GB2085401A - A composite bag for vacuum packing - Google Patents

A composite bag for vacuum packing Download PDF

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Publication number
GB2085401A
GB2085401A GB8130855A GB8130855A GB2085401A GB 2085401 A GB2085401 A GB 2085401A GB 8130855 A GB8130855 A GB 8130855A GB 8130855 A GB8130855 A GB 8130855A GB 2085401 A GB2085401 A GB 2085401A
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GB
United Kingdom
Prior art keywords
bag
product
composite
air
bags
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Granted
Application number
GB8130855A
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GB2085401B (en
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Individual
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Individual
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Publication of GB2085401A publication Critical patent/GB2085401A/en
Application granted granted Critical
Publication of GB2085401B publication Critical patent/GB2085401B/en
Expired 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2023—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
    • 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
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form
    • B65D2565/387—Materials used as gas barriers
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Vacuum Packaging (AREA)
  • Wrappers (AREA)

Abstract

A composite bag for the vacuum packing of a product consists of an inner bag (1) made of a flexible plastics material and disposed within an outer bag made of aluminium foil (7) disposed between two foils (6) of polyethylene. The inner bag (1) is filled with the product to be packed and is then evacuated, and the inner and outer bags are then welded together along a seam (3). In the space between the inner and outer bags, air or an inert gas is confined, this air or inert gas acting as a cushion for protecting the packed product against damage. <IMAGE>

