US20070017187A1 - Plastic bag opening apparatus - Google Patents

Plastic bag opening apparatus Download PDF

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Publication number
US20070017187A1
US20070017187A1 US11/485,376 US48537606A US2007017187A1 US 20070017187 A1 US20070017187 A1 US 20070017187A1 US 48537606 A US48537606 A US 48537606A US 2007017187 A1 US2007017187 A1 US 2007017187A1
Authority
US
United States
Prior art keywords
holding member
plastic bags
bags
elongations
pressing
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.)
Abandoned
Application number
US11/485,376
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English (en)
Inventor
Hajime Chikatani
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.)
Daisey Machinery Co Ltd
Original Assignee
Daisey Machinery Co Ltd
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 Daisey Machinery Co Ltd filed Critical Daisey Machinery Co Ltd
Assigned to DAISEY MACHINERY CO., LTD. reassignment DAISEY MACHINERY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHIKATANI, HAJIME
Publication of US20070017187A1 publication Critical patent/US20070017187A1/en
Abandoned 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
    • B65B43/34—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by internal pressure
    • B65B43/36—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by internal pressure applied pneumatically

Definitions

  • the present invention generally relates to a plastic bag opening apparatus and more particularly to an apparatus for opening plastic bags in a stack, one by one, where each of the bags has one edge of its opening portion elongated, the edge so elongated is provided with two pin holes and a multiplicity of the bags are held together with pins, having upper ends free, being inserted into the pin holes.
  • a packaging apparatus for making packages by filling articles in plastic bags for packaging purpose it is necessary to open the bags, one by one, out of a multiplicity of the bags held together in a stack.
  • a plastic bag 1 is formed having one edge of its opening portion 0 elongated to form an elongation 2 , the elongation 2 is provided with two pin holes 3 , as shown in FIG. 9 , and pins 04 are inserted into the pin holes 3 so that a multiplicity of the bags 1 are held together in a stack and the bags 1 in this state are opened, one by one, to be filled with articles.
  • each of the plastic bags 1 so opened must be released from the pins 04 .
  • Numeral 05 designates a perforated line provided so that the plastic bag 1 can be easily torn off at the portion of the pin holes 3 .
  • a bag opening apparatus constructed to open plastic bags in a stack, one by one from the uppermost one, by blowing air obliquely from above toward the bags, where each of the bags has one edge of opening portion elongated to form an elongation, the elongation is provided with two pin holes and the bags are held together with pins, having upper ends free, being inserted into the pin holes.
  • the present invention provides a plastic bag opening apparatus constructed to open plastic bags, where each of the plastic bags has one edge of its opening portion elongated to form an elongation, the elongation is provided with two pin holes and the plastic bags are held together in a stack with pins, having their upper ends free, being inserted into the pin holes and opened one by one from the uppermost one of the plastic bags in the stack by being blown with air obliquely from above, characterized in that the plastic bag opening apparatus comprises a center holding member to press the elongations between the two pin holes, side holding members to press the elongations on both outer sides of the pin holes and a control device to control movements of the center holding member and side holding members such that when the plastic bags are to be opened by the air blowing, the pressing by the side holding members is released and when the plastic bags so opened are to be discharged, the side holding members press the remainder of the plastic bags in the stack and the pressing by the center holding
  • the elongation is formed by an edge of a lower sheet out of two sheets forming the bag opening portion being elongated and while the elongations of the bags are held pressed by the center holding member between the two pin holes, air is blown obliquely from above toward the bag opening portion.
  • the uppermost one of the bags held together in the stack is partially opened and, at this time, the bag at the portion of the pin holes is drawn out of the pins having their upper ends free.
  • an opening member that is vertically and/or horizontally enlargeable is inserted into the bag opening portion so partially opened and the bag opening portion is enlarged to be fully opened.
  • the elongation except the portion pressed by the center holding member between the two pin holes, is lifted up so that the bag at the portion of the pin holes still inserted with the pins can be fully drawn out of the pins.
  • the bag opening portion is enlarged and the plastic bag at the portion of the pin holes is drawn out of the pins without being torn off or broken so that the plastic bag becomes ready for being filled with articles.
  • the bag so opened there remains no broken fraction in the vicinity of the pin holes differently from the conventional case and packaged articles having an excellent exterior appearance can be produced.
  • the remainder of the stacked plastic bags after the uppermost bag is so opened are pressed at the portion of the elongations by the side holding members on both outer sides of the pin holes. Hence, even if the pressing by the center holding member is released for discharge of the opened bag, the stacked plastic bags are pressed by the side holding members and the stacked state of the bags can be stably held.
