DE29503132U1 - Packaging, preferably outer packaging and device for producing such packaging - Google Patents

Description

Franz Sperner Drosselweg 12 72654 Neckartenzlingen

3822 028 F/m2

24.02.1995 WP95/1

Title: Packaging, preferably outer packaging and

Equipment for producing such packaging

Description

The present invention relates to a packaging, preferably outer packaging according to the preamble of claim 1 and to a device for producing such packaging according to the preamble of claim

Such packaging, known from DE-Al-43 08 273, is manufactured in the manner of a bag or a cuboid, with the required material element being cut out of a material strip. The production of such packaging is relatively complex.

Pestbank Stuttgart 50771-705 (bank code 600 100 70) · BMidneCBaflDiStuttgart T919 SSVOO (BCZ 600" 860 00) SWlFT-aclress DRES DE FF ID: DE 147507237

The object of the present invention is therefore, on the one hand, to create a packaging of the type mentioned at the outset which has a more favorable shape and can be produced in a simpler manner, and on the other hand, to create a device for producing such a packaging which is structurally simple and operates continuously.

To achieve this object, the features specified in claim 1 are provided for a packaging of the type mentioned and the features specified in claim 7 are provided for a device for producing packaging of the type mentioned at the outset.

The packaging, preferably outer packaging, implemented with the measures according to the invention can be produced in a simpler and material-saving manner, since it can be made directly from a material web of a predetermined width without significant material waste having to be taken into account or occurring. Cutting in the manner of a pattern is not necessary. The device according to the invention uses a structurally simple and inexpensive endless belt, so that the material web can be brought around the winding core in a helical manner and moved along it. During the winding process, both the longitudinal edges and at least one of the ends and, if filled at the same time,

■ ·

·

both ends can also be connected to each other using simple structural means.

The material web can be made of almost any material, such as a nonwoven fabric, a net, a film, e.g. in the form of a dimpled or structured film, paper or similar. It can be useful to choose a material that is biodegradable.

Depending on the intended use, the material web can be provided with a layer that is prepared for the corresponding applications. For example, an adhesive layer can be used if a simple adhesive connection of the longitudinal edges and/or ends of the roll is to be achieved. The layer can also be prepared to be rot-inhibiting, germicidal, water-absorbing or water-repellent, fertilizer-storing, translucent or opaque, coloring or similar. Several of these properties can be combined with one another. For example, if the packaging is compostable, a corresponding layer can contribute to this.

According to a further variant, the packaging can have one or more layers of the same or different material webs, so that depending on the expected load on the packaging from the goods to be accommodated, a correspondingly stable outer skin or wrapping is provided.

Further embodiments of the device according to the invention for producing the aforementioned packaging units result from the features of one or more of claims 8 to 18.

Depending on the width of the material web and the overlap, a certain angle of inclination is specified when feeding the material web. This is preferably around 15°. The overlapping longitudinal edges are connected in a structurally and technically simple manner using a heatable pressure roller, which is preferably driven at a peripheral speed synchronous to the web feed speed, which makes gluing or welding possible, for example.

In a corresponding manner, it is easily possible to close one or both ends of the raw roll using straight heat-sealing bars, i.e. also by gluing or welding. During this heat-sealing process, the raw roll is conveniently separated between these two pairs of heat-sealing jaws, so that when the roll is simultaneously filled with a product, the already filled roll is also closed at the other end and the raw roll to be filled afterwards is closed at the lower end. The filling of the individual

Raw winding can be done in batches without having to interrupt the winding process.

The packaging, preferably outer packaging, can be used for a wide variety of goods and purposes. For example, the packaging can contain chopped straw or leaves, bark mulch or a mixture of leaves, hay and grass. This can be used as sales packaging or as transport packaging. It is also possible to fill such wraps with tea, spices or similar foods. Another use for such wraps is when they are filled with filter materials, so that the packaging can also be used as a filter for dust, for example. Almost all pourable and free-flowing materials can be put into the packaging or outer packaging, which can be done continuously at the same time as the wraps are being produced.

