EP2712523B1 - Wicket bag dispenser and method for dispensing wicket bags - Google Patents
Wicket bag dispenser and method for dispensing wicket bags Download PDFInfo
- Publication number
- EP2712523B1 EP2712523B1 EP12186087.8A EP12186087A EP2712523B1 EP 2712523 B1 EP2712523 B1 EP 2712523B1 EP 12186087 A EP12186087 A EP 12186087A EP 2712523 B1 EP2712523 B1 EP 2712523B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spool
- wicket
- bag
- head
- spool head
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 238000005429 filling process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920002457 flexible plastic Polymers 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
- B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
- B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
- B65B43/14—Feeding individual bags or carton blanks from piles or magazines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Description
- The present invention relates to a wicket bag dispenser and a method for transferring wicket bags from a wicket bag dispenser to the loading station of a packing machine.
- In industry, manufactured and assembled products are often packaged into pre-formed flexible plastic bags. Examples of products typically packaged in this way include consumer products such as food products and paper products, such as baby diapers, feminine hygiene products, and the like.
-
US 3,918,589, issued on November 11th 1975 , discloses a system of empty bags provided in stacks in a dispenser called a wicket. Each bag in the stack comprises wicket holes. The packaging bag dispenser comprises a platen and a pair of wicket supports mounted thereon, the supports being disposed to mount the stack of bags to be dispensed, and to hold the wicket-holed portions of the stacked bags. - In use the wicket bag dispensers, filled with stacks of empty bags, are transported into a loading station of a bag filling machine, for example by means of a bag in-feed conveyor. Articles of manufacture are also transported to the loading station of the bag filling machine. The empty bags are conveyed, one-by-one, from the wicket into the loading station, where each bag is opened, and the articles of manufacture are loaded into the opened bag. Subsequently the filled bag is generally transported away from the loading station so that other operations can be performed, such as closing, sealing and trimming the bag.
- When all of the bags from the wicket bag dispenser have been removed and filled in this way, the empty dispenser is transported away from the loading station to be replaced by a fresh stack of empty bags on the next wicket bag dispenser.
- The present invention relates, in particular, to the design and function of the wicket spools, i.e. the wicket supports, upon which the empty flexible bags are mounted in the wicket bag dispenser.
- As the empty bags are conveyed, one-by-one, as described above from the wicket to the loading station of the machine, the apertures in the bag, i.e. the wicket holes, must pass over the free end of the wicket spools and onto correspondingly positioned holder pins in the loading station. The holder pins hold the bag in the correct position during the loading operation.
- In order to permit many wicket bag dispensers to be transported into the loading station in succession, each time the previous wicket bag dispenser becomes empty, any interference between the top of the wicket spools and the end of the holder pins must be avoided. Given normal tolerances, therefore, when each new wicket is moved into position at the loading station, there remains a small gap between the free end of the wicket spools and the end of the holder pins. Typically this gap is of the order of 2mm.
- A problem arises in the manufacturing process if a bag is not accurately and completely transferred from the spool on to the holder pin. The bag can slip through the small gap between the free end of the spool and the holder pin with the result that the bag filling process fails leading to scrap of products.
- The present invention addresses this problem.
- In a first aspect the present invention relates to a wicket bag dispenser for holding flexible bags, suitable for transferring the flexible bags into the loading station of a bag filling machine, wherein the wicket bag dispenser comprises a stack of flexible bags, each bag having at least one aperture, and at least one wicket spool positioned through the apertures, wherein the wicket spool has an free end, the free end comprising a spool head, so that each flexible bag from the stack of flexible bags is conveyed along the spool in order to transfer to the loading station.
- In a second aspect the present invention relates to an apparatus comprising interacting wicket bag dispenser and holder pin, wherein the wicket bag dispenser comprises at least one wicket spool which is substantially axially aligned with at least one holder pin at the loading station of a bag filling machine, and further comprising a spool head between the wicket spool and the holder pin, so that flexible bags transferred from a wicket bag dispenser comprising the wicket spool pass over the spool head and onto the holder pin.
