EP0816231B1 - System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels - Google Patents

System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels Download PDF

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Publication number
EP0816231B1
EP0816231B1 EP96304846A EP96304846A EP0816231B1 EP 0816231 B1 EP0816231 B1 EP 0816231B1 EP 96304846 A EP96304846 A EP 96304846A EP 96304846 A EP96304846 A EP 96304846A EP 0816231 B1 EP0816231 B1 EP 0816231B1
Authority
EP
European Patent Office
Prior art keywords
lip
bag
opening
bags
bag opening
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.)
Expired - Lifetime
Application number
EP96304846A
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English (en)
French (fr)
Other versions
EP0816231A1 (de
Inventor
Gregory E. Mcdonald
Andrew W. Moehlenbrock
John D. Foster
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.)
Cryovac LLC
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Cryovac LLC
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 Cryovac LLC filed Critical Cryovac LLC
Priority to PT96304846T priority Critical patent/PT816231E/pt
Priority to DE69619228T priority patent/DE69619228T2/de
Priority to ES96304846T priority patent/ES2171211T3/es
Priority to DK96304846T priority patent/DK0816231T3/da
Priority to EP96304846A priority patent/EP0816231B1/de
Priority to AT96304846T priority patent/ATE213212T1/de
Publication of EP0816231A1 publication Critical patent/EP0816231A1/de
Application granted granted Critical
Publication of EP0816231B1 publication Critical patent/EP0816231B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks

Definitions

  • the invention relates to a method of opening a bag and a bag opening system for opening bags having an offset or cutout lip
  • Bags of various materials and structures are frequently used in the packaging of food and other items. Numerous patents exist which deal with the problem of opening the bag prior to inserting the product to be packaged. The need still exists, however, for a simple, reliable and effective method and system for opening the bags.
  • GB-A-2176165 discloses the use of adhesive tape to carry a plurality of bags towards a bag opening and loading station, each of the bags comprising superposed layers of film which define a generally flat bag mouth. This mouth is opened by a bag opening member penetrating the upper layer, and optionally a lower layer. When the bag opening member is raised it grips the resilient film of the upper layer to lift the upper layer away from the lower layer while the lower layer is held down by adhesion to tape.
  • the upper layer may project longitudinally beyond the lower layer at the bag mouth so that the bag opening member engages only the upper layer.
  • a method of opening a bag comprising the steps of: providing a plurality of bags, each bag comprising a first layer having a first lip and a second layer having a second lip, said first lip and second lip defining a substantially flat bag opening, and said first lip having a cutout defining an extending portion of said second lip which extends beyond said first lip; positioning said plurality of bags in a row on an adhesive strip for advancing said bags along a path by adhering said first lip of each bag to said adhesive strip so that said bag opening is positioned transverse to said path and at a leading edge of said bag with respect to a direction of advance of said bag along said path; advancing said plurality of bags along said path toward a bag opening means; and displacing said bag opening means into contact with said extending portion of the first bag of the row so as to displace said second lip away from said first lip along the entire width of said first and second lips, thereby opening said bag opening, said method being characterised as claimed in claim 1.
  • a bag opening system comprising: a plurality of bags, each bag having a first lip and a second lip defining a substantially flat bag opening, said second lip having an extending portion extending beyond a portion of said first lip but not beyond the first lip along the entire width of said first lip, wherein said first lip has a cutout defining said extending portion of said second lip; means for positioning said plurality of bags in a row, said bags being positioned with said first lip attached to said positioning means and with said bag opening positioned transverse to said row; opening means for contacting said extending portion of said second lip of the first bag of the row so as to displace said second lip away from said first lip along the entire width of said first and second lips and to open said bag opening, and wherein said opening means passes through said cutout to contact said extending portion; and means for advancing said positioning means so as to advance said plurality of bags to said opening means.
  • Claims 1 and 2 are delimited over GB-A-2,176,165.
  • the invention relates to a method and system of opening a bag for the packaging of food and.other products in the bag.
  • bags 10 to be opened in accordance with the method and system of the present invention are substantially flat and have an upper layer or side wall 12 and a lower layer or side wall 14. Layers 12, 14 are joined to each other at a bottom edge 16 and side edges 18 thereof. Layers 12, 14 have upper and lower lip portions 22, 24 respectively which serve to define an open top edge or bag opening 20 of bag 10. According to the invention, bags 10 are initially provided in a substantially flat condition as shown. Bag opening 20 of bag 10 is opened according to the invention so that bag 10 may be loaded with a product or for any other desired procedure in which it is desired to open bag opening 20.
  • bags 10 according to the invention are positioned on adhesive tape or strips 26, preferably on two substantially parallel spaced strips 26 as shown. Strips 26 are advanced so as to transport bags 10 along a substantially horizontal or vertical path for individual opening according to the invention, and subsequent loading and/or sealing steps and the like.
  • bags 10 are positioned with bag opening 20 arranged at a leading edge of bag 10 with respect to the direction of advance (indicated by arrow A in Fig. 1) of bags 10 and strips 26. Bags 10 are positioned in an end seal arrangement with bag opening 20 of each bag 10 arranged substantially transverse to the direction of advance as shown. Bags 10 are removably adhered to strips 26 so that bags 10 may be either removed from the strips and loaded or alternately after opening and insertion of product, readily removed from strips 26 as desired for further processing according to conventional techniques.
  • Any suitable motive means 27 may be provided, as shown schematically in Figs. 5-8, for advancing strips 26 and bags 10 positioned thereon in accordance with the invention.
  • Adhesive strips 26 may be made from any suitable flexible material, and provided with any adhesive sufficient to hold lower layer 14 in place during lifting of upper layer 12 and opening of bag 10.
  • the adhesive is also preferably sufficiently releasable so as to permit removal of bags 10 from strips 26 after opening and loading.
  • a plurality of bags are provided on strips 26, arranged in a row and partially overlapping as shown in Fig. 4. Bags 10 may thereby be advanced toward an opening station generally referred to by reference numeral 36 so as to position bags 10 one at a time for opening at station 36. For simplicity, only a single bag 10 is illustrated in the other drawings.
