the front attached to the flexible package. The closure 1100 is arranged to be wider than the flexible package 1120. As shown in Figure 11, the closure 1100 is in the closed position and the closure 1100 is wider than the flexible package 1120. There may or may not be products inside the flexible package 1120, but the package 1120

In order to open N, the edge part of the shutter 1100 must be torn off essentially along the tear line-

N of 1141 points. After this, the shutter 1100 functions normally and can be opened and re-closed just like the other presented shutter designs. 2 The tear-off edge parts of the closure 1100 may have been seamed vertically z 30 — on each side of the package 1120. The closure 1100 may or may not have a flap 1103 3 to facilitate opening. 2

N The shutter surface and/or non-stick surface of the shutter 1100 can be stiffened here as well

In the N embodiment, as in the other shutter designs presented in the application, to facilitate opening and closing. The material strip can be, for example, cardboard glued to the shutter surface and/or non-stick surface, paper tape or any other material suitable for the purpose.

Figure 12a shows a closure 1200 according to one embodiment, which can be attached to a flexible takeaway food package, for example a fast food package, after it has been filled, in order to ensure that the transport service or the like does not come into contact with the product during transport. The closure 1200 can again be wider laterally than the flexible package to which it is intended to be attached, so that when attached to the package, it sticks together from the outside of the sides of the flexible package and acts as a seal like the closure 1100 in Figure 11. The length of the closure 1200 has at least three horizontal, i.e. horizontal areas 1203, 1204, 1205 and two fold points, the first fold point 1201 between areas 1204, 1205 and the second fold point 1202 between areas 1203, 1204.

The attachment surface 1205 is also in this embodiment between the horizontal first side 1210 and the first folding point 1201 of the shutter 1200 and is so-called an adhesive surface and glue has been applied to it, with which the closure 1200 is attached or with which the closure 1200 is intended to be attached to the outer wall of the flexible package so that the first side 1210 is downwards. The glue on the attachment surface 1205 could have been protected with removable protective paper or the like, which is removed before the closure 1200 is attached to the flexible package. The non-stick surface 1204 is between the first and second folding points 1201, 1202 and it can be the blank material of the closure 1200 or other non-stick material, e.g. silicone, which is formed or glued to the blank material of the closure 1200, at the point of the non-stick surface 1203. The resealable shutter surface 1203, on the other hand, is in this embodiment the second folding point 1202 and the other side of the shutter 1200

between N 1211 and it is the so-called adhesive surface and on which glue has been applied, e.g. the same

N or a different glue than the 1205 glue of the mounting surface. The glue on the resealable shutter surface 1203 could also have been protected with removable protective paper or something similar, which is removed before the shutter 1200 is attached to the flexible packaging.

I 30 or the resealable closure surface 1203 may be against the non-stick surface 1204 until the closure 1200 is deployed and they are separated from each other to attach the closure 1200 to the flexible package 1250.

OF

N Between the resealable shutter surface 1203 and the second side 1211 of the shutter 1200 — there can be a non-glued portion that acts as a flap 1213. All the material layers of the shutter are on the inner surface of the fold, which is the shutter surface.

The shutter 1200 can be a stiffened shutter made of, for example, paper, or it can be made of a stiffer material than paper, such as, for example, cardboard.

Thanks to the stiffer structure, the closure 1200 is easier to attach to the top of the flexible package in the position shown in figure 12a as a downward open fold, which corresponds in shape to a ridge or ridge roof, and it is glued in place to the package 1250 at the points of the attachment surface 1205 and the resealable closure surface 1203. Figure 12b shows the installation method and direction in the flexible package 1250.

It should be noted that in some closures, the resealable closure surface 1203 and the non-stick surface 1204 may interchange with each other.

Figure 13a shows the structure of a flexible package 1300 with adhesive closure and flaps according to one embodiment as a cross-sectional view from the side. In this context, sticker-sealed means that the flexible package 1300 must be resealed. The open side of the flexible package 1300 is heat-sealed together at this stage and in this position of the flexible package.

