EP0300539A1 - Doppelwandiger Grosssack - Google Patents

Doppelwandiger Grosssack Download PDF

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Publication number
EP0300539A1
EP0300539A1 EP88201408A EP88201408A EP0300539A1 EP 0300539 A1 EP0300539 A1 EP 0300539A1 EP 88201408 A EP88201408 A EP 88201408A EP 88201408 A EP88201408 A EP 88201408A EP 0300539 A1 EP0300539 A1 EP 0300539A1
Authority
EP
European Patent Office
Prior art keywords
bag
tabs
double
plies
inner bag
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.)
Withdrawn
Application number
EP88201408A
Other languages
English (en)
French (fr)
Inventor
Otto Schooneveld
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.)
Cacao De Zaan BV
Original Assignee
Cacao De Zaan BV
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 Cacao De Zaan BV filed Critical Cacao De Zaan BV
Publication of EP0300539A1 publication Critical patent/EP0300539A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a double-walled bag of high loading capac­ity for fine-powdered or fluid material, comprising an outer bag of flexible and yet hardly elastic material having a rectangular bot­tom, and an inner bag of relatively elastic and fluid-proof ma­terial also having a rectangular bottom, which double-walled bag is destined to be filled from above and to be emptied through an open­able discharge spout, said outer and inner bags being mutually con­nected by at least one tab which is connected in a fluid-proof manner to the inner bag.
  • Such a double-walled bag is known from EP-A-0168974.
  • the tabs of the known completely rectangular or cylindrical bags prevent the inner bag from falling out when emptying it, and thus blocking the discharge spout.
  • the spouts of the known bags consist of tubes which have to be ad­hered to a hole in the bottom or top of the inner bag, which bottom and top in their turn have to be adhered to the inner bag itself. In view of the great dimensions of the bags this is a very diffi­cult procedure, which can easily result in bags which do not sa­tisfy the high demands as to being fluid-proof.
  • the invention aims to improve the above. According to the inven­tion, this has been attained in that the inner bag has been ex­truded in tubular form, then folded into four plies and laid down in such a way that the upper and lower broad plies are delimited by outer folds, whereas the smaller inner plies are delimited by the outