EP0030442B1 - Flexibler Behälter für Schüttgut - Google Patents

Flexibler Behälter für Schüttgut Download PDF

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Publication number
EP0030442B1
EP0030442B1 EP80304322A EP80304322A EP0030442B1 EP 0030442 B1 EP0030442 B1 EP 0030442B1 EP 80304322 A EP80304322 A EP 80304322A EP 80304322 A EP80304322 A EP 80304322A EP 0030442 B1 EP0030442 B1 EP 0030442B1
Authority
EP
European Patent Office
Prior art keywords
container
loop
loops
lifting
webbing
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
EP80304322A
Other languages
English (en)
French (fr)
Other versions
EP0030442A1 (de
Inventor
Charles Sydney Futerman
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.)
MARLING EUROPE LIMITED TE LONDEN, GROOT-BRITTANNIE
Original Assignee
Miller Weblift Ltd
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 Miller Weblift Ltd filed Critical Miller Weblift Ltd
Priority to AT80304322T priority Critical patent/ATE8375T1/de
Publication of EP0030442A1 publication Critical patent/EP0030442A1/de
Application granted granted Critical
Publication of EP0030442B1 publication Critical patent/EP0030442B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • 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
    • B65D88/1687—Flexible, e.g. loops, or reinforcements therefor specially adapted for the forks of a forklift

Definitions

  • This invention relates to flexible containers for bulk material, particularly for particulate or pulverulent material, hereinafter referred to as intermediate bulk containers (IBS's).
  • IBS's intermediate bulk containers
  • intermediate bulk containers are of two main kinds.
  • the first kind is where the container has lifting means, such as straps, ropes or metal rings, attached to the top of the material forming the container; and the second kind is where the container may be lifted by means of webbing, rope or the like passing beneath the container.
  • the second kind, or 'underslung', container is still lifted from above but most of the stress is carried by the webbing or rope rather than the container material itself.
  • the most common type of lifting means comprises loops of webbing.
  • IBC A further type of IBC is illustrated in our Belgian Patent No. 862794, which comprises a bag portion for containing the material, and lifting loops comprising woven webbings of high tensile synthetic fibres at the top of the bag portion, each bag including a bight portion. The loops are stitched to reinforced- areas woven into the bag fabric itself.
  • US-A-4010784 discloses another form of IBC in which the lifting loops are attached to a folded portion of the bag fabric in order to improve the load carrying capacity of the IBC.
  • the lifting loops are of woven webbing, of polyethylene terephthalate of the type used for vehicle seat belts. Indeed where webbing lifting loops are used woven nylon or polyester seat belt webbings are almost always employed.
  • the invention seeks to provide a bulk material container the handling of which by fork-lift truck or the like is facilitated, and which can conveniently be handled by one operative alone.
  • a flexible container for bulk material intended to be handled by a fork lift truck which comprises a bag portion for containing the material and lifting loops comprising woven webbings of high tensile synthetic fibres at the top of the bag portion each including-a bight portion, characterised by the lifting loops over a substantial part of the length of each bight portion being associated with resilient means of such stiffness that the loops stand proud of the container and offer access to the lifting means without further manipulation and of sufficient resilience so that they return to the upright position after being pressed flat.
  • IBC's may be divided into two types: single trip and reusable.
  • the single trip IBC is generally of the kind referred to above in which the lifting means is attached to the top of the bag, and is relatively inexpensive to produce and may thus be treated as expendable after being used once.
  • Reusable IBC's are generally of the second kind referred to -above, i.e. underslung, and are far more expensive to produce.
  • the invention may be applied to either kind of IBC but is especially useful with single trip IBC's as the stiffened loops will only be handled a relatively few times and the possibility of the loops being flattened in use will be reduced.
  • the container may be made from any suitable strong flexible material, but is preferably made from a woven fabric.
  • the fabric is a plain weave, but naturally other weaves may be employed if desired, for example twill, basket or ribbed weave.
  • the yarns from which the bag is woven may in general be of any textile or non-textile fibre, natural or synthetic, staple or continuous filament, e.g. polyamide, polyester, acrylic, olefin, natural or regenerated cellulosic, keratinous, glass, metal or mineral.
  • continuous filaments or tapes of polyethylene or polypropylene may be used.
  • the weaving density will depend on factors such as the type and count of the yarns selected, the desired covering power and fabric weight required. However for the preferred polyethylene or polypropylene tapes, fabrics having between 10 and 25 ends per inch and between 10 and 15 picks per inch have proved suitable, using tapes with counts in the range 750 to 2000 denier.
  • the bag may be provided with a weatherproof liner.
  • the liner may be of any suitable impermeable material, e.g. treated paper or plastics material, and is preferably a plastics material, e.g. a polyethylene, sheet. In the latter case the sheet may be suitably in the range 85 to 150 micron, although it is preferred to use thicknesses towards the upper end of the range of added durability.
  • the liner may also have matching outlet spouts.
  • the supporting means may comprise straps, webbings, ropes or the like, which are sufficiently strong to support the weight of the container and its contents.
  • Particularly preferred supporting means are woven webbings of high tensile synthetic fibres, e.g. polyesters or polyamides.
  • the preferred polyethylene or polypropylene tapes of the outer bag fabric have a tensile strength in the region of 5­-6 gms per denier, and thus an inch wide strip of a 15 x 12 woven fabric of 2000 denier polypropylene will support above 150 kg in the warp direction.
  • the greater part of the stress in lifting a full container is taken by the supporting means.
  • webbing material with a breaking load of at least 1000 kg.
  • suitable webbings include, for example, 1 inch wide webbing woven from about 115 ends of 1880 decitex nylon tapes with 17-18 picks per inch having a breaking strength of about 1500 kg; or 2 inch webbing woven from 156 ends of 1990 decitex nylon tapes with 17-18 picks per inch and having a breaking strength of about 2000 kg.
  • the lifting loops according to the invention should be of such a stiffness that they stand proud of the container and offer access to, e.g. the tines of a fork-lift truck without needing manual handling of the loops.
  • the lifting loops can themselves be made of a material of suitable stiffness, but if the preferred woven webbings referred to above are employed then additional stiffening means may be employed.
  • a strip, wire or rod of material of suitable stiffness may be attached to the webbing comprising each loop, especially in the area of the bight of the loop, by any suitable means such as stitching, stapling, adhesively fixing or tying.
  • the webbing may be formed with channels or pockets therein, into which the stiffening may be placed.
  • the stiffener should preferably extend around the entire bight of the loop into the attachment points of each end of the loop to the container body, e.g. box and cross pattern stitching. So that the webbing takes the strain of lifting without affecting the stiffener, it is preferred to attach the stiffener on the upper faces of the loops, i.e. where the stiffener will not be in direct contact with the tines of the lifting means. Further, it is desirable to use a stiffener material that has an elongation characteristic at least as great as that of the loops so that stretching of the latter during lifting will not affect the stiffener.
  • the stiffener may be over-fed when attaching to the loop webbing so that there is sufficient stiffener there to accommodate the elongation of the webbing (which may be in the order of 10% for the preferred webbing referred to above when lifting loads in the range t to 2 tonnes).
  • the stiffening is in a channel or pocket in the loop it need not be sewn or adhered to the loop at all and so takes none of the strain of lifting.
  • Another alternative is to stiffen the preferred webbing, e.g. by application of a synthetic resin or prepolymer curable to a material of the required stiffness.
  • an acrylate, an acrylonitrile-butadienestyrene copolymer or another suitable polymer could be applied, e.g. from a solution or dispersion, to the webbing either batch-wise or continuously and cured or allowed to cure.
  • an acrylate emulsion may be preferred. This may be applied continuously, e.g. by means of a pad-mangle and, preferably, passed through a heating zone to effect drying and curing, to produce a webbing which is undiminished in strength but has the necessary stiffness characteristics according to the invention.
  • a hot melt thermoplastic resin could be applied to the webbing and allowed to set.
  • Figure 1 illustrates an IBC 10 having conventional webbing strap lifting loops 12, and it can be seen that the loops hang down or lie on the container body, and would need to be held up to allow a fork-lift tines to enter them.
  • FIG 2 shows an IBC 14 with a bag portion 15 having stiffened lifting loops 16 according to the invention which stand proud of the container and offer access to the tines 18 of a fork-lift truck.
  • the tines 18 can be aligned and inserted into the loops 16 by a single operator driving the fork-lift truck with no need of second operative to hold up the lifting loops.
  • the container illustrated has webbing loops 16 of woven nylon attached, by a 'box and cross' stitching pattern 20 to reinforced bands 22 of interwoven high tensile yarns as described in our aforementioned Belgian patent. Each webbing loop 16 is stiffened around the entire bight of the loop to points 24, 26 below the attachment points 20.
  • Figure 3(a) shows a webbing strap 28, suitable for use as a lifting loop 16, having a strip of stiff plastics material 30 attached thereto on the upper side by stitching 32.
  • a stiffener 28 is slipped into a pocketed webbing strap 34.
  • Figure 3(c) illustrates a plastics strip 30 being tied to the webbing 28 by means of a cord 36.
  • the number of, and positioning of, the lifting loops 16 is a matter for choice according to exact lifting means intended to be used.
  • stiffener should be sufficiently resilient to recover from flattening since, in use, it is likely that the IBC's will be stacked one on top of the other. Thus the loop in this condition should lie flat, and recover from the stacking forces to stand upright again once the weight is removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Gloves (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Packages (AREA)
  • Glass Compositions (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Claims (19)

1. Flexibler Behälter (10) für Schüttgut, der für einen Transport mit einem Gabelstapler (18) geeignet ist und einen Sack (15) zur Aufnahme des Materials und Trageschlaufen (16) am oberen Ende des Sacks aufweist, die aus gewebten Gurten (28) aus einer hochbelastbaren synthetischen Faser bestehen und eine Schleife aufweisen, dadurch gekennzeichnet, daß die Trageschlaufen (16) über einen wesentlichen Teil der Länge der Schleife mit einem federnden Element (30) mit einer derartigen Steifheit versehen sind, daß die Schlaufen (16) vom Behälter (10) abstehen und den Zugriff durch eine Hebeeinrichtung (18) ohne weitere Maßnahmen gestatten, und mit einer derartigen Federkraft daß sie in ihre aufrechte Position zurückkehren, nachdem sie flachgedrückt worden sind.
2. Behälter nach Anspruch 1, dadurch gekennzeichnet, daß der Sack (15) aus einem gewebten Tuch besteht.
3. Behälter nach Anspruch 2, dadurch gekennzeichnet, daß der Sack (15) aus Polyäthylen- oder Polypropylen-Garnen gewebt ist.
4. Behälter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sack (15) verstärkte Gebiete mit einem zusätzlich eingewebten hochfesten Garn aufweist, an denen die Trageschlaufen angebracht sind.
5. Behälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Trageschlaufen (16) aus Nylon-Gewebe bestehen.
6. Behälter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Trageschlaufen (16) durch einen Streifen, einen Draht oder einen Stab aus einem federnden Material versteift sind.
7. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß das Material (30) an die Schlaufe (16) angeheftet ist.
8. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß das Material (30) auf die Schlaufe (16) aufgebracht ist.
9. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß das Material (30) an der Schlaufe (16) angeklebt ist.
10. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß das Material (30) an die Schlaufe (16) angenäht ist.
11. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß das Material in einem Behälter oder einem Falz in der Schlaufe (16) angeordnet ist.
12. Behälter nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, daß das Material an der oberen Fläche der Schlaufe angebracht ist.
13. Behälter nach einem der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß sich das Versteifungsmaterial (30) um die gesamte Schleife der Schlaufe und bis zu den Anbringpunkten (20) der Schlaufe (16) an dem Sack (10) erstreckt.
14. Behälter nach einem der Ansprüche 7 bis 13, dadurch gekennzeichnet, daß das Versteifungsmaterial (30) ein semihartes Kunststoffmaterial ist.
15. Behälter nach Anspruch 14, dadurch gekennzeichnet, daß das Versteifungsmaterial (30) Polyäthylen, Polypropylen oder Nylon ist.
16. Behälter nach einem der Ansprüche 5 bis 15, dadurch gekennzeichnet, daß das Versteifungsmaterial (30) zumindest die gleichen Dehnungscharakteristiken wie das Material der Trageschlaufen hat.
17. Behälter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das federnde Element aus einem Harz oder einem Polymer besteht, das in die gewebte Bahn (28) imprägniert ist, um die Bahn semihart zu machen.
18. Behälter nach Anspruch 17, dadurch gekennzeichnet, daß die Bahn (28) durch Einbringen in eine Lösung oder durch eine Dispersion eines synthetischen Harzes und Abbinden des Harzes oder dadurch, daß das Harz abbinden kann, versteift ist.
19. Behälter nach Anspruch 18, dadurch gekennzeichnet, daß das Harz ein Acrylat, oder ein Acrylnitril-butadien-styren Copolymer ist.
EP80304322A 1979-12-05 1980-12-02 Flexibler Behälter für Schüttgut Expired EP0030442B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80304322T ATE8375T1 (de) 1979-12-05 1980-12-02 Flexibler behaelter fuer schuettgut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7941902 1979-12-05
GB7941902 1979-12-05

Publications (2)

Publication Number Publication Date
EP0030442A1 EP0030442A1 (de) 1981-06-17
EP0030442B1 true EP0030442B1 (de) 1984-07-11

Family

ID=10509617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80304322A Expired EP0030442B1 (de) 1979-12-05 1980-12-02 Flexibler Behälter für Schüttgut

Country Status (6)

Country Link
EP (1) EP0030442B1 (de)
AT (1) ATE8375T1 (de)
DE (1) DE3068560D1 (de)
DK (1) DK148880C (de)
GB (1) GB2063816B (de)
NO (1) NO152160C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064650A1 (en) * 2010-11-08 2012-05-18 Illinois Tool Works Inc. Flexible container assembly and methods for making and using the same

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3379902D1 (en) * 1982-10-28 1989-06-29 Ici Plc Storage bag
US4822179A (en) * 1984-07-16 1989-04-18 Bulk Lift International Incorporated Semi-bulk transport bags with lifting members of bag material
CH675108A5 (de) * 1988-05-03 1990-08-31 Huemer E Unistrap Verpackung
GB8917419D0 (en) * 1989-07-29 1989-09-13 Mulox Ibc Ltd Container bag
US5558137A (en) * 1992-09-08 1996-09-24 Mulox Ibc Limited Container bag for a closed fill system
GB9401078D0 (en) * 1994-01-20 1994-03-16 Mulox Ibc Ltd Container bag
TW252163B (en) * 1994-05-10 1995-07-21 At & T Corp Woven plastic fiber cloth having fused stiffening areas
WO1996028368A1 (en) * 1995-03-10 1996-09-19 Norsk Hydro Technology B.V. Flexible container for bulk material
GB9512467D0 (en) * 1995-06-20 1995-08-23 Poulson Brian W Forklift bag lifter & transporter attachment
AUPN910996A0 (en) * 1996-04-03 1996-05-02 Southcorp Australia Pty Ltd Lifting device for bulk type bags
GB9702574D0 (en) * 1997-02-07 1997-03-26 Rexam Mulox Ltd Container bag
GB9706017D0 (en) * 1997-03-22 1997-05-07 Rexam Mulox Ltd Container bag
ES2166650B1 (es) * 1998-11-19 2003-10-16 Murtra Ind Cinta para asas de contenedores plegables de gran capacidad.
US8721221B2 (en) 2011-02-16 2014-05-13 Premark Packaging Llc System for providing flood protection and method of implementing same
RS58223B1 (sr) 2014-02-13 2019-03-29 Starlinger & Co Gmbh Savitljivi posredni kontejner za rasute terete (fibc)
FR3041944B1 (fr) * 2015-10-05 2019-09-20 So Bag Dispositif de stockage, pour le conditionnement de matieres en vrac
CN218369631U (zh) * 2022-10-18 2023-01-24 湘潭皓康生态材料有限公司 一种简约型集装箱专用集装袋

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010784A (en) * 1973-03-04 1977-03-08 Frank Nattrass Bulk containers
US4113146A (en) * 1974-04-11 1978-09-12 Better Agricultural Goals Corporation Disposable container for bulk materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064650A1 (en) * 2010-11-08 2012-05-18 Illinois Tool Works Inc. Flexible container assembly and methods for making and using the same
US8695824B2 (en) 2010-11-08 2014-04-15 Illinois Tool Works Inc. Flexible container assembly and methods for making and using the same

Also Published As

Publication number Publication date
ATE8375T1 (de) 1984-07-15
DE3068560D1 (en) 1984-08-16
GB2063816B (en) 1983-06-02
DK510980A (da) 1981-06-06
GB2063816A (en) 1981-06-10
DK148880B (da) 1985-11-04
DK148880C (da) 1986-04-07
NO152160C (no) 1985-08-14
NO803643L (no) 1981-06-09
EP0030442A1 (de) 1981-06-17
NO152160B (no) 1985-05-06

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