EP0798211A1 - Method and device for packaging goods in a packaging bag with a reclosable flap - Google Patents

Method and device for packaging goods in a packaging bag with a reclosable flap Download PDF

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Publication number
EP0798211A1
EP0798211A1 EP19970100750 EP97100750A EP0798211A1 EP 0798211 A1 EP0798211 A1 EP 0798211A1 EP 19970100750 EP19970100750 EP 19970100750 EP 97100750 A EP97100750 A EP 97100750A EP 0798211 A1 EP0798211 A1 EP 0798211A1
Authority
EP
European Patent Office
Prior art keywords
bag
device
flap
packaging bag
packaging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19970100750
Other languages
German (de)
French (fr)
Inventor
Horst Heimann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hugo Beck and Co KG Verpackungs-Maschinenbau GmbH
Original Assignee
Hugo Beck and Co KG Verpackungs-Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE1996111740 priority Critical patent/DE19611740C2/en
Priority to DE19611740 priority
Application filed by Hugo Beck and Co KG Verpackungs-Maschinenbau GmbH filed Critical Hugo Beck and Co KG Verpackungs-Maschinenbau GmbH
Publication of EP0798211A1 publication Critical patent/EP0798211A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00Closing containers or receptacles after filling
    • B65B7/02Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks

Abstract

Method and device for packaging packaged goods in a packaging bag, the direction of transport of the bag being rotated after welding so that it points with the opened bag flap lying on the transport path in the direction of transport. The bag flap (18) is folded over by blowing up and holding the free edge of the bag flap. The bag flap is held on the free edge and folded over on the top as the packaging bag moves on. The method and the device ensure a problem-free and tight wrinkle-free folding during the passage, while at the same time ensuring that the glue is adequately vented. <IMAGE>

