DE1561966A1 - Method and device for packaging goods - Google Patents

Description

Patent attorneys Dipl.-Ing. F. We ic km ann, Dr. Ing. A. Wei c km an ν DIPL.-ING. H.WeICKMANN, DIPL.-PHYS. DR.IlSfilNokS '

Dipl.-Ing. F. A-Weickmann, Dipl.-Chem. B. Huber

8 MUNICH 27, DEN 1561966

MOHLSTRASSE 22, CALL NUMBER 483921/22

SABM

AMERICAN MACHINE & IOUNDRY COMPANY, 261 Madison Avenue, New York, NY, V.St.vA

Method and device for packaging goods

The invention is in the field of packaging technology and more particularly relates to a method and apparatus for packaging goods in an easy-to-open Fackung.

Blastic foils based on cellulose and synthetic resin are used usually in fast-working automatic machines used, the items of the same type from the bread and baked goods family delivered in a row pack quickly. In such a machine the foil

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generally supplied by one or more reels or other supply sources as unlimited web and passed through a packaging station where an object is wrapped in the film.

For some such goods, it is advantageous to enclose the goods in a pack that can be quickly moved and "can be opened easily. Mn is a more common way of producing such an easy-to-open package that Perforate packaging material. This creates a certain pattern in the pack, which is created by using can be torn apart by a small force. However, it has proven difficult to create perforation patterns on plastic sheets made of cellulose or plastic in a convenient way, especially if it is quick and easy to install. connection with other work steps in the packaging process.

The invention is therefore based on the object of a method and a device for the rapid packaging of goods to create in easy-to-open packs. V / pus the invention seeks to ensure packaging material in a single operation of the manufacturing process to be able to close and perforate. The invention is also directed to an improved method of perforating Plastic wrap directed. The invention also relates to an improved pack.

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According to the invention, two webs of a film from a remote storage area become a work area delivered where they surround an object to be packaged; the one sheet of film is already in front has been perforated in a first perforation pattern upon arrival at the workstation. The slides will then welded to the leading edge of the object, while a second pattern of perforations is made in the film. The object with the Cover lifted lengthways through the work area, with the film webs on the sides of the item be welded. Then the two sheets of film are cut off at the trailing edge of the object welded together and perforated in a third cough, with which a pack is ready.

An expedient embodiment of the invention is shown below described with reference to the drawings. Show it:

Fig. 1 is a schematic plan view of an embodiment of the invention;

2 shows a schematic side view of this;

3 shows a side view of the arrangement for cutting through, welding and perforating the packaging material in a single practical, simultaneous operation j

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Pig. 4 a section through. the arrangement of the pig. 3 after the line IV-IV of this Pigur.

Pig. 5 is a sectional view of the in Pig. 3 shown embodiment according to the line V-V of this Pigur}

Pig. 6-8 cuts of the arrangement for cutting through, welding and perforating the successive Show work phases;

Pig. 9 shows a diagram of the control circuit for the device according to the invention.

A pole of objects or groups of goods that are packaged are to be, a first conveyor 10 is delivered ai. In the exemplary embodiment of the invention described here, the device is used for packing an oil of groups of twenty-four rolls. However, the invention is suitable for packaging groups All kinds of goods or for packing individual items. The only modifications required concern additional devices that operate the device, as will become clear later.

In the exemplary embodiment to be described, the Goods to be packaged are guided past a scanning device 12 and arrive at one of a printing cylinder actuated gate 14. The scanning device 12 and the

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Printing cylinders 15 for the gate are by suitable Means functionally coupled. In the in the Pig. 1-3 The device shown is the gate to the sensing of the correct number of pieces of a given group of rolls - for example twenty-four - or a single object or any other given Number of pieces open. The rolls are then forwarded to a conveying and grouping mechanism 16, which arranges them in a tightly packed group and passes a second scanning device 18 a conveyor 19 which is aligned with the conveyor and grouping mechanism 16.

The scanning device 18 is provided with a clutch and Brake device functionally connected, which in turn is coupled to two feed rollers 20 and 21. These feed grooves pull webs of packaging material 22 and 23 from supply rolls 24 and 25, respectively, during operation. if

the material web 22 is pulled from the supply roll 24, it passes a perforating wheel 26, which is in the web a longitudinal perforation pattern attaches.

Two drive rollers 28 and 30 on either side of the conveyor 19 pull the films longitudinally on the conveyor 19 along. The drive rollers 28 and 30 become so fast

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rotated that they move the film webs 22 and 23 slightly faster than the feed rollers 20 and 21 the Deliver lanes to allow them to slip and to keep the lanes taut. While the packaging material and moving the rolls along the conveyor 19, two retractable hot wires 34 fuse together » one on each side of the conveyor 19, the longitudinal edges of the film webs 22 and 23 with one another, while the webs pass under them. Control compressed air cylinders the movement of the retractable wires, which are normally lifted off at rest.

The conveyor 19 brings the rolls and the partially finished packaging which envelops the rolls to a station 36, where the packaging is cut from the film webs at the rear end and the packaging is completely closed will. The front end of the pack is already at station 36 during the previous operating cycle has been welded, as will be explained in more detail below.

Shortly before the station 36, a scanning device 38 is arranged above the conveyor 19. The scanning device 38 is functionally connected to two valves, one of which is the coupling associated with the film feed. and braking device inoperative, while the other an arrangement 40 for welding, penetration

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cut and perforate actuated at station 36.

Like from Pig. 5, the arrangement 40 two functionally coupled subunits 42 and 44, the former above the conveyor belts and the latter is arranged below the same at a distance therefrom. The subunits 42 and 44 are made up of a total of one at 46, the drive mechanism is moved back and forth between an opening and a closing position. In their open position, the sub-units 42 and 44 have a sufficient distance to accommodate the packaging material. material and the goods in it to pass.

The subunits meet in their closed position 42 and 44 in a plane which is above the conveyor 19 and at a distance of approximately half Thickness of the item to be packed.

The sub-unit 42 has an upper part 48 and a lower part Part 50 on. The lower part 50 has two clamping bars 52 and 54, which have a predetermined distance, see FIG. 4. A heating wire 56 is between two compression spring arrangements 58 and 60 which in turn are attached to the top 48 at 62. The compression spring assemblies 53 and 60 are used to keep the heating wire taut; they have holders 64 and 66 for the

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Wire on, which are sized and arranged that the Heating wire 56 to lie between the clamping rods 52 and 54 comes, at a distance above the bottom surface of the clamping rods and parallel to them, as from the Pig. 3 and 5 becomes clear.

The upper and lower parts are connected to one another by a plurality of connecting pieces 68. Every connection

a

piece has / elongated hole 70. On the upper part 48 are several Pins 72 attached, which are received in the elongated holes of the connecting pieces 68, so that the upper part relative to the kidney part in the elongated holes 70 displaceable is. Springs 73 push the two parts apart, so that they are normally the one shown in FIG Take a stand. However, when the sub-units are moved to their closed position, the upper part will 48 pressed down a distance equal to the length of the elongated hole less the diameter of the pins 72 is. This distance is greater than the distance that the heating wire 56 would normally be above the bottom surface of the clamping bars 52 and 54 has. Since the heating wire 56 is connected to the upper part 48, it becomes the lower part if it is Part 50 is lowered below the ground level of the clamping bars 52 and 54 depressed.

A perforation element is provided on the surface of the clamping rods 52 and 54 74 attached. As best seen in FIG. 3, the teeth 76 of the perfusion element stand

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down over the bottom of the clamping rods 52 and 54 in front.

The lower sub-unit 44 has two clamping rods 78 and 80, which are supported and spaced in the same way as the clamping rods 52 and 54 The clamping rods 78 and 80 carry on their outer surface easily pierceable elements 82 which are at a distance are arranged by the perforation elements 74 and their purpose will be explained in more detail.

The drive mechanism 46 has a pressure cylinder 84 and a piston rod 86 which is retracted when the pressure cylinder is actuated. An intermediate member 88 is rotatably supported on the frame 89 of the device and connected to the piston rod 86 at 90. A rod 92 connects the rotatable link 88 to the subassembly 42; Another rod 94 connects the rotatable link to the sub-unit 44 A second rotatable link 96 is supported on the frame 89 and connected to the first link 88 via a rod 98. A rod 100 connects the intermediate link 96 to the subassembly 42 and a rod 102 connects to the subassembly 44.

In the illustrated arrangement, the piston rod 86 rotates the intermediate member 88 when the pressure cylinder 84 is actuated clockwise. The rod 98 causes the second

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Intermediate member 96 at the same time counterclockwise rotates, and the rods 92, 94 »100 and 102 force the sub-units 42 and 44 towards each other in their closed position, wherein the clamping rods 52, 54i 78 and 80 meet and pinch the two sheets of film between them.