Further details and embodiments of the invention can be found in the following description, in which the invention is described and explained in more detail using the embodiment shown in the drawing. They show:

Figure 1 in schematic, partially sectioned

Side view of a device for producing

of packing units according to a preferred embodiment of the present invention,

Figure 2 is a partially sectioned view along the line II-II of Figure 1,

Figure 3 is a partially sectioned view along the line III-III of Figure 1,

Figure 4 is a view of the packing unit according to arrow IV of Figure 1, and

Figure 5 is a section along the line V-V of Figure 4.

According to Figures 4 and 5, a pourable or free-flowing product is loosely placed in a wrapper 21 of a package or outer packaging 20 that is closed at both ends. The wrapper 21 has the shape of a tubular roll 22 that is formed by a helical or spiral-shaped material web 23 of a certain width, with the adjacent longitudinal edges 24 and 25 of the material web 23 overlapping one another and being firmly connected in the overlap area 26. The two ends of the roll 22 are pressed against one another in a transverse direction and in a straight line parallel to one another and are firmly connected to one another to form a strip-like closure edge 27, 28.

• *

·

Figure 4 shows that the roll 22 changes into a roll with an oval cross-section when lying down due to its loose filling level. It is also possible to wind the covering 21 from a two- or multi-layer web 23.

The material web can be made of different materials. For example, the web 23 can be made of nonwoven fabric, a net, a film, e.g. dimpled or structured film, paper or the like. The respective material web can be provided with a corresponding layer in order to have certain properties. The layer can be, for example, an adhesive layer that is applied to one side of a film or paper and that is arranged so as to impregnate a nonwoven fabric or a net. This layer can also be prepared, for example, to be rot-inhibiting, germicidal, water-absorbing or water-repellent, fertilizer-storing, translucent or opaque, coloring or the like. Several features can also be implemented simultaneously.

If the layer is, for example, an adhesion promoter made of heat-sealable adhesive material that is activated by pressure and temperature, then both the firm connection of the longitudinal edges 24 and 25 to one another and the two end-side material web connections in the form of the upper and lower sealing edge strips 27 and 28 can be produced in a simple manner.

If no such layer is present and the material web is formed by a plastic film or a plastic net, it is also possible to produce the aforementioned connections in a simple manner by welding.

The material of the web can, for example, also be biodegradable and/or compostable in a more cost-effective manner thanks to an additional layer.

Figures 1 to 3 show a device 31 for producing tubular rolls 22, for filling the tubular rolls 22 with pourable or free-flowing material 11 and for closing the rolls 22 at both ends when filling takes place at the same time.

The device 31 is provided with a hollow winding core 32 which is held stationary and non-rotatable and which is arranged vertically. At an angle of < 90* to the axis of the winding core 32 (from diagonally top right in Figure 1) a feed 33 (not shown in detail) for the material web 23 to be pulled off a roll (also not shown) is arranged. The feed 33 can contain guide or deflection rollers arranged in different levels. The material web 23, which is fed diagonally to the outer circumference of the winding core 32 at an acute angle of 15° to the horizontal, is pulled off the roll (not shown) via

the feed 33 and conveyed axially along the winding core 32. In the course of the feed 33, i.e. in front of the winding core 32, a printing station 34 with a printing roller 35 is provided, at which the material web 23 can be provided with an imprint for advertising, for a list of contents or the like.

