US3795080A - Method for packaging - Google Patents

Method for packaging Download PDF

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Publication number
US3795080A
US3795080A US00192021A US3795080DA US3795080A US 3795080 A US3795080 A US 3795080A US 00192021 A US00192021 A US 00192021A US 3795080D A US3795080D A US 3795080DA US 3795080 A US3795080 A US 3795080A
Authority
US
United States
Prior art keywords
web
sheets
tearstrip
package
sealing
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
US00192021A
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English (en)
Inventor
A Smolderen
J Cappuyns
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of US3795080A publication Critical patent/US3795080A/en
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
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements
    • B65D75/68—Inserted or applied tearing-strings or like flexible elements extending through wrapper closure or between wrapper layers
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/182—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying tear-strips or tear-tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125—Applying strips or strings, e.g. tear strips or strings
    • B31B50/8126—Applying strips or strings, e.g. tear strips or strings parallel to the direction of movement of the webs or the blanks

Definitions

  • the present invention relates to a packaging method for sheet material as, e.g., photographic sheet material wherein at least one tearstrip is fitted at the innerside of the package.
  • a method for packaging photographic sheets comprising the steps of tightly enclosing the photographic sheets between two rectangular sheets of wrapping material cut from webs of such material, and securing the marginal portions of these sheets of wrapping material together, e.g., by adhesion or heatsealing.
  • a tearstrip which has been provided at the innerside of one longitudinal margin of the wrapping permits the easy opening of the package.
  • the package can be opened by pulling away a corner of the wrapping atone extremity of the longitudinal margin where the tearstrip is provided. Since the tear- A strip passes through such corner piece and is attached thereto, said corner piece providesfor a firm hold when tearing up thelongitudinal margin of the wrapping by means of the tear strip whereby a free access to the packaged sheets is obtained.
  • the object of the packaging method according to the present invention is to provide a package which can be opened in the dark in a simple way without any auxiliary means.
  • a method for packaging sheets wherein said sheets are packaged in packaging material which forms a wrapping round the sheets which is closed by flap portions at two opposite edges of the sheets, and wherein at least one tearstrip is inserted between the packaging material and the packaged sheets, said tearstrip extending from one flap portion to the other,.is characterised in that a loop of said tearstrip is punched through one side of at least one of said flap portions.
  • the tearstrip is adhered to the innerside of the packaging material before the sheets to be packaged are placed thereon, and the loopin the tearstrip is punchedimmediately before the tearstrip is adhered to the packaging material.
  • a slit is cut in a flap portion of the package at a loca tion close to a tearstrip and'at the side thereof remote from the edge of the package, the slit extending generally parallel to the tearstrip and having a length which is smaller than the width of the flap portion.
  • sheets applies to one single sheet only, as well as to stacks of sheets.
  • the sheets may be of light-sensitive material, such as photographic paper or film, and also of material for use in electrophotography, such as paper coated with a semi-conducting material, or even common paper.
  • the packaging material may be in the form of sheets, but the packaging material may also be in the form of rial and a secondweb 23 of wrapping material, are
  • FIG. 4 shows apackage produced according to the method of the invention
  • FIG. 5 illustrates more clearly a corner of the package of FIG. 4.
  • FIG. 1 The embodiment of FIG. 1 comprises a basic part 10, a support 11 mounted at one side on said basic part and several smaller supports at the opposite side on said basic part for supporting several parts of the apparatus.
  • rollers 12 and 22 are freelyrotatable and they bear cores onto which a first web 13 of wrapping matewound respectively.
  • Two rollers 14 and 15 are mounted so that they are freely rotatable and hold each a roll of small tapes l6 and 17, respectively.
  • Two welding means 18 and 19 comprise each an electric heating element which heats a metal core ending in the welding pins 20 and 21. Said pins exert a pressure on the side of the web 13 opposite to the side which, together with the tapes l6 and 17, is passed over the free-turning roller 24.
  • the punch 50 is attached to a piston 51 of a cylinder 52 and serves the purpose'of simultaneously perforat ing the web 13 and pressing a loop of about 10 to 20 mm long in the tape 16 respectively 17 through the perforation 29 of the web 13.
  • a punching device is illustrated on FIG. 1.