  • the center holding member and side holding member are respectively constructed such that the pushing-up force acting on the elongations from below is received by the rotating lever vertically positioned so as to be in the dead point state in the vertical direction. That is, the pushing-up force to push up the stacked plastic bags from below is securely received by the center holding member and side holding members and the upper surface of the stacked plastic bags can be always held at the predetermined level.
  • the rotating lever is only rotated around the rotating shaft and thereby the bag opening operation can be smoothly carried out.
  • the rotating lever vertically positioned becomes the dead point state in the vertical direction to thereby securely receive the pushing-up force acting from below.
  • the plastic bags in the stack can be stably opened one by one from the uppermost one of the plastic bags.
  • the rotating shaft to rotate the rotating lever for moving the center holding member and side holding member is constructed to be rotated by elongation and contraction of an air cylinder, there is obtained a plastic bag opening apparatus in which a change-over between a state where the rotating lever vertically positioned to be in the dead point state receives the pushing-up force acting from below and a state where the rotating lever rotated around the rotating shaft releases the pressing of the elongations of the bag opening portion can be easily, quickly and securely carried out.
  • the plastic bag opening apparatus of the present invention as mentioned above, if the pressing by the center holding member and side holding member and release thereof are carried out by a construction such that the rotating lever has its one end fitted with an engaging roller and a member having a slot with which the engaging roller engages is moved by rotation of the rotating lever around the rotating shaft, there is obtained a plastic bag opening apparatus in which the center holding member and side holding members are easily moved by rotation of the rotating lever so that the bag opening operation can be smoothly carried out.
  • FIG. 1 is a plan view showing plastic bags set in a stack to be opened in a plastic bag opening apparatus according to the present invention.
  • FIG. 2 is an explanatory view showing a state that a bag opening operation of the plastic bags shown in FIG. 1 is being carried out by the plastic bag opening apparatus according to the present invention.
  • FIG. 3 is a view seen in the direction of arrow A of FIG. 2 .
  • FIG. 4 is a side view showing a structure of a center holding member used in the plastic bag opening apparatus according to the present invention, wherein the stacked plastic bags are pressed by the center holding member.
  • FIG. 5 is the same side view of the center holding member of FIG. 4 , wherein the pressing of the stacked plastic bags by the center holding member is released.
  • FIG. 6 is a side view showing a structure of a side holding member used in the plastic bag opening apparatus according to the present invention, wherein the stacked plastic bags are pressed by the side holding member.
  • FIG. 7 is the same side view of the side holding member of FIG. 6 , wherein the pressing of the stacked plastic bags by the side holding member is released.
  • FIG. 8 is a cross sectional side view of the plastic bag shown in FIG. 1 .
  • FIG. 9 is an explanatory perspective view showing a state that stacked plastic bags are held together by pins in a plastic bag opening apparatus in the prior art.
  • FIG. 10 is an explanatory side view showing a state that stacked plastic bags held together by pins having upper ends free are being opened in a plastic bag opening apparatus in the prior art.
  • numeral 1 designates a plastic bag for packaging purpose that has its three sides except an opening portion 0 closed.
  • One edge of a plastic sheet out of two plastic sheets forming the opening portion 0 that is, a lower side sheet in the figures, is elongated to form an elongation 2 and the elongation 2 is provided with two pin holes 3 arranged with an interval maintained between them.
  • a multiplicity of the plastic bags 1 so formed are held together in a stack with two pins 4 , having their upper ends free, being inserted into the pin holes 3 .
  • the stacked plastic bags 1 are pressed by a center holding member 13 at the portion of the elongations 2 between the two pin holes 3 .
  • the elongations 2 of the stacked plastic bags 1 are pressed by side holding members 14 at peripheral portions of the elongations 2 on both outer sides of the two pin holes 3 .
  • the stacked plastic bags 1 are pushed up from below with a predetermined pressure by an air cylinder or the like and the construction is so made that this pushing-up force is received by the center holding member 13 and side holding members 14 to thereby always hold an upper surface of the stacked plastic bags 1 at the same level.
  • an appropriate device of known constructions may be employed and one example thereof is shown in the Japanese laid-open patent application 2002-20510.
  • the air 7 blown from the air nozzle 6 is a hot air of temperature of 50 to 80° C. so that temperature of the bag 1 that is being opened is increased and flexibility thereof is enhanced. Thereby, when articles are to be filled in the bag 1 , the bag is prevented from being broken by corner portions or the like of the articles, which is preferable, although not essential.
  • the concrete temperature of the air 7 can be appropriately selected in consideration of a material and thickness of the bag to be used, shape and stiffness of the articles to be filled, etc.
