EP0959006A1 - Verfahren und Vorrichtung zum öffnen eines Verpackungsbeutels - Google Patents

Verfahren und Vorrichtung zum öffnen eines Verpackungsbeutels Download PDF

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Publication number
EP0959006A1
EP0959006A1 EP99610032A EP99610032A EP0959006A1 EP 0959006 A1 EP0959006 A1 EP 0959006A1 EP 99610032 A EP99610032 A EP 99610032A EP 99610032 A EP99610032 A EP 99610032A EP 0959006 A1 EP0959006 A1 EP 0959006A1
Authority
EP
European Patent Office
Prior art keywords
bag
wall
store
abutment surface
outward
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.)
Pending
Application number
EP99610032A
Other languages
English (en)
French (fr)
Inventor
Gunnar Christian Petersen
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.)
Newtec AS
Original Assignee
Newtec AS
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 Newtec AS filed Critical Newtec AS
Publication of EP0959006A1 publication Critical patent/EP0959006A1/de
Pending 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
    • B65B43/12—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
    • B65B43/16—Feeding individual bags or carton blanks from piles or magazines by grippers
    • 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
    • B65B43/28—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by grippers co-operating with fixed supports

Definitions

  • the present invention relates to a method for opening an outermost packaging bag of an ordered store of flat-laid bags of the type having bag walls made of flexible plastic foil.
  • an apparatus For opening of the top bag in a store of such bags arranged horizontally, an apparatus is known from DE-A1-195 10 669, in which the extended throat portion of the lower wall of the top bag facing the store is restrained against the bag store by a jaw-like holder while the upper wall is gripped by a gripper with movable jaws.
  • the object of the invention is to provide a method of the type stated above, which permits a secure and simple opening of the outermost bag of a bag store, whether it consists of bags of the design with an extended side portion or bags having no everted extended portion of one bag wall in relation to the other.
  • the method according to the invention is characterized in that a vacuum is selectively applied at at least one local area of the outward wall of the bag near the throat edge for lifting free the said local area without movement of the opposite inward bag wall while the outermost bag is restrained against the store, and that the area lifted free is restrained by clamping so that at subsequent release of its restraint against the bag store the outward bag side can be moved away from the internal wall.
  • the outward wall is securely lifted free of the inward wall so that the area lifted free can be gripped and restrained at the subsequent clamping.
  • the outward wall can be moved away from the bag store while its inward wall will not accompany it due to the force of adhesion to the subsequent bag in the bag store.
  • said restraint, lifting free and clamping are performed by means of a reciprocating gripping device movable in relation to the bag store and arranged substantially at right angles to said outward wall, the gripping device having a selectively actuatable vacuum suction device set back from an abutment surface for restraining said outward wall and a selectively actuatable clamping device for clamping the area lifted free by means of the vacuum cup against said abutment surface, whereby the vacuum suction device is actuated in a first end position of the reciprocating movement of the gripping device with the outward bag wall restrained against the bag store, while release of the clamping device takes place in a second end position in which the outward bag wall has been moved away from the bag store while the inward bag wall is restrained against the bag store during the entire movement from the first to the second end position.
  • actuation of the clamping device and subsequent cessation of the application of the vacuum can suitably be effected during the movement of the gripping device away from the first towards the second end position in an intermediate position in which the bag area lifted free has been moved a distance away from the bag store.
  • restraint of the inward bag wall against the bag store as well as restraint of the outward bag wall by means of said abutment surface and clamping device are effected over a narrow elongated surface extending in parallel with the throat edge of the bag over a substantial part of the bag width so that in the second end position the throat of the bag assumes a substantially rectangular shape with stretched throat edges.
  • the invention provides an apparatus comprising means for restraining a store of packaging bags with bag walls made of flexible plastic foil in a flat-laid condition and with aligned throat edges of the bag walls, which apparatus is characterized in that a reciprocating gripping device movable in relation to the bag store and arranged substantially at right angles to the outward side of the bag store comprises an abutment surface for external restraint of the outermost bag against the bag store in a first end position of the gripping device, a selectively actuatable vacuum suction device set back in relation to said abutment surface and adapted for lifting said local area of the external bag wall of the outermost bag free of the opposite bag wall in said first end position, and a selectively actuatable clamping device arranged in operative cooperation with said abutment surface and vacuum suction device for clamping the lifted local area of the external bag wall against said abutment surface during the movement of the gripping device from the first end position towards a second end position in which the outward wall of the outer
  • a store or stack 1 of flat-laid bags provided with holes (not shown) for the purpose near their upward throats are suspended in a vertical position from rods 3.
  • a reciprocating gripping device 5 capable of moving towards and away from the bag store 1 substantially at right angles to the plane of the outermost bag 2 comprises a relatively narrow elongated abutment surface 6 which, in the first end position of the movement of the gripping device 5 shown in Fig. 2, restrains the outward side 4 of the outermost bag 2 against the bag store.
  • a selectively actuatable vacuum suction device comprises a suction channel 7 connected to a vacuum source (not shown) via a controlled valve (also not shown) and opening into a wall portion 8 of the gripping device 5 set back in relation to the abutment surface 6.
  • the gripping device 5 also comprises a selectively actuatable clamping device comprising, in the schematic design shown, a swingable clamping jaw 9, which can be swung by means of a control mechanism in the form of, for example, a hydraulic actuator 10 from an inactive position shown in Fig. 2 to the active position shown in Fig. 3, in which the jaw is brought into abutment on the wall portion 8 into which the suction channel 7 opens.
  • a control mechanism in the form of, for example, a hydraulic actuator 10 from an inactive position shown in Fig. 2 to the active position shown in Fig. 3, in which the jaw is brought into abutment on the wall portion 8 into which the suction channel 7 opens.
  • Fig. 1 shows the gripping device 5 during movement towards the first end position shown in Fig. 2, in which the abutment surface 6 has been brought into abutment on the outward wall 4 of the outermost bag 2, and the vacuum suction device with the suction channel 7 is actuated as indicated by an arrow 11, whereby a local area 12 of the outward bag wall 4 immediately below the abutment surface 6 is sucked against the set-back wall portion 8, while the clamping jaw 9 is still in its inactive position.
  • the clamping jaw is suitably only actuated when the area 12 of the outward bag wall sucked locally has been moved some distance away from the bag store 1, that is, in an intermediate position of the gripping device during its movement from the first towards the second end position.
  • the reciprocating movement of the gripping device 5 can be produced by means of a conventional driving assembly with a suitable control system to control the movement of the individual parts and ensure suitable abutment pressure of the abutment surface 6 on the outermost bag 2 in the first end position.
  • a pressurized air assembly 13 By arranging a pressurized air assembly 13 in connection with the throat of the bag 2 lifted free, as shown in Fig. 3, an injection of air into the bag can be provided to support the opening of the bag. This may be of importance, especially in case of bags that are impermeable and have no air holes.
  • the gripping device 14 is arranged with the abutment surface 15 extending in parallel with the upward throat of the outermost bag 16 and at a short distance therefrom.
  • the abutment surface 15 is made to have such length that it extends over a substantial part of the width of the bag 16 corresponding to the distance between the suspension rods 17 for the bag store 18.
  • the clamping device comprises two movable clamping jaws 22 which are swingable towards each other in connection with a joint hydraulic actuator 22a, through which the clamping jaws 22 can be moved from the inactive position shown in Fig. 4, in which local areas 23 of the outward wall 24 of the bag 16 are sucked against the wall portions 20, to the active position shown in Fig. 5 for clamping the local areas 23 of the bag wall 24 against the set-back wall portions 20 at the recesses 19.
  • the result of this design of the gripping device is that the throat of the outermost bag 16 with the outward bag wall 24 lifted free assumes a substantially rectangular shape with two parallel sides formed by the part of the bag wall 24 restrained by the clamping jaws 22 and the opposite part of the inward bag wall 25 located between the suspension rods 17 and still restrained against the bag store 18, and two parallel sides 26 and 27 extending substantially at right angles to the bag store so that, as explained below, they are easily accessible for gripping by a bag feeder in a bag feeding system.
  • the bag 16 is now ready for filling with the products to be packaged.
  • the filling can be effected by means of conventional filling equipment in direct connection with the apparatus according to the invention, i.e., without moving the bag from the position shown in Fig. 6, or it may be effected in a packaging machine with several work stations comprising a filling station separated from the apparatus according to the invention, to which the bag is moved from the position shown in Fig. 6 by means of a movable bag feeder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP99610032A 1998-05-12 1999-05-11 Verfahren und Vorrichtung zum öffnen eines Verpackungsbeutels Pending EP0959006A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK64898 1998-05-12
DK64898A DK64898A (da) 1998-05-12 1998-05-12 Fremgangsmåde til åbning af emballeringspose samt apparat til udøvelse af fremgangsmåden