The drive device 36 has a rotating belt 37, the width of which is preferably smaller than the width of the material web 23. This endlessly rotating belt 37 runs around two deflection rollers 38 and 39 facing away from each other and arranged on both sides of the winding core 32, the axes of rotation of which are arranged perpendicular to the axis of the winding core 32 and one of the two, for example the deflection roller 38, is driven by a motor. The deflection rollers 38, 39 are aligned parallel to each other, but are offset in height from each other in such a way that their imaginary connecting line is also inclined by about 15° to the horizontal and thus the resulting direction of the belt 37 is essentially approximately the same as the direction of the incoming material web 23. Starting from the right-hand deflection roller 38 in Figure 1, the belt 37 wraps around the winding core 32 with its slightly less inclined incoming strand 41 by essentially about 360", with the wrap being directed obliquely downwards, and then runs with its outgoing strand 42 to the other deflection roller 39, from which the return strand 43

preferably without contact past the winding core 32 and back to the deflection roller 38. The belt 37 is driven in this direction B and opposite direction B' just described, and thus parallel and in the same direction as the drive direction A of the material web 23. The winding core 32 is wrapped by the belt over and on the material web 23. By the contact of the inclined incoming and inclined wrapping belt 37 with the material web 23 on the winding core 32, the material web 23 is forced into the helical movement around the winding core 32 and is conveyed further downwards, as can be seen from Figure 1.

Between the feed point of the material web 23 to the winding core 32 and the drive device 36, i.e. approximately after a wrap angle of 360° after the feed point, a device 46 for connecting the overlapping longitudinal edges 24 and 25 of the nonwoven web 23 is provided on the upper part of a frame 44, on which the drive device 36 is also held, which device here has a heated pressure roller 47, the axis of rotation 48 of which is arranged essentially approximately perpendicular to the direction A of the fed material web 23. The pressure roller 47 is driven in rotation by a motor 49. The peripheral speed of the pressure roller 47 corresponds essentially approximately to the feed speed.

or conveying speed of the material web 23 to or around the winding core 32.

After a further wrap angle of approximately 360° of the material web 23, which is now connected at the longitudinal edges 24 and 25, the drive device 36 or the endlessly rotating driven belt 37 is applied to the material web 23 and conveys the raw roll 22' thus produced along the winding core 32 until it runs out over the lower end of the winding core 32 and reaches a combined closure/cutting device 51. The closure/cutting device 51 held on a lower part of the frame 44 has a closure unit 52 which has two pairs of bars arranged one above the other, here pairs of sealing bars 53 and 54, whose opposing straight sealing bars 56 and 57 and 58 are arranged on both sides of the raw roll 22' and can be moved in a synchronous manner towards and away from this raw roll 22' on longitudinal guides 59, 60 according to the double arrows C and D. The sealing bars 55 to 58 arranged in a direction perpendicular to the axis of the winding core 32 and perpendicular to their horizontal guides 59, 60 are heated and press, for example under hydraulic pressure, the material web 23 of the raw winding 22' against each other at two points arranged at a short distance above one another, so that after activation of the sealing bars 55 to 58, the upper sealing edge 27 of the

W? · &psgr;&phiv;

the roll 22 already filled with the product 11 and the lower closure edge 28 of a raw roll 22' still to be filled are produced simultaneously.

During the activation of the sealing bars 55 to 58 and thus the production of the two closure edges 27 and 28 under pressure and temperature, i.e. by gluing or welding, for example, the raw roll 22' is separated from the preceding finished roll 22 between the two closure edges 27 and 28 with the help of a cutting unit 62 of the combined closure/cutting device 51. For this purpose, the cutting unit 62 has a knife 63 which can be moved back and forth according to the double arrow E parallel to the directions C and D of the sealing bars 55 to 58. After opening the closure unit 52, the finished packaging unit 20 falls downwards, for example onto a conveyor belt. The lower end of the raw roll 22' is conveyed further downwards in a vertical direction beyond the end of the hollow roll core 32 and in the meantime is loosely filled with the pourable or free-flowing material 11 through the roll core 32.

The material 11 is fed through a filling funnel 67 connected to the hollow winding core 32, between which and the winding core 32 a dosing channel 66 with a dosing unit 65 is arranged. The dosing unit has, for example, an upper and lower dosing flap 68, 69, the distance between which can be adjusted for different quantities and

between which the amount of cardboard shreds 11 to be filled into a tubular raw roll 22' is determined and dosed. If the raw roll 22' following the finished outer packaging 20 is filled up to the predetermined area, the area of the raw roll 22' located above the filling level passes into the combined closure/cutting device 51. There, a joining process and a cutting process begins again, as described above.

Although the device 31 has been described in connection with a simultaneous filling of the outer packaging 20 with a pourable or free-flowing material 11, it is understood that the device 31 can also be used exclusively for producing the rolls 23 which are then only closed at one end.

Claims (18)

Protection claims 1. Packaging (20), preferably outer packaging, for pourable and free-flowing goods, foodstuffs or the like, which is made from a material web (23), characterized in that it is formed by a coil (22) formed from the material web (23) in a helical manner, the helical longitudinal edges (24, 25) of which overlap one another and the ends of which are connected by laying them flat against one another along a narrow strip (27, 28). 2. Packaging according to claim 1, characterized in that the material web is a nonwoven fabric, a net, a film, paper or the like. 3. Packaging according to claim 1 or 2, characterized in that the material web is formed by a biodegradable material. 4. Packaging according to one of the preceding claims, characterized in that the material web has an adhesive, anti-fouling, germicidal, water-absorbing or water-repellent, fertilizer-storing, translucent or opaque, coloring or similar layer. 5. Packaging according to one of the preceding claims, characterized in that it is compostable. 6. Packaging according to one of the preceding claims, characterized in that it comprises one or more layers of identical or different material webs. 7. Device (31) for producing packaging (20) designed according to at least one of claims 1 to 6, with a preferably vertically arranged, preferably hollow winding core (32), with a material web feed (33) which is arranged at a predetermined angle to the axis of the winding core (32), with a drive device (36) for pulling the material web (23) from the feed (33) and for winding the material web around the winding core (32), with a device (46) for connecting the overlapping longitudinal edges (24, 25) of the material web (23) in the region of the first winding layer of the material web on the winding core and with a closure device (51, 52) and a cutting device (51, 62) which are arranged below the winding core (32), characterized in that the drive device (36) for pulling the material web (23) is formed by a rotating driven endless belt (37) which to the axis of the winding core (32) and under a is arranged at an angle corresponding approximately to the material web feed angle and rotates around the winding core (32) on the material web (23) over a wrap angle of approximately 360°. 8. Device according to claim 7, characterized in that the angle of inclination of the material web (23) or the endless belt (37) relative to the horizontal is approximately 15°. 9. Device according to claim 7 or 8, characterized in that the device (46) for overlappingly connecting the longitudinal edges (24, 25) of the material web (23) is formed by a heatable pressure roller (47). 10. Device according to claim 9, characterized in that the axis (48) of the pressure roller (47) is arranged approximately perpendicular to the direction of the material web (23). 11. Device according to claim 9 or 10, characterized in that the pressure roller (47) is driven synchronously with the feed speed of the material web (23). 12. Device according to at least one of claims 7 to 11, characterized in that the Closing device (51, 52) is formed by upper and/or lower pairs (53, 54) of straight heat-sealing jaws (55 to 58) and that the opposite jaws (55 to 58) of each pair (53, 54) are movable towards each other. 13. Device according to claim 12, characterized in that the cutting device (51, 62) is arranged between the upper and lower heat-sealing jaw pair (53, 54). 14. Device according to claim 12 or 13, characterized in that the two pairs of heat-sealing jaws (53, 54) are movable synchronously. 15. Device according to claim 13 or 14, characterized in that the cutting device (51, 62) can be activated during the heat sealing process of the heat sealing jaw pairs (53, 54). 16. Device according to at least one of claims 7 to 15, characterized in that a filling funnel (67) for receiving a pourable or free-flowing material (11) is arranged above the hollow winding core (32). 17. Device according to claim 16, characterized in that a filling quantity dosing unit (65) is arranged between the filling funnel (67) and the hollow winding core (32). 18. Device according to at least one of claims 7 to 17, characterized in that a printing station (34) is provided in the area of the material web feed (33).