As mentioned above, the teeth 76 of the perforation element 74 extend somewhat below the bottom surface of the clamping rods 52 and 54 so that they grasp the film webs before they are clamped (Fig. 6). Foil material, For example polyethylene, however, it is very difficult to perforate if it is not clamped, because it is elastic is and evades if it is to be pierced. For this reason, the easily pierceable elements 82 provided, which can be, for example, a vertically arranged nylon brush or a similar body. With this arrangement, the film becomes at a predetermined point in the movement of the subassemblies 42 and 44 towards one another for a brief moment between the front tips of the teeth 76 of the perforation elements 74 and the pinched the upper end of the bristles of the elements 82. With the further movement of the four clamping rods towards each other the teeth 86 are pressed through the film into the elements 82 'and form a transverse perforation pattern on the pack. If the four clamping rods get closer, the packaging material will be as before

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mentioned, sandwiched between (Fig. 7).

When the piston rod 86 is now withdrawn further, the rods 92 and 100 press the upper part 46 of the sub-unit 42 against the force of the springs 73 to the lower part 48. The heating wire 56 is thereby through the stuck packaging material "into the space lowered between the Kelemmstangen 78 and 80 and thus the packaging material is welded together and separated (Fig. 8).

As can be seen from Fig. 8, the operating circuit includes the scanning device 12, which is connected to the air cylinder 15 is connected to open the gate 14. In the present example, the scanning device 12 operates as a Counter and has a sensor 106 and a stepping relay 108, which is a means for presetting 110 has. This is set to four in Figure 9; on the perception of 4 rows of rolls with the help of one Sensor 106 towards a delay relay 112 is energized, which after a predetermined period of time a solenoid-controlled Four-way valve 114 energized; this causes compressed air from a supply of compressed air to enter the compressed air cylinder 15 transferred to the open position of the normally closed getter, so that the gate 14 opens. The sensor 106 can be a photocell, a switch or a corresponding switching element.

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Simultaneously with the delay relay 112 is another second delay relay 116 energized. After a second predetermined period of time, which is sufficient in the present Pail, in order to allow four rows of bread to pass through the gate, the delay relay 116 switches the four-way valve 114 so that the printing cylinder 15 closes the gate 14.

Wean the leading hand who slipped through the gate A solenoid-controlled four-way valve 118 is activated when the roll reaches the scanning device 18 and stimulates it switched so that the pneumatic coupling 120 of the feed mechanism by means of compressed air supply from a supply source (Roller sets 20 and 21 and drive wheels 28 and 30) pressed in and the brake 122 of the same mechanism is resolved. In addition, the scanning device 18 is connected to a printing cylinder 123, the retractable Wires 34 for welding the side edges, -der brings the pack into the working position.

The scanner 38 is also associated with the solenoid controlled valve 118 connected. If she is aroused by the leading edge of a group of rolls, it will Four-way valve 118 switched to its other position, whereby the clutch 120 is disengaged and the brake 122 is inserted. The wires 34 are then withdrawn to their rest position.

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A delay relay is also attached to the scanning device 38 124 is connected, the "when the scanner is energized a four-way valve 126 moves in such a way that the air cylinder 84 connected to it moves the assembly 40 for welding, severing and perforating is set in action,! Times a predetermined period of time lifts the delay relay 124 and leads the four-way valve 126 in the starting position and the arrangement 40 in the. Open position back.

The compressed air for the clutch 120, the brake 122 and the pressure cylinder 123 is supplied by a compressed air source and passed through a filter 130 and a pressure regulator 132 before being fed to the four-way valve 118 at 134 got. The compressed air for the pressure cylinders 15 and 18 flows through a pressure lubricator 135 before being at 136 is passed to the animal path valves 114 and 126, respectively.

An electric motor 137 supplies the energy for the various, en sponsor. The latter are set in motion when the device is switched on and run continuously, until the engine (and thus the entire device) is switched off. The motor only drives the feed rollers when the clutch is engaged.