- The present invention still further relates to a method of transferring flexible bags from a wicket bag dispenser to the loading station of a bag filling machine, wherein the wicket bag dispenser comprises at least one wicket spool, and a stack of flexible bags, each bag having at least one aperture through which the wicket spool is positioned, the method comprising the steps of:
- conveying a bag along the wicket spool towards the free end of the wicket spool; and
- transferring the bag over a spool head positioned at the free end of the wicket spool; so that each flexible bag from the stack of flexible bags passes over the spool head in order to transfer to the loading station.
- According to the present invention the spool head is free to move in an axial direction relative to the wicket spool. The spool head is free to move between a first position and a second position, without separating from the wicket spool. Preferably the outer circumferential dimensions of the spool head are greater than the largest diameter of the wicket spool, for example, at least part of the spool head may be frustro-conical in shape. The spool head may also comprise a shaft seated within a hollow axis of the wicket spool. Preferably interacting stops on the shaft of the spool head and on the wicket spool limit the distance of travel of the spool head in the axial direction relative to the wicket spool, between the first position and the second position, provided a predetermined force is not exceeded.
-
-
Figure 1 is a cross-sectional view through a wicket spool of the prior art. -
Figure 2 is a cross-sectional view through a wicket spool of the present invention, showing the spool body and spool head separated. -
Figure 3A is a cross-sectional view through the wicket spool of the present invention showing the spool head in a lower position. -
Figure 3B is an enlarged cross-section of a part ofFigure 3A . -
Figure 4A is a cross-sectional view through the wicket spool of the present invention showing the spool head in an upper position. -
Figure 4B is an enlarged cross-section of a part ofFigure 4A . - Articles of manufacture are transported along a conveyor, in the machine direction, to the bag filling machine located at the loading station of the machine. Typically the bag filling machine comprises a bag in-feed conveyor. Wickets of empty bags are loaded onto the bag in-feed conveyor. The bag in-feed conveyor transports the wickets into the bag filling machine, typically by transporting the wickets in the cross machine direction, i.e. substantially perpendicular to the machine direction.
- Each wicket bag dispenser comprises a stack of flexible bags, each bag having at least one aperture, and at least one wicket spool positioned through the apertures. Typically wicket bag dispensers comprise two wicket spools positioned through a pair of apertures in each of the flexible bags, as shown in
US 3,918,589 . - There will typically be a small gap, of the order of from 1 mm to 5 mm, typically about 2 mm, between the top of wicket spool and the lower end of the holder pin of the loading station. This small gap is required in order to avoid interference between the spool head and the holder pin when the next wicket bag dispenser is transported into the loading station of the bag filling machine in cross machine direction.
- A problem arises if the bag is not accurately and completely transferred onto the holder pin(s). The bag can slip through the gap between the top of the spool and the holder pin(s) with the consequence that the bag filling process fails, leading to scrap of products. High rates of scrap are uneconomical, and should be avoided.
- Most commonly a wicket bag dispenser comprises two wicket spools mounted on a platen a fixed distance apart.