  • the opening member 9 is inserted into the opening so formed by the air 7 from the air nozzle 6 .
  • the opening member 9 comprises four bars, that is, two lower bars 10 and two upper bars 11 . Intervals between the lower bars 10 and upper bars 11 , between the two lower bars 10 and between the two upper bars 11 are changeable by vertical and horizontal movements of the bars.
  • the upper bars 1 1 are moved upward so that the opening of the bag 1 is enlarged, as shown by two dotted chain lines 12 .
  • the bag 1 at the portion of the pin holes 3 is drawn out of the pins 4 , having their upper ends free, that have been inserted into the pin holes 3 .
  • the elongation 2 is by no means broken or torn at the portion of the pin holes 3 .
  • the center holding member 13 is pivotably fitted around a pivotal shaft 15 and is provided with a slot 16 .
  • Numeral 17 designates a rotating member, constituting a rotating lever of the present invention, that is rotatably fitted around a rotating shaft 18 .
  • An engaging roller 19 is rotatably fitted to the rotating member 17 and is fitted in the slot 16 of the center holding member 13 to be rollably moved along the slot 16 .
  • the rotating shaft 18 to which the rotating member 17 is rotatably fitted is provided with a lever 20 and the lever 20 is pivotably fitted to an upper end of a piston rod 22 of an air cylinder 21 .
  • numeral 23 designates an air cylinder that always pushes up the stacked plastic bags 1 . The pushing-up force of the air cylinder 23 is received by the center holding member 13 so that the upper surface of the stacked plastic bags 1 can be held at the same level.
  • the side holding member 14 is fitted with a lever 31 that downwardly elongates and the lever 31 is fitted with a sliding member 32 via a bolt 33 .
  • the sliding member 32 is supported being fitted movably up and down in a groove 34 of a strut 30 .
  • the lever 31 has its lower end fitted with a receiving member 35 and the receiving member 35 is provided with a slot 36 that horizontally elongates.
  • Numeral 37 designates a rotating member constituting a rotating lever of the present invention.
  • the rotating member 37 has its upper end side fitted with a rotating shaft 38 that is connected to an air cylinder and its lever end side fitted rotatably with an engaging roller 39 .
  • the engaging roller 39 fitted to the lower end of the rotating member 37 is fitted in the slot 36 of the receiving member 35 and the construction is so made that when the rotating member 37 is rotated around an axis of the rotating shaft 38 , the receiving member 35 is moved up and down via the engaging roller 39 .
  • numeral 40 designates an air cylinder that always pushes up the stacked plastic bags 1 .
  • the pushing-up force of the air cylinder 40 is received by the center holding member 13 and side holding member 14 so that the upper surface of the stacked plastic bags 1 can be held at the same level.
  • the rotating member 37 is rotated around the axis of the rotating shaft 38 by the rotating shaft 38 being rotated by an appropriate air cylinder (not shown).
  • the edge portion of the bag 1 is released from the center holding member 13 . Even if the bag pressing force by the center holding member 13 is released, the elongations 2 of the bags 1 stacked thereunder are pressed by the side holding members 14 on both outer sides of the pins 4 so that the stacked state of the bags 1 can be maintained in order. Also, the pushing-up force from below of the plastic bags 1 in the stacked state is received by the side holding members 14 in the dead point state, as mentioned above, so that the upper surface of the plastic bags 1 can be maintained at the predetermined level.
  • the construction is made such that when the opening member 9 is inserted into the opening of the bag 1 , it can enlarge the opening in the vertical direction, in the horizontal direction or both in the vertical and horizontal directions and the size thereof may be appropriately selected corresponding to the size, shape or the like of the bag to be opened.
  • the opening member 9 has been described to enlarge the opening of the bag 1 by the upper bars 11 being moved straightly upwardly, as shown in FIG. 3 , in place thereof, such a construction may be employed that four bars are moved obliquely upwardly and obliquely downwardly with an oblique angle of 45°, respectively, so as to enlarge the opening of the bag 1 . That is, an appropriate one of known constructions as the opening member of this kind can be employed.
  • the construction of the rotating members 17 , 37 as the rotating lever has been described such that the engaging rollers 19 , 39 , fitted to the rotating members 17 , 37 , are fitted in the slots 16 , 36 so that when the rotating members 17 , 37 are rotated, the center holding member 13 and side holding members 14 are caused to press the stacked bags 1 or to release the pressing and when the line connecting the rotating shafts 18 , 38 and engaging rollers 19 , 39 becomes vertical, the dead point state of the rotating members 17 , 37 is formed.
  • the center holding member and side holding member may be employed, if they are constructed such that when the rotating member is rotated around the rotating axis, the pressing of the elongations 2 of the bags 1 is released and when the elongations 2 of the bags 1 are to be pressed, the rotating member becomes vertical to form the dead point state so that the pushing-up force from below of the elongations 2 is received by the rotating member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
US11/485,376 2005-07-21 2006-07-13 Plastic bag opening apparatus Abandoned US20070017187A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-211191 2005-07-21
JP2005211191A JP2007022627A (ja) 2005-07-21 2005-07-21 プラスチック袋の開口装置