  • the shape of the punch is shown in more detail on FIGS. 2 and 3.
  • first folding members 25 and 26 fold the margins of the web 13 upwardly over Second folding means 27, 28 fold the extremities of said upwardly folded margins again over 90 so as to locate them in a horizontal plane.
  • Stack positioning means is provided which is indicated by the numeral 30 and which in a known way comprises two parallel rows of vertical fingers which cyclically can approach horizontally to each other over a given distance and then remove vertically from the web, so as to properly align the sheets of the stacks, which the operator has been placed on the web between the said fingers in the longitudinal direction of the web and to properly space the successive stacks on the web.
  • a roller 31 which is stationarily fitted on a freeturning shaft 32 presses on the central part of the stacks as they pass under it.
  • the stacks are flexed thereby, since the upper side of the basic part 10 is progressively concavely curved in the transverse direction from behind the stack positioning means 30 up to the said roller 31, and the upstanding portions of the second folding members 27 and 28 slightly approach towards each other.
  • the second web 23 of wrapping material is passed over the free-turning roller 33 and it is applied with its margins onto the folded extremities of the margins of the first web.
  • the welding means 34 and 35 provided with welding pins similar to those of the welding means 18 and 19, exert a pressure on the margins of the web 23.
  • the roller system 36 comprises two horizontal rows of driven rollers which engage a wrapped stack at either side thereof in order to advance the webs at a uni form speed and to flatten the stack, thereby tensioning the wrapping around the stack.
  • the transverse sealing means 37 comprises an upper transverse sealing bar 38, moved by a pneumatic cylinder 39, and a cooperating lower sealing bar (not shown) which can approach towards each other and press onto each other in a plane which is located half the height of the-wrapped stacks.
  • the sealing bars are provided at their cooperating faces with an electrically heated flat resistance'wire, which is covered with a strip of Teflon fabric (Teflon is registered trade mark of E. I. du Pont de Nemours & Co., Wilmington, Del., U.S.A.).
  • Teflon is registered trade mark of E. I. du Pont de Nemours & Co., Wilmington, Del., U.S.A.
  • the sealing means 37 is effective to produce a crimped seal extending in the form of a band transversely across the assembled webs between successive sheets.
  • a transverse cutting means 40 comprises an upper severing knife 4] moved by a pneumatic cylinder 42 and a cooperating lower knife (not shown) which can approach towards each other so as to separate the successive packaged stacks.
  • an auxiliary cutter (not shown) may be mounted in such a way that a corner piece of the sealed part can be cut half-way or scored close to the spot where the loop of-one of the tapes 16 and 17 is pressed through the perforation to the outer side of the web 13 by means of the punch 50.
  • the auxiliary cutter cooperates with the cutting means
  • the sealing means 37 and the cutting means 40 are both mounted on a carriage 43 which is supported by guide rails 44.
  • the carriage is cylically moved to the left hand side, according to FIG. 1, at the speed of travel of the webs over a distancewhich is shorter than thedistance between two successive stacks, and thereafterit is returned at increased speed to the right hand side, according to FIG. '1, in order to start a next cycle.
  • the said movements are imparted to the carriage by the chain. being cyclically driven by motor means in either direction. Motor means of the present kind are well-known in the art and have. therefore not been represented here.
  • the first web 13 has a width of 34 cm
  • the second web 23 has a width of 25 cm.
  • Both webs are composed of three adhering superposed layers, viz. an opaque paper layer, an aluminium layer and a black polyethylene layer. Suchlike materials permit to package film sheets so that they are fully protected against moisture, chemical vapours and light.
  • the web 13 is wound on the roll 12 the polyethylene layer at the inside
  • the web 23 is wound on the roll 22 the polyethylene layer at the outside.
  • the tapes 16 and 17 consist of a tough kind of paper, they have a width of 3 mm and a thickness of some tenths of a millimetre.
  • the webs 13 and 23 are continuously pulled from the rolls 12 and 22 by the driven rollers 36 being always in contact with at least one wrapped stack.
  • the operator places a stack of sheets on the advanc ing web 13 between the positioning'rneans 30, the longitudinal direction of the sheets extending transversely of the web.
  • the opposed transverse edges of the sheets engage the upstanding marginal portions of the web 13.
  • the tapes l6 and 17 remain in place at the inside of the upstanding marginal portions of the web when inserting the stack since they have been secured to the polyethylene layer of the web 13 by means of the welding pins 20 and 21 which weaken the polyethylene layer and press the web against said tapes.
