EP0004749A2 - Appareil pour plier des sacs - Google Patents

Appareil pour plier des sacs Download PDF

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Publication number
EP0004749A2
EP0004749A2 EP79300514A EP79300514A EP0004749A2 EP 0004749 A2 EP0004749 A2 EP 0004749A2 EP 79300514 A EP79300514 A EP 79300514A EP 79300514 A EP79300514 A EP 79300514A EP 0004749 A2 EP0004749 A2 EP 0004749A2
Authority
EP
European Patent Office
Prior art keywords
bag
bags
sheets
feed direction
receiving device
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Withdrawn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
EP79300514A
Other languages
German (de)
English (en)
Other versions
EP0004749A3 (fr
Inventor
James Anthony Mcdonald
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Publication of EP0004749A2 publication Critical patent/EP0004749A2/fr
Publication of EP0004749A3 publication Critical patent/EP0004749A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/70—Article bending or stiffening arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/261—Folding sheets, blanks or webs involving transversely folding, i.e. along a line perpendicular to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles

Definitions

  • the present invention relates to a bag folding apparatus, and particularly to an apparatus for use in connection with the folding and packaging of bags made from a flimsy material, such as a plastics material.
  • plastics bags can be made of film forcing polymers such as polyethylene, polypropylene, and polyvinylchloride and the like and can be multilayered. In comparison to the paper or cellulosic counterparts the plastics bags have substantially poor structural rigidity, are thinner, and have much lower surface friction characteristics.
  • plastics bags Generally, the manufacturing of plastics bags starts with a plastics film which is formed into separate bags and these bags are then folded and packed into boxes which will eventually be puchased by the consumers.
  • the plastics bag is formed and then discharged into a receiving region from which the final folding operation proceeds.
  • Each bag is discharged into the receiving region in a substantially flat state and slides into the region until a barrier generally referred to as a fence prevents further sliding of the bag.
  • a barrier generally referred to as a fence prevents further sliding of the bag.
  • an apparatus for use in connection with the folding of bags or sheets made from a flimsy material comprising feeding means operable for discharging bags or sheets successively in a feed direction with each bag or sheet having a plurality of corrugated regions having grooves in said feed direction and having undulations in the transverse direction, receiving means operable to receive the bags from the feeding means and to maintain in each bag or sheet fed thereto at least some of the corrugated regions at least until each of the bags stops its movement along the feed direction, and a fence in or adjacent the receiving means for stopping the movement of each of the bags or sheets along said feed direction.
  • the feeding means comprising a pair of shafts and a plurality of spaced tyres mounted on the shafts and positioned to cooperate with each other to provide the plurality of corrugated regions in each bag fed therethrough and to move that bag in the feed direction.
  • the receiving means preferably includes a plurality of upper rods and a plurality of lower rods which cooperate with each other to maintain in each of the bags at least some of the corrugated regions at least until each of the bags stops its movement along said feed direction.
  • Fig. 1 shows a complete system for producing folded and packaged bags from a roll of plastic film.
  • plastics film 10 in the form of a roll 11 is moved around a roller 12 into a bag making machine 13.
  • the plastics film 10 on the roll is prefolded longitudinally.
  • plastics film 10 could be supplied from an extruder and thereafter prefolded prior to entering the bag making machine 13.
  • the plastics film 10 can also be supplied from other known means such as from a roll without the film having a fold and prefolding the film prior to its entering the bag making machine 13.
  • the bag making machine 13 can be a Model 208 Polyethylene Bag Making Machine manufactured by G. T. Schjeldahl Company in combination with a Model Accu-Folder Folding Machine manufactured by FMC Corporation.
  • the machine 13 produces a bag 14.
  • the bag 14 is longitudinally folded with the crease being the leading edge.
  • the crease is usually not well defined due to the characteristics of the plastics film.
  • the bag 14 moves through a feeding means such as a corrugating roller 15 into a receiving means 16.
  • the bag 14 comes to rest in the receiving means 16 in a generally flat condition and thereafter is removed from below, such as shown by bag 17, by nip rollers 18 in combination with belts 19 for additional processing and packaging by apparatus 20.
  • bags can be moved by a conveying system 22 to corrugating rollers 15 into a plurality of upper rods 23 and a plurality of lower rods 24.
  • An adjusting system 21 allows the groups of rods to be moved vertically to obtain a predetermined spacing at a predetermined height. Each rod position within its group is adjustable.
  • Each of the corrugating rollers 15 comprises a drive shaft 25 and tyres 26.
  • each of the tyres 26 is an annular ring of an elastic material and each tyre 26 frictionally engages the respective shaft 25.
  • the material can be a plastics material such as polyurethane or a rubber-like material or the like.
  • the tyres 26 are grouped in clusters and serve to grip and remove bags from the conveying system 22 when the corrugating rollers 15 are driven. Each group of tyres 26 forms a corrugated region in a bag passing between the corrugating rollers 15.
  • corrugated region refers to a physical variation in the film as shown in Fig. 5 which shows four such "corrugated regions”.
  • the corrugated regions provide good structural rigidity to the bag so that when the leading edge contacts the barrier, the bag resists deformations which would tend to misalign the bag.
  • the corrugated regions improve the rigidity of the leading edge as well as the rigidity of the overall body of the bag so that the bag misalignment is corrected when it strikes the barrier.
  • the end portions of the upper rods 23 near the corrugating rollers 15 are positioned to extend to approximately the lower extremities of the tyres 26 on the upper rod 25.
  • the end portions of the lower rods 24 near the corrugating rollers 15 are positioned to be near the upper extremities of the tyres 26 on the lower rod 25..
  • Fig. 6 shows a plastics bag after it has come to rest after sliding between the rods 23 and 24 to a barrier such as fence 28.
  • the fence 28 is a linear arrangement of fixed vertical cylinders as shown in Figs. 2 and 3.
  • an air knife comprises a linear arrangement of air nozzles which provide a blast of air for, in this instance moving a plastics bag-towards the pinch rollers 18.
  • a typical air knife is described in U.S. Patent No. 3,918,698.
  • a corrugation in the bag For a bag removal system using an overheated air knife and pinch rollers, it is preferable to define a corrugation in the bag to correspond to the space between the pinch rollers and generally to extend towards the pinch rollers. As shown in Fig. 6, it is preferable to have a rod 31 above the bag 27 and tending to deform the bag 27 towards the rollers 18.
  • Fig. 7 shows the plastics bag 27 after it has been engaged by the nip rollers 18 and-is being pulled downward between belts 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP79300514A 1978-03-30 1979-03-29 Appareil pour plier des sacs Withdrawn EP0004749A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89182278A 1978-03-30 1978-03-30
US891822 1978-03-30