With the feed rollers 20 and 21, a pressure cylinder 138 is connected, which the feed rollers to the therebetween

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a continuous film. The pressure cylinder is actuated by a solenoid valve I40 Puncture of this valve is with the on-off switch for linked the Hotor 137. A pressure cylinder 142 is provided to exert a pressure on the drive rollers 28 and 30 in the direction of their contact point, so that they exercise their puncture of single-beaming and advancing The pressure cylinder 142 is actuated by a solenoid-controlled valve 144, which also has the on / off switch of the motor 137 is coupled. The compressed air for the pressure cylinder 138 flows through a second pressure regulator I46, since a reduced pressure is required for this.

IM switching on the device during operation, the Foil webs guided around several intermediate rollers 148 and through the drive rollers 28 and 30 to just behind the Station 36 pushed. The assembly 40 is started for one cycle of operation with the excess packaging material before deia heating wire 56 removed and the leading tape of the first packing ^ melted shut and is perforated.

The objects to be packaged, in the present pail groups of rolls, are then placed on the scanning device 12 advanced past to gate 14. When the correct number of items is reached, the gate 15 and the semman open run on the conveying and grouping mechanism 16

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past the scanner 18 to the conveyor 19 Further, when dac leading hand of the first Semmlereihe the scanning device 18 is activated, the clutch is engaged 120 and solved the pumices 122 so that the feed of the ^ olienbahnen begins 22 and 23 ". Me are iolienbahnen of the Drive rollers 28 and 30 moved further in longitudinal direction at approximately the same speed as the rolls can be seen on de © 3? Ö2? Aersr 19 Moving "In this way" the shutdown of the foil pieces remains. 22 and 23 * which is located at the inlet of the conveyor I9 _for the scanning device 18, on the front terrace of a Seaa group, also to the exit of the conveyor 19, ie at the scanning device 38, on the front of the S _e mmlgruppe. ■

It should be noted that the length of the conveyor 19 is adjustable and to the length of the item to be packaged, in this case to the length of four rows of bread rolls, is set. 2a that formed according to the invention The length of the pack is roughly the same as the length of the packaged item. length of the conveyor 19 changed to fit them to äea su packaging .Segetistaüd aasappen, the 11th odor melirerea Bittz-elstiiolceii can order.

first üemiselsruppe is pre-requested on the conveyor 19 sur A "b tasteinrioiitung 38, the foil webs 22 and 23, meanwhile, on the sides of the sea

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Bread group welded together with the help of wires 34 which is in its working position when the scanning device 18 is excited were brought.

When the scanning device 38 is excited, the film advance is stopped by disengaging the clutch 120 and engaging the brake 122. At the same time, the wires 34 are raised and the assembly 40 is started. Forms the latter, the ^v order ridge of the rolls confining pack, by separating the front edge from the rear edge of the precedent ended package, the latter is empty in this single Pail, and a transverse perforation 150 einpreßt in the Folienbahnea. The perforation pattern 150 runs perpendicular to the perforation pattern 152, which was applied in the film web 22 by the perforating wheel 26.

When the clutch and brake device lifts the film pre-BChub interrupted, the conveyors keep moving. This keeps the foils taut as the pack is at most can move around a tiny piece and on the Foil webs 22 and 23 a train is exerted.

At this point in the operating cycle, the pack is half-finished because it has been cut off at its front end and is perforated and its side edges are welded shut about half of the wires 34.

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. At. At this point in the operating cycle a next group of rolls the gate 14- »for what purpose the conveyors are timed so that the objects or groups of goods advance one after the other on the conveyor 19, So when the following group of rolls has advanced to the point on the scanning device 38, is located the trailing edge of the leading package touches assembly 40 and the side edges are now complete whitened by the wires 34. By the action of the assembly 40, the leading pack of the following pack is separated, the rear edge of the front pack is welded shut and a second a transverse perforation pattern 154 is applied to this edge.

At the same time, however, the leading edge becomes the following Pack closed and provided with a perforation pattern corresponding to pattern 150. This The operating cycle is repeated.

Compared to the described and illustrated embodiment, changes are made in the context of the invention Construction details and the arrangement of the parts are possible.

