GB2072620A - Double-layer bags - Google Patents

Double-layer bags Download PDF

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Publication number
GB2072620A
GB2072620A GB8108558A GB8108558A GB2072620A GB 2072620 A GB2072620 A GB 2072620A GB 8108558 A GB8108558 A GB 8108558A GB 8108558 A GB8108558 A GB 8108558A GB 2072620 A GB2072620 A GB 2072620A
Authority
GB
United Kingdom
Prior art keywords
bag
bags
open ends
woven
inner bag
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.)
Withdrawn
Application number
GB8108558A
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.)
SETAFIN SA
Original Assignee
SETAFIN SA
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 SETAFIN SA filed Critical SETAFIN SA
Publication of GB2072620A publication Critical patent/GB2072620A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/748—Joining plastics material to non-plastics material to natural products or their composites, not provided for in groups B29C66/742 - B29C66/746
    • B29C66/7485—Natural fibres, e.g. wool, cotton
    • 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
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple 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
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
    • B29K2311/10—Natural fibres, e.g. wool or cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • 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
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • 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
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B31B2170/202—Construction of flexible containers having multi-layered walls, e.g. laminated or lined having liners applied in already made bags, e.g. including turning the bags inside out

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

An inner bag (2) of a plastics foil is surrounded by an outer bag (1) of woven material. The edge regions (3,4) of the open ends of the inner bag and/or the outer bag are coated with a hotmelt adhesive and are firmly connected with one another by heat and pressure applied by means (5,6). <IMAGE>

