EP0376622A1 - Flexible container - Google Patents

Flexible container Download PDF

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Publication number
EP0376622A1
EP0376622A1 EP89313412A EP89313412A EP0376622A1 EP 0376622 A1 EP0376622 A1 EP 0376622A1 EP 89313412 A EP89313412 A EP 89313412A EP 89313412 A EP89313412 A EP 89313412A EP 0376622 A1 EP0376622 A1 EP 0376622A1
Authority
EP
European Patent Office
Prior art keywords
container
support
flexible
fluid
fluid container
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.)
Granted
Application number
EP89313412A
Other languages
German (de)
French (fr)
Other versions
EP0376622B1 (en
Inventor
Olaf Strand
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=19891547&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0376622(A1) "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
Priority to AT89313412T priority Critical patent/ATE101575T1/en
Publication of EP0376622A1 publication Critical patent/EP0376622A1/en
Application granted granted Critical
Publication of EP0376622B1 publication Critical patent/EP0376622B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/16—Bags or like containers made of paper and having structural provision for thickness of contents of special shape
    • 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
    • B65D88/00—Large containers
    • B65D88/16—Large containers flexible
    • B65D88/1612—Flexible intermediate bulk containers [FIBC]
    • B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
    • B65D88/1625—Flexible intermediate bulk containers [FIBC] double-walled or with linings with stiffening rigid means between the walls

Definitions

  • the present invention relates to a device for a flexible container such as a flexible intermediate bulk container (FIBC) for transportation and storing of fluid material.
  • a flexible container such as a flexible intermediate bulk container (FIBC) for transportation and storing of fluid material.
  • FIBC flexible intermediate bulk container
  • fluid material as employed in this application covers liquids, suspensions and materials which at specific conditions behave as liquids, such as fluidized powder material eg Portland cement, ground magnesium powder etc.
  • liquids and fluidized materials such as Portland cement give specific problems during the filling and handling process.
  • a fluidizable material will during the filling operation start to fluidize and behave as a fluid due to mixing of air.
  • a container filled with a fluid material will be very unstable immediately after it has been filled. Therefore, it can not be disconnected from the filling apparatus and put on a conveyor belt or a pallet.
  • One object of the present invention has been to improve the qualities of the conventional flexible containers in such a way that they can be used for all types of fluid material. Another object is to provide a simple and reliable method of filling which can be carried out without use of extra equipment, the transport and storage of the filled containers being further achieved by a simple and reliable method without using specially designed transport and storage equipment. A further object has been to make the container more impervious to sharp objects thus reducing the danger of puncturing and consequent leakage.
  • a flexible container for the transportation and storage of fluid material comprises a an outer envelope and at least one inner envelope, the container having a filling opening characterised in that a support is provided between two adjacent envelopes the height of which corresponds to the fill height of fluid material in the container
  • Figure. 1 shows an example of a flexible container comprising an inner waterproof envelope 3 and an outer envelope 2. Between the inner and outer envelope is arranged a support 4 which extends around the total circumference of the container and has a height corresponding to the height of the container.
  • the support 4 comprises four rigid plates forming a rectangular shape, the rigid plates being interconnected at their side edges.
  • the rectangular shaped form can be rigid i.e. the plates can be rigidly connected.
  • the plates are connected by pin joints or hinge joints and the frame is collapsable.
  • the support collapsable gives advantages during transportation of the supports themselves or of empty containers fitted with supports. It should however, be added that as an alternative the supports can be made of separate plates and be interconnected by use of a simple joint or the half finished frames can be mounted and located in the container shortly before the flexible container is filled.
  • the supports are used in a flexible container that expands during filling, it is important that the supports can tolerate this expansion (increase of the circumference).
  • One way of allowing for the expansion is by overlapping as discussed in the following example.
  • the plates in the support should be interconnected in such a way that they do not displace with respect to each other in the vertical direction, i.e the supports should be rigid and thus resist the vertical shear forces which occur if the container is vertically unstable.
  • the supports can be made of perforated or corrugated plates, a type of frame construction, wire netting etc.
  • the support 4 is located between the outer 2 and the inner envelope 3.
  • the supports held in position due to the static pressure in the container and the friction between the supports and envelopes and thus provide a stiff and stable container.
  • the stiffness of the container is however dependent on what material and thickness the supports are made of and what material the container is made of.
  • All types of construction materials can be selected as material for the supports, such as paste board or corrugated card board, plastic material, metal or wood.
  • the factors that determine what type of material one should use will be dependent on transport environment, assumed transport load and the size of the container.
  • a container comprising an inner and an outer envelope (double walled container) is illustrated and discussed. It is however possible to arrange supports in a flexible container comprising more than two envelopes (multiple walled container). It should also be added that the word "envelope" does not only mean one layer in a double or multiple walled container, but may be a flexible container as known per se. or a flexible belt employed as a reinforcing belt for the container as described in the applicant's Norwegian Patent No. 142299.
  • the bottom of the container can be common to all envelopes, or each of the envelopes can be arranged with a separate bottom construction. Further, the supports may be arranged in the container during the manufacturing process, but before the bottom is made or the supports may be located in the container immediately before the container is filled. In the former case advantageously the container is collapsable (see Fig. 2(d)).
  • the supports can be arranged and adjusted in container with different shape and with various volumes.
  • Figures 2 (a)-(d) illustrates in a perspective view different embodiments of suitable supports.
  • Figure 2(a) illustrates a support with nearly cylindrical shape and adjusted to a cylindrical container.
  • Figure 2(b) illustrates a support with a hexagonal shape.
  • Figure 2(c) illustrates a support with narrow ribs 7 connected by pin joints side by side.
  • FIG. 2(d) illustrates a support with four sides and collapsable at the folding lines 8.
  • This type is applicable when the supports are arranged in a container during fabrication of the said container, as discussed previously.
  • the supports can be manufactured from one piece of material.
  • the material piece In forming a cylinder, Fig. 2(a), the material piece can be bent in such a way that the material ends are overlapping.
  • the overlapping technique can also be applied in the example illustrated in Fig. 2(b),(c) and (d).
  • the material pieces are supplied with folding lines or "weaknings lines" such as grooves, located at a specific distance apart which is equivalent to the width of the sides or the width of the ribs and where the sides or the ribs are made by folding at these lines.

Abstract

A flexible container (1) such as a FIBC for transportation and storage of fluid material comprising an outer envelope (2) and one or more inner envelopes (3). The container (1) can also comprise lifting loops (5) and an opening for filling (6). A support (4) is provided between two adjacent envelopes (2,3) which extends the total circumference of the container and has a height corresponding to the fill height of the container.

Description

  • The present invention relates to a device for a flexible container such as a flexible intermediate bulk container (FIBC) for transportation and storing of fluid material.
  • The term "fluid material" as employed in this application covers liquids, suspensions and materials which at specific conditions behave as liquids, such as fluidized powder material eg Portland cement, ground magnesium powder etc.
  • Today, several types of flexible collapsible containers are in use for bulk transport. Some flexible containers are designed as disposable bags whereas some are made for reuse. Examples of such flexible containers are described in Norwegian Patent Application No. 136744 and No. 138134. These describe containers which an inner waterproof liner of thermoplastic, an outer container of woven fabric etc., lifting loops and an opening for filling.
  • From a technical and economical point of view flexible containers are in many cases the best device for storing and transportation of bulk material.
  • The lack of stiffness of conventional flexible containers is however a disadvantage when it comes to filling, transport and storage of fluid material. These problems can be severe for FIBCS where the volume can be from several hundred litres up to about two thousand litres.
  • As previously mentioned, liquids and fluidized materials, such as Portland cement give specific problems during the filling and handling process. A fluidizable material will during the filling operation start to fluidize and behave as a fluid due to mixing of air. A container filled with a fluid material will be very unstable immediately after it has been filled. Therefore, it can not be disconnected from the filling apparatus and put on a conveyor belt or a pallet.
  • Various methods have been suggested for solving the problem of how to use a flexible container for fluid material. One method in use for fluidizing material is to fill the container while it is hanging on a fork truck and then transport the container directly to the storing room. However, the container has to be on the fork truck until most of the fluidizing air has escaped before it can be stored without support. This method require use of several fork trucks and an intermediate storing room for newly filled containers. This method does not allow fast filling and transport of the stable containers.
  • One method and device which gives a faster filling operation and quicker transport of the filled container is described in the European Patent Application 0064095. However even though this device allows for a quicker and more economical transport of the filled container, it still has the problem of not been stable immediately after the filling has been performed.
  • It is known to locate the container in a cylindrically shaped form before it is filled with fluidizable material. The filling process is a simple operation, but several problems arise when the cylindrical shaped form is removed. The filling process requires a large area, especially when the container is lifted out from the form. The necessary lifting operation means that special equipment is also required.
  • The problems described above have restricted the use of flexible containers and particularly of FIBCs for transportation of bulk material with large particle size, such as granular fertilizer, grain, coal etc.
  • One object of the present invention has been to improve the qualities of the conventional flexible containers in such a way that they can be used for all types of fluid material. Another object is to provide a simple and reliable method of filling which can be carried out without use of extra equipment, the transport and storage of the filled containers being further achieved by a simple and reliable method without using specially designed transport and storage equipment. A further object has been to make the container more impervious to sharp objects thus reducing the danger of puncturing and consequent leakage.
  • It has also been an object of the invention to improve the qualities without changing the basic construction of the container.
  • Further on, it has been an object of the present invention to keep the costs of the improvements as low as possible.
  • According to the invention a flexible container for the transportation and storage of fluid material comprises a an outer envelope and at least one inner envelope, the container having a filling opening characterised in that a support is provided between two adjacent envelopes the height of which corresponds to the fill height of fluid material in the container The invention will now be described in more detail, by way of example, with reference to the accompanying drawings in which:
    • Figure.1 is a schematic prospective view of a flexible container according to the invention with a part cut sectional view to illustrate the construction and
    • Figure. 2 (a) to (d) are prospective views of illustrates in a perspective view the different embodiments for the support, of the container of Figure 1.
  • Figure. 1 shows an example of a flexible container comprising an inner waterproof envelope 3 and an outer envelope 2. Between the inner and outer envelope is arranged a support 4 which extends around the total circumference of the container and has a height corresponding to the height of the container.
  • Because the container in this example comprises four flat wall panels, the support 4 comprises four rigid plates forming a rectangular shape, the rigid plates being interconnected at their side edges. The rectangular shaped form can be rigid i.e. the plates can be rigidly connected. However, suitably the plates are connected by pin joints or hinge joints and the frame is collapsable.
  • Making the support collapsable gives advantages during transportation of the supports themselves or of empty containers fitted with supports. It should however, be added that as an alternative the supports can be made of separate plates and be interconnected by use of a simple joint or the half finished frames can be mounted and located in the container shortly before the flexible container is filled.
  • Because the supports are used in a flexible container that expands during filling, it is important that the supports can tolerate this expansion (increase of the circumference). One way of allowing for the expansion is by overlapping as discussed in the following example.
    To achieve maximum stiffness of the container, the plates in the support should be interconnected in such a way that they do not displace with respect to each other in the vertical direction, i.e the supports should be rigid and thus resist the vertical shear forces which occur if the container is vertically unstable. Furthermore , it should be noted that the supports can be made of perforated or corrugated plates, a type of frame construction, wire netting etc.
  • As mentioned above, the support 4 is located between the outer 2 and the inner envelope 3. During filling of the container 1 the supports held in position due to the static pressure in the container and the friction between the supports and envelopes and thus provide a stiff and stable container. The stiffness of the container is however dependent on what material and thickness the supports are made of and what material the container is made of.
  • All types of construction materials can be selected as material for the supports, such as paste board or corrugated card board, plastic material, metal or wood. The factors that determine what type of material one should use will be dependent on transport environment, assumed transport load and the size of the container.
  • In the aforementioned example, a container comprising an inner and an outer envelope (double walled container) is illustrated and discussed. It is however possible to arrange supports in a flexible container comprising more than two envelopes (multiple walled container). It should also be added that the word "envelope" does not only mean one layer in a double or multiple walled container, but may be a flexible container as known per se. or a flexible belt employed as a reinforcing belt for the container as described in the applicant's Norwegian Patent No. 142299.
  • The bottom of the container can be common to all envelopes, or each of the envelopes can be arranged with a separate bottom construction. Further, the supports may be arranged in the container during the manufacturing process, but before the bottom is made or the supports may be located in the container immediately before the container is filled. In the former case advantageously the container is collapsable (see Fig. 2(d)).
  • The supports can be arranged and adjusted in container with different shape and with various volumes.
  • Figures 2 (a)-(d) illustrates in a perspective view different embodiments of suitable supports. Figure 2(a) illustrates a support with nearly cylindrical shape and adjusted to a cylindrical container. Figure 2(b) illustrates a support with a hexagonal shape. Figure 2(c) illustrates a support with narrow ribs 7 connected by pin joints side by side.
  • This type of support is a more flexible solution, easy to adjust for different types of containers. Fig. 2(d) illustrates a support with four sides and collapsable at the folding lines 8.
  • This type is applicable when the supports are arranged in a container during fabrication of the said container, as discussed previously.
  • The supports can be manufactured from one piece of material. In forming a cylinder, Fig. 2(a), the material piece can be bent in such a way that the material ends are overlapping. The overlapping technique can also be applied in the example illustrated in Fig. 2(b),(c) and (d). However, in these examples, the material pieces are supplied with folding lines or "weaknings lines" such as grooves, located at a specific distance apart which is equivalent to the width of the sides or the width of the ribs and where the sides or the ribs are made by folding at these lines.

Claims (9)

1. A flexible container for transportation and storage of fluid material comprising an outer envelope and at least one inner envelope, the container having a filling opening characterised in that a support (4) is provided between two adjacent envelopes (2,3), the height of which corresponds to the fill height of fluid material in the container (1).
2. A flexible container as claimed in claim 1 wherein the support (4) extends fully around the inner of the two casings (2,3) between which it is provided.
3. A flexible container as claimed inn either claim 1 or 2 wherein the support (4) is made of corrugated or flat plate sections, perforated plate sections or wire netting or comprises a frame.
4. A fluid container as claimed in any preceding claim wherein the support (4) is cylindrical and is adjusted to fit a cylindrical container.
5. A fluid container as claimed in any one of claims 1 to 3 wherein the support (4) has three or more sides and is adjusted to fit a container of the same shape.
6. A fluid container as claimed in claim 5 wherein the support (4) is formed from one section of material folded to define the sides, the edges of the material section overlapping.
7. A fluid container as claimed in claim 5 wherein each side of the support (4) is formed by a separate material section, the sections being interconnected at the inside edges by connecting means which prevent relative movement of the sections in the vertical direction, but allow some movement in the horizontal direction to compensate for the radial expansion of the container.
8. A fluid container as claimed in claim 7 wherein the connecting means is a flexible or pin joint whereby the support (4) is collapsable.
9. A fluid container as claimed in any one of the claims 1 to 5 wherein the support (4) comprises a plurality of vertically aligned narrow ribs (7) the ribs being interconnected at their side edges by a flexible connection or pin joint which allows rotation about the vertical axis and relative movement in the horizontal plane, but prevents relative movement in the vertical direction.
EP89313412A 1988-12-21 1989-12-21 Flexible container Expired - Lifetime EP0376622B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89313412T ATE101575T1 (en) 1988-12-21 1989-12-21 FLEXIBLE CONTAINER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO885698 1988-12-21
NO885698A NO165718C (en) 1988-12-21 1988-12-21 Device by a flexible container

Publications (2)

Publication Number Publication Date
EP0376622A1 true EP0376622A1 (en) 1990-07-04
EP0376622B1 EP0376622B1 (en) 1994-02-16

Family

ID=19891547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89313412A Expired - Lifetime EP0376622B1 (en) 1988-12-21 1989-12-21 Flexible container

Country Status (12)

