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WO1990009927A1 - A sealed corrugated cardboard package and a method of making it - Google Patents

A sealed corrugated cardboard package and a method of making it Download PDF

Info

Publication number
WO1990009927A1
WO1990009927A1 PCT/DK1990/000061 DK9000061W WO9009927A1 WO 1990009927 A1 WO1990009927 A1 WO 1990009927A1 DK 9000061 W DK9000061 W DK 9000061W WO 9009927 A1 WO9009927 A1 WO 9009927A1
Authority
WO
WIPO (PCT)
Prior art keywords
blank
sheet
corrugated cardboard
package
punched
Prior art date
Application number
PCT/DK1990/000061
Other languages
French (fr)
Inventor
Gert Larsen
Original Assignee
Gert Larsen
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 Gert Larsen filed Critical Gert Larsen
Publication of WO1990009927A1 publication Critical patent/WO1990009927A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B65D65/403—Applications of laminates for particular packaging purposes with at least one corrugated layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/042—Punching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B32B2317/127—Corrugated cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • the invention concerns a sealed package of a punched corrugated cardboard blank for use as a transport or storage package for fresh food as well as a method of making it.
  • a waterproof plas ⁇ tics sheet is adhered to both sides of the corrugated cardboard blank, and the sheet is welded together outside the periphery of the blank so that the corrugated card ⁇ board blank and the two layers of sheet form a unit which is waterproof and which can form the desired package when folded.
  • the known methods of protecting corrugated cardboard for use as a package comprise sealing the liner (i.e. its sur ⁇ face layer) of the corrugated cardboard by applying to the liner a material (e.g. plastics sheet, coating with plas ⁇ tics, rubber or wax) which makes the surface of the card ⁇ board water-repellent, or adding to the paper pulp impreg ⁇ nating agents to reduce the ability of the paper fibres to absorb moisture.
  • the known sealing or impregnation methods are performed prior to punching or cutting of the corru ⁇ gated cardboard blank. Punching or cutting of the corru ⁇ gated cardboard blank results in a punching or cutting edge which exposes the paper material and thereby makes the package vulnerable to entering moisture.
  • a method of sealing paper materials such as e.g.
  • the object of the invention is to provide a method of mak ⁇ ing a waterproof corrugated cardboard package from rela- tively inexpensive corrugated cardboard.
  • starting material may be used a non-waterproof corru ⁇ gated cardboard which just has the necessary mechanical properties, among which in particular the stack strength of finished packages should be mentioned.
  • punched holes are covered with a sheet which may be transparent, these holes serve as windows through which the contents of the package are vi- sible, without direct access thereto, e.g. for touching or contamination.
  • Claims 4-6 concern a package obtained by the method ac ⁇ cording to the invention.
  • the waterproof package thus provided is useful for trans- port and storage of fresh food such as fruit and vege ⁇ tables, fresh meat and fish as well as dairy products.
  • the package can replace a large number of known plastics trays and can be produced in cheaper paper pulps, since no great demands are made on the liner of the corrugated cardboard either because the adhered plastics sheet can be coloured in colours which are normally not used on corru ⁇ gated cardboard packages.
  • fig. 1 shows a cross-section through a rim area of a corrugated cardboard package according to the invention
  • fig. 2 shows a portion of a corrugated cardboard package prior to completion.
  • Fig. 1 shows in cross-section a portion of a punched corrugated cardboard blank with its liner 1 and fluting 2 as well as the cut edge 3 of the blank. Both sides of the liner have applied thereto a plastics sheet 4, which is welded together outside the edge of the blank with a weld 5 which thus seals the blank completely along its entire edge.
  • Fig. 2 shows a corner portion of a corrugated cardboard blank before it is folded to a finished package.
  • a slit 6 is punched in the blank, said slit having a width permit ⁇ ting formation of a weld 5 of plastics sheet 4 which is applied on both sides of the blank.
  • a punched hole 7 is covered with the plastics sheet 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)

Abstract

A plastics sheet (4) is applied on both sides of a punched corrugated cardboard blank, said sheet being welded together outside the periphery (3) of the blank to seal said blank. Punched holes in the blank covered with sheet can be folded over other areas covered by sheet and welded to it in the formation of a finished package box. Such a package is suitable for transport and storage of fresh food.

Description

A sealed corrugated cardboard package and a method of making it
The invention concerns a sealed package of a punched corrugated cardboard blank for use as a transport or storage package for fresh food as well as a method of making it. According to the invention, a waterproof plas¬ tics sheet is adhered to both sides of the corrugated cardboard blank, and the sheet is welded together outside the periphery of the blank so that the corrugated card¬ board blank and the two layers of sheet form a unit which is waterproof and which can form the desired package when folded.
Several methods are known today which aim at improving the good properties of the corrugated cardboard, that is in particular the low weight in relation to the strength, by moreover making the corrugated cardboard resistant to water and moisture.
The known methods of protecting corrugated cardboard for use as a package comprise sealing the liner (i.e. its sur¬ face layer) of the corrugated cardboard by applying to the liner a material (e.g. plastics sheet, coating with plas¬ tics, rubber or wax) which makes the surface of the card¬ board water-repellent, or adding to the paper pulp impreg¬ nating agents to reduce the ability of the paper fibres to absorb moisture. The known sealing or impregnation methods are performed prior to punching or cutting of the corru¬ gated cardboard blank. Punching or cutting of the corru¬ gated cardboard blank results in a punching or cutting edge which exposes the paper material and thereby makes the package vulnerable to entering moisture. A method of sealing paper materials, such as e.g. card¬ board, by coating with a plastics sheet on both sides of a punched blank with subsequent adhesion or welding along the rim of the blank is already known, e.g. from ring- files, covers for books, magazine holders, etc. However, this seal rarely serves to make the sealed material water¬ proof, but rather to improve the wear strength, or the purpose is of a purely cosmetic nature. The known ring- files, etc. do not use corrugated cardboard, but cardboard (compressed paper) as a core, just as this product is not used for transport or storage packages for fresh food.
The object of the invention is to provide a method of mak¬ ing a waterproof corrugated cardboard package from rela- tively inexpensive corrugated cardboard.
This object is achieved, as stated in claim 1, by applying a waterproof sheet on both sides of the punched corrugated cardboard blank and then welding the two layers of sheet outside the periphery of the blank.
As starting material may be used a non-waterproof corru¬ gated cardboard which just has the necessary mechanical properties, among which in particular the stack strength of finished packages should be mentioned.
When, as stated in claim 2, punched holes are covered with a sheet which may be transparent, these holes serve as windows through which the contents of the package are vi- sible, without direct access thereto, e.g. for touching or contamination.
When completing a package by folding a flat corrugated cardboard blank covered with sheet, the sheet over the punched holes may expediently be used for welding, as stated in claim 3. Claims 4-6 concern a package obtained by the method ac¬ cording to the invention.
The waterproof package thus provided is useful for trans- port and storage of fresh food such as fruit and vege¬ tables, fresh meat and fish as well as dairy products.
The package can replace a large number of known plastics trays and can be produced in cheaper paper pulps, since no great demands are made on the liner of the corrugated cardboard either because the adhered plastics sheet can be coloured in colours which are normally not used on corru¬ gated cardboard packages.
The invention will be explained more fully below with re¬ ference to the drawing, in which
fig. 1 shows a cross-section through a rim area of a corrugated cardboard package according to the invention, and
fig. 2 shows a portion of a corrugated cardboard package prior to completion.
Fig. 1 shows in cross-section a portion of a punched corrugated cardboard blank with its liner 1 and fluting 2 as well as the cut edge 3 of the blank. Both sides of the liner have applied thereto a plastics sheet 4, which is welded together outside the edge of the blank with a weld 5 which thus seals the blank completely along its entire edge.
Fig. 2 shows a corner portion of a corrugated cardboard blank before it is folded to a finished package. A slit 6 is punched in the blank, said slit having a width permit¬ ting formation of a weld 5 of plastics sheet 4 which is applied on both sides of the blank. A punched hole 7 is covered with the plastics sheet 4. When the shown blank portion is assembled to a right angled corner of a package box, it is folded along folding lines 8, so that the hole 7 and the superposed sheets 4 are placed over the section 7' indicated in dotted line, where the sheets 4 thus over¬ lapping are welded together and provide a stable corner.

Claims

P a t e n t C l a i m s :
1. A method of making a corrugated cardboard package, wherein a blank is punched from a corrugated cardboard sheet and a waterproof sheet (4) is applied on both sides of the corrugated cardboard, c h a r a c t e r i z e d by applying the sheet (4) to the punched corrugated cardboard blank, and welding the two layers of sheet together (5) outside the periphery (3) of the blank.
2. A method according to claim 1, c h a r a c t e r ¬ i z e by punching holes (7) in the blank, said holes being covered with the sheet (4).
3. A method according to claim 2, c h a r a c t e r ¬ i z e d by placing areas with holes (7) by folding over others of the areas (7' ) of the blank where sheets (4) thus overlapping are welded together.
4. A corrugated cardboard package made from a punched sheet blank of corrugated cardboard with a waterproof sheet (4) on both sides, c h a r a c t e r i z e d in that the sheet (4) is applied to the punched blank, and that the two layers of sheet (4) are welded together (5) outside the periphery (3) of the blank.
5. A package according to claim 4.,, c h a r a c t e r - i z e d in that punched holes (7) covered with the sheet (4) are present in the blank.
6. A package according to claim 5, c h a r a c t e r ¬ i z e d in that areas with holes (7) are folded over others of the areas (7' ) of the blank where sheets thus overlapping are welded together. A sealed corrugated cardboard package and a method of making it
ABSTRACT
A plastics sheet (4) is applied on both sides of a punched corrugated cardboard blank, said sheet being welded to¬ gether outside the periphery (3) of the blank to seal said blank.
Punched holes in the blank covered with sheet can be folded over other areas covered by sheet and welded to it in the formation of a finished package box.
Such a package is suitable for transport and storage of fresh food.
PCT/DK1990/000061 1989-03-03 1990-03-02 A sealed corrugated cardboard package and a method of making it WO1990009927A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK102989A DK102989A (en) 1989-03-03 1989-03-03 METHOD FOR SEALING PAPER PAPER FOR USE FOR SHIPPING TRANSPORT AND STORAGE PACKAGING
DK1029/89 1989-03-03