FIG 1 shows an example of acurrent wicket spool 1, which is used in the industry for transport and supply of empty flexible bags. Thespool 1 comprises two main components: aspool body 3, and aspool head 4. Thespool body 3 and thespool head 4 may be completely separated from each other in order to load the empty bags on thespool body 3, and then re-assembled in order to close thespool 1 and to prevent bags from becoming detached from thespool 1 until the time of use. The bags are perforated with apertures, the diameter of which is larger than the diameter of thespool body 3, but preferably slightly smaller than the greatest diameter of thespool head 4. Preferably the plastic film adjacent to the aperture contains a line of weakness, such as a score line or perforation. -
FIG 2 shows an example of awicket spool 11 according to the present invention. As the flexible bag is lifted from the stack, the aperture passes along thespool body 13 and catches thespool head 14, thus lifting thespool head 14 and moving it axially, relative to thespool body 13. Thespool head 14 is lifted from its first position to a second position. The flexibility of the plastic film, and/or partial tearing along the line of weakness, then allows thespool head 14 to pass through the aperture so that the bag may be transferred onto holder pins of the loading station. Preferably, thespool head 14 comes into contact with theholder pin 15 thereby eliminating any gap between the free end of thespool head 14 and the end of theholder pin 15. The flexible bag is conveyed over thespool head 14 and onto theholder pin 15, and thespool head 14 is then free to return to its first position. - Preferably the first position of the
spool head 14 is a lower position, and the second position of thespool head 14 is an upper position. In this case, thespool head 14 returns freely from its second position to its first position under gravity. However, other arrangements can be envisaged in which thespool head 14 is biased to return from its second position to its first position by force other than gravity, for example, thespool head 14 may be spring-loaded. - The loading station of the bag filling machine comprises holder pins 15 spaced apart and corresponding to the spacing of the
spools 11. At the loading station, bags are transferred, one-by one, from thespool body 13, over thespool head 14, and onto theholder pin 15 as described above. In order to open each bag, and maintain the bag open, bags are transferred such that the bags are held by the apertures on theholder pin 15, and remain held during the bag filling process. -
FIGS 3A and FIG 4A show the embodiment of the wicket spool ofFIG 2 in its lower and upper positions respectively. Thespool head 14 is inserted in thespool body 13 and fulfills the function of closing the spool for transport and supply. - In
FIG 3A and 3B , thespool head 14 is shown in its lower position and enables a smooth wicket change, without any risk of interference between the free end of thespool head 14 and theholder pin 15. - In
FIGS 4A and 4B , thespool head 14 is shown on its upper position, which occurs each time a bag is lifted up. The spool head is shown coming in contact with theholder pin 15. Thismovable spool head 14 reduces or preferably eliminates the gap betweenspool head 14 andpin holder 15. - As can be seen from
FIG 4B , thespool body 13 has aninternal ring 16 andspool head 14 has anouter ring 17 in order to retain thespool head 13 during transport and ensuringspool head 14 cannot be separated fromspool body 13 with less than predetermined force, for example the predetermined force may be 50N or greater. - According to the present invention the
spool head 14 is free to move in an axial direction relative to the spool, between a first position and a second position, and thespool head 14 does so under a comparably low amount of force, namely the force transferred from the bag as the bag apertures pass over and around thespool head 14. Thespool head 14 may be completely removed from thespool body 13, by pulling thespool body 13 beyond the second position, but only when thespool head 14 is subject to a comparably high amount of force, for example 50N or greater.
Claims (12)
- A wicket bag dispenser for holding flexible bags, suitable for transferring the flexible bags into the loading station of a bag filling machine, wherein the wicket bag dispenser comprises a stack of flexible bags, each bag having at least one aperture, and at least one wicket spool (13) positioned through the aperture, wherein the wicket spool (13) has a free end, the free end comprising a spool head (14), so that each flexible bag from the stack of flexible bags passes over the spool in order to transfer to the loading station, characterized in that the spool head (14) is free to move in an axial direction relative to the spool (13), between a first position and a second position.
- The wicket bag dispenser according to claim 1 wherein the outer circumferential dimensions of the spool head (14) are greater than the largest diameter of the wicket spool (13).
- The wicket bag dispenser according to claim 2 wherein at least part of the spool head (14) has a frustro-conical form.
- The wicket bag dispenser according to claim 1 wherein the spool head (14) comprises a shaft, and wherein the shaft is seated within a hollow axis of the wicket spool (13).
- The wicket bag dispenser according to claim 4 wherein interacting stops (16, 17) on the shaft of the spool head (14) and on the wicket spool (13) limit the distance of travel of the spool head (14) relative to the wicket spool (13), in the axial direction, provided a predetermined force is not exceeded.
- The wicket bag dispenser according to claim 5 wherein the predetermined force required to remove the spool head (14) from the wicket spool is 50 N or greater
- An apparatus comprising interacting wicket bag dispenser and holder pin (15), wherein the wicket bag dispenser comprises at least one wicket spool (13) which is substantially axially aligned with at least one holder pin (15) at the loading station of a bag filling machine, and further comprising a spool head (14) between the wicket spool (13) and the holder pin (15), so that flexible bags transferred from a wicket bag dispenser comprising the wicket spool (13) pass over the spool head (14) and onto the holder pin (15), characterized in that the spool head (14) is free to move in an axial direction relative to the wicket spool (13), between a first position and a second position.
- The apparatus according to claim 7 wherein the spool head (14) is free to move into contact with the holder pin (15) as the flexible bag passes over the spool head (14), thereby eliminating any gap between the spool (13), the spool head (14) and the holder pin (15) at the point at which the flexible bag transfers from the spool (13) to the holder pin (15).
- The apparatus according to either of claims 7 or 8 wherein the outer circumferential dimensions of the spool head (14) are greater than the largest diameter of the wicket spool (13).
- A method of transferring flexible bags from a wicket bag dispenser to the loading station of a bag filling machine, wherein the wicket bag dispenser comprises at least one wicket spool (13), and a stack of flexible bags, each bag having at least one aperture through which the wicket spool is positioned, the method comprising the steps of:conveying a bag along the wicket spool (13) towards the free end of the wicket spool (13); andtransferring the bag over a spool head (14) positioned at the free end of the wicket spool (13);so that each flexible bag from the stack of flexible bags passes over the spool head (14) in order to transfer to the loading station, characterized in that the spool head (14) moves in an axial direction relative to the wicket spool (13), as the bag is transferred over the spool head (14).
- The method according to claim 10 wherein the outer circumferential dimensions of the spool head are greater than the largest diameter of the wicket spool, and wherein interacting stops (16, 17) on the shaft of the spool head (14) and on wicket spool (13) limit the distance of travel of the spool head (14) relative to the wicket spool (13), in the axial direction..
- The method according to claim 11 wherein the spool head (14) moves into contact with the holder pin (15) as the flexible bag passes over the spool, thereby eliminating any gap between the wicket spool (13), the spool head (14) and the holder pin (15) at the point at which the flexible bag transfers from the wicket spool (13) to the holder pin (15).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12186087.8A EP2712523B1 (en) | 2012-09-26 | 2012-09-26 | Wicket bag dispenser and method for dispensing wicket bags |
JP2015533275A JP6147859B2 (en) | 2012-09-26 | 2013-09-24 | Wicket bag dispenser and method for dispensing wicket bags |
CN201380049363.8A CN104661569A (en) | 2012-09-26 | 2013-09-24 | Wicket bag dispenser and method for despensing wicket bags |
PCT/US2013/061409 WO2014052315A1 (en) | 2012-09-26 | 2013-09-24 | Wicket bag dispenser and method for despensing wicket bags |
US14/037,535 US20140083054A1 (en) | 2012-09-26 | 2013-09-26 | Wicket Bag Dispenser and Method for Dispensing Wicket Bags |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12186087.8A EP2712523B1 (en) | 2012-09-26 | 2012-09-26 | Wicket bag dispenser and method for dispensing wicket bags |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2712523A1 EP2712523A1 (en) | 2014-04-02 |