Description

  • The invention relates to a method for producing a packaging bag according to the preamble of claim 1 and an apparatus for performing this method.
  • Packaging bags, which enclose a packaged product, should be provided with a closure which enables the packaging bag to be opened and closed repeatedly. The packaging bag should always be closed dust-tight after closing.
  • DE 29 39 791 C2 discloses a method and a device in which the packaging bag is produced from a lower film, an upper film and a film strip forming the flap. The aim of this known method and the device is to provide a possibility of producing a packaging bag from continuous film webs, any folding over of the bag flap being avoided, since this is regarded as disadvantageous in known arrangements, particularly in the case of packaging bags with a large width. The disadvantage of this known method is that three film webs are required and the packaged goods are fully welded in, which makes it necessary to tear open the side weld. In addition, a waste strip is created. Intermittent operation reduces the clock performance.
  • It is also known to seal a packaging bag formed from a lower film and an upper film, in which the lower film and upper film are connected to one another along a substantially U-shaped weld seam, in that a tab is formed on the lower film and placed on the upper film becomes. To attach the tab, it is glued to the top film. Furthermore, the flap of the bottom film folded over onto the top film can not only be glued to the top film in the vicinity of its front edge, but at the same time also a welding of the folded over tab to the top film and possibly also the bottom film. This side welding is not desirable in terms of opening and resealability. In addition, these known methods require a relatively high level of design complexity, in particular because the packaging bags with the open tab lie transversely to the transport direction, so that fold-free folding without stopping the transport device and firm insertion of the packaging goods into the packaging bag is difficult to achieve.
  • A packaging machine is known from US Pat. No. 2,673,430, in which the material is transported by means of suction belts for conveying the material. For the reversal of direction by 90 °, the packaged goods are accelerated for separation and then transported at a somewhat higher speed on a conveyor belt running transversely to the first conveyor bank.
  • US Pat. No. 2,037,561 discloses a mechanism for folding over a tab that is leading in the conveying direction, in which the tab is blown up above a free space by means of a nozzle and is gripped by a suction nozzle.
  • CH 146 142 describes a method for folding tabs running ahead in the transport direction, the protruding tab being deflected transversely to the direction of movement and then being carried along in the direction of movement by the object moving on and being folded over onto the object.
  • The invention is based on the object of specifying a possibility for packaging packaged goods in a packaging bag, which simplifies the manufacturing process and at the same time allows fold-free folding of the flap at high speed.
  • This object is achieved by a method with the features of claim 1 and a device with the features of the device claim. Further advantageous embodiments can be found in the respective subclaims which refer back to this.
  • The invention has the advantages that packaging bags with pouch flaps of different lengths can also be closed without creases, the packaged goods still being pushed into the packaging bag during the closure, and tight packaging in which the packaged goods have no freedom of movement is thereby realized. Another advantage is that sufficient time can be provided between the application of the adhesive and the closing of the bag flap if this is necessary for the adhesive to be vented.
  • By rotating the transport direction of the packaging bag by 90 °, so that the packaging bag with the bag flap points in the transport direction, the bag flap can simply be glued to the top film. Before turning the transport direction, the transport speed is increased to provide a sufficient distance for the turning process.
  • The transport speed is advantageously increased in a ratio of 1: 1.5.
  • According to a preferred embodiment of the method, the packaging bag is fixed on a conveyor belt, preferably by means of a vacuum, before the bag flap is folded down, so that after the bag flap is subsequently folded up, the latter is kept taut relative to the packaging bag, likewise preferably by means of a vacuum, and consequently by the further movement of the Packing bag, the packaged goods are completely pushed into the packaging bag. The bag flap is then folded over onto the top film under tension. According to a particularly preferred embodiment, the bag flap is blown up over the entire width of the bag flap, which simplifies the design effort.
  • After folding, the bag flap is advantageously ironed on in order to ensure secure and firm adhesion.
  • The device designed according to the invention for carrying out the method comprises a transport path arranged after the welding station with an acceleration path, a feed path thereafter, which runs essentially transversely to the acceleration path, to a closure device for the packaging bag and a discharge path for the closed packaging bag from the closure device. The conveyor track can be a driven roller conveyor or a conveyor belt. The rotation of the packaging bag is realized by the feed path running essentially transversely to the acceleration path. The angle between the two webs is expediently 90 °, but it is also possible to correct and optimally align the packaging bag by means of guide devices. The feed path is formed at least in the area adjacent to the closure device as a perforated conveyor belt, so by means of a below the Conveyor belt arranged suction device, the underside of the packaging bag can be fixed on the conveyor belt. Following the perforated conveyor belt, there is a space in the closure device which runs transversely to the transport direction and through which a device for folding up the bag flap causes the flip-up process before the packaging bag reaches the subsequent discharge path. The bag flap can be folded up mechanically or pneumatically. The folded-up bag flap is held on the free edge by means of a holding device and folded over as the packaging bag moves on.
  • According to a preferred embodiment of the device, the acceleration path is designed as a conveyor belt and the transfer from the acceleration path to the feed path takes place via a peeling edge arranged on the acceleration path. At the same time, the transport speed of the feed path is increased compared to the acceleration path. This ensures a safe and trouble-free transfer from one web to the other while simultaneously rotating the packaging bag by 90 ° and with a sufficient distance between the packaging bags. The peeling edge prevents the bag flap from sticking when it is deflected at the end of the conveyor belt.