  • the opposed longitudinal edges of the sheets of the stack are aligned by the stack positioning means 30 which after the aligning operation vertically remove from the web so as to let the stack pass by.
  • the stack of sheets is continuously advanced in flat condition by the web 13 until reaching the flexing roller 31. Immediately before this roller is reached the extremities of the upstanding margins of the .web 13 have come into contact with the second folding members 27, 28 which progressively fold said'extremities towards each other. 4
  • the flexing of the stack is permitted by the concave upper side of the basic part 10 as described hereinbefore.
  • the flexing of the stack is assisted by the vertical portions of the folding members 27, 28 which slightly converge so as to exert pressure on the opposed edge faces of the stack.
  • the stack passes under the sealing means 34, 35.
  • the web 23 is heated by the sealing means 34, 35 over a small path, so that its thermoplastic layer at the opposite side softens. Together with the pressure exerted by the sealing means, a tight joint is formed between the extremities of both webs.
  • the tensioning of the webs in the longitudinal direction suffices to ensure a sufficient stiffness of the web portions between the successive stacks so that the webs are also well sealed to each other at those areas when passing under the sealing means 34, 35.
  • a magnetic valve is opened, and air-pressure is admitted to the cylinder 39 so that the sealing bar 38 and the cooperating lower sealing bar approach to each other and weaken and seal the web portions extending just in front of the wrapped stack in a direction normal to that of the tearstrip.
  • the opening of the valve may be triggered by sensing means 47 comprising a microswitch which is actuated'by a lever, said lever being strongly biased so that the small roller, fitted at its extremity and running over the lower web, depresses slightly the web when a it.
  • Said roller is positioned at about 0.5 cm after the vertical plane through the two sealing bars, and as it depresses the web when rolling over the trailing edge of the preceding stack, the sealing bars seal the webs right web portion between two successive stacks passes over in the middle of the spacing between said preceding also the means driving the carriage was started and the carriage 43 moves to the left at a speed equal to that of the webs.
  • the electric circuit of the magnetic valve controlling the cylinder 39 remains closed by a delaying relay so that when the small roller rolls on the following stack, the sealing means remains operative.
  • the carriage After moving over a distance of about five centimetres the carriage, by an upstanding leg, actuates the microswitch 48, the electric contact of which controls a magnetic valve in the air-pressure supply of the cylinder 42.
  • the transverse cutting means 40 is operated and separates two successive packages.
  • the closed A package 80 produced according to the present invention is shown in FIG. 4. At one end of both longitudinal sides the loop 70 formed by the perforation of the web 13 during the punching process emerges from the heat-sealed portion 72 at about to mm from the edge.
  • FIG. 5 The structure of a corner is more clearly illustrated in FIG. 5.
  • a small portion 73 limited by the incision 71 is cut out to about half of the thickness without affecting however the light-tightness of the package.
  • the package according to FIG. 4 is opened as follows.
  • the package is taken, e.g.,.with the left hand and the half-way cut corner piece 73 at the right hand bottom place according to FIG. 5 is gripped with thumb and fore-finger of the right hand.
  • the corner piece 73 is very easily torn off the package 80 by a simple separation movement of the hands.
  • tuation of the punch 50 is obtained by admitting pressurized air passinto the cylinder 5 52, causing a piston located in the cylinder to move downwards and to perforate the web 13. This actionis facilitated with the help of two tapered points 54 and 55. At the same time the stubbed part 56 between said points grips the tape 17 thus forming a loop in same in the hole 58 during a very short time lapse.
  • the punching device is fixed on a support 53.
  • the tearstrips 16, 17' may be applied at only one' side of the stacks.
  • Feeding means mayflbe provided for feeding other strips, sheets or webs in the package, e.g. colour strips for characterizing the type of material contained in the package, thin lead foils in the packaging of single radiographic film sheets for use as intensifying screen, etc.
  • means may be provided for automatically fee'dingthe sheets or the stacks of. sheets to be wrapped successively onto the first web, so that the apparatus may operate completelyautomatically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Packages (AREA)
  • Making Paper Articles (AREA)
  • Basic Packing Technique (AREA)
  • Packaging Of Special Articles (AREA)
US00192021A 1970-10-26 1971-10-26 Method for packaging Expired - Lifetime US3795080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5083570A GB1368063A (en) 1970-10-26 1970-10-26 Packaging method and package

