WO1991016249A1 - Conteneur intermediaire et souple pour matieres en vrac comprenant un capuchon protecteur et procede de production - Google Patents

Conteneur intermediaire et souple pour matieres en vrac comprenant un capuchon protecteur et procede de production Download PDF

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Publication number
WO1991016249A1
WO1991016249A1 PCT/NO1991/000059 NO9100059W WO9116249A1 WO 1991016249 A1 WO1991016249 A1 WO 1991016249A1 NO 9100059 W NO9100059 W NO 9100059W WO 9116249 A1 WO9116249 A1 WO 9116249A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibc
protective hood
hood
lifting loop
protective
Prior art date
Application number
PCT/NO1991/000059
Other languages
English (en)
Inventor
Roger M. Lysfjord
Original Assignee
Norsk Hydro A.S.
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 A.S. filed Critical Norsk Hydro A.S.
Publication of WO1991016249A1 publication Critical patent/WO1991016249A1/fr

Links

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

  • Flexible intermediate bulk container comprising a protective hood and method for its production.
  • the present invention relates to a flexible intermediate bulk container (FIBC) comprising a protective hood and which is suitable for outdoor storage.
  • FIBC flexible intermediate bulk container
  • the FIBC is used for transport, storage and lifting of bulk materials in granual, powder or pasta form, and possibly for liquid materials.
  • the FIBC will incorporate at least one lifting loop, a sidewall formed of at least one piece of flexible, woven material and a bottom construction and possibly also an inner bag or liner.
  • FIBC without protective hoods have been in use for a long time and they have proved to be suitable for many purposes relating to transport and storage of bulk materials.
  • the main problem with today's FIBC is, however, that during outdoor storage they have to be covered with an extra tarpaulin, either stored togheter or individually. This will complicate the use of FIBC for the end user.
  • the covering must be done to avoid moisture in the form of snow or rain, and in addition also to prevent dust and contaminations to penetrate the sack and reduce the q u a l it y o f th e bul k m a ter ial .
  • FIBC of wowen material is not waterproof.
  • the water etc. can penetrate into the bulk material through an unsealed top opening or through possible holes in the inner liner. It may also contaminate the bulk material during the emptying of the bag.
  • the bag has to be covered due to possible degradation of the wowen cloth caused by the sunlight.
  • the protective hood descirbed in the above patent may be employed in two ways. Both ways imply in that the hood is pulled down over the filled FIBC. The diameter of the hood will approximately correspond to the diameter of the bag.
  • the first method consist in that the hood is welded togheter at the top and through the lifting loop of the FIBC so that there is formed a channel through which the lifting tools can be inserted.
  • the filing opening for the bulk material will thereby be closed completely.
  • This method is very problematic in use. It also resulted in that the hook of the lifting tool destroyed the hood in the area of the lifting loop when the bag was lifted, with the consequence that it became leaky and the bulk material was contaminated.
  • the second method consists in that the upper part of the hood is made of a more narrow tubular member than the lower part of the hood.
  • the upper part is relatively long and flexible so that it automatically will attain a lower position than the filling opening itself and thereby prevent the penetration of water, dust, etc.
  • This method requires that, when engaged by a lifting tool, the upper part of the hood had to be folded backwards to obtain engagement with the lifting loop. It also apperead that this method was inconvenient and complicated in practical use. Therefore, none of the two above mentioned hood constructions had any success due to the fact that it was problematic to incorporate the hood at the top close to the lifting loop and also because it was easily stripped off the bag during outdoor storage.
  • the main object of the present invention is therefore to provide a FIBC with protective hood which is suitable for outdoor storage. Additionally the hood must be economic in production and simple in use. It is also necessary to derive a more simple and improved method for the fastening of the protective hood in the vicinity of the lifting loop to secure that it does not blow off the FIBC.
  • the hood has to be secured at the top or eventually at the top and the bottom, so that it under prevailing bad weather and wind conditions and during transport and lifting will not loosen or creep upwards along the bag. Additionally the method for securing and fastening should be suitable for automatization so that the total production cost can be reduced.
  • the basic conditions for the securing of the protective hood to the FIBC was that the fastening means should be simple and not time consuming in use, there should be a higher strength at the top of the bag for closing of the bag and it should be suitable for automisation.
  • a protective hood could not cover the lifting loop itself without being destroyed during lifting.
  • the protective hood had to be completed so near up to the lifting loop itself as practically possible and at the same time being able to effect closure to prevent penetration of contraminations.
  • the lower edge of the protective hood should be secured to the FIBC to prevent it to creep upwards along the bag when it is lifted, or to prevent it from being blown off during outdoor storage. This can be obtained by securing the edge to the FIBC using adhesives, double sided tape or by shrinkage using heat or using for example a hot air gun. After additionally testing one found however that this was not necessary provided the diameters of the hood and the bag, were adjusted to each other.
  • an appropiate protective hood will provide great savings due to the reduction of the stock of already printed bags.
  • the need for having a great stock of completed FIBC individually marked for different product types will be reduced and one has with use of a protective hood need only for one typ FIBC without printed text.
  • This will ease the delivery of bags from low cost countries where the time for delivery often is very long due to the great geographical distances. It will therefore be possible to reduce the costs related to the logistics for FIBS due to the fact the printing of text, logo etc. can be done on the protective hood fast and cheap even after an order is received.
  • One will hereby shorten the delivery time for sale of FIBC to the end user to a great extent.
  • the printed quality on a smooth poly- ethyleen surface will be superior in quality to FIBC made from woven cloth especially when printing small letters.
  • Fig. 1a, b show the protective hood with integral pleats.
  • Fig. 2a, b show the protective hood when it is treaded onto the FIBC.
  • Fig. 3 shows the protective hood and the FIBC after closure.
  • Fig. 4 shows an enlarge section of the top of the
  • Fig. 5 shows the FIBC with protective hood and a protective plate.
  • Fig. 6 shows the FIBC with the protective hood secured on each side of the lifting loop.
  • Fig. 1a illustrates a protective hood 1 for use on a FIBC 4 to prevent water, snow, dust and other contamination to penetrate into the bulk material in the FIBC.
  • the protective hood 1 is made of a flexible, soft and waterproof material f.e. plastic foil.
  • the material should additionally be UV stabilised and if desirable also UV absorbing, to protect the fiber material of the FIBC aginst detrimental exposure to sunlight.
  • the choice of materials and the thickness of the material can be varied and should be selected according to the users need and the field of use.
  • the protective hood 1 is equipped with a top part with an opening 3, a pleat insert 2 and an open bottom part 10.
  • the pleating 2 simplifies the mounting of the protective hood 1.
  • the plastic foil which the protective hood is made from will be delivered in rolls of indefinite length. This plastic foil is produced and packed with the pleats 2 as shown in fig. 1b. By production of the protective hood the plastic foil is cut in predetermined lengths. The upper part of the plastic foil is thereafter cut at an angle and welded together to a form corresponding to the lifting area 11 of the FIBC. Consequently, the opening 3 of the protective hood is thereby also contracted.
  • the design of the protective hood itself can be varied according to the design of the FIBC and it is of course within the frame of the invention to make the protective hood of tubular material without the inserts or pleats 2 and without cutting at an angle, whereby the openings at both ends will be identical.
  • Fig. 2a, b shows the protective hood 1 when it is trod onto the FIBC 4.
  • the FIBC 4 can be filed either before or after one treads the protective hood on the FIBC.
  • the protective hood can also, if desired, be trod on from the bottom of the bag, this requires that the opening 3 is larger than what is shown on fig. 2. It will, however, be most convenient if the protective hood is trod on to the bag from the upper side before the FIBC is filled. Thereby it will not be necessary to expand the protective hood in its whole circumference to tread it above the bag.
  • a hood of a flexible material of smaller diameter than the bag and by treading it over the bag before it is filled, secure that the hood after filling will tightly surround the bag.
  • a one-way valve (not shown) in the upper part of the hood will be able to assist in liberating enclosed trapped air in the upper part of the FIBC.