  • lower layer 14 is removably adhered to strips 26 and has a cutout 28 arranged in lower lip portion 24 thereof so as to provide an extending portion 30 of upper lip portion 22 at bag opening 20 where upper lip portion 22 is exposed or offset relative to lower lip portion 24.
  • Fig. 2 has a portion of upper layer 12 sectioned away so as to better illustrate cutout 28 in-lower layer 14 according to the invention.
  • Cutout 28 according to the invention preferably has a width W which is less than the spacing S of strips 26 so that upper layer 12 is not also adhered to strips 26.
  • cutout 28 could alternatively be wider than the spacing S of strips 26.
  • Cutout 28 may be formed in lower layer 14 according to any known procedure.
  • a force is applied by a lifting mechanism 36 to extending portion 30 of upper lip portion 22 in a direction substantially away from lower lip portion 24 whereby lower lip portion 24 is held in place by strips 26 and upper lip portion 22 is displaced away from lower lip portion 24, thereby opening bag opening 20 of bag 10 in accordance with the invention.
  • arm members 32 on lifting mechanism 36 are provided for applying the desired force F (See also Fig. 8) to portion 30 of bag 10 so as to open bag 10 in accordance with the invention.
  • arms 32 are preferably moveable in a substantially vertical or perpendicular direction relative to a bag 10 positioned on strips 26 according to the invention, as indicated by arrows V.
  • arms 32 may preferably be movably mounted to a carriage 34 or other member which is moveable in a direction substantially parallel to the direction or path of advance of strips 26 as indicated by arrows P.
  • Any means 35 known in the art may suitably be utilized according to the invention for providing the desired movement of arm members 32 and carriage 34 as illustrated schematically in Figs. 5-8.
  • vertical and parallel movement of arm members 32 may both be provided through carriage 34, or through any other suitable structure so as to provide the desired degrees of movement of arm members 32.
  • arm members 32 may be provided. Arm members 32 are preferably spaced at a spacing less than spacing S of strips 26 and less than width W of cutout 28 so that arm members 32 may readily pass between strips 26 and through cutout 28 during the opening or force applying step of the bag opening method of the present invention.
  • bags 10 are positioned on strips 26 as described above with each bag opening 20 in a leading position. Bags 10 and strips 26 are advanced toward lifting mechanism 36 so as to position bag opening 20 of a bag 10 for opening.
  • arm members 32 are positioned from a starting position indicated in Fig. 5 to a position below strips 26 and bag 10 or, in other words, to the lower layer 14 side of bag 10 as shown in Fig. 6. Arm members 32 are then advanced relative to bag 10 so as to position arm members 32 below portion 30 and cutout 28 as shown in Fig. 7. Arm members 32 are then lifted according to the invention so that arm members 32 pass through cutout 28 and contact portion 30 of upper lip portion 22. Further lifting of arm members 32 to the position illustrated in Fig.
  • the bag opening method of the present invention is carried out without the use of air pressure, vacuum and the like, and while minimizing the previously experienced problem of sticking between lips 22, 24 of bag opening 20.
  • a product (not shown) can be inserted into bag 10.
  • Arm members 32 can preferably be withdrawn from bag 10, to the starting position of Fig. 5, and loaded bag 10 removed to the next station for further processing according to conventional techniques which form no part of the present invention.
  • the next bag 10 to be opened is then advanced and the method repeated as desired.
  • Rollers 38 or any other suitable structure can be provided if desired for rolling up advanced strips 26 or for guiding strips 26 to a discarding or recycling station.
  • Bags 10 may be made from any desired material.
  • Figs. 1 and 2 illustrate straight seal bags, that is bags having a substantially straight bottom edge 16 and bag opening 20
  • bags 10 could be provided with curved bottom edges 16 and bag openings 20 as illustrated in Fig. 9.
  • cutout 28 may be curved to match the contour of bag opening 20 if desired, or cutout 28 may be straight as in Figs. 1 and 2, all within the scope of the present invention.
  • FIG. 10 An alternate bag system is illustrated in Figures 10 and 11 a bag 40 consisting of a top lip 42 and bottom lip 46 with the top lip 42 having one or more partial offsets or cutout portions 44 exposing the bottom lip 46 and the bottom lip 46 having a one or more partial offsets as cutout portions 48 exposing the top lip 42 may be opened with the device 50 shown in Figure 11.
  • the device 50 consists of two circular rails 52 and 54 held equidistant by a stationary top block 56 and a stationary bottom block 58, the bottom block 58 having two clamps 60, 62 which are moved vertically relative to block 58.
  • the device has an intermediate block 64 which may move along rails 52, 54 and has two clamps 66, 68 which is moved vertically relative to intermediate block 64.
  • the intermediate block 64 By moving the intermediate block 64 towards the bottom block 58 and indexing the bag 40 towards the device 50 the partial offsets 44, 48 in the bag lip may be aligned with the bag clamps 60, 62, 66, 68. After closing the clamps which secures the top and bottom lips the intermediate block 64 is moved toward the top block 56 along rails 52, 54 moving the top lip 42 away from the bottom lip 46 for opening the bag 40.

Claims (7)

  1. Verfahren zum Öffnen eines Beutels (10), mit den Schritten:
    Bereitstellen einer Vielzahl von Beuteln, wobei jeder Beutel eine erste Lage (14) mit einer ersten Lippe (24) und eine zweite Lage (12) mit einer zweiten Lippe (22) hat, wobei die erste Lippe und die zweite Lippe eine im wesentlichen flache Beutelöffnung (20) bilden, und wobei die zweite Lippe einen vorstehenden Bereich (30) hat, der sich bis über die erste Lippe hinaus erstreckt;
    Positionieren der Vielzahl von Beuteln in einer Reihe auf einem Klebestreifen (26), um die Beutel entlang eines Weges vorzubewegen, indem die erste Lippe von jedem Beutel an dem Klebestreifen festgeklebt ist, so daß die Beutelöffnung schräg zu dem Weg und an einer führenden Kante des Beutels bezüglich einer Vorbewegungsrichtung des Beutels entlang des Weges positioniert ist;
    Vorbewegen der Vielzahl von Beuteln entlang des Weges in Richtung auf eine Beutelöffnungseinrichtung (32); und
    Verlagern der Beutelöffnungseinrichtung (32) in Kontakt mit dem vorstehenden Bereich des ersten Beutels der Reihe und Verlagern der zweiten Lippe weg von der ersten Lippe entlang der gesamten Breite der ersten und zweiten Lippe, wodurch die Beutelöffnung geöffnet wird;
       dadurch gekennzeichnet, daß die erste Lippe (14) einen Ausschnitt (28) hat, durch den der vorstehende Bereich (30) der zweiten Lippe (22) definiert ist; und daß die Verlagerung der Beutelöffnungseinrichtung (32) das Vorschieben der Beutelöffnungseinrichtung (32) durch den Ausschnitt (28) in der ersten Lippe (24) und in Kontakt mit dem vorstehenden Bereich (30) der zweiten Lippe (22) umfaßt.
  2. Beutelöffnungssystem, mit:
    einer Vielzahl von Beuteln (10), wobei jeder Beutel eine erste Lippe (24) und eine zweite Lippe (22) aufweist, die eine im wesentlichen flache Beutelöffnung (20) bilden, wobei die zweite Lippe einen vorstehenden Bereich (30) hat, der über einen Bereich der ersten Lippe hinaus vorsteht;
    einer Einrichtung (26) zum Positionieren der Vielzahl von Beuteln in einer Reihe, wobei die Beutel positioniert sind, daß die erste Lippe (24) an der Positionierungseinrichtung (26) befestigt ist und die Beutelöffnung schräg zu der Reihe positioniert ist;
    einer Öffnungseinrichtung (32), um mit dem vorstehenden Bereich der zweiten Lippe des ersten Beutels der Reihe in Kontakt zu kommen, um so die zweite Lippe (22) weg von der ersten Lippe (24) zu verlagern und um die Beutelöffnung (20) zu öffnen; und
    einer Einrichtung (38), um die Positionierungseinrichtung (26) vorzubewegen, um so die Vielzahl von Beuteln zu der Öffnungseinrichtung (32) vorzubewegen;
       dadurch gekennzeichnet, daß die erste Lippe einen Ausschnitt (28) hat, durch den der vorstehende Bereich (30) der zweiten Lippe definiert ist; daß sich der Ausschnitt (28) nicht entlang der gesamten Breite der ersten Lippe erstreckt; und daß die Öffnungseinrichtung durch den Ausschnitt führt, um mit dem vorstehenden Bereich in Kontakt zu kommen, um die zweite Lippe (24) von der ersten Lippe (22) entlang der gesamten Breite der ersten und zweiten Lippe zu trennen.
  3. Beutelöffnungssystem nach Anspruch 2, bei dem die Einrichtung zum Positionieren der Beutel zumindest einen Klebestreifen aufweist, wobei die erste Lippe von jedem Beutel an dem Streifen festgeklebt ist.
  4. Beutelöffnungssystem nach Anspruch 3, bei dem die Einrichtung zum Positionieren der Beutel zwei im wesentlichen parallel beabstandete Klebestreifen aufweist.
  5. Beutelöffnungssystem nach Anspruch 4, bei dem die beiden beabstandeten Klebestreifen mit einem Bandabstand beabstandet sind und bei dem der Ausschnitt schmaler als der Bandabstand ist.
  6. Beutelöffnungssystem nach einem der Ansprüche 2 bis 5, bei dem die Öffnungseinrichtung zumindest ein Armbauteil aufweist, das relativ zu der Positionierungseinrichtung zwischen einer Fertig-Position, in der sich das Armbauteil an einer Seite der Positionierungseinrichtung befindet, und einer Öffnen-Position bewegbar positioniert ist, in der sich das Armbauteil an der anderen Seite der Positionierungseinrichtung befindet.
  7. Beutelöffnungssystem nach einem der Ansprüche 2 bis 5, bei der die Öffnungseinrichtung einen Schlitten, der für eine Bewegung in eine erste Richtung im wesentlichen parallel zu der Öffnungseinrichtung ausgestaltet ist, und zumindest ein Armbauteil aufweist, das an dem Schlitten für eine Bewegung in eine zweite Richtung im wesentlichen senkrecht zu der Positionierungeinrichtung montiert ist.
EP96304846A 1996-07-01 1996-07-01 System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels Expired - Lifetime EP0816231B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PT96304846T PT816231E (pt) 1996-07-01 1996-07-01 Sistema e metodo de abrir um saco com rebordo parcialmente desviado
DE69619228T DE69619228T2 (de) 1996-07-01 1996-07-01 System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels
ES96304846T ES2171211T3 (es) 1996-07-01 1996-07-01 Sistema y procedimiento para la apertura de una bolsa, con labio de desplazamiento parcial.
DK96304846T DK0816231T3 (da) 1996-07-01 1996-07-01 System og fremgangsmåde til at åbne en pose med delvist forsat læbe
EP96304846A EP0816231B1 (de) 1996-07-01 1996-07-01 System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels
AT96304846T ATE213212T1 (de) 1996-07-01 1996-07-01 System und verfahren zum oeffnen eines, mit einer teilweise versetzten lippe versehenen, beutels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96304846A EP0816231B1 (de) 1996-07-01 1996-07-01 System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels

Publications (2)

Publication Number Publication Date
EP0816231A1 EP0816231A1 (de) 1998-01-07
EP0816231B1 true EP0816231B1 (de) 2002-02-13

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ID=8224995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96304846A Expired - Lifetime EP0816231B1 (de) 1996-07-01 1996-07-01 System und Verfahren zum Oeffnen eines, mit einer teilweise versetzten Lippe versehenen, Beutels

Country Status (6)

Country Link
EP (1) EP0816231B1 (de)
AT (1) ATE213212T1 (de)
DE (1) DE69619228T2 (de)
DK (1) DK0816231T3 (de)
ES (1) ES2171211T3 (de)
PT (1) PT816231E (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972157A (en) * 1975-03-24 1976-08-03 Sanford Meyers Bag holding and opening apparatus
GB2176165A (en) * 1985-06-14 1986-12-17 Grace W R & Co Bag opening device for packaging

Also Published As

Publication number Publication date
DE69619228T2 (de) 2002-08-14
PT816231E (pt) 2002-07-31
EP0816231A1 (de) 1998-01-07
DE69619228D1 (de) 2002-03-21
DK0816231T3 (da) 2002-04-15
ES2171211T3 (es) 2002-09-01
ATE213212T1 (de) 2002-02-15

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