US3277798A - Method of producing a square bottom container - Google Patents

Method of producing a square bottom container Download PDF

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Publication number
US3277798A
US3277798A US397951A US39795164A US3277798A US 3277798 A US3277798 A US 3277798A US 397951 A US397951 A US 397951A US 39795164 A US39795164 A US 39795164A US 3277798 A US3277798 A US 3277798A
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US
United States
Prior art keywords
flap
tube
side walls
corners
side wall
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
US397951A
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English (en)
Inventor
Krauss Richard Adolf
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.)
Korsnas GmbH
Original Assignee
Korsnas GmbH
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 Korsnas GmbH filed Critical Korsnas GmbH
Application granted granted Critical
Publication of US3277798A publication Critical patent/US3277798A/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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916—Pliable container
    • Y10S493/936—Square bottom

Definitions

  • the invention relates to a method of producing a square bottom sack, bag, box or similar container of paper, cardboard, cloth, plastic or similar material, and the object of the invention is primarily to provide, in a simple manner, entirely tight container bottom having a very good strength.
  • the flexible sheet material is folded and cemented to form a flat tube having two opposite side walls conected by intermediate bellowsfolds.
  • one of the side walls is formed with a flap extending a short distance in the longitudinal direction of the tube between the end portions of the bellows-folds, said flap having a width substantially corresponding to the space between the bottoms of the folds in the flattened state of the tube.
  • the end portion of the other side wall opposite to said flap is formed correspondingly shorter, and the flap is folded and fixed to said shorter end of the other side wall so as to close the central part of the tube end.
  • the bellows-folds are opened into planes substantially perpendicular to the plane of the central portions of the side walls, and the four corners are folded onto adjacent side walls along lines extending at an angle of about 45 from the ends of the line where the closure flap is folded onto the longitudinal edges of the side walls so as to cause the projecting portions of the corners to overlap the central closure flap at least partly.
  • said folded corners are fixed to the surfaces of the flap and of the side walls, so that a closed bottom is obtained.
  • the special cutting of the material required for the bottom folding according to the invention may be carried out either before or after the material is formed into a tube.
  • rather short slits are cut into the side walls from one end of the tube in parallel and close to the bottoms of the bellows-folds, whereby each side wall is provided with a flap.
  • One of these flaps may then be cut off or folded into the tube, while the other one is used as closure flap.
  • the container may be made of one or more plies of material, and when using several plies they may in the known way be staggered at the ends of the tube so that unnecessary bulks are avoided in the bottom area.
  • FIGURE 1 shows a perspective view of a sack tube provided with bellows-folds
  • FIGURES 1A and 1B show side views of modified embodiments of one tube end
  • FIGURE 2 shows a side view of a flattened tube with the bottom flap folded over
  • FIGURES 2A and 2B show modified embodiments
  • FIGURE 2C illustrates a special method in connection with FIG. 2;
  • FIGURE 3 shows a perspective view of the tube with the bellows-folds opened and the corners partly folded;
  • FIGURE 4 shows the finished sack in flattened condition
  • FIGURE 5 shows the sack in opened condition.
  • the flattened sack tube has two side walls 6 and 7 connected by walls 8a, b and 9a, 11 forming bellows-folds. From one end of the tube two slits 10, 11 are cut in either side wall 6 or 7 in parallel and close to the bottom edges 12, 13 of the bellows-folds, said slits forming two end flaps 14, 15, one in each side wall 6 and 7, respectively.
  • the total length of the two slits 10, 11 should be at most equal to the distance between the bellows-bottoms 12, 13 and is preferably less.
  • the plies may in the known way be staggered at the tube end, as indicated in FIG. 1A, where the upper side wall is shown as composed of three staggered or stepped plies 6a, 6b, 60.
  • FIGURE 1B shows a modified embodiment in which one end flap 15' projects slightly from the tube end. Of course, staggering is possible also in this case, if several plies of material are used.
  • one end flap 14 is folded inwards along the dashed line 16 in FIG. 1 and is pasted to the inside of either side wall 6 or 7. In many cases, however, it would be more simple and quite as advantageous to cut off the flap 14 along the line 16. Then the other flap 15 is folded over the opposite side wall 6 along the same line 16 and is pasted to the exterior of said side wall 6, as shown in FIG. 2, thus closing the central portion of the tube end. If the extended end flap 15' shown in FIG. 1B is used, the closure will be further reinforced, but as a rule it should not be necessary.