Description

SPECIFICATION Composite bag for use in vacuum packing a product This invention relates to a composite bag for use in vacuum packing a product.
It is known to use bags made of a plastics material for the vacuum packing of products, However, these bags allow air to diffuse therethrough thereby causing deterioration of the product. Furthermore, these bags, if made of a dielectric plastics material, permit water to diffuse therethrough by electro-osmosis. Finally, these bags, if made of a transparent plastics material, allow light to diffuse therethrough, thereby causing deterioration of the product.
To overcome these disadvantages, rigid metallic containers are often used for vacuum packing of products. These containers, after being filled with the product and then evacuated, are hermetically sealed by welding, by the use of an adhesive, or in some other way.
However, the vacuum packing of products in this way has disadvantages, First, the vacuum packing process using such containers is difficult to automate, and the number of products which can be vacuum packed by this process is limited. Furthermore, the overall weight of the product is materially increased, and the process is expensive. In addition, the thermal insulation of a product vacuum packed by this process is poor.
According to the present invention, there is provided a composite bag for vacuum packing a product, comprising an inner bag of a flexible plastics material for containing the product to be packed, disposed within an outer bag of metallic foil disposed between two foils of plastics material, the inner and outer bags having therebetween a space in which, when the composite bag is closed, air or an inert gas is confined.
For a better understanding of the invention, reference will now be made, by way of example, to the accompanying drawings, in which: Figure 1 is a perspective view of a composite bag of the invention; Figure 2 is a sectional view of the composite bag shown in Fig. 1; and Figure 3 is a perspective view of the composite bag of Fig. 1, during the filling thereof with the product to be packed.
Referring to Fig. 1, the composite bag shown has an inner bag 1 made of a flexible plastics material having a good shock resistance and a good thermal weldability, such as polyethylene. This bag 1 is disposed inside an outer plastic bag 2 made of a sandwich like material, i.e. made of a thin aluminium foil disposed between two flexible polethylene foils. The outer bag is larger than the inner bag.
When the inner bag is first put into the outer bag, it sticks to the outer bag electrostatically. When the inner bag is filled with the product to be packed, its overall size increases, but its overall size is still smaller than that of the outer bag.
The space 4 between the inner bag 1 and the outer bag 2 is filled with air or an inert gas. This air or gas is confined when the inner and outer bags are joined to each other, such as by welding or by the use of an adhesive, along seam 3, and forms a cushion protecting the product against damage by shock.
Fig. 2 is a cut-away view of the composite bag, and shows the inner bag 1 and the outer bag, the latter consisting of aluminium foil 7 disposed between two polyethylene foils 6.
Fig. 3 shows a known device for filling the composite bag of Figs. 1 and 2 (such as the device disclosed in U.K. Patent Application No. 2 040 862 ), this device including a hopper 8 provided with a flexible nozzle 5, the latter consisting of four lateral arms 1 3 linked together in an articulated manner by hinges 10 and 11. The nozzle 5 holds the composite bag open and closed under the hopper 8, which contains the product to be packed. The lateral arms are provided with holes 1 2 through which the inner bag can be evacuated by means of an air evacuating device.
A pinching device, one portion 9 of which is shown, serves for maintaining the vacuum in the inner bag until the inner and outer bags 1 and 2 are joined along seam 3 by welding or by the use of an adhesive.
This space 4 between the inner and outer bags 1 and 2 contains air or an inert gas The space is adequate to allow the maximum distortion and stretching of the inner bag 1.
Thus, the space 4 absorbs pressure exerted on the outer bag 2 thereby reducing its tendency to tear. In other words, the inert gas or air confined in the space 4 when the composite bag is closed acts as a cushion protecting the packed product. The inner bag is waterproof, and the outer bag is gas proof and opaque. Accordingly, the product is protected against the effects of air, water and light. The composite bag is cheap to make.
1. A composite bag for vacuum packing a product, comprising an inner bag of a flexible plastics material for containing the product to be packed, disposed within an outer bag of metallic foil disposed between two foils of plastics material, the inner and outer bags having therebetween a space in which, when the composite bag is closed, air or an inert gas is confined.
2. A composite bag as claimed in claim 1, wherein the outer bag is of aluminium foil disposed between two foils of polyethylene.
3. A composite bag as claimed in claim 1, substantially as hereinbefore described with
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Composite bag for use in vacuum packing a product This invention relates to a composite bag for use in vacuum packing a product. It is known to use bags made of a plastics material for the vacuum packing of products, However, these bags allow air to diffuse therethrough thereby causing deterioration of the product. Furthermore, these bags, if made of a dielectric plastics material, permit water to diffuse therethrough by electro-osmosis. Finally, these bags, if made of a transparent plastics material, allow light to diffuse therethrough, thereby causing deterioration of the product. To overcome these disadvantages, rigid metallic containers are often used for vacuum packing of products. These containers, after being filled with the product and then evacuated, are hermetically sealed by welding, by the use of an adhesive, or in some other way. However, the vacuum packing of products in this way has disadvantages, First, the vacuum packing process using such containers is difficult to automate, and the number of products which can be vacuum packed by this process is limited. Furthermore, the overall weight of the product is materially increased, and the process is expensive. In addition, the thermal insulation of a product vacuum packed by this process is poor. According to the present invention, there is provided a composite bag for vacuum packing a product, comprising an inner bag of a flexible plastics material for containing the product to be packed, disposed within an outer bag of metallic foil disposed between two foils of plastics material, the inner and outer bags having therebetween a space in which, when the composite bag is closed, air or an inert gas is confined. For a better understanding of the invention, reference will now be made, by way of example, to the accompanying drawings, in which: Figure 1 is a perspective view of a composite bag of the invention; Figure 2 is a sectional view of the composite bag shown in Fig. 1; and Figure 3 is a perspective view of the composite bag of Fig. 1, during the filling thereof with the product to be packed. Referring to Fig. 1, the composite bag shown has an inner bag 1 made of a flexible plastics material having a good shock resistance and a good thermal weldability, such as polyethylene. This bag 1 is disposed inside an outer plastic bag 2 made of a sandwich like material, i.e. made of a thin aluminium foil disposed between two flexible polethylene foils. The outer bag is larger than the inner bag. When the inner bag is first put into the outer bag, it sticks to the outer bag electrostatically. When the inner bag is filled with the product to be packed, its overall size increases, but its overall size is still smaller than that of the outer bag. The space 4 between the inner bag 1 and the outer bag 2 is filled with air or an inert gas. This air or gas is confined when the inner and outer bags are joined to each other, such as by welding or by the use of an adhesive, along seam 3, and forms a cushion protecting the product against damage by shock. Fig. 2 is a cut-away view of the composite bag, and shows the inner bag 1 and the outer bag, the latter consisting of aluminium foil 7 disposed between two polyethylene foils 6. Fig. 3 shows a known device for filling the composite bag of Figs. 1 and 2 (such as the device disclosed in U.K. Patent Application No. 2 040 862 ), this device including a hopper 8 provided with a flexible nozzle 5, the latter consisting of four lateral arms 1 3 linked together in an articulated manner by hinges 10 and 11. The nozzle 5 holds the composite bag open and closed under the hopper 8, which contains the product to be packed. The lateral arms are provided with holes 1 2 through which the inner bag can be evacuated by means of an air evacuating device. A pinching device, one portion 9 of which is shown, serves for maintaining the vacuum in the inner bag until the inner and outer bags 1 and 2 are joined along seam 3 by welding or by the use of an adhesive. This space 4 between the inner and outer bags 1 and 2 contains air or an inert gas The space is adequate to allow the maximum distortion and stretching of the inner bag 1. Thus, the space 4 absorbs pressure exerted on the outer bag 2 thereby reducing its tendency to tear. In other words, the inert gas or air confined in the space 4 when the composite bag is closed acts as a cushion protecting the packed product. The inner bag is waterproof, and the outer bag is gas proof and opaque. Accordingly, the product is protected against the effects of air, water and light. The composite bag is cheap to make. CLAIMS
1. A composite bag for vacuum packing a product, comprising an inner bag of a flexible plastics material for containing the product to be packed, disposed within an outer bag of metallic foil disposed between two foils of plastics material, the inner and outer bags having therebetween a space in which, when the composite bag is closed, air or an inert gas is confined.
2. A composite bag as claimed in claim 1, wherein the outer bag is of aluminium foil disposed between two foils of polyethylene.
3. A composite bag as claimed in claim 1, substantially as hereinbefore described with reference to, and as shown in, the accompa nying drawings.
4. A product vacuum packed in a compos ite bag as claimed in any of claims 1 to 3, the inner and outer bags of the composite bag being joined to each other and air or an inert gas being confined between the inner and outer bags of the composite bag.
5. A shock resistant and gas-proof vacuum packing bag characterised by its double wrapper; the first (internal) wrapper representing the bag for receiving the product, made of flexible plastic material that is waterproof and highly shock resistant, the second (external) wrapper, whose size is greater than the internal one, being made of a sandwich-like material composed by an aluminium foil covered on each face by a coat of opaque and gas proof polyethylene, the space between the wrappers containing air or inert gas that is confined when bag-closing and serves to absorb shocks.
6. Bag according to claim 5, wherein the way to make the bag gas proof is a double wrapper, the inner one being flexible and shock resistant and the external one being made of a sandwich-like material composed by an aluminium foil inserted between two polyethylene foils.
7. Bag according to claim 5, wherein the way to maintain vacuum on the inside of the bag is a simultaneous welding or gluing of both wrappers.
8. Bag according to claim 5, wherein the way to make the bag shock resistant is a confined volume of air or inert gas such that maximum inner wrapper distortion and stretching does not exert, if a shock happens, a pressure that could tear the external wrapper.
9. Bag according to claim 5, wherein the way to make the space between both wrappers tight is a welding or a gluing between both wrappers.
10. Bag according to claim 5, wherein the way to make the bag thermally isolating is an inert gas or air mattress that separates the inner wrapper from the external one.
11. Bag according to claim 5, wherein the way to make the bag opaque is an aluminium foil composing the metallic part of the sandwich-like material of the external wrapper.
GB8130855A 1980-10-20 1981-10-13 A composite bag for vacuum packing Expired GB2085401B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8022355A FR2492342A1 (en) 1980-10-20 1980-10-20 BAG FOR VACUUM INSULATION AND GAS IMPREGNABLE PACKAGING

Publications (2)

Publication Number Publication Date
GB2085401A true GB2085401A (en) 1982-04-28
GB2085401B GB2085401B (en) 1984-01-25

Family

ID=9247071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8130855A Expired GB2085401B (en) 1980-10-20 1981-10-13 A composite bag for vacuum packing

Country Status (4)

Country Link
JP (1) JPS57104568A (en)
DE (1) DE3141385A1 (en)
FR (1) FR2492342A1 (en)
GB (1) GB2085401B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160755A1 (en) * 1984-05-03 1985-11-13 Crescent Holding N.V. Vacuum package with smooth appearance
EP0201880A2 (en) * 1985-05-13 1986-11-20 ANTIBIOTICI CRISTALLIZZATI STERILI ACS S.p.A. Composite container for sterile, solid products
GB2200091A (en) * 1987-01-22 1988-07-27 Trigon Packaging Systems Vacuum packaging
US4835037A (en) * 1985-10-21 1989-05-30 Fres-Co System Usa, Inc. Roll of laminated web product usable for forming smooth-walled flexible packages
GB2228724A (en) * 1989-03-01 1990-09-05 Courtaulds Films & Packaging "packaging bags"
EP0734674A1 (en) * 1995-03-28 1996-10-02 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
US5706969A (en) * 1995-03-27 1998-01-13 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
WO1998031608A1 (en) 1997-01-21 1998-07-23 Food & Packaging Centre Management Limited Insulated transport container
WO2000063082A1 (en) * 1999-04-16 2000-10-26 Food & Packaging Centre Management Limited Fresh food container
CN1070450C (en) * 1995-03-29 2001-09-05 日本酸素株式会社 Adiabatic vessel and heat-insulating material and method for mfg. adiabatic vessel
WO2006007849A1 (en) * 2004-07-21 2006-01-26 Resq A/S A method of packaging safety and rescue equipment and a package for packaging safety and rescue equipment and use of the method and the package
NO20100206A1 (en) * 2010-02-10 2011-07-18 Arne Hovda Vacuum device for preservation
WO2013109187A1 (en) * 2011-10-18 2013-07-25 Menicon Singapore Pte Ltd. Contact lens secondary packaging and methods
US20170164704A1 (en) * 2002-08-17 2017-06-15 Menicon Singapore Pte Ltd Packaging for Disposable Soft Contact Lenses
US10781024B2 (en) * 2016-02-22 2020-09-22 Jx Nippon Mining & Metals Corporation Method for vacuum packing high-purity tin and vacuum-packed high purity tin

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0223375U (en) * 1988-07-29 1990-02-15
DE3917162A1 (en) * 1989-05-26 1991-04-25 Wolfgang Weinem Protective wrapping for products - consists of 1st and 2nd cling film after one centimetre apart trapping compressed tinted air between them
JPH053928U (en) * 1991-06-28 1993-01-22 豊田合成株式会社 Luminous pointer
DE4411051C2 (en) * 1994-03-30 1998-04-09 Buna Sow Leuna Olefinverb Gmbh Disposable containers for food, especially for drinking water

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734292A (en) * 1984-05-03 1988-03-29 Crescent Holding, N.V. Method of forming vacuum package with smooth appearance
EP0160755A1 (en) * 1984-05-03 1985-11-13 Crescent Holding N.V. Vacuum package with smooth appearance
EP0201880A2 (en) * 1985-05-13 1986-11-20 ANTIBIOTICI CRISTALLIZZATI STERILI ACS S.p.A. Composite container for sterile, solid products
EP0201880A3 (en) * 1985-05-13 1988-08-03 Antibiotici Cristall Steril Composite container for sterile, solid products
US4835037A (en) * 1985-10-21 1989-05-30 Fres-Co System Usa, Inc. Roll of laminated web product usable for forming smooth-walled flexible packages
AU616165B2 (en) * 1987-01-22 1991-10-24 Trigon Packaging Systems (Nz) Limited Packaging methods and packages
GB2200091A (en) * 1987-01-22 1988-07-27 Trigon Packaging Systems Vacuum packaging
GB2200091B (en) * 1987-01-22 1991-08-14 Trigon Packaging Systems Vacum packaging
GB2228724A (en) * 1989-03-01 1990-09-05 Courtaulds Films & Packaging "packaging bags"
US5706969A (en) * 1995-03-27 1998-01-13 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
EP0734674A1 (en) * 1995-03-28 1996-10-02 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
CN1070450C (en) * 1995-03-29 2001-09-05 日本酸素株式会社 Adiabatic vessel and heat-insulating material and method for mfg. adiabatic vessel
WO1998031608A1 (en) 1997-01-21 1998-07-23 Food & Packaging Centre Management Limited Insulated transport container
WO2000063082A1 (en) * 1999-04-16 2000-10-26 Food & Packaging Centre Management Limited Fresh food container
US20170164704A1 (en) * 2002-08-17 2017-06-15 Menicon Singapore Pte Ltd Packaging for Disposable Soft Contact Lenses
US10194724B2 (en) * 2002-08-17 2019-02-05 Menicon Singapore Pte Ltd Packaging for disposable soft contact lenses
US20190133275A1 (en) * 2002-08-17 2019-05-09 Menicon Singapore Pte Ltd. Packaging for Disposable Soft Contact Lenses
US10786057B2 (en) 2002-08-17 2020-09-29 Menicon Singapore Pte Ltd. Packaging for disposable soft contact lenses
WO2006007849A1 (en) * 2004-07-21 2006-01-26 Resq A/S A method of packaging safety and rescue equipment and a package for packaging safety and rescue equipment and use of the method and the package
NO20100206A1 (en) * 2010-02-10 2011-07-18 Arne Hovda Vacuum device for preservation
WO2013109187A1 (en) * 2011-10-18 2013-07-25 Menicon Singapore Pte Ltd. Contact lens secondary packaging and methods
CN103987631A (en) * 2011-10-18 2014-08-13 美你康新加坡私人有限公司 Contact lens secondary packaging and methods
TWI657021B (en) * 2011-10-18 2019-04-21 新加坡商美尼康新加坡私人有限公司 Contact lens secondary packaging and methods
CN110077729A (en) * 2011-10-18 2019-08-02 美你康新加坡私人有限公司 Contact lens secondary package and method
US10781024B2 (en) * 2016-02-22 2020-09-22 Jx Nippon Mining & Metals Corporation Method for vacuum packing high-purity tin and vacuum-packed high purity tin

Also Published As

Publication number Publication date
GB2085401B (en) 1984-01-25
JPS57104568A (en) 1982-06-29
FR2492342B3 (en) 1983-07-29
DE3141385A1 (en) 1982-12-02
FR2492342A1 (en) 1982-04-23

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