Country Link
EP (1) EP0376622B1 (en)
KR (2) KR900009400A (en)
CN (1) CN1018911B (en)
AT (1) ATE101575T1 (en)
AU (1) AU631163B2 (en)
CA (1) CA2005868A1 (en)
DE (1) DE68913176T2 (en)
ES (1) ES2049337T3 (en)
MY (1) MY104703A (en)
NO (1) NO165718C (en)
RU (1) RU1838204C (en)
TR (1) TR27710A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003002A1 (en) * 1995-07-07 1997-01-30 Upm-Kymmene Oy Container meant for bulk goods
WO2000029310A1 (en) * 1998-11-16 2000-05-25 Storsack Tradco Limited Flexible collapsible container
WO2012040372A1 (en) * 2010-09-22 2012-03-29 Illinois Tool Works Inc. Container assembly and methods for making and using same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI945273A (en) * 1994-11-09 1996-05-10 Rosenlew Ab Oy W Småförpackning
CN100343129C (en) * 2003-02-13 2007-10-17 泰立有限公司 Bulk bag.
CH701338A1 (en) * 2009-06-22 2010-12-31 Codefine Sa Protection device for discharge valve fitted to bags for the transport and handling liquid or quasi liquid substances.
US8365912B2 (en) 2010-10-21 2013-02-05 Lincoln Global, Inc. Wire containment structure including container and bag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2437670A1 (en) * 1974-08-05 1976-02-19 Geb Euteneuer Gertrud Orth Folding watertight container for flowers - has cardboard walls protected by bag from damp
US4064302A (en) * 1973-02-28 1977-12-20 Kozlowski Edward C Composite flexible, semi-rigid materials and process for making same
EP0083505A1 (en) * 1981-12-31 1983-07-13 Super Sack Manufacturing Corporation Collapsible receptacle with prefabricated lift loops and method of making same
GB2173169A (en) * 1985-04-06 1986-10-08 Sengewald Karl H Packaging constructed as carrier bag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064302A (en) * 1973-02-28 1977-12-20 Kozlowski Edward C Composite flexible, semi-rigid materials and process for making same
DE2437670A1 (en) * 1974-08-05 1976-02-19 Geb Euteneuer Gertrud Orth Folding watertight container for flowers - has cardboard walls protected by bag from damp
EP0083505A1 (en) * 1981-12-31 1983-07-13 Super Sack Manufacturing Corporation Collapsible receptacle with prefabricated lift loops and method of making same
GB2173169A (en) * 1985-04-06 1986-10-08 Sengewald Karl H Packaging constructed as carrier bag

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003002A1 (en) * 1995-07-07 1997-01-30 Upm-Kymmene Oy Container meant for bulk goods
US5806706A (en) * 1995-07-07 1998-09-15 Upm-Kymmene Oy Container meant for bulk goods
CN1071261C (en) * 1995-07-07 2001-09-19 乌鹏-屈曼尼有限公司 Container meant for bulk goods
WO2000029310A1 (en) * 1998-11-16 2000-05-25 Storsack Tradco Limited Flexible collapsible container
WO2012040372A1 (en) * 2010-09-22 2012-03-29 Illinois Tool Works Inc. Container assembly and methods for making and using same
US9061815B2 (en) 2010-09-22 2015-06-23 Signode Industrial Group Llc Container assembly and methods for making and using same

Also Published As

Publication number Publication date
RU1838204C (en) 1993-08-30
KR900009398A (en) 1990-07-04
AU631163B2 (en) 1992-11-19
NO165718B (en) 1990-12-17
ATE101575T1 (en) 1994-03-15
CN1043677A (en) 1990-07-11
EP0376622B1 (en) 1994-02-16
NO885698L (en) 1990-06-22
NO885698D0 (en) 1988-12-21
NO165718C (en) 1997-10-23
TR27710A (en) 1995-06-22
CA2005868A1 (en) 1990-06-21
DE68913176T2 (en) 1994-07-14
DE68913176D1 (en) 1994-03-24
CN1018911B (en) 1992-11-04
MY104703A (en) 1994-05-31
ES2049337T3 (en) 1994-04-16
KR900009400A (en) 1990-07-04
AU4715289A (en) 1990-06-28

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