  • According to a particularly preferred embodiment, the bag flaps are folded up by a blowing device, the blowing direction and strength can be varied in order to be able to deal with different materials or widths. The blowing device advantageously has individual nozzles which can be switched off according to the product width. This can also be done, for example, by closing individual openings in a blowpipe. The bag flap is thus folded up using simple structural measures.
  • The folded-up pouch flap is preferably held on the free edge by means of a suction device how the shape of a suction tube can be designed, the angle between the radial openings and the folded-up bag flap can be varied to suit the requirements. This suction force of this suction device and also of the suction device for fixing the packaging bag on the belt can also be set for different products. After the bag flap has been folded over, it is released by the holding device holding the bag flap. At the same time, the fixing of the packaging bag to the feed belt can also be ended.
  • The invention is explained in more detail below on the basis of a preferred exemplary embodiment in conjunction with the accompanying drawings. They represent:
  • Figure 1
    a schematic representation of the top view of the transport route of the packaging bag;
    Figure 2
    is a schematic side view of the transition point between the acceleration belt and the feed belt; and
    Figure 3
    a schematic side view of the closure device.
  • In FIG. 1, a shaped shoulder 1 is indicated schematically, by means of which a half-tube is folded with a lateral offset of the lower film web and is guided together with the packaged goods through a first conveyor belt 2 to a welding device 3. The separation of the film webs and the welding along the lateral edges running transversely to the transport direction are carried out in the usual manner known to the person skilled in the art. In front of the welding device 3, the glue is applied to the top film by means of a generally known glue application device 4. After leaving the welding device 3, the open packaging bag 8 with the glue track 23 and the bag flap 18 arranged longitudinally to the transport direction reaches an acceleration belt 5 which measures the speed of the Packaging bags increased in a ratio of 1: 1.5. The length of the acceleration band 5 is approximately 1 m in the exemplary embodiment. At the end of the acceleration belt 5, the packaging bag passes via a peeling edge 6 onto an underlying feed belt 7 which is offset by 90 ° and whose speed is increased again by approximately 1: 1.5 compared to the acceleration belt 5. The open packaging bag 8 now lies with the bag flap 18 transversely to the transport direction. Via the feed belt 7, the packaging bags 8 reach the area of a closure device 9, which is explained in more detail in connection with FIG. 3 and which folds over the bag flap 18 and closes on the upper side of the upper film. For closing, the feed belt 7 is provided with a conveyor belt 16 with perforation 24. The closed packaging bag 8 leaves the closure device 9 via a discharge belt 10.
  • FIG. 2 shows the structure of the knife edge 6 on the acceleration belt 5. The acceleration belt 5 projects beyond the feed belt 7 at its end, the diameter of the deflection roller 11 being approximately 1 cm in order to ensure a clean detachment of the packaging bag from the acceleration belt 5. As a result, the packaging bag falls securely onto the feed belt 7, which transports it at a higher speed, so that the rotated packaging bag is moved out of the region 12 (FIG. 1) adjacent to the end of the acceleration belt 5 before the next packaging bag arrives.
  • Figure 3 shows a schematic representation of the closure device 9, which comprises a blowing device 13 arranged below the free space 14, consisting of a tube with individual openings and a suction tube 15 arranged above the packaging bag. Both the blowing device 13 and the suction pipe 15 are movable, in accordance with the arrow directions shown in the figure, in order to adapt the blowing or suction direction to the requirements. The respective pressure can also be set. The height of the suction pipe 15 above the discharge belt 10 is according to the Packed goods thickness is also variable so that it is always just above the packaged goods. The conveyor belt 16 of the feed belt 7 is perforated, so that the packaging bag 8 is fixed on the top of the conveyor belt 16 by means of a suction bar 17 arranged below the conveyor belt 16. The bag flap 18 first passes through the free space 14 during further transport and is folded upwards by the blowing device 13. As a result of the further movement, the bag flap 18 is sucked in and held in place by the suction tube 15 via openings 26. The bag flap 18 is thus tightened and the packaged goods are pushed fully into the packaging bag 8 during further movement. As a result of the further advance, the bag flap 18 is folded over onto the upper side of the upper film, the suction tube 15 being rotated accordingly. After the bag flap 18 has been completely folded, it is released from the suction pipe 15. The release of the packaging bag by the squeegee 17 is inevitably unnecessary by the further transport of the packaging bag on the discharge belt 10. For pressing and smoothing the bag flap 18 on the surface there is then a pressure roller 20 which is resiliently and vertically adjustable.
  • The feed belt 7 and the discharge belt 10 are also formed in the area of the free space 14 as peeling edges 19 in order to ensure trouble-free function and to be able to apply the principle to small product dimensions. For this purpose, the conveyor belts 16 and 25 are guided around deflecting rollers 21 and 22 with a diameter of approximately 1 cm. Depending on the structure of the blowing nozzles as individual blowing nozzles or in a blowing tube with radial openings, either the individual nozzles can be controlled or closed with regard to the blowing pressure in order to adapt the blowing nozzles to the width of the respective packaging bag.
  • The device described allows the bag flap to be folded over during continuous operation. This ensures high performance. In addition, the folding process is due to the simple construction not susceptible to interference, whereby a fold-free and tight folding of the bag flap is guaranteed. The packaged goods are pushed in again when they are folded over, which allows tight packaging. Furthermore, a long distance is guaranteed for the glue to air out.