Publications (1)

Publication Number Publication Date
US20070017187A1 true US20070017187A1 (en) 2007-01-25

Family

ID=37026590

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/485,376 Abandoned US20070017187A1 (en) 2005-07-21 2006-07-13 Plastic bag opening apparatus

Country Status (5)

Country Link
US (1) US20070017187A1 (ja)
EP (1) EP1746027B1 (ja)
JP (1) JP2007022627A (ja)
DE (1) DE602006000800T2 (ja)
ES (1) ES2301139T3 (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080098697A1 (en) * 2006-11-01 2008-05-01 Murray R C Method and apparatus for opening a flexible pouch using opening fingers
US20080245439A1 (en) * 2007-04-04 2008-10-09 Jon Ladson Automated ice vending apparatus and methods of use thereof
US20090241474A1 (en) * 2008-03-03 2009-10-01 Actis Bradley P Bagging assembly
US20110036055A1 (en) * 2008-02-28 2011-02-17 Uni-Charn Corporation Pusher used in packaging equipment
US7958918B2 (en) 2007-04-04 2011-06-14 Jon Ladson Automated ice vending apparatus and method
US20130067870A1 (en) * 2008-03-03 2013-03-21 H.W.J Designs For Agribusiness, Inc. Bag retrieval assembly and bag for pressed bales
US20130283730A1 (en) * 2008-03-03 2013-10-31 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US20170183111A1 (en) * 2015-12-28 2017-06-29 Poongsan Corporation Apparatus for packing ammunition carton in pouch
US20170233119A1 (en) * 2016-01-04 2017-08-17 Roland Lomerson, Jr. Quad Wicket Exchange System
CN112950866A (zh) * 2021-01-28 2021-06-11 深圳市百佳华百货有限公司 一种扫码购物系统用扫码购物装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019043652A (ja) * 2017-09-06 2019-03-22 ゼネラルパッカー株式会社 三角サンドイッチ用包装機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802817A (en) * 1996-04-25 1998-09-08 Hood; Charles T. Method and apparatus for opening a mesh bag
US6516587B1 (en) * 1999-03-02 2003-02-11 Daisey Machinery Co., Ltd. Plastic bag opening method