Publications (2)

Publication Number Publication Date
EP0004749A2 true EP0004749A2 (fr) 1979-10-17
EP0004749A3 EP0004749A3 (fr) 1979-10-31

Family

ID=25398877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79300514A Withdrawn EP0004749A3 (fr) 1978-03-30 1979-03-29 Appareil pour plier des sacs

Country Status (7)

Country Link
EP (1) EP0004749A3 (fr)
JP (1) JPS6012934B2 (fr)
AU (1) AU4558179A (fr)
BR (1) BR7901902A (fr)
CA (1) CA1130831A (fr)
DK (1) DK129479A (fr)
MX (1) MX148324A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233383B (en) * 1989-06-21 1994-01-19 Harold Darlington Sharman Improvements relating to the lining of troughs
EP0778125A2 (fr) * 1995-12-05 1997-06-11 WindmÀ¶ller & Hölscher Appareil pour renforcer des flans de papier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2727868B1 (fr) * 2012-10-30 2016-01-06 Müller Martini Holding AG Dispositif et procédé destinés à plier des feuilles imprimées
CN106142680B (zh) * 2016-08-22 2018-04-24 王根乐 塑料袋冲口机折袋机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6506362A (fr) * 1964-05-20 1965-11-22
US3859898A (en) * 1971-11-12 1975-01-14 Fmc Corp Method of and apparatus for stacking flexible articles
US3918698A (en) * 1970-11-23 1975-11-11 Coast Machinery Inc High speed machine and method for folding plastic bags and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6506362A (fr) * 1964-05-20 1965-11-22
US3918698A (en) * 1970-11-23 1975-11-11 Coast Machinery Inc High speed machine and method for folding plastic bags and the like
US3859898A (en) * 1971-11-12 1975-01-14 Fmc Corp Method of and apparatus for stacking flexible articles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233383B (en) * 1989-06-21 1994-01-19 Harold Darlington Sharman Improvements relating to the lining of troughs
EP0778125A2 (fr) * 1995-12-05 1997-06-11 WindmÀ¶ller & Hölscher Appareil pour renforcer des flans de papier
EP0778125A3 (fr) * 1995-12-05 1998-04-08 WindmÀ¶ller & Hölscher Appareil pour renforcer des flans de papier

Also Published As

Publication number Publication date
DK129479A (da) 1979-10-01
AU4558179A (en) 1979-10-04
EP0004749A3 (fr) 1979-10-31
JPS54133978A (en) 1979-10-18
JPS6012934B2 (ja) 1985-04-04
CA1130831A (fr) 1982-08-31
MX148324A (es) 1983-04-11
BR7901902A (pt) 1979-11-27

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Owner name: UNION CARBIDE CORPORATION

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18W Application withdrawn

Withdrawal date: 19820619

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Inventor name: MCDONALD, JAMES ANTHONY