CA1221923A - Flexible container in folded position - Google Patents

Flexible container in folded position

Info

Publication number
CA1221923A
CA1221923A CA000467310A CA467310A CA1221923A CA 1221923 A CA1221923 A CA 1221923A CA 000467310 A CA000467310 A CA 000467310A CA 467310 A CA467310 A CA 467310A CA 1221923 A CA1221923 A CA 1221923A
Authority
CA
Canada
Prior art keywords
liner
outer container
container
gussets
folded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000467310A
Other languages
French (fr)
Inventor
Eirik Myklebust
Bjarne Omdal
Anders Juel
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19887343&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA1221923(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Norsk Hydro ASA filed Critical Norsk Hydro ASA
Application granted granted Critical
Publication of CA1221923A publication Critical patent/CA1221923A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D88/00Large containers
    • B65D88/16Large containers flexible
    • B65D88/22Large containers flexible specially adapted for transport
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D88/00Large containers
    • B65D88/16Large containers flexible
    • B65D88/1612Flexible intermediate bulk containers [FIBC]
    • B65D88/1618Flexible intermediate bulk containers [FIBC] double-walled or with linings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Packages (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Cartons (AREA)
  • Bag Frames (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Revetment (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Tubes (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Table Devices Or Equipment (AREA)
  • Processing Of Solid Wastes (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

Abstract The present invention relates to a flattened flexible con-tainer made ready for filling with bulk material, and method and means for making a container comprising a liner of im-pervious sheet in an outer container of strong load-bearing material. The liner and the outer container are folded longi-tudinally in the same way such that the liner is kept in position by having its folds or gussets everywhere placed in the corresponding folds or gussets of the outer container.
Both the liner and the outer container may have a longi-tudinal gusset on each side which can have a width of up to 1/8 of the container's circumference. The manufacture can be carried out in an apparatus (8) in form of a box which is open in both ends and can be folded together. Its side walls consist of longitudinal parts (7) which are connected to each other and the roof (4) and bottom (5) of the apparatus (8) by means of pliable connecting means (6). The container accord-ing to the invention can be filled with bulk material without prior inflation at the filling site.

Description

The present inven~ion relates to a fla~tened flexible con-tainer or intermediate bulk container made ready for being filled with bulk material, and it comprises an outer con-tainer of strong load-carrying material and an inner liner of impervious sheet material, e.g. of thermoplastic or paper.

The invention also comprises a method for manufacturing such containers and means for manufacturing the container.

For most applications of flexible containers it is necessary that the material to be transported is protected against being contaminated by dust, water etc., and this is usually obtained by application of an impervious liner which ideally shall be positioned against the outer container when it is filled with a material which shall be transported and/or stored. It has been found practical to place the liner in the load-carrying container already at the production site of the container. However, it has proved to be difficult to place the liner in such a way that it will not be damaged or crumpled and get a form which deviates from that of the outer container, and thereby easily bursts when it is filled with bulk material.

One way of making the above mentioned containers has been to fasten the liner to the base material for the outer container with glue or tape and thereafter finish sewing the outer con-tainer. This is labour-consuming and requires great precision in order to avoid damage of the liner during said sewing operation. Further the tapes, and thereby the liner, can be L~

incorrectly positioned such that it will be unevenly loaded during filling and may then burst easily.

The final centration of the liner in the outer container can take place by its inflation at the filling station, for in-stance as described in GB Pat~nt No. 1.475.019 (corresponding to Norwegian Patent No. 136.74~). The liner will then be pressed against the outer container and be in close formation with it, presupposing that the liner originally is cor~ectly placed and fastened to the outer container. Accordingly, this method presupposes great accuracy during placement of the liner in the outer container~

In DE No. 2.721.771 it is described a container consisting of an outer load-carrying container of roundwoven material and a liner of thermoplastic sheet. According to this application the sheet is centrally placed and possibly folded during manufacture of the roundwoven base material for the load-carrying container. ~utting of suitable pieces of sheet and web, and closure of one end of the inner and outer container must then be carried out in successive steps. By this method the liner is folded by simple gusset and placed in the middle of the container, which is folded by double gusset. Thereby the folded liner will be placed between the central side fold in the double-folded outer container such that the liner is kept in place in the middle of the outer container during its further manufacture. Even though this method secures center-ing of the liner in the outer container, the method is limited to manufacture of outer containers made from round-woven material. Further one will in certain cases get pro-blems by the final placement of the liner in connection with securing close placement against the outer container, at least that part of it which shall be filled with bulk material.

The object of the present invention was to arrive at a flexible container which when inflated or filled will have a liner with the same form as the outer container and where the liner everywhere lies closely against corresponding points of the outer container, at least that part of the container which shall be filled with bulk material, without using fastening means as tape etc., and that crumpling of the container is avoided.