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Publication number Priority date Publication date Assignee Title
JPS56123219A (en) * 1981-02-10 1981-09-28 Kindai Kk Method of holding bag down in automatic packer
JPH063437Y2 (ja) * 1984-11-30 1994-01-26 松下電器産業株式会社 電子楽器の収納蓋開閉装置
JPH01308724A (ja) * 1987-12-01 1989-12-13 Automated Packaging Syst Inc 包装機械及び包装方法
JPH07290148A (ja) * 1994-04-23 1995-11-07 Press Gijutsu Kenkyusho:Kk レベリング装置における矯正部の開閉構造
JP2001023460A (ja) * 1999-07-08 2001-01-26 Harness Syst Tech Res Ltd 圧接機
JP2002020510A (ja) 2000-07-04 2002-01-23 Mitsubishi Gas Chem Co Inc 強度に優れた高比誘電率プリプレグ及びそれを用いたプリント配線板
JP3895153B2 (ja) * 2001-04-23 2007-03-22 株式会社大生機械 プラスチック袋の開口方法及び装置
JP2002029510A (ja) * 2001-06-15 2002-01-29 Daisey Machinery Co Ltd 包装用袋供給装置
JP3616040B2 (ja) * 2001-07-26 2005-02-02 株式会社フジキカイ 袋詰め機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802817A (en) * 1996-04-25 1998-09-08 Hood; Charles T. Method and apparatus for opening a mesh bag
US6516587B1 (en) * 1999-03-02 2003-02-11 Daisey Machinery Co., Ltd. Plastic bag opening method

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7584593B2 (en) * 2006-11-01 2009-09-08 Pouch Pac Innovations, Llc Method and apparatus for opening a flexible pouch using opening fingers
US20080098697A1 (en) * 2006-11-01 2008-05-01 Murray R C Method and apparatus for opening a flexible pouch using opening fingers
US7958918B2 (en) 2007-04-04 2011-06-14 Jon Ladson Automated ice vending apparatus and method
US20080245439A1 (en) * 2007-04-04 2008-10-09 Jon Ladson Automated ice vending apparatus and methods of use thereof
US7900660B2 (en) 2007-04-04 2011-03-08 Jon Ladson Automated ice vending apparatus and methods of use thereof
US20110036055A1 (en) * 2008-02-28 2011-02-17 Uni-Charn Corporation Pusher used in packaging equipment
US20130283730A1 (en) * 2008-03-03 2013-10-31 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US20130067870A1 (en) * 2008-03-03 2013-03-21 H.W.J Designs For Agribusiness, Inc. Bag retrieval assembly and bag for pressed bales
US20090241474A1 (en) * 2008-03-03 2009-10-01 Actis Bradley P Bagging assembly
US9193490B2 (en) * 2008-03-03 2015-11-24 H.W.J. Designs For Agribusiness, Inc. Bag retrieval assembly and bag for pressed bales
US9352867B2 (en) * 2008-03-03 2016-05-31 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US9463885B2 (en) * 2008-03-03 2016-10-11 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US10631465B2 (en) 2008-03-03 2020-04-28 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US10709068B2 (en) 2008-03-03 2020-07-14 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US11439071B2 (en) 2008-03-03 2022-09-13 H.W.J. Designs For Agribusiness, Inc. Bagging assembly
US20170183111A1 (en) * 2015-12-28 2017-06-29 Poongsan Corporation Apparatus for packing ammunition carton in pouch
US10131454B2 (en) * 2015-12-28 2018-11-20 Poongsan Corporation Apparatus for packing ammunition carton in pouch
US20170233119A1 (en) * 2016-01-04 2017-08-17 Roland Lomerson, Jr. Quad Wicket Exchange System
CN112950866A (zh) * 2021-01-28 2021-06-11 深圳市百佳华百货有限公司 一种扫码购物系统用扫码购物装置

Also Published As

Publication number Publication date
DE602006000800T2 (de) 2009-03-05
EP1746027B1 (en) 2008-03-26
DE602006000800D1 (de) 2008-05-08
ES2301139T3 (es) 2008-06-16
JP2007022627A (ja) 2007-02-01
EP1746027A1 (en) 2007-01-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DAISEY MACHINERY CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHIKATANI, HAJIME;REEL/FRAME:018058/0756

Effective date: 20060612

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION