EP0288079A2 - Récipient souple avec moyens de fermeture - Google Patents

Récipient souple avec moyens de fermeture Download PDF

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Publication number
EP0288079A2
EP0288079A2 EP88106510A EP88106510A EP0288079A2 EP 0288079 A2 EP0288079 A2 EP 0288079A2 EP 88106510 A EP88106510 A EP 88106510A EP 88106510 A EP88106510 A EP 88106510A EP 0288079 A2 EP0288079 A2 EP 0288079A2
Authority
EP
European Patent Office
Prior art keywords
liner
side wall
wall structure
opening
piece
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.)
Ceased
Application number
EP88106510A
Other languages
German (de)
English (en)
Other versions
EP0288079A3 (fr
Inventor
Anders Juel
Olaf Strand
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
Application filed by Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP0288079A2 publication Critical patent/EP0288079A2/fr
Publication of EP0288079A3 publication Critical patent/EP0288079A3/fr
Ceased 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
    • 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
    • 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]
    • B65D88/1675—Lifting fittings
    • B65D88/1681—Flexible, e.g. loops, or reinforcements therefor

Definitions

  • This invention relates to intermediate bulk containers used in the storage and transport of bulk materials in granular, powder or paste forms.
  • Said container comprising at least one lifting loop, a side wall structure formed from at least one piece of flexible woven fabric and a base structure and a liner of impervious material.
  • Such containers are generally manufactured from at least one piece of woven fabric, particularly woven poly- propylene or other suitable synthetic material and required to carry loads of 500 kgs or more with a considerable safety margin.
  • Typical common features are: - a side wall structure, made together from one or more panels of woven fabric stitched up to form a tube or from a piece of tubular fabric eliminating side seams. - a base construction closing the lower open end of the side wall structure.
  • lifting mean(s) at the upper end of the side wall structure capable of taking the load when the lifting mean(s) are engaged with suitable lifting mechanisms like hooks or tines of a fork lift truck.
  • the lid can be equipped with a filling spout of flexible material.
  • Liners are generally in the form of a cylindrical length of polyethylene or other impermeable plastics material. At the discharge end of the container the liner is either closed by welding and laid loosely within the side wall structure and/or closed together with discharge spout in the base construction.
  • the liner is either fully open or prewelded to form a restricted fill opening and this end of the liner may be brought through a filling opening in the outer container and may be sealed by welding, tying off etc. after the container has been filled.
  • a second problem with improved air tight liners is the bursting of the liners when stacked. It is especially the liners at the bottom of the stack which are prone to bursting and at times causing larger parts of a stack to collapse.
  • flexible containers are stacked up to 12 tiers high and all really airthight liners in the bottom tiers will burst.
  • Burst liners have a secondary adverse effect as they offer no protection against contamination when they are stored outside.
  • Singel point lift containers are especially elastic and vertical deformations of 5 - 15 cm are normal under the combined static and dynamic loads during handling . If the top of the liner is fastened to the top of such containers the liner can easily be torn apart due to these deformations. It is obviously then a better solution to leave the liner top loosely laid inside the top of the container and secure it immediately before discharge.
  • the invention according to the applicants EPO-patent application no 87100142.6 permits both entrapped air to escape when stacked and prevents the liner to block the discharge opening.
  • the manufacture of such liner, with overlapping sidewelds forming ducts to deaerate entrapped air and side skirts fastened to the side seams in the wall structure is, however, complicated and expensive.
  • the liner must be placed inside the wall structure prior to stitching the side wall seams and care must be taken to avoid those parts of the liner which are inside the side welds to get into the seams.
  • the main object of the present invention is to provide inexpensive means to deaerate entrapped air in liners used in flexible intermediate bulk containers of various designs and thereby permit stable stacking in a multitude of tiers.
  • An other object was to find means of fastening the liner to the outer container to prevent the liner from being pulled down by the product and block the discharge opening when the containers are emptied.
  • An object was also to design said fastening means in such way that no stress was transferred from the outer envelope to the liner during normal handling of the containers.
  • a further object was to develop means to prevent damage of liners when the lifting loop(s) of open top containers are engaged by suitable lifting mechanisms, e.g. the tines of fork lift truck, hooks etc.
  • the tube was joined to the wall structure with seams and the top of the liner pulled out through this tube.
  • the liner opening and the free end of the tube was then tied off with string.
  • the folds then forms ducts permitting air to escape but prevents contami­nation of the product inside the container.
  • the side seam is interrupted level with the fill height and both the protective piece of material, preferably in the form of a tube, and the string are joined to the side wall structure in connection with the side seam.
  • Fig. l shows a flat piece of flexible woven material 1 which has been folded along its transverse centerline and joined along the edges with seams 2 and 3 to form a tube with a closed upper end forming a lifting loop 4 and an open lower end which can be closed with a suitable base structure in a known way.
  • the seam 2 is stopped some distance from the top of the lifting loop to form an opening 5 for the insertion of suitable lifting mechanisms.
  • the seam 3 joining the other two edges is stopped at a larger distance from the top of the lifting loops 4, positioning the end of the seam 3 at what will later be the filling level when the container is filled, forming a larger opening 6.
  • the piece of flexible material 7 in Fig. 2a is folded along its center into a u-shape and inserted into the opening 6 at an angle with the free edges 8 resting at the top of the seam 3.
  • the piece 7 is then joined to the piece 1 with the connecting seam 9 as shown in Fig. 3.
  • This seam 9 starts at approximately the same distance from the top of the lifting loop 4 as the seam 2 and joins the edges of the piece 1 changing the opening 6 into 6 ⁇ of approximately the same size as the opening 5.
  • the seam 9 in Fig. 3 is then continued at an angle closing the upper end of the piece 7 leaving an opening 11 in the side wall structure between the seams 3 and 9 through which one can pull out the top of the liner 13.
  • Fig. 4 the top of the liner 13 is shown when folded and pressed together and the piece 7 wrapped around and tied off with the string 10 connecting both to the outside of the side wall structure.
  • the string 10 has been fastened to the side wall for example with the joining seam 3 as shown in fig. 3.
  • the top of the container in Fig. 4 has been completed with a protective sleeve 12 preforming the lifting loop 4 clearly defining the openings 5 and 6 ⁇ used when the lifting loop is engaged by suitable lifting equipment.
  • the protective piece of material 7 used to protect the liner outside the side wall structure can have several forms. It can be made from tubular fabric or stitched toghether to form a tube or parts of a tube as indicated in Fig. 2c and it may have an upper closed end. Further it may be joined to the side wall structure by other suitable means, e.g. glue, hotmelt etc.
  • FIG. 5 A preferred alternative arrangement is shown in Fig. 5.
  • a longi­tudinal slit 16 equivalent to the gap 11 between the two seams 3 and 9 in Fig. 3 is cut in the side wall structure in the vicinity of the material fill height.
  • the piece of material 7 now folded to form a "C" as shown in Fig. 2b is then joined to the side wall structure, its two edges 8 forming a longitudinal opening 15 is lined up with the slit 16, with suitable fastening means, e.g. the transverse seam 14 in Fig. 5 closing its upper open end at the same time.
  • a slit of about the same size as the slit 16 in the side wall structure must be cut in its wall and both slits lined up before the piece of material 7 is joined the side wall structure.
  • the piece of material 7 of Fig. 2c, but now folded as 7 in Fig. 2b can be pulled through the slit 16 and joined to the inside of the side wall structure.
  • the string 10 is fastened to the side wall below the slit 16.
  • the top of the liner 13 is pulled out through the slit 16 in Fig. 5 into the protective piece of material 7, then folded or pressed together and the piece 7 wrapped around and tied off with the string 10 connecting both to the outside of the side wall structure.
  • modified containers can be stably stacked in a multitude of tiers, which is an essential feature for preventing accidents. As entrapped air can escape, the liners will not burst when stacked.
  • Another advantage of the present invention is that the top of the liner is positively removed from the openings of the lifting loop(s) and are less liable to damage when these are engaged by the lifting mechanisms.
  • An essential advantage which is obtained by the present invention is that the liner is secured to the side wall structure without transferring stress from the side wall to the liner. This fastening of the liner to the outer container will simplify discharge operations eliminating the need to secure the liner before the containers are discharged and the liners will no longer block the discharge opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP88106510A 1987-04-24 1988-04-22 Récipient souple avec moyens de fermeture Ceased EP0288079A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO871706A NO161305C (no) 1987-04-24 1987-04-24 Storsekk med lukkeanordning.
NO871706 1987-04-24