EP2712523B1 true EP2712523B1 (en) | 2018-10-24 |
Family
ID=46939649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12186087.8A Active EP2712523B1 (en) | 2012-09-26 | 2012-09-26 | Wicket bag dispenser and method for dispensing wicket bags |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140083054A1 (en) |
EP (1) | EP2712523B1 (en) |
JP (1) | JP6147859B2 (en) |
CN (1) | CN104661569A (en) |
WO (1) | WO2014052315A1 (en) |
Family Cites Families (23)
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US2843988A (en) * | 1955-01-10 | 1958-07-22 | Millprint Inc | Apparatus for opening bags |
US2872067A (en) * | 1956-05-14 | 1959-02-03 | William J C Gessner | Automatic ejection ash tray |
US3431704A (en) * | 1967-04-20 | 1969-03-11 | Egon Gunnar Smedlund | Supporting and moving device for refuse sacks |
FI47309C (en) * | 1971-06-14 | 1973-11-12 | Suominen | Device for tying and hanging plastic bags or the like for use. |
BE791600A (en) * | 1971-11-17 | 1973-03-16 | Wang Herman | APPLIANCE FOR DISTRIBUTION AND MAINTAINING BAGS AND USED BAGS |
US3827569A (en) * | 1973-05-11 | 1974-08-06 | G Canning | Pegboard display rack |
US4583349A (en) * | 1973-11-14 | 1986-04-22 | Bengt Lundin Ab | Method of storing handle bags |
US3918589A (en) | 1974-11-04 | 1975-11-11 | Union Carbide Corp | Pivoted wicket bag opening dispenser |
US4451249A (en) * | 1980-09-26 | 1984-05-29 | Debin Rene F | Manufacture of thermoplastic bags |
US4541226A (en) * | 1982-12-29 | 1985-09-17 | Union Carbide Corporation | Packaging method and apparatus |
US4535508A (en) * | 1984-03-30 | 1985-08-20 | Union Carbide Corporation | Expandable casing sizing mechanism and method |
US5029728A (en) * | 1989-12-22 | 1991-07-09 | W. R. Grace & Co.-Conn. | Method and apparatus for dispensing packaging bags |
FR2745269B1 (en) * | 1996-02-28 | 1998-06-19 | Platex Sa | FUSETTE FOR PACKAGING PLASTIC BAGS |
FR2746378B1 (en) * | 1996-03-22 | 1998-06-12 | Pansac France | DEVICE FOR ASSEMBLING BAGS INTO A BAG PACK |
US20020198498A1 (en) * | 2002-07-18 | 2002-12-26 | David Porat | Syringe for high-viscosity fluids |
CN2647098Y (en) * | 2003-08-22 | 2004-10-13 | 郭裕政 | Combined joint for chain type ornament |
CN100460285C (en) * | 2003-08-27 | 2009-02-11 | 株式会社村春制作所 | Article storage device |
NL1024329C1 (en) * | 2003-09-19 | 2005-03-22 | Gerrit Jan Nieuwenhuis | The support pin has a packet bundle of plastic sheet items suspended from it and comprises elongated container body |
NL1026150C2 (en) * | 2004-05-10 | 2005-11-15 | Arie Van Der Knijff | Device for supplying and / or filling bags. |
CN201037052Y (en) * | 2007-04-10 | 2008-03-19 | 汕头市金海湾包装机械有限公司 | Bag fetching mechanism for packer |
CN201119497Y (en) * | 2007-09-04 | 2008-09-24 | 黄禄财 | Sun-rain umbrella |
CA2639729A1 (en) * | 2007-09-27 | 2009-03-27 | Tyco Healthcare Group Lp | Multiple stage fluid delivery device and method of use |
CN202358351U (en) * | 2011-12-05 | 2012-08-01 | 安庆市恒昌机械制造有限责任公司 | Prefabricated bag conveying and automatic exchange mechanism |
-
2012
- 2012-09-26 EP EP12186087.8A patent/EP2712523B1/en active Active
-
2013
- 2013-09-24 JP JP2015533275A patent/JP6147859B2/en not_active Expired - Fee Related
- 2013-09-24 WO PCT/US2013/061409 patent/WO2014052315A1/en active Application Filing
- 2013-09-24 CN CN201380049363.8A patent/CN104661569A/en active Pending
- 2013-09-26 US US14/037,535 patent/US20140083054A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
US20140083054A1 (en) | 2014-03-27 |
WO2014052315A1 (en) | 2014-04-03 |
JP2015536877A (en) | 2015-12-24 |
JP6147859B2 (en) | 2017-06-14 |
CN104661569A (en) | 2015-05-27 |
EP2712523A1 (en) | 2014-04-02 |
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