US3362608A - Liquid-tight closure for a parallelepipedic package - Google Patents

Liquid-tight closure for a parallelepipedic package Download PDF

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Publication number
US3362608A
US3362608A US548220A US54822066A US3362608A US 3362608 A US3362608 A US 3362608A US 548220 A US548220 A US 548220A US 54822066 A US54822066 A US 54822066A US 3362608 A US3362608 A US 3362608A
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US
United States
Prior art keywords
package
flaps
wafers
closure
liquid
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Expired - Lifetime
Application number
US548220A
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English (en)
Inventor
Dilot Rolf Magnus
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Akerlund and Rausing AB
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Akerlund and Rausing AB
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Publication of US3362608A publication Critical patent/US3362608A/en
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    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
    • B65D5/563—Laminated linings; Coatings
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/0272—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end closures formed by applying a web on the edge of the body, and subsequent inward folding of flaps

Definitions

  • a parallelepipedic package is constituted by a bottom wall, four side walls and four ends closure flaps joined by fold lines to the side walls at the end of the package opposite the bottom wall. After the package is filled through the end opening a pair of superposed cover sheets are applied across the end opening and the marginal portions of the end flaps, these then being in their outfolded position.
  • the inner positioned cover sheet is relatively thin and stretchable, the outer cover sheet is relatively stiff in comparison with the inner cover sheet.
  • the two cover sheets are secured to each other along the marginal portions of the end flaps and are also secured to these marginal portions but are separate from each other throughout substantially the entire area represented by the end opening.
  • the inner cover sheet being stretchable serves to absorb the tension forces created when the end flaps are infolded without adversely affecting the seal and the outer cover sheet serves as a protection for the inner one.
  • the present invention refers to a package closure, more partciularly a package closure in which closely sheets extending across an opening in the package are subjected to tensions through folding or otherwise.
  • closing sheets so called wafers
  • openings e.g. pouring openings
  • a closing sheet of a material impervious to liquids has often been arranged across said opening.
  • this material has consisted of a thermoplastic material which normally satisfies the requirements of imperviousness to liquids.
  • tension stresses e.g., by folding
  • the present invention refers to a new and practical method of solving the above mentioned difficulties by a package closure of the kind mentioned which is characterized in that the closing sheets which are larger than the package opening are at least two in number and that they are connected to each other at a joint along the circumference of the opening, and that one of the closing sheets is fixed at said joint to the package material around the opening, while the closing sheets at least Within the major part of the region of the opening are not fixed to each other.
  • FIG. 1 shows a perspective view of a package box having unfolded end flaps, illustrating the closure according to the preferred embodiment
  • FIG. 2 shows the same package box having folded-in end flaps
  • FIG. 3 shows an enlarged section AA in FIG. 2.
  • FIGURES 1 and 2 designates a package box having visible side walls 2 and 3, concealed side walls 4 and 5, a concealed bottom wall and a top consisting of four flaps 6, 7, 8 and 9 capable of being folded in.
  • flaps 6, 7, 8 and 9 capable of being folded in.
  • One of these flaps, viz flap 6, is provided with two longitudinal perforations, whereby a tear-up strip 10 is obtained.
  • flap 8 In the opposite flap 8 there is provided a substantially semicircular notch 11 so as in, the closed package, to make the tear-up strip 10 easily accessible to the fingers of one hand.
  • the wafers or closing sheets 12 and 13 are fixed Within the regions shadowed in FIG. 1 both to each other and to the underlying package material, i.e. to the flaps 7 and 9 and to the parts 21 and 22 of the flaps 6 and 8, respectively, adjacent the opening of the packages. Above the package opening, i.e. within the region 14, the wafers are not fixed to each other. If considered advantageous, the two wafers may possibly, within a small part of the center portion of the region 14, be fixed to each other without seriously impairing the properties of the closure. The main thing is that a sufiiciently large part of the region 14 has wafer portions which are free in relation to each other. At the box corners 15, 16, 17 and 18 the covering wafers 12 and 13 are besides sealed to the top edges of the side walls in the way disclosed by the Swedish Patent No. 186,301 whereby a completely tight closure is obtained.
  • the package box 1 consists of a two ply material, viz an outer stiff fibrous ma terial 24 determining the package shape and an inner liquid-impervious material 23 which preferably consists of a thermoplastic material, laminated to the fibrous material 24. If considered desirable the package box may obviously instead consist of a plurality of plies of material or of a single one.
  • both wafers 12 and 13 are manufactured from a thermoplastic material. This is of such quality and of such thickness that it is highly stretchable.
  • the outer wafer 13 is intended to be manufactured from a heavier material which takes up normally occurring outer and inner forces and is relatively stiff in relation to the inner wafer 12 and which may consist of cardboard or of a thermoplastic material.
  • both wafers 12 and 13 are manufactured from the same kind of thermoplastic material, which is advantageous from the point of view of sealing, the material thicknesses however being different inasmuch as the inner wafer 12 is thinner than the outer one 13.
  • suitable materials may be mentioned polyethylene, polyvinyl chloride, polypropylene and others. So as to get good sealing between the fold-in flaps 6, 7, 8 and 9 the inner ply 23 of the box material preferably also consists of the same material as the inner wafer 12.
  • the filling material 20 in the package which may be in liquid form will thus be prevented from expanding through the fibrous walls 24 of the package or through the closure as a result of the liquid-impervious materials 23 and 12.
  • the closing sheets or wafers 12 and 13 initially consist of parts of web materials, which preferably are wound on to rollers. As the filled packages are advanced in the packaging machine, pieces of the web materials are continuously applied over the opening of the package and sealed both to each other and to the package by means of sealing members provided therefor. Since the inner ply 23 of the package box and the wafers 12 and 13 consist of the same kind of material, very good scaling is obtained. In connection therewith the said pieces 12 and 13 are also detached from the web materials, whereby the packages get the appearance shown in FIG. 1.
  • the upper flaps of the package box are folded in, the flaps 7 and 9 together with the corresponding parts of the covering wafers 12 and 13 being first folded in and thereupon the flaps 6 and 8 with the parts of said wafers within the regions 21 and 22.
  • the wafers 12 and 13 will thereby be doubled.
  • the portions 21 and 22 will be folded upwards and inwards, portions of the wafers being sealed to the inner ply 23 of the flaps 6 and 8.
  • the flaps 6 and 8 are folded in one over the other with the flap 6 uppermost, whereupon heat is supplied by means of heat sealing members to the part of the flap 6 beyond the tear-up strip 10, whereby the thermoplastic material between the flaps in said regions will melt or be highly softened and stick together causing a sealing between said flaps.
  • the extension in said wafer per unit of surface or length will therefore be very small and will be within tolerable limits. Therefore no break will occur in the inner wafer 12.
  • the outer wafer 13 which is made from a heavier material and which serves as a protection for the inner one may certainly show cracks in the regions of the folds. However, these do not influence the sealing conditions of the closure, because the sealing is mainly established by the inner wafer 12.
  • a parallelepipedic package constituted by a bottom wall, four side walls and four end closure flaps joined respectively by fold lines to said side walls at the end opposite said bottom wall, said fold lines defining the periphery of the end opening into said package for filling the package when said end flaps are in an outfolded position
  • the improvement wherein a pair of superposed inner and outer cover sheets are applied across said end opening and the marginal portions of said end flaps adjacent said fold lines subsequent to filling the package and with said end flaps in their outfolded position, said superposed cover sheets being secured to each other along said marginal portions of said end flaps and being secured also to said marginal portions but being separate from each other throughout substantially the entire area thereof represented by said end opening, said inner cover sheet being relatively thin and stretchable and said outer cover sheet being relatively stiff in comparison with said inner sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Packaging Frangible Articles (AREA)
US548220A 1965-05-12 1966-05-06 Liquid-tight closure for a parallelepipedic package Expired - Lifetime US3362608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE6163/65A SE321435B (is") 1965-05-12 1965-05-12