A further object was to arrive at an apparatus and a rational way for correct placement of the liner in the outer container at the production site and thereby be able to manufacture a product which is completed as far as possible there~

The most important problems experienced with flexible con-tainers, proved to be caused by incorrect placement and fastening of the liner at the production site. The inventors therefore tried to change the method of placing the liner in the outer container and a way of fastening the liner or keep-ing it in place in the outer container. Obviously, it is no help in placing the liner correctly at the beginning if it is dis~laced before or during the filling operation. In order to avoid penetration and fastening by securing the liner to the outer container if it is displaced or incorrectly placed, the container can of course be readymade before the liner is placed in it. The problem will then be to place the liner correctly in the outer container in a rational way and such that it is not crumpled during filling of bulk material and thereby can be damaged.

To start with the inventors chose to direct their effort on placing the liner in the outer container after the latter had been joined together. It was found that placement of the liner could be carried out in a simple way and that it also could be locked in a centered position in the outer container without using glue or tape. The operation of placing and fastening the liner would thereby be simpler than by pre-viously used methods. In addition one obtained a product con-sisting of a load-carrying outer container and a protecting liner of impervious material which was simpler, faster and more secure to fill with bulk material than previously known containers where the liner was fastened to the outer con-tainer by tape or the like. It was found that if the liner was placed in an outer container and folded lengthwise with the same type of gusset as the outer container, the liner would be kept in place by the gusset or fold of the outer container. Further would those points of the liner which are opposite and against corresponding points in the outer con-tainer when it was inflated or filled also be opposite each other when the two containers were folded together. By this way of manufacturing the container one obtained all the above advantages.

Manufacture of such a product can be carried out in several ways and will to a certain degree depend on whether the outer container is made from flatwoven or roundwoven base material.
Primarily the liner and the outer container are folded with gusset lengthwise in the same way such that the liner's gusset is kept in place by the outer container's gusset when the containers are flattened and that corresponding points lie against each other such as stated above.

The inventors found a suitable way of obtaining the new pro-duct by placing the liner in the finished outer container which then was inflated. This was carried out in a special way, i.e. by first placing the container in some folding means in form of a tunnel or box having squarish cross-section and then inflated. The longitudinal side walls were divided in two and joined together by hinges or the like.
Subsequent to inflation the box was pressed together, and during this operation the hinged side walls formed gussets in both the liner and the outer container. The containers were pressed together and could then be drawn out of the box, and optionally they could be fslded crosswise of the longitudinal direction and were then ready for transport to the filling site for bulk material.

A flexible container according to the invention can be con-nected to a filling apparatus and bulk material can be filled directly into it without prior inflation. For some types of bulk material inflation of the container at the filling site can be practical for other reasons than adjustment of the liner to the outer container. Containers according to the invention can also be obtained in several other ways than the above one, and some of these will be described in the follow-ing text.

The invention is as defined in the following claims.

The invention will be further explained in connection with the description of the figures and an example.
igure 1 shows a cross-section of the folding apparatus with the container in inflated form.
igure 2 shows the folding apparatus with the inflated container viewed from the side.
igure 3 shows a cross-section o~ the liner and outer container partly folded together in a folding apparatus.
igure ~ shows a cross-section of the folding apparatus with the container completely pressed together.

In figure 1 is shown a folding apparatus (8) in form of a squarish box or tunnel being open in both ends. The cross-section of the apparatus (8) can of course deviate from the squarish form. lt can for instance be rectangular or its wall~ (7), roof (4) and bottom (5) can be slightly curved.

The apparatus (8) can be folded together as its side walls consist of at least two longitudinal parts (7) which are connected to each other and the roof (4) and the bottom (5) by means of pliable ~oining means (6) which ~an be hinges, flexible tapes or the like.

A product according to the invention can be made by first placing a liner (2) in a completed outer container (1) which can he equipped with lifting grip (3). Both the liner and the container are then placed in the apparatus (8) and air is blown into the liner (2) and pressing it against the outer container (1) such that it touches the walls (7), roof (4) and bottom (5) of the apparatus (8). In order to show that one has two containers, the liner or inner container (2) is shown on the ~igure at a certain distance from the outer container (1), while in practice the two containers will lie closely against each other when they are inflated.

In figure 2 there is a side view of the apparatus (8), and one will notice parts of the containers outside the apparatus (8) such that one can get hold of the lifting grip (3).