Publications (1)

Publication Number Publication Date
WO1990009927A1 true WO1990009927A1 (en) 1990-09-07

Family

ID=8100190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1990/000061 WO1990009927A1 (en) 1989-03-03 1990-03-02 A sealed corrugated cardboard package and a method of making it

Country Status (3)

Country Link
AU (1) AU5261990A (en)
DK (1) DK102989A (en)
WO (1) WO1990009927A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341345A (en) * 1998-09-09 2000-03-15 Ian Francis Wallace Backing board
GB2344786A (en) * 1998-12-15 2000-06-21 Metpac Systems Ltd Laminated packaging board
US6338234B1 (en) 1999-11-24 2002-01-15 Weyerhauser Company Method of encapsulating shipping container blanks in plastic film
WO2006007101A1 (en) * 2004-06-29 2006-01-19 Weyerhaeuser Company Cellulose based substrates encapsulated with polymeric films and adhesive
US7247216B2 (en) 2004-06-29 2007-07-24 Weyerhaeuser Co. Process for encapsulation of cellulose based substrate using non-electromagnetic heating
US7384497B2 (en) 2004-06-29 2008-06-10 Weyerhaeuser Company Process for encapsulation of cellulose based substrates using electromagnetic radiation heating
US7624911B2 (en) 2005-06-29 2009-12-01 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
US7870992B2 (en) 2005-06-29 2011-01-18 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
EP2535186A1 (en) * 2010-02-12 2012-12-19 Andrew Tak Kin Yan Packaging material, manufacturing method and packaging tool made thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902651A (en) * 1971-08-26 1975-09-02 Olinkraft Inc Waterproof corrugated box
US3929536A (en) * 1972-05-10 1975-12-30 Westvaco Corp Moisture resistant corner post
US4551123A (en) * 1983-10-28 1985-11-05 Hiromichi Inagaki Water-proof paper container and its manufacturing method
EP0216975A1 (en) * 1984-03-23 1987-04-08 Société Anonyme dite : LOCAGRAF Composite material for packaging, and packaging obtained by this material
US4722474A (en) * 1985-02-04 1988-02-02 Societe Continentale Du Carton Ondule Socar Moisture and gas-tight package that can be sealed by a film of thermoplastic material
WO1989008585A1 (en) * 1988-03-15 1989-09-21 Billy Ljungcrantz Process for manufacturing containers and containers so obtained

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902651A (en) * 1971-08-26 1975-09-02 Olinkraft Inc Waterproof corrugated box
US3929536A (en) * 1972-05-10 1975-12-30 Westvaco Corp Moisture resistant corner post
US4551123A (en) * 1983-10-28 1985-11-05 Hiromichi Inagaki Water-proof paper container and its manufacturing method
EP0216975A1 (en) * 1984-03-23 1987-04-08 Société Anonyme dite : LOCAGRAF Composite material for packaging, and packaging obtained by this material
US4722474A (en) * 1985-02-04 1988-02-02 Societe Continentale Du Carton Ondule Socar Moisture and gas-tight package that can be sealed by a film of thermoplastic material
WO1989008585A1 (en) * 1988-03-15 1989-09-21 Billy Ljungcrantz Process for manufacturing containers and containers so obtained

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341345A (en) * 1998-09-09 2000-03-15 Ian Francis Wallace Backing board
GB2344786A (en) * 1998-12-15 2000-06-21 Metpac Systems Ltd Laminated packaging board
US6338234B1 (en) 1999-11-24 2002-01-15 Weyerhauser Company Method of encapsulating shipping container blanks in plastic film
US6450398B1 (en) * 1999-11-24 2002-09-17 Herbert D. Muise Shipping container blanks encapsulated in plastic film
WO2006007101A1 (en) * 2004-06-29 2006-01-19 Weyerhaeuser Company Cellulose based substrates encapsulated with polymeric films and adhesive
US7247216B2 (en) 2004-06-29 2007-07-24 Weyerhaeuser Co. Process for encapsulation of cellulose based substrate using non-electromagnetic heating
US7384497B2 (en) 2004-06-29 2008-06-10 Weyerhaeuser Company Process for encapsulation of cellulose based substrates using electromagnetic radiation heating
US7624911B2 (en) 2005-06-29 2009-12-01 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
US7870992B2 (en) 2005-06-29 2011-01-18 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
EP2535186A1 (en) * 2010-02-12 2012-12-19 Andrew Tak Kin Yan Packaging material, manufacturing method and packaging tool made thereof
EP2535186A4 (en) * 2010-02-12 2013-10-02 Andrew Tak Kin Yan Packaging material, manufacturing method and packaging tool made thereof

Also Published As

Publication number Publication date
AU5261990A (en) 1990-09-26
DK102989A (en) 1990-09-04
DK102989D0 (en) 1989-03-03

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