After opening, the purpose of the shutter is to open again to close — in this figure, the heat-sealed side. The closed flexible package 1300 comprises a first wall 1301, a second wall 1302 and a closure as an extension of the first wall 1301 of the closure. This shutter comprises two folding points 1307, 1308, a resealable shutter surface 1304 and a non-stick surface 1305. The first folding point 1307 is the so-called — at the end point, where the shutter and its resealable shutter surface begin

N 1304 and the second folding point 1308 is the resealable shutter surface 1304 and

Between N non-stick surface 1305. Reference number 1303 denotes the above-mentioned hot seam, with which the first wall 1301 and the second wall 2 1302 are sealed to each other. The reference number 1306 is marked with an adhesive that

I 30 — the end part/end 1302a of the second wall 1302 is arranged to be glued when folded partially over the second wall 1302, in which case also the first wall 2 1301 and its resealable shutter surface 1304 and non-stick surface 1305

A partially turn over the second wall 1302 as a flap. The first wall-

The final part/ends of the N piston 1301 are marked with the reference number 1301a.

Figure 13b shows the openable side of the resealable flexible package 1300 of Figure 13a as a cross-sectional pattern already previously heat-sealed and before opening the flexible package. But in this picture, the closed flexible package 1300 is shown in the form of being opened, i.e. the picture shows how the upper part of the flexible package 1300 is folded over the second wall 1302 into a flap 1310.

The flap 1310 is therefore glued closed by gluing the second wall 1302 at its end 1302a with glue 1306 twice.

In this figure, the non-stick surface 1305 is turned over the reattachable surface 1304 at the second folding point 1308, so that the non-stick surface 1305 does not dry out, i.e. the end part/end of the first wall 1301 is turned twice, whereby the resealable shutter surface 1304 is releasably attached against the non-stick surface 1305. However, this can be left undone and the closing part of the first wall 1301 left unfolded in half — multiplier elins. long.

Figure 13c shows the closed flexible package 1300 of Figure 13b from the side as a cross-sectional view, when the flexible package 1300 has been opened by lifting the flap 1310. Figure 13c shows that the heat seal 1303 has detached from the first wall 1301 and stuck to the second wall 1302. It can also stick to the first wall 1301. This situation is shown in the figure with reference number 1303a. It is also possible that the heat seam 1303 tears in the middle of the seam and parts of it are stuck to both the first wall 1301 and the second wall 1302.

N The downstream end 1306 of the second wall 1302 acts as a fiber tear stopper,

N which prevents the package 1300 from tearing when opening by lifting the flap 1310. - Another fiber tear stopper can be arranged between the first wall 2 1301 and the resealable closure surface 1304 and the non-stick surface

I 30 between 1305, i.e. under the resealable shutter surface 1304 and the non-stick 3 surface 1305. This fiber tear stopper can be, for example, a strip, 3 such as a strip of paper or a strip of paper tape. Also the first wall

N 1301 can be folded into more layers than, for example, in pictures 13b-13d

N is presented, for example the so-called to the z-fold, i.e. a factor of three.

Figure 13d shows the closable flexible package 1300 of Figure 13c from the side as a cross-sectional pattern, when the flexible package 1300 has been closed again by attaching the resealable closure surface 1304 over the open side of the package 1300 to the second wall 1302 of the package 1300, on its outer surface.

Although the resealable closure surface 1304, the non-stick surface 1305, the heat seam 1303 and the adhesive 1306 are clearly expressed in this context as separate boxes on top of the material of the flexible package 1300, the height of the boxes in the picture does not correspond to the reality. In addition, for example, the non-stick surface 1305 can be only the material of the flexible package, without coating, but can also comprise silicone or be silicone.

An as yet unmentioned advantage of the invention is the increase in the surface area suitable for printing. When the upper part of the traditional flexible package is torn off — to open the package, a strip comes off. It is therefore not a good idea to write any essential information about the product in the package in this removable part. The tear-off upper part often only includes the text "tear from here". The closure according to the invention, even though it covers part of the bag, still adds more printable surface area to the package containing the closure. The silicone area of the closure can also be printed to include the desired information, as long as it is done before siliconizing the area. The user's attention may be more easily drawn to the top of the package compared to other parts of the package, because it includes, for example, the mouth of the open bag. It could also be assumed that the movable and movable closure at the top of the package would draw special attention, and at the same time, the contents printing.

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N It should also be noted that in some cases the closure can be a direct extension of the spring packaging material, i.e. a part of the material blank folded into a spring packaging. 2 In this case, the shutter does not need a separate mounting surface.