  • the tube may 'be stamped with folding lines 17 (FIG. 2) which extend from the inner ends of the slits 10, 11, Le. from the ends of the folding line 16, diagonally outwards to the longitudinal edges of the tube.
  • FIGURE 2A shows a special staggering which may be suitable to avoid unnecessary bulks at the following bottom folding.
  • the areas of the side walls 6, 7 located on both sides of the flaps 14, 15 have been cut away (at 18) in aiignment with the folding line 16 of the closure flap 15 so that only the bellows-forming walls 811, b and 9a, b project at the tube end.
  • This cutting operation may be carried out at any time during the operations described above, but is preferably done in connection with the cutting of the flaps 14, 15.
  • FIGURE 2B indicates a slightly modified staggering in that the cuts 18' do not reach the longitudinal edges of the tube but leave narrow strips 19 of the side walls 6, 7 close to the bellows folds.
  • a binding agent is, at a suitable time, applied to the surfaces to be cemented together.
  • binding agent is introduced between the interior of the walls 8, 9 and the interior of the side walls 6, 7 up to the folding lines 17 and, further, binding agent is applied to the exterior of the side wall portions located outside the folding lines 17.
  • binding agent is then simultaneously applied to the portions of the bellows-folds exposed by the staggering.
  • the whole of the shaded portions of the two sides of the tube may be coated with a binding agent, as indicated in FIG. 2C.
  • the two bellows-folds are opened by bending the walls 8a, b and 9a, b and adjacent parts of the side walls 6, 7 approximately perpendicularly to the still flat middle portions of the side walls, so that the tube gets an H-shaped cross section.
  • the two corners 20 located outside the folding lines 17 are folded inwards to adjacent parts of the side walls 6, 7 at the same time as the bellowsfolds 8, 9 are again flattened successively, as the folding proceeds.
  • the flattened container has the appearance shown in FIG. 4.
  • the rectangular outer portions of the corners overlap partly the bottom flap while forming transverse reinforcements extending over the whole width of the bottom and thus providing an effectively sealing bottom closure.
  • FIGURE 5 shows the container in expanded condition. Two opposite edges of the rectangular bottom have been formed along the transverse edges 22 of the corner portions in FIG. 4, and the other two bottom edges have been formed by folding the walls 8, 9 along a dashed line 23 indicated in FIG. 3.
  • the slits 10, 11 may be made long enough to permit the folded corners 20 to touch each other at the middle of the bottom flap 15 which is then entirely covered.
  • such a design is by no means necessary for obtaining a bottom with great strength and probably it is not even to prefer.
  • the tube shown in FIG. 1A or 1B may be made from an endless web of material in a tube forming machine and, if desired, such a machine may be supplemented by folding mechanisms required for making the bottom closure described. Alternatively, a separate bottom folding machine may be used.
  • a method of producing square bottom containers comprising forming a flexible sheet material into a flat tube having two opposite side walls connected by intermediate longitudinal bellowsfolds, forming on one side wall a flap extending a short distance in the longitudinal direction of the tube between the end portions of the bellows-folds and having a width substantially corresponding to the space between the bottoms of said folds in the flattened state of the tube, forming the end portion of the other side wall opposite to the flap correspondingly shorter, folding said flap over and securing it to said end of the other side wall so as to close the central part of the tube end, opening the bellows- -folds into planes substantially perpendicular to the plane of the central portions of the side walls, folding the four corners onto adjacent side walls along lines extending at an angle of about from the ends of the closure flap folding line onto the longitudinal edges of the side walls so as to cause the projecting portions of the corners to overlap the central closure flap at least partly, and securing said folded corners to the surfaces of
  • closure flap is dimensioned a little longer than the tube end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
US397951A 1963-09-26 1964-09-21 Method of producing a square bottom container Expired - Lifetime US3277798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK50931A DE1245275B (de) 1963-09-26 1963-09-26 Boden fuer ein- oder mehrlagige Saecke, Beutel, Tragtaschen oder sonstige Behaeltnisse aus Papier, Pappe, Kunststoffolien, Gewebe, Metallfolien od. dgl. und Verfahren zuseiner Herstellung

Publications (1)

Publication Number Publication Date
US3277798A true US3277798A (en) 1966-10-11

Family

ID=7225814

Family Applications (1)

Application Number Title Priority Date Filing Date
US397951A Expired - Lifetime US3277798A (en) 1963-09-26 1964-09-21 Method of producing a square bottom container

Country Status (9)

Country Link
US (1) US3277798A (da)
AT (1) AT268854B (da)
BE (1) BE653554A (da)
CH (1) CH422501A (da)
DE (1) DE1245275B (da)
DK (1) DK105449C (da)
FI (1) FI44869C (da)
GB (1) GB1025535A (da)
NL (1) NL6411207A (da)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361335A (en) * 1966-05-27 1968-01-02 Phillips Petroleum Co Bag and method of forming same
US4498192A (en) * 1983-01-28 1985-02-05 Mid America Machine Corp. Bag having an overlapped closure and method of fabricating the same
US4561107A (en) * 1979-05-11 1985-12-24 Wavin B.V. Web of plastic bags
US4705707A (en) * 1985-12-17 1987-11-10 Presto Products, Incorporated Polyethylene/polyester nonoriented heat sealable moisture barrier film and bag
US4716061A (en) * 1985-12-17 1987-12-29 Presto Products, Incorporated Polypropylene/polyester nonoriented heat sealable moisture barrier film and bag
US4765999A (en) * 1985-07-26 1988-08-23 Presto Products, Incorporated Polyester/copolyester coextruded packaging film
US4946743A (en) * 1987-06-26 1990-08-07 Reynolds Consumer Products, Inc. Nonoriented polyester films for lidding stock with modified heat seal layer
US5236531A (en) * 1988-05-17 1993-08-17 Altech Co., Ltd. Manufacturing method of square bottom containers
US5547284A (en) * 1992-06-04 1996-08-20 Imer; Rodney H. Bag for liquids, pastes, or granulates and method of manufacturing
WO1997035783A1 (de) * 1996-03-27 1997-10-02 Bloemer Maria Verpackung mit einer durch faltung erzeugbaren kopf- und/oder bodenfläche
US6186932B1 (en) * 1998-07-16 2001-02-13 Stedim, Z. I. Des Paluds Sachets for bio-pharmaceutical fluid products
US20020131654A1 (en) * 2001-03-19 2002-09-19 Smith Sidney T. Large volume flexible container
US20030029982A1 (en) * 2001-03-19 2003-02-13 Hurst William S. Container support
US6659132B2 (en) 2001-03-19 2003-12-09 Baxter International Inc. Gas permeable sterile closure
US7384783B2 (en) 2004-04-27 2008-06-10 Baxter International Inc. Stirred-tank reactor system
DE102012106577A1 (de) * 2012-07-20 2014-01-23 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Verpackung, insbesondere Schlauchbeutelverpackung, mit im Wesentlichen rechteckigem Boden sowie Verfahren zur Herstellung derselben

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO138134C (no) * 1976-06-28 1978-07-12 Norsk Hydro As Fleksibel beholder for transport og lagring av massegods, samt fremgangsmaate for dens fremstilling
US5580173A (en) * 1994-06-10 1996-12-03 Sebastian; James Folding bag
JPWO2021193827A1 (da) * 2020-03-26 2021-09-30