Description

SPECIFICATION Method for producing bag-shaped packaging material, in particular for hygroscopic loose goods The present invention concerns a method for producing bag-shaped packaging material, in particular for hygroscopic loose goods such as fertilizers, wherein a moisture impervious inner bag made of a plastisfoil is surrounded by an outer bag made of a woven material.
It is known to introduce an inner bag made of a moisture impervious material, such as a blown polyethylene foil, into a woven bag, so as to extend to hygroscopic loose goods the advantages inherent to packaging into woven bags.
Certain disadvantages are inherent, however, in the handling of two-bag arrangements of this kind.
One essential disadvantage consists in that when loading the two-bag arrangement the inner bag may slip into the outer bag, or it may fold, or the edge of the open end of the inner bag may break and allow the loose goods penetrate between the outer bag and the inner bag. An additional disadvantage consists in that as a rule the two bags must be opened and closed independently of one another.
It is thus an object of the present invention to take measures for eliminating the afore-mentioned disadvantages.
This object is achieved by way of the method according to the invention by coating the edge regions of the open ends of said inner and outer bags with a hotmelt adhesive before joining the bags together, and subjecting said edges of the two bags to heat and pressure pressing after joining the bags together, so as to yield a firm connection therebetween.
The present invention equally concerns a two-bag arrangement comprising an inner bag made of a plastic foil and an outer bag made of a woven material, said arrangement being produced in accordance with the aforesaid method and having as invsentional characteristics that the inner bag and the outer bag are adheringly joined together at least along sections of the edges of their open ends.
The present invention further concerns apparatus for carrying out the afore-mentioned method, said apparatus being characterised in that means are provided for applying under pressure a melted adhesive between the edge regions of the open ends of an outer woven bag and an inner plastic bag.
By applying these measures it is now possible to produce a two-bag arrangement in a simple and rational manner which, when loaded closed or opened behaves like a single-walled bag and avoids all of the disadvantages of the hitherto known two-bag arrangements.
An exemplary embodiment of the invention is now explained with reference to the drawing, in which Figure 1 shows a partially exploded pictorial view of the two-bag arrangement according to the invention, and Figure 2 shows a pictorial view of a cutaway portion of the apparatus for producing the two-bag arrangement according to the invention.
The inventional two-bag arrangement shown in Figure 1 comprises an outer bag 1 and an inner bag 2.
The outer bag 1 is preferably a woven bag made of jute, or a fabric of ribbons, or a plastic fabric, or the like.
The inner bag 2 consists of a blown plastic foil or the like, preferably of polyethylene, for example.
The edge 3 of the open end of the inner bag 2, and if necessary, the corresponding edge of the outer bag 1, is at least partially coated with a hotmelt adhesive on the outside and/orthe inside, respectively. These coated surface areas are identified in Figure 2 by the reference numeral 4.
The edge regions of the open ends of the two bags 1 and 2 are then subjected in a joined-together state to a heat and pressure pressing process, so as to produce a melting of the adhesive and thus a practically inseperable connection between the bags along the edges of their open ends.
Figure 2 shows the apparatus suited for the purpose and comprising in this case two revolving heated pressure cylinder 5 and 6.
A series of changes are evidently possible within the scope of the present invention. Thus, for example, both the outer edge of the inner bag as well as or only the inner edge of the outer bag may be coated with a hotmelt adhesive. Furthermore, the apparatus intended for melting the adhesive while applying it under pressure between the edge regions of the open ends of the outer woven bag and the inner plastic bag may have a different construction and may comprise stationary heated pressure elements, for example The above clearly indicates that the described method is suited for furnishing a very reliable connection between the inner bag and the outer bag, thus providing a two-bag arrangement behaving like a single bag.
1. Method for producing bag-shaped packaging material, in particular for hygroscopic loose goods such as fertilizers, wherein a moisture impervious inner bag made of plastic foil is surrounded by an outer bag made of a woven material, characterised in that before joining the bags together the edge regions of the open ends of said inner and outer bags are coated with a hotmelt adhesive, and after joining the bags together said edges of the two bags are subjected to heat and pressured pressing, so as to yield a firm connection therebetween.
2. Two-bag arrangement comprising an inner bag made of plastic foil and an outer bag made of a woven material and produced in accordance with the method of claim 1, characterised in that the inner bag (2) and the outer bag (1) are adheringly joined together at least along sections (4) of the edges (3) of their open ends.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Method for producing bag-shaped packaging material, in particular for hygroscopic loose goods The present invention concerns a method for producing bag-shaped packaging material, in particular for hygroscopic loose goods such as fertilizers, wherein a moisture impervious inner bag made of a plastisfoil is surrounded by an outer bag made of a woven material. It is known to introduce an inner bag made of a moisture impervious material, such as a blown polyethylene foil, into a woven bag, so as to extend to hygroscopic loose goods the advantages inherent to packaging into woven bags. Certain disadvantages are inherent, however, in the handling of two-bag arrangements of this kind. One essential disadvantage consists in that when loading the two-bag arrangement the inner bag may slip into the outer bag, or it may fold, or the edge of the open end of the inner bag may break and allow the loose goods penetrate between the outer bag and the inner bag. An additional disadvantage consists in that as a rule the two bags must be opened and closed independently of one another. It is thus an object of the present invention to take measures for eliminating the afore-mentioned disadvantages. This object is achieved by way of the method according to the invention by coating the edge regions of the open ends of said inner and outer bags with a hotmelt adhesive before joining the bags together, and subjecting said edges of the two bags to heat and pressure pressing after joining the bags together, so as to yield a firm connection therebetween. The present invention equally concerns a two-bag arrangement comprising an inner bag made of a plastic foil and an outer bag made of a woven material, said arrangement being produced in accordance with the aforesaid method and having as invsentional characteristics that the inner bag and the outer bag are adheringly joined together at least along sections of the edges of their open ends. The present invention further concerns apparatus for carrying out the afore-mentioned method, said apparatus being characterised in that means are provided for applying under pressure a melted adhesive between the edge regions of the open ends of an outer woven bag and an inner plastic bag. By applying these measures it is now possible to produce a two-bag arrangement in a simple and rational manner which, when loaded closed or opened behaves like a single-walled bag and avoids all of the disadvantages of the hitherto known two-bag arrangements. An exemplary embodiment of the invention is now explained with reference to the drawing, in which Figure 1 shows a partially exploded pictorial view of the two-bag arrangement according to the invention, and Figure 2 shows a pictorial view of a cutaway portion of the apparatus for producing the two-bag arrangement according to the invention. The inventional two-bag arrangement shown in Figure 1 comprises an outer bag 1 and an inner bag 2. The outer bag 1 is preferably a woven bag made of jute, or a fabric of ribbons, or a plastic fabric, or the like. The inner bag 2 consists of a blown plastic foil or the like, preferably of polyethylene, for example. The edge 3 of the open end of the inner bag 2, and if necessary, the corresponding edge of the outer bag 1, is at least partially coated with a hotmelt adhesive on the outside and/orthe inside, respectively. These coated surface areas are identified in Figure 2 by the reference numeral 4. The edge regions of the open ends of the two bags 1 and 2 are then subjected in a joined-together state to a heat and pressure pressing process, so as to produce a melting of the adhesive and thus a practically inseperable connection between the bags along the edges of their open ends. Figure 2 shows the apparatus suited for the purpose and comprising in this case two revolving heated pressure cylinder 5 and 6. A series of changes are evidently possible within the scope of the present invention. Thus, for example, both the outer edge of the inner bag as well as or only the inner edge of the outer bag may be coated with a hotmelt adhesive. Furthermore, the apparatus intended for melting the adhesive while applying it under pressure between the edge regions of the open ends of the outer woven bag and the inner plastic bag may have a different construction and may comprise stationary heated pressure elements, for example The above clearly indicates that the described method is suited for furnishing a very reliable connection between the inner bag and the outer bag, thus providing a two-bag arrangement behaving like a single bag. CLAIMS
1. Method for producing bag-shaped packaging material, in particular for hygroscopic loose goods such as fertilizers, wherein a moisture impervious inner bag made of plastic foil is surrounded by an outer bag made of a woven material, characterised in that before joining the bags together the edge regions of the open ends of said inner and outer bags are coated with a hotmelt adhesive, and after joining the bags together said edges of the two bags are subjected to heat and pressured pressing, so as to yield a firm connection therebetween.
2. Two-bag arrangement comprising an inner bag made of plastic foil and an outer bag made of a woven material and produced in accordance with the method of claim 1, characterised in that the inner bag (2) and the outer bag (1) are adheringly joined together at least along sections (4) of the edges (3) of their open ends.
3. Apparatus for carrying out the method of claim 1, characterised in that means (5,6) are provided for applying under pressure melted adhesive between the edge regions (3) of the open ends of an outer woven bag (1) and an inner plastic bag (2).
GB8108558A 1980-04-01 1981-03-19 Double-layer bags Withdrawn GB2072620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH254580 1980-04-01