I 30 3 The embodiments presented in the application are suitable for use in a flexible package comprising a fiber tear stopper.

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N The features of the invention described in the application and the mentioned forms of application are — freely combinable and interchangeable, except if the application specifically mentions that the forms of application or features are not interchangeable. Exemplary features described in connection with different forms of application can be used with any other form of application, even if there is no separate mention of this.

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Claims (16)

Patent claims: 1. A closure for closing the open side of a flexible package, which closure comprises a material blank that comprises at least two folding points, an attachment surface, a resealable closure surface and a non-stick surface, on which an adhesive is arranged on said attachment surface, with which the closure is intended to be attached to the first outer wall of the flexible package, and which attachment surface is between the first side of the closure and the first folding point, and whose non-stick surface of the closure is either between the first and second folding points, in which case the closure surface to be reclosed is between the second folding point and the second side of the closure, or whose non-sticking surface of the closure is between the second folding point and between one side of the closure, in which case the resealable closure surface is between the first and second folding points, and each resealable closure surface, on which glue is arranged, is arranged in the closed position of the closure to be releasably attached over the open side of the flexible package to the other outer wall of the flexible package and in the open position to the non-stick surface of the shutter. 2. A closure according to claim 1, wherein the non-stick surface is uncoated material of the material blank. 3. The closure according to claim 1, where the non-stick surface is silicone or comprises silicone. N 4. A shutter according to one of the preceding claims, in which the edge area of one side of the resealable shutter surface does not contain glue and functions as a flap. 2 5. A shutter according to one of claims 1-3, the edge area of the resealable shutter surface on one side is folded and glued from the direction of the other side 3 partially to form a double flap. 2 N 6. A shutter according to one of claims 1-3, in which a strip of material is glued on top of the edge area of the other side of the resealable shutter surface to form a flap. 7. A shutter according to one of claims 1-6, the material of which the material blank is recyclable paper fiber. 8. A shutter according to one of claims 1-7, whose resealable — shutter surface and/or non-stick surface is stiffened with a separate layer of material. 9. A closure according to one of claims 1-6, whose material blank is compostable or biodegradable fiber material, compostable membrane material, plastic, laminate or aluminum foil. 10. A shutter according to one of claims 1-9, which comprises a handling projection, which is arranged on the opposite side of the shutter to the resealable shutter surface, at the junction of the resealable shutter surface and the non-stick surface. 11. A shutter according to one of claims 1-10, the adhesives of the attachment surface and the resealable shutter surface are the same adhesive. 12. A flexible package, which comprises a closure according to one of claims 1-11, which closure is attached to the outer surface of the first wall of the flexible package with the closure attachment surface, or which closure is an extension of the first wall without the closure attachment surface, but comprises at least two folding points, a resealable closure surface and a non-stick surface on which glue is arranged on said resealable closure surface, and which closure closes the flexible package when the resealable closure surface is releasably N attached over the open side of the flexible package to the outer surface of the second wall of the flexible package and the flexible package is open when the resealable the shutter surface is against the non-stick surface of the shutter. 0 I 30 13. The flexible package according to claim 12, the material of the flexible package 3 being recyclable paper fiber, compostable or biodegradable fiber material, compostable or biodegradable film material, plastic, laminate or aluminum foil. IS 14. The flexible package according to claim 12 or 13, the material of the flexible package is a fiber material and the opening side of which comprises a fiber tear stopper in connection with the seam that closes the open side. 15. A flexible package according to one of claims 12-14, the closure of which is wider than the flexible package in the closed position and which flexible package can be opened by detaching the edge parts of the closure that are wider than the flexible package. 16. The manufacturing method of a flexible package with a closure, which method - — comprises at least the following steps: at least one piece of flexible material is arranged as the first wall and the second wall of the flexible package, the closure of the flexible package is arranged in the folded open position, the closure is attached to the first or second wall of the flexible package so that one side of the closure material is towards the opening side of the flexible package, the first wall of the flexible package and the second wall of the flexible package are attached to each other with glue, ultrasonic sealing or heat sealing, and — an adhesive area is arranged between the first wall of the flexible package and the second wall, which forms a sealing seam of the opening side of the flexible package. N N O N o I a a + O O O N N O N