  • the protective hood 1 should have a larger diameter than the FIBC.
  • the length of the protective hood 1 can vary from extending down to the bottom of the FIBC till only to cover the top as a collar which only surrounds the filling opening 9.
  • the protective hood 1 can be delivered fully marked or only marked with logo, whereafter the declaration of content can be done on the filling station.
  • the marking of the waterproof plastic foil will be of a very high quality compared to the marking of the woven cloth of the FIBC.
  • Fig. 2b illustrates the FIBC 4 where the filling opening 9 is closed with an elastic and flexible band 6, for example a strapping, before the protective hood is pulled over the bag.
  • an elastic and flexible band 6, for example a strapping for example a strapping
  • Fig. 3 illustrates the FIBC 4 closed and with the protective hood 1 mounted and secured.
  • Fig. 4 shows how the strappening 6, which may be elastic, closes the filling opening at the same time as the protective hood 1 is kept in upright position.
  • the lifting loop 5 is covered by a lifting sleeve 8 which is described in EP patent No. 0118112 belonging to the Applicant.
  • the protective hood can be fastened at the lower opening 10 by using adhesives, hot melt, shrinking etc. to prevent it to creep upwards when the bag is lifted or being blown upwards during outdoor storage.
  • the lifting loop 5 is standing up as a consequence of the strapping near the top of the bag.
  • the FIBC can be stored stacked in heights from 2 to 5 bags. When the uppermost bag is removed the lifting loop 5 will flex upwards as a consequence of the above described resilient strapping.
  • the lifting loop will thereby be easier accesible for the lifting equipment of a truck or possibly a separate hook. This will simplify the "hooking" on and off to such extent that it will be unnecessary to employ separate man power for this purpose.
  • the effect will dependend somewhat on the stiffness of the fiber cloth which from the FIBC is produced. Lack of stiffness in the cloth can be compensated, however, by the use either of a stiffener in the form of a plastic rod laid into the lifting loop 5 or by employing, as shown in fig. 4, a band 7 surrounding each of the lower halfs of the lifting loop 5.
  • Fig. 5 shows a FIBC 4 with a protective hood 1 extending around part of the bottom of the FIBC 4.
  • a protective plate 12 is kept in position as shown by means of the protective hood 1 and/or glue or hot melt. Said plate 12 will protect the FIBC 4 and especially its liner from being damaged when resting on uneven surfaces. Stones, sharp particles and the like will not make cuts or holes in the liner when plate 12 is applied.
  • Plate 12 can be made from any suitable material and should preferably be porous or contain holes or channels for drainage of water.
  • Fig. 6 illustrates an embodyment of the invention comprising securing the protective hood 1 on each side of the lifting loop 5 closure of the filling opening 9 by means of the hood 1. This is accomplished by threading the hood 1 down on the FIBC 4 such that the upper cone formed part of the hood 1 is situated just below the lifting handle or sleeve 8 of the lifting loop 5.
  • Preferably two bands 7 surrounds each of the lower halves of the lifting loop 5.
  • the upper opening of the hood 1 is closed between the two halves of the loop 5, preferably by welding.
  • the hood 1 is thereby secured at its upper end to the FIBC 4.
  • complete closure of the filling opening 9 can be secured by shrinking by hot air the hood 1 to the two parts of the loop 5 by fastening, using two strappening bands 6.
  • the advantage of securing the hood 1 to the FIBC 4 in this way is that the filling opening 9 is closed by the hood 1 and thereby are conterminants prevented from entering the interior of the FIBC 4.
  • a further advantage is that the lifting loop 5 will be easier accesible for the lifting equipment, especially when both bands 7 and strappenings 6 are applied.
  • the present invention has provided a FIBC with a protective hood which is well suited for outdoor storage and which in a very simple way prevents water, snow and other contaminents to penetrate the bulk material. It is simple in use and cheap procurment. Additionally one has simplified the on- and off- engagement of the lifting equipment and made possible a reduction of the stock needed for storage of the FIBC.
  • hood of UV-stabilised or UV-absorbing material By producing the hood of UV-stabilised or UV-absorbing material one can employ relatively cheap cloth in the FIBC itself. Furthermore one will obtain great savings in logistics provided all marking and printing is being carried out on the hood, a marking which is also improved and cheaper than the marking which is carried out on the FIBC itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Outer Garments And Coats (AREA)