Publications (2)

Publication Number Publication Date
EP0288079A2 true EP0288079A2 (fr) 1988-10-26
EP0288079A3 EP0288079A3 (fr) 1989-08-09

Family

ID=19889881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106510A Ceased EP0288079A3 (fr) 1987-04-24 1988-04-22 Récipient souple avec moyens de fermeture

Country Status (5)

Country Link
EP (1) EP0288079A3 (fr)
CN (1) CN88103207A (fr)
ES (1) ES2007478A6 (fr)
NO (1) NO161305C (fr)
PT (1) PT87325A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0535869A1 (fr) * 1991-10-03 1993-04-07 Norsk Hydro A/S Récipients flexibles
RU2256593C2 (ru) * 2003-09-23 2005-07-20 ООО "Производственная компания "ХИМПЭК" Гибкий контейнер и способ его изготовления
RU200578U1 (ru) * 2019-12-25 2020-10-29 Олег Валерьевич Середенин Вкладыш гибкого контейнера

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004003364A1 (de) * 2004-01-22 2005-08-11 Wacker-Chemie Gmbh Vorrichtung zum Transport hochdisperser Pulver und Verfahren zu ihrer Befüllung und Entleerung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450754A3 (fr) * 1979-03-06 1980-10-03 Est Imprimerie Papeterie Sac impermeable de grande contenance, a fermeture preparee et a un seul point de levage
DE3539619C1 (en) * 1985-11-08 1987-04-30 Bayer Ag Packaging for granular or small-grain products with a high degree of purity, and method for filling, transporting and emptying the packaging
GB8603966D0 (en) * 1986-02-18 1986-03-26 Agripac Dundee Ltd Industrial containers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0535869A1 (fr) * 1991-10-03 1993-04-07 Norsk Hydro A/S Récipients flexibles
EP0581393A3 (fr) * 1991-10-03 1994-02-09 Norsk Hydro A/S Récipient souple
US5350239A (en) * 1991-10-03 1994-09-27 Norsk Hydro A.S. Suspension and venting
TR26231A (tr) * 1991-10-03 1995-02-15 Norsk Hydro As Esneyebilir kaplarda ve bu kaplar ile iliskili gelismeler.
RU2256593C2 (ru) * 2003-09-23 2005-07-20 ООО "Производственная компания "ХИМПЭК" Гибкий контейнер и способ его изготовления
RU200578U1 (ru) * 2019-12-25 2020-10-29 Олег Валерьевич Середенин Вкладыш гибкого контейнера

Also Published As

Publication number Publication date
PT87325A (pt) 1989-05-12
NO161305C (no) 1989-08-02
CN88103207A (zh) 1988-12-21
NO871706L (no) 1988-10-25
ES2007478A6 (es) 1989-06-16
NO871706D0 (no) 1987-04-24
EP0288079A3 (fr) 1989-08-09
NO161305B (no) 1989-04-24

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