Publications (1)

Publication Number Publication Date
US3362608A true US3362608A (en) 1968-01-09

Family

ID=20268041

Family Applications (1)

Application Number Title Priority Date Filing Date
US548220A Expired - Lifetime US3362608A (en) 1965-05-12 1966-05-06 Liquid-tight closure for a parallelepipedic package

Country Status (5)

Country Link
US (1) US3362608A (is")
DK (1) DK115605B (is")
GB (1) GB1080036A (is")
NO (1) NO120982B (is")
SE (1) SE321435B (is")

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580483A (en) * 1969-02-20 1971-05-25 Riegel Paper Corp Membrane sealed carton
US4589591A (en) * 1982-11-24 1986-05-20 Tetra Pak International Ab Joint on packing containers and a method and arrangement for the manufacture of the same
US4720015A (en) * 1986-04-30 1988-01-19 International Paper Company Moisture-proof, linerless carton with reclosable top membrane
US4771938A (en) * 1986-07-09 1988-09-20 International Paper Company Carton with reclosable membrane liner
US20120033903A1 (en) * 2009-03-04 2012-02-09 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Paper bag

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2177919A (en) * 1936-09-26 1939-10-31 Owens Illinois Glass Co Method of packaging liquids
US3040959A (en) * 1958-11-21 1962-06-26 Fmc Corp Laminated paper board carton
US3263899A (en) * 1962-10-23 1966-08-02 Container Corp Carton tear strip arrangement with reclosure feature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2177919A (en) * 1936-09-26 1939-10-31 Owens Illinois Glass Co Method of packaging liquids
US3040959A (en) * 1958-11-21 1962-06-26 Fmc Corp Laminated paper board carton
US3263899A (en) * 1962-10-23 1966-08-02 Container Corp Carton tear strip arrangement with reclosure feature

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580483A (en) * 1969-02-20 1971-05-25 Riegel Paper Corp Membrane sealed carton
US4589591A (en) * 1982-11-24 1986-05-20 Tetra Pak International Ab Joint on packing containers and a method and arrangement for the manufacture of the same
US4720015A (en) * 1986-04-30 1988-01-19 International Paper Company Moisture-proof, linerless carton with reclosable top membrane
US4771938A (en) * 1986-07-09 1988-09-20 International Paper Company Carton with reclosable membrane liner
US20120033903A1 (en) * 2009-03-04 2012-02-09 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Paper bag
US20160325905A1 (en) * 2009-03-04 2016-11-10 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Paper bag

Also Published As

Publication number Publication date
GB1080036A (en) 1967-08-23
SE321435B (is") 1970-03-02
NO120982B (is") 1970-12-28
DK115605B (da) 1969-10-20

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