Abstract

L'invention se rapporte à un conteneur souple (4) à capuchon protecteur (1) ainsi qu'à son procédé de production. Il s'adresse au stockage à l'extérieur. Le capuchon protecteur (1) couvrant complètement ou partiellement la surface latérale du conteneur (4), est fixé à la partie inférieure de la boucle de levage (5) du conteneur et l'ouverture de remplissage se ferme au moyen d'éléments d'attache et de fixation (6) et/ou fermeture de l'ouverture supérieure du capuchon (1).
PCT/NO1991/000059 1990-04-23 1991-04-16 Conteneur intermediaire et souple pour matieres en vrac comprenant un capuchon protecteur et procede de production WO1991016249A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO901790 1990-04-23
NO901790A NO169706C (no) 1990-04-23 1990-04-23 Storsekk med beskyttelseshette og fremgangsmaate for dens fremstilling.

Publications (1)

Publication Number Publication Date
WO1991016249A1 true WO1991016249A1 (fr) 1991-10-31

Family

ID=19893099

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1991/000059 WO1991016249A1 (fr) 1990-04-23 1991-04-16 Conteneur intermediaire et souple pour matieres en vrac comprenant un capuchon protecteur et procede de production

Country Status (6)

Country Link
CN (1) CN1055904A (fr)
AU (1) AU7558591A (fr)
IE (1) IE911252A1 (fr)
NO (1) NO169706C (fr)
PT (1) PT97458A (fr)
WO (1) WO1991016249A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580411A1 (fr) * 1992-07-20 1994-01-26 AgriTay (Holdings) Limited Conteneurs flexibles
EP1254062A1 (fr) * 1999-12-23 2002-11-06 Amcor Packaging (New Zealand) Limited Ensemble sac
WO2017216777A1 (fr) 2016-06-17 2017-12-21 Poujaud Frédéric Dispositif de stockage sous vide et de transport de grain

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO136744B (fr) * 1973-11-13 1977-07-25 Norsk Hydro As
SE420704B (sv) * 1979-06-19 1981-10-26 Supra Ab Seckliknande behallare
GB2185732A (en) * 1986-01-23 1987-07-29 Norsk Hydro Fertilizers Limite Container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO136744B (fr) * 1973-11-13 1977-07-25 Norsk Hydro As
SE420704B (sv) * 1979-06-19 1981-10-26 Supra Ab Seckliknande behallare
GB2185732A (en) * 1986-01-23 1987-07-29 Norsk Hydro Fertilizers Limite Container

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580411A1 (fr) * 1992-07-20 1994-01-26 AgriTay (Holdings) Limited Conteneurs flexibles
EP1254062A1 (fr) * 1999-12-23 2002-11-06 Amcor Packaging (New Zealand) Limited Ensemble sac
EP1254062A4 (fr) * 1999-12-23 2004-10-20 Amcor Packaging New Zealand Lt Ensemble sac
WO2017216777A1 (fr) 2016-06-17 2017-12-21 Poujaud Frédéric Dispositif de stockage sous vide et de transport de grain

Also Published As

Publication number Publication date
NO169706C (no) 1992-07-29
AU7558591A (en) 1991-11-11
CN1055904A (zh) 1991-11-06
NO901790L (no) 1991-10-24
NO169706B (no) 1992-04-21
NO901790D0 (no) 1990-04-23
IE911252A1 (en) 1991-10-23
PT97458A (pt) 1993-08-31

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