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US711369A (en) * 1900-06-28 1902-10-14 Union Paper Bag Machine Co Paper-bag machine.
US1015007A (en) * 1911-10-28 1912-01-16 David Cutler Paper bag.
US2314819A (en) * 1939-10-14 1943-03-23 Bemis Bro Bag Co Closure
US2957394A (en) * 1956-09-28 1960-10-25 Bemis Bro Bag Co Bag

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE144506C (da) * 1900-01-01
DE257203C (da) *

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US711369A (en) * 1900-06-28 1902-10-14 Union Paper Bag Machine Co Paper-bag machine.
US1015007A (en) * 1911-10-28 1912-01-16 David Cutler Paper bag.
US2314819A (en) * 1939-10-14 1943-03-23 Bemis Bro Bag Co Closure
US2957394A (en) * 1956-09-28 1960-10-25 Bemis Bro Bag Co Bag

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361335A (en) * 1966-05-27 1968-01-02 Phillips Petroleum Co Bag and method of forming same
US4561107A (en) * 1979-05-11 1985-12-24 Wavin B.V. Web of plastic bags
US4636190A (en) * 1979-05-11 1987-01-13 Wavin B.V. Apparatus for manufacturing a web of plastic bags
US4783178A (en) * 1979-05-11 1988-11-08 Wavin, Bv Method of manufacturing a web of plastic bags
US4498192A (en) * 1983-01-28 1985-02-05 Mid America Machine Corp. Bag having an overlapped closure and method of fabricating the same
US4765999A (en) * 1985-07-26 1988-08-23 Presto Products, Incorporated Polyester/copolyester coextruded packaging film
US4705707A (en) * 1985-12-17 1987-11-10 Presto Products, Incorporated Polyethylene/polyester nonoriented heat sealable moisture barrier film and bag
US4716061A (en) * 1985-12-17 1987-12-29 Presto Products, Incorporated Polypropylene/polyester nonoriented heat sealable moisture barrier film and bag
US4946743A (en) * 1987-06-26 1990-08-07 Reynolds Consumer Products, Inc. Nonoriented polyester films for lidding stock with modified heat seal layer
US5236531A (en) * 1988-05-17 1993-08-17 Altech Co., Ltd. Manufacturing method of square bottom containers
US5547284A (en) * 1992-06-04 1996-08-20 Imer; Rodney H. Bag for liquids, pastes, or granulates and method of manufacturing
WO1997035783A1 (de) * 1996-03-27 1997-10-02 Bloemer Maria Verpackung mit einer durch faltung erzeugbaren kopf- und/oder bodenfläche
US6186932B1 (en) * 1998-07-16 2001-02-13 Stedim, Z. I. Des Paluds Sachets for bio-pharmaceutical fluid products
US20020131654A1 (en) * 2001-03-19 2002-09-19 Smith Sidney T. Large volume flexible container
US20030029982A1 (en) * 2001-03-19 2003-02-13 Hurst William S. Container support
US20030075662A1 (en) * 2001-03-19 2003-04-24 Hurst William S. Container support
US6659132B2 (en) 2001-03-19 2003-12-09 Baxter International Inc. Gas permeable sterile closure
US7025318B2 (en) 2001-03-19 2006-04-11 Baxter International Inc. Container support
US7188744B2 (en) 2001-03-19 2007-03-13 Baxter International Inc. Container support
US7384783B2 (en) 2004-04-27 2008-06-10 Baxter International Inc. Stirred-tank reactor system
DE102012106577A1 (de) * 2012-07-20 2014-01-23 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Verpackung, insbesondere Schlauchbeutelverpackung, mit im Wesentlichen rechteckigem Boden sowie Verfahren zur Herstellung derselben

Also Published As

Publication number Publication date
FI44869B (da) 1971-09-30
GB1025535A (en) 1966-04-14
NL6411207A (da) 1965-03-29
DE1245275B (de) 1967-07-20
FI44869C (fi) 1972-01-10
BE653554A (da) 1965-01-18
CH422501A (de) 1966-10-15
DK105449C (da) 1966-09-26
AT268854B (de) 1969-02-25

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