Publications (1)

Publication Number Publication Date
GB2072620A true GB2072620A (en) 1981-10-07

Family

ID=4236203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8108558A Withdrawn GB2072620A (en) 1980-04-01 1981-03-19 Double-layer bags

Country Status (6)

Country Link
JP (1) JPS56151545A (en)
BR (1) BR8101929A (en)
DE (1) DE3110289A1 (en)
FR (1) FR2479147A1 (en)
GB (1) GB2072620A (en)
IT (1) IT1136867B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218037A (en) * 1988-05-06 1989-11-08 Bingley Ltd A J Reinforcing plastics sheet; making bags
DE4124307A1 (en) * 1991-07-23 1993-01-28 Nordenia Verpackung Disposable pack of paint or other fluid - is bag with cut off end for fitting into support bucket
ES2239920A1 (en) * 2005-04-04 2005-10-01 Seinec, S.A. Bag for storing horticultural products, has laminar body comprising flexible continuous sheet bands and flexible mesh bands joined by respective opposing longitudinal edges through hot melt self-adhesive areas
CN102887271A (en) * 2012-09-14 2013-01-23 常州商隆产业用编织品有限公司 Production process for wool woven bag, and wool woven bag

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH663590A5 (en) * 1984-05-25 1987-12-31 Toni Casutt METHOD FOR PRODUCING AN EGG PACKAGE.
AT523283B1 (en) * 2020-01-23 2021-07-15 Herwig Worff Dipl Ing Method of manufacturing a sack and a sack

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1091030A (en) * 1953-10-10 1955-04-06 Improvements to waterproof bags and similar packaging articles
DE1013570B (en) * 1955-10-11 1957-08-08 Karl Dienst Dipl Ing Packaging for granular or powdery substances, especially for cereals and cereal flour, and processes for their manufacture
FR1481409A (en) * 1965-05-26 1967-05-19 Wm E Wright & Sons Co Method and device for assembling textile articles without sewing them
GB1239470A (en) * 1967-12-02 1971-07-14
US3485281A (en) * 1968-01-04 1969-12-23 Chase Bag Co Plastic lined burlap bag
US3630798A (en) * 1968-01-04 1971-12-28 Chase Bag Co Method of making plastic-lined burlap bag
GB1239471A (en) * 1968-04-08 1971-07-14
CH537796A (en) * 1972-10-23 1973-06-15 Gremaud Andre Welding pincers - for plastics

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218037A (en) * 1988-05-06 1989-11-08 Bingley Ltd A J Reinforcing plastics sheet; making bags
DE4124307A1 (en) * 1991-07-23 1993-01-28 Nordenia Verpackung Disposable pack of paint or other fluid - is bag with cut off end for fitting into support bucket
ES2239920A1 (en) * 2005-04-04 2005-10-01 Seinec, S.A. Bag for storing horticultural products, has laminar body comprising flexible continuous sheet bands and flexible mesh bands joined by respective opposing longitudinal edges through hot melt self-adhesive areas
CN102887271A (en) * 2012-09-14 2013-01-23 常州商隆产业用编织品有限公司 Production process for wool woven bag, and wool woven bag

Also Published As

Publication number Publication date
DE3110289A1 (en) 1982-03-18
FR2479147A1 (en) 1981-10-02
BR8101929A (en) 1981-10-06
IT1136867B (en) 1986-09-03
JPS56151545A (en) 1981-11-24
IT8120760A0 (en) 1981-03-27

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