Publications (1)

Publication Number Publication Date
EP0959006A1 true EP0959006A1 (de) 1999-11-24

Family

ID=8095971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99610032A Pending EP0959006A1 (de) 1998-05-12 1999-05-11 Verfahren und Vorrichtung zum öffnen eines Verpackungsbeutels

Country Status (2)

Country Link
EP (1) EP0959006A1 (de)
DK (1) DK64898A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512249C2 (sv) * 1995-06-20 2000-02-21 Flaekt Ab Anordning vid ett elektrofilter för upphängning, och slagning av utfällningselektroder
CN109278359B (zh) * 2018-11-14 2023-11-21 温州临界科技有限公司 一种手提袋穿绳机用袋体上料装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814488A (en) * 1954-06-24 1957-11-26 Trescott Company Inc Bag lifter and opener
EP0002075A1 (de) * 1977-10-17 1979-05-30 Moba Holding Barneveld B.V. Vorrichtung und Verfahren zum Erfassen und Öffnen eines Beutels
DE19510669A1 (de) 1995-03-27 1996-10-02 P S Spezial Maschf Gmbh Vorrichtung zum Öffnen eines Beutels
US5651238A (en) 1993-07-02 1997-07-29 Pitney Bowes Inc. Apparatus and method for variable opening of envelopes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814488A (en) * 1954-06-24 1957-11-26 Trescott Company Inc Bag lifter and opener
EP0002075A1 (de) * 1977-10-17 1979-05-30 Moba Holding Barneveld B.V. Vorrichtung und Verfahren zum Erfassen und Öffnen eines Beutels
US5651238A (en) 1993-07-02 1997-07-29 Pitney Bowes Inc. Apparatus and method for variable opening of envelopes
DE19510669A1 (de) 1995-03-27 1996-10-02 P S Spezial Maschf Gmbh Vorrichtung zum Öffnen eines Beutels

Also Published As

Publication number Publication date
DK64898A (da) 1999-11-13

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