In figure 3 the apparatus (8) is partly pressed together as the roof (4) is pressed against the bottom (5), and the join-ing means (6) of the side walls (7) are pressed against the centre of the apparatus (8). During this pressing operation both containers (1 and 2) are exposed to a certain air pressure at the same time as air can get out corresponding to lowering the roof (4) against the bottom (5). Hereby one ob-tains that both containers are folded in the same way and that the liner (2) all the time and all over is pressed against the outer container (1).

~2~

In figure 4 the apparatus (8) is shown after having been pressed completely together, and both containers are folded in the same way. In order to clearly visualize how the con-tainers are folded~ the roof (4) and the bottom (5) of the apparatus (8) are drawn in an artificially large distance from each other. The folds of the liner (2) lie in the cor-responding folds of the outer container (1). As can be seen from figures 3 and 4 the width of the gussets will be about 1/4 of the flat laid width of the container, i.e. about 1/8 of the container's circumferenceO By applying such deep gussets one obtains both that the liner is kept securely in place in correct position in the outer container and that corresponding points in the two containers lie across each other such as they shall when the containers are inflated or filled with bulk material. The containers can now be drawn out of the apparatus (8) in folded form by using the lifting grip (3). The containers can then be folded together one or several times and will then be ready for transport to the filling site for bulk material.

The product according to the invention can also be made in other ways than the one described aboveO The essential feature of the manufacture is that the liner is placed in the outer container and that the folding is carried out such that both containers are folded in the same way such that the liner everywhere lies against the outer container. This can for instance be obtained by inflating the containers or pressing them out crosswise before both containers are folded. One can for instance first place the liner in on the outer side of a rack or the like having the same form as the cross-section of the apparatus (8) shown in figure 3. There-upon the outer container can be placed over the liner and the apparatus pressed together till one gets a folded two-gusset flexible container. In order to use this method the con-tainers must be open in one end. Duriny manufacture from material for double-gusset flexible containers, one will L~3~3 principally carry out the method in a similar way by round-weaving the outer container around the continuous hose of the liner and then place the two base materials in on a folding apparatus such that the base material for the liner and the outer container are folded len~thwise in the same way and that the base material for the liner is kept in place as its folds or gussets lie in the corresponding folds or gussets in the outer container's base material. Base materials manufac-tured in this way can then be cut up in suitable pieces and joined together in at least one of their open ends by forming bottom and lifting loops.

The present invention has given a product into which bulk material can be filled without prior inflation at the filling site and without damaging the liner. This leads then to less rejection of containers and totally faster filling of the containers. One also avoids that the liner forms pockets which can not be utilized. Already from the moment the liner and the outer container are folded and until they are filled with bulk material they will be in such relative position which they shall have when filled.

The inventors also arrived at a method for manufacturing the product, an apparatus which both by itself is rational and which in addition simplified the whole process from manufac-ture of the flexible container till it i5 filled with bulk material and is ready for further transport to storage or application.

Claims (3)

Claims
1. Flattened container ready for filling with bulk material, comprising a liner of impervious sheet in an outer container of strong load-carrying material, c h a r a c t e r i z e d i n t h a t the liner and the outer container are folded length-wise in the same way such that the liner is kept in position by having its folds or gussets everywhere placed in the corresponding folds or gussets of the outer container, and that both the liner and the outer container have a longitudinal gusset on each side, which gussets have a width of up to 1/8 of the container's circumference.
2. Method for manufacture of flattended flexible con-tainers according to claim 1, c h a r a c t e r i z e d i n t h a t the liner or continuous material for this is placed in an outer container or continuous material for this and inflated or stretched out cross-sectionally, whereby both the liner and the outer container or their base material are folded for making longitudinal gussets and that the liner's gusset everywhere is placed in the outer container's gussets.
3. Method according to claim 2, c h a r a c t e r i z e d i n t h a t both the liner and the outer container are positioned in a collapsible box or tunnel and where the side walls are divided in the middle and hinged together, and that the liner and the container then are inflated, whereupon the box is pressed together and the centre line of the box and the thereby formed container is pulled out of the box.
CA000467310A 1983-11-09 1984-11-08 Flexible container in folded position Expired CA1221923A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO834082A NO153250C (en) 1983-11-09 1983-11-09 LARGE BAG, INCLUDING AN OUTER CONTAINER AND A CONTINUOUS CONTAINER, AND PROCEDURE AND DEVICE FOR ITS MANUFACTURING
NO834082 1983-11-09

Publications (1)

Publication Number Publication Date
CA1221923A true CA1221923A (en) 1987-05-19

Family

ID=19887343

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000467310A Expired CA1221923A (en) 1983-11-09 1984-11-08 Flexible container in folded position

Country Status (23)

Country Link
EP (1) EP0141429B1 (en)
JP (1) JPS60123383A (en)
KR (1) KR900008904B1 (en)
AT (1) ATE49566T1 (en)
AU (1) AU571903B2 (en)
BR (1) BR8405699A (en)
CA (1) CA1221923A (en)
DE (1) DE3481050D1 (en)
DK (1) DK153873C (en)
ES (2) ES8603774A1 (en)
FI (1) FI76761C (en)
GR (1) GR80866B (en)
HU (1) HU192497B (en)
IE (1) IE55762B1 (en)
IN (1) IN161708B (en)
MA (1) MA20261A1 (en)
NO (1) NO153250C (en)
PL (1) PL144288B1 (en)
PT (1) PT79430B (en)
RO (1) RO90879B (en)
SU (1) SU1604150A3 (en)
TR (1) TR23173A (en)
ZA (1) ZA848306B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1302312C (en) * 1985-10-25 1992-06-02 Dietmar J. Neumann Flexible container
AU587094B2 (en) * 1985-12-11 1989-08-03 Visy R & D Pty Ltd Reinforced containers
NL8601365A (en) * 1986-05-28 1987-12-16 Boots Gerardus A M PACKAGING FOR DUMPED GOODS, POWDERS, PELLETS AND THE LIKE.
NL8700063A (en) * 1987-01-13 1988-08-01 Boots Gerardus A M PACKAGING FOR BULK, FLUIDA AND SIMILAR MATERIALS.
JP2563182Y2 (en) * 1991-04-05 1998-02-18 カルソニック株式会社 Heat exchanger
GB9121002D0 (en) 1991-10-03 1991-11-13 Norsk Hydro As Improvements in and relating to flexible containers
DE4341977C2 (en) * 1993-12-09 1996-03-28 Arnold Prof Dip Wietrzichowski Component made of folded flat material and application
WO1997013694A1 (en) * 1995-10-10 1997-04-17 John Duncan Mcneill Container means with foldable wall means
RU2621957C2 (en) * 2015-09-22 2017-06-08 Данил Александрович Люкшин Tank container
NL2022701B1 (en) 2019-03-08 2020-09-22 Van Riemsdijk Rotterdam B V A collapsible freight container

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1177467A (en) * 1957-06-22 1959-04-24 Manufacturing process of flexible volumes and resulting products
FR1177476A (en) * 1957-06-24 1959-04-24 Pillard Chauffage Full or partial atomizing liquid fuel burner using pressurized auxiliary fluid
FR2509266A1 (en) * 1981-07-09 1983-01-14 Lumbres Papeteries Cartonnerie Box profile plastic sacks with oversized internal linings - to ensure full fitting and load distribution
NZ205363A (en) * 1982-09-30 1987-04-30 Custom Packaging Syst Large collapsible bag with rectangular spout
JPS59106388U (en) * 1982-12-28 1984-07-17 池川 恒美 Container for powder and granular materials

Also Published As

Publication number Publication date
DK531584D0 (en) 1984-11-08
PL144288B1 (en) 1988-05-31
GR80866B (en) 1985-03-08
FI76761C (en) 1993-05-13
PT79430A (en) 1984-11-01
EP0141429A2 (en) 1985-05-15
DK153873C (en) 1989-01-23
FI76761B (en) 1988-08-31
MA20261A1 (en) 1985-07-01
ES537377A0 (en) 1986-01-01
BR8405699A (en) 1985-09-10
DK531584A (en) 1985-05-10
NO834082L (en) 1985-05-10
IN161708B (en) 1988-01-16
FI844396L (en) 1985-05-10
EP0141429A3 (en) 1986-12-17
ATE49566T1 (en) 1990-02-15
HUT39394A (en) 1986-09-29
EP0141429B1 (en) 1990-01-17
ES286213U (en) 1985-12-01
AU571903B2 (en) 1988-04-28
NO153250C (en) 1986-02-12
RO90879A (en) 1987-01-30
AU3495284A (en) 1985-05-16
JPH0220510B2 (en) 1990-05-09
ES286213Y (en) 1986-06-16
RO90879B (en) 1987-01-31
NO153250B (en) 1985-11-04
DK153873B (en) 1988-09-19
HU192497B (en) 1987-06-29
SU1604150A3 (en) 1990-10-30
IE842709L (en) 1985-05-09
DE3481050D1 (en) 1990-02-22
ES8603774A1 (en) 1986-01-01
KR850004237A (en) 1985-07-11
KR900008904B1 (en) 1990-12-11
TR23173A (en) 1989-06-02
PT79430B (en) 1986-08-05
ZA848306B (en) 1985-06-26
JPS60123383A (en) 1985-07-02
FI844396A0 (en) 1984-11-08
PL250368A1 (en) 1985-07-16
IE55762B1 (en) 1991-01-02

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