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Claims (15)

PATE II TAHSPRÜ GHE: 1. A method for packing ΐ / aren, characterized in, that the! to be packaged fare between two continuous Sheets of packaging material is brought that the sheets of packaging material at the front and the two sides of the goods are sealed together so that at least one of the two webs in one predetermined first pattern is perforated that then the webs of packaging material also on the back the goods are connected and cut off, so that a package is created that envelops the goods, and that a further perforation pattern is applied to at least one of the tracks, the same as that applied earlier Perforation pattern connected in such a way that the package is easy to open. 2. The method according to claim 1, characterized in that the closing, cutting and the last-mentioned Perifirieren take place practically at the same time. 3. The method according to claim 1 or 2, characterized in that that the first perforation pattern is applied approximately parallel to the sides of the goods, while the second perforation pattern is arranged perpendicular to the first. 009817/0125 " ¹⁹ " BATH ORIGINAL 4. The method according to claim. 1 or one of the following claims, characterized in that the two webs of packaging material are advanced in the longitudinal direction and in at least one web a longitudinally extending perforation pattern before the goods to be packaged are introduced between the two tracks. 5. The method according to claim 4 _f, characterized in that after the introduction of the goods between the webs of packaging material, the leading hands of the webs are welded in the transverse direction miteinaKfer, that then a first transverse perforation pattern in the webs at a distance from their welded front hands is attached, which crosses the longitudinal> de Perforationslauster, that after the welding of the side edges of the webs, a second transverse perforation pattern is applied at a distance from the first, which also crosses the longitudinal perforation pattern, and that behind this second perforation pattern, oil webs of the packaging material with each other welded and cut through. 6. The method according to any one of the preceding claims, characterized characterized in that two stations are provided, one first station in which the viare between the delivered Webs of packaging material is introduced, and 009817/0125 _2o BATH ORIGINAL a second station in which the webs at the rear edge of a leading product are welded together and separated in a single operation, the long sides of the webs being closed along the product during transport from the first to the second station, so that from the second station the goods are delivered fully packaged wtrd. 7. The method according to claim 6, characterized in that daf the goods in each case consists of a group of individual pieces. 8. The method according to claim 6, characterized in that the goods are a single item. 9 * Device for carrying out the procedure according to one of the The preceding claims, characterized by an arrangement (24,25,148,20,21) for delivery two lanes (22,23) of packaging material to a work area, by a conveyor system (10, 16) for delivering the packaging to the za Goods between the two lanes of packaging material at the end of the work area, by a device (28,30) responsive to the arrival of the goods between the lanes of the packaging material for VHtransportation of the goods with the lanes of the packaging material through the work area, 009817/0125 _ ₂₁ _ BATH ORIGINAL one at the other end of the work area Scanning device (38), and by an arrangement controlled by the scanning device (38) (40) for welding the webs in front of and behind the goods, for perforating the webs next to the welded ones Edges and for separating the resulting package from the rest of the webs. 10. gate direction according to claim 9, characterized in that the arrangement (40) for welding, perforating and separating a pair of spaced apart clamping rods (52, 54 »78.80) above and below the strips of packaging material has and that on the one pair of clamping rods (52,54) perforation elements (74-) are attached and between An element (56) for severing the webs is movably mounted on the clamping rods of this pair. 11. The device according to claim 10, characterized by a Drive (46, 84-102) for the clamping rods, which is controlled in such a way that the clamping rods have one operating cycle run through, in the first part of which they are spaced apart and in the second part they leil the tracks pinch the packaging material between them and, by means of the element (56) that is movable relative to them, cut through while at the same time the perforation elements (74) too. apply a perforation pattern (150,154) to both sides of the cut, 009817/0125 - 22 - . ■. '.. SAD ORIGINAL 12. Device according to 10 or 11, characterized in that that the element for cutting through the building is a hot wire (56), which when cutting through at the same time the "two webs of Verpadongsmaterials together welded and so the back band of a preceding pack and the front edge of the next pack forms in one operation. 13. The device according to claim 10 or one of the following Claims, characterized in that the perforation elements (74) have teeth (76) which overlie the bottom surface of the associated Klesnmstangenpaares (52,54) protrude and with attached to the other pair of clamping rods (78,80), easily penetrable bodies (82) cooperate in such a way that the webs of packaging material therebetween be held in place before the clamping bars pinch the webs. 14. The device according to claim 9 or one of the following claims, characterized by a front of the work area perforating wheel (26) arranged on at least one path of the packaging material and having a perforation pattern (152) attaches in the longitudinal direction of the web. 009817/0125 _QAn BATH ORIGINAL 15. Device according to one of claims 9 to 14 »characterized by hot wires (34) held retractably at the side edges of the webs for welding the Long sides of the webs which are arranged in front of / the station (36) for closing the front and rear edges and the drive (123) of which is controlled by two scanning devices (18, 38) for putting on and taking off. 009817/0125 BATH SW blank page