Claims (14)

  1. Process for packaging packaged goods in a packaging bag with an upper film and a lower film welded laterally to the upper film and a bag flap formed on the lower film, which is placed on and bonded to the upper film, the packaging material consisting of the upper film and laterally projecting lower film with the packaged goods is brought together, conveyed together across the bag opening with a flat bag flap and the open packaging bag is formed by welding the two foils at the side edges, the transport speed then being increased and the transport direction of the packaging bag being rotated by 90 °, so that the packaging bag with the bag flap points in the direction of transport and then the bag flap is folded onto the top film to close the packaging bag.
  2. Method according to Claim 1, characterized in that the transport speed is increased in the ratio 1: 1.5 before the direction of transport is rotated.
  3. Method according to Claim 1 or 2, characterized in that the packaging bag is fixed on a conveyor belt, preferably by means of a vacuum, before the bag flap is folded over.
  4. A method according to claim 3, characterized in that the bag flap is folded up and held at its free end, preferably by means of a vacuum, while the packaging bag moves on with the conveyor belt, and the bag flap is placed on the top of the upper film under tension and released during further movement becomes.
  5. A method according to claim 4, characterized in that the bag flap is blown up from below.
  6. A method according to claim 4, characterized in that the bag flap is then ironed on.
  7. Device for carrying out the method according to claim 1, with a device for feeding the packaging material and the packaged goods, a device for merging the packaging material with the packaged goods, a transport path around the stacked films and the packaged goods in between through a welding station in which the films are welded on the side edges, to be conveyed, a transport path arranged after the welding station (3) having an acceleration path (5) and a feed path (7) running thereafter substantially transversely to the acceleration path (5) to a closure device (9) for the packaging bag (8) and a discharge path (10) for the closed packaging bag from the closure device (9), the feed path (7) being designed at least in the area adjacent to the closure device (9) as a perforated conveyor belt (16) through which the Bottom of the packaging bag (8) mitt els a suction device (17) on the conveyor belt (16) can be fixed, and the closure device (9) is a device (13) for folding up the bag flap (18), which extends from below transversely to the transport direction via a space (14) between the feed path (7) and discharge path (10) located bag flap (18) folds up, and includes a holding device (15) for holding the free edge and folding the bag flap (18) during the further movement.
  8. Apparatus according to claim 7, characterized in that the transport speed of the feed path (7) is higher than that of the acceleration path (5) and the acceleration path (5) is designed as a conveyor belt with a peeling edge (6) arranged at the transfer point to the feed path (7) is.
  9. Apparatus according to claim 7 or 8, characterized in that the suction force of the suction device (17) is adjustable.
  10. Device according to one of the preceding claims 7 to 9, characterized in that at least the feed path (7) in the region of the free space (14) is designed as a peeling edge (19).
  11. Device according to one of the preceding claims 7 to 10, characterized in that the device (13) for folding up the bag flap (18) comprises a blowing device for blowing up, the blowing direction of the blowing device upwards and / or the blowing pressure preferably being adjustable.
  12. Apparatus according to claim 11 , characterized in that the blowing device (13) has nozzles which can preferably be controlled according to the product width.
  13. Device according to one of the preceding claims 7 to 12, characterized in that the holding device (15) comprises a suction tube, which is preferably adjustable in height, arranged at a distance just above the product height and whose suction force and preferably suction direction can be varied.
  14. Device according to one of the preceding claims 7 to 13, characterized in that after the holding device (15) a pressure roller mounted in a resilient and height-adjustable manner (20) for ironing the bag flap on the top of the packaging bag is provided.
EP19970100750 1996-03-25 1997-01-18 Method and device for packaging goods in a packaging bag with a reclosable flap Withdrawn EP0798211A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1996111740 DE19611740C2 (en) 1996-03-25 1996-03-25 Method and device for packaging packaged goods in a packaging bag with a reclosable flap
DE19611740 1996-03-25

Publications (1)

Publication Number Publication Date
EP0798211A1 true EP0798211A1 (en) 1997-10-01

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ID=7789348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970100750 Withdrawn EP0798211A1 (en) 1996-03-25 1997-01-18 Method and device for packaging goods in a packaging bag with a reclosable flap

Country Status (5)

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EP (1) EP0798211A1 (en)
JP (1) JPH101101A (en)
KR (1) KR970065351A (en)
DE (1) DE19611740C2 (en)
ID (1) ID16258A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345875B (en) * 1999-05-25 2001-05-30 Uponor Ltd Pipe preparing tool V
AT15695U1 (en) * 2016-10-14 2018-04-15 Starlinger & Co Gmbh Apparatus and method for closing an open end of a hose body
KR101852099B1 (en) * 2017-09-28 2018-06-07 주식회사 선우 Banner cutting and front tip folding and fusing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH146142A (en) 1930-02-18 1931-03-31 Robert Williams Harrison Method and apparatus for folding the ends of wrapped around objects cases.
US2037561A (en) 1934-11-01 1936-04-14 Veldown Company Inc Tab end folding mechanism
US2673430A (en) 1949-06-18 1954-03-30 Crystal Tissue Company Wrapping and packaging machine
DE2939791A1 (en) * 1979-10-01 1981-04-02 Beck & Co Packautomaten Foil packaging bag prodn. - has lower and upper foil enclosing goods, with fold over flap with detachable adhesive connection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH146142A (en) 1930-02-18 1931-03-31 Robert Williams Harrison Method and apparatus for folding the ends of wrapped around objects cases.
US2037561A (en) 1934-11-01 1936-04-14 Veldown Company Inc Tab end folding mechanism
US2673430A (en) 1949-06-18 1954-03-30 Crystal Tissue Company Wrapping and packaging machine
DE2939791A1 (en) * 1979-10-01 1981-04-02 Beck & Co Packautomaten Foil packaging bag prodn. - has lower and upper foil enclosing goods, with fold over flap with detachable adhesive connection
DE2939791C2 (en) 1979-10-01 1983-01-05 Beck & Co Packautomaten, 7440 Nuertingen, De

Also Published As

Publication number Publication date
DE19611740A1 (en) 1996-09-26
ID16258A (en) 1997-09-18
KR970065351A (en) 1997-10-13
JPH101101A (en) 1998-01-06
DE19611740C2 (en) 1997-02-06

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