Publications (1)

Publication Number Publication Date
US3795080A true US3795080A (en) 1974-03-05

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ID=10457570

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Application Number Title Priority Date Filing Date
US00192021A Expired - Lifetime US3795080A (en) 1970-10-26 1971-10-26 Method for packaging

Country Status (6)

Country Link
US (1) US3795080A (de)
BE (1) BE774378A (de)
DE (1) DE2152910A1 (de)
FR (1) FR2113227A5 (de)
GB (1) GB1368063A (de)
SU (1) SU477573A3 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364478A (en) * 1980-03-14 1982-12-21 Sig - Schweizerische Industrie-Gesellschaft Manufacture of easily openable foil bag
US4693365A (en) * 1985-04-15 1987-09-15 Corella Arthur P Package, instrumentation, system and method for packaging flaccid items, filaments and the like
US4872302A (en) * 1986-02-27 1989-10-10 Borden Bv Method of, and apparatus for, wrapping articles in a plastic film
US4969309A (en) * 1989-01-27 1990-11-13 Kramer & Grebe Canada, Ltd. Method and apparatus for producing resealable packages
US5239805A (en) * 1991-08-29 1993-08-31 Sharp Kabushiki Kaisha Method of packing a developer cartridge
US5477310A (en) * 1994-05-09 1995-12-19 Polaroid Corporation Film package
US5633113A (en) * 1995-04-14 1997-05-27 Polaroid Corporation Mass transfer imaging media and methods of making and using the same
US20030233813A1 (en) * 2002-06-25 2003-12-25 Leslie Wayne Grant Process of making a wrapped tampon
US7331153B1 (en) * 2006-08-31 2008-02-19 Sealed Air Corporation (Us) Apparatus and method for creating easy to open packages
US20180344122A1 (en) * 2017-06-02 2018-12-06 KM Corp. Wiper kit for cleaning
US10364055B2 (en) 2013-07-24 2019-07-30 Ulma Packaging Technological Center S. Coop. Packaging machine and method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD102571A1 (de) * 1972-07-03 1973-12-20
DE2803050A1 (de) * 1978-01-25 1979-08-02 Franke & Co Optik Gmbh Verpackung fuer kassette
AU556666B2 (en) * 1983-02-18 1986-11-13 Tani, K. Tear string for bag
DK0471211T3 (da) * 1990-08-13 1995-05-29 Nestle Sa Bøjelig emballage som er nem at åbne og som indeholder mozzarella, samt fremgangsmåde ved emballering
GB9222744D0 (en) * 1992-10-29 1992-12-09 Carrs Paper Ltd Wrapping elongate articles
DE102009060497A1 (de) * 2009-12-23 2011-06-30 Dürr Dental AG, 74321 Vorrichtung zum Einschließen eines flachen Objektes, insbesondere einer Speicherfolie, in eine Schutzhülle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US180773A (en) * 1876-08-08 Improvement in envelopes
US2109505A (en) * 1934-07-24 1938-03-01 Hoffman Beverage Company Wrapping machine
DE910634C (de) * 1951-12-09 1954-05-03 Hoffmann Cyklop Klebstreifen zum Verschliessen von Packstuecken, der mit einem in seiner Laengsrichtung verlaufenden Aufreisfaden versehen ist
US3411263A (en) * 1965-03-31 1968-11-19 Agfa Gevaert Nv Method and apparatus for packaging sheets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US180773A (en) * 1876-08-08 Improvement in envelopes
US2109505A (en) * 1934-07-24 1938-03-01 Hoffman Beverage Company Wrapping machine
DE910634C (de) * 1951-12-09 1954-05-03 Hoffmann Cyklop Klebstreifen zum Verschliessen von Packstuecken, der mit einem in seiner Laengsrichtung verlaufenden Aufreisfaden versehen ist
US3411263A (en) * 1965-03-31 1968-11-19 Agfa Gevaert Nv Method and apparatus for packaging sheets

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364478A (en) * 1980-03-14 1982-12-21 Sig - Schweizerische Industrie-Gesellschaft Manufacture of easily openable foil bag
US4693365A (en) * 1985-04-15 1987-09-15 Corella Arthur P Package, instrumentation, system and method for packaging flaccid items, filaments and the like
US4872302A (en) * 1986-02-27 1989-10-10 Borden Bv Method of, and apparatus for, wrapping articles in a plastic film
US4969309A (en) * 1989-01-27 1990-11-13 Kramer & Grebe Canada, Ltd. Method and apparatus for producing resealable packages
US5239805A (en) * 1991-08-29 1993-08-31 Sharp Kabushiki Kaisha Method of packing a developer cartridge
US5602621A (en) * 1994-05-09 1997-02-11 Polaroid Corporation Film package and method
US5477310A (en) * 1994-05-09 1995-12-19 Polaroid Corporation Film package
US5633113A (en) * 1995-04-14 1997-05-27 Polaroid Corporation Mass transfer imaging media and methods of making and using the same
US5756249A (en) * 1995-04-14 1998-05-26 Polaroid Corporation Mass transfer imaging media and methods of making and using the same
US20030233813A1 (en) * 2002-06-25 2003-12-25 Leslie Wayne Grant Process of making a wrapped tampon
US7331153B1 (en) * 2006-08-31 2008-02-19 Sealed Air Corporation (Us) Apparatus and method for creating easy to open packages
US20080053041A1 (en) * 2006-08-31 2008-03-06 Sealed Air Corporation (Us) Apparatus and method for creating easy to open packages
US10364055B2 (en) 2013-07-24 2019-07-30 Ulma Packaging Technological Center S. Coop. Packaging machine and method
US20180344122A1 (en) * 2017-06-02 2018-12-06 KM Corp. Wiper kit for cleaning

Also Published As

Publication number Publication date
FR2113227A5 (de) 1972-06-23
DE2152910A1 (de) 1972-05-04
GB1368063A (en) 1974-09-25
SU477573A3 (ru) 1975-07-15
BE774378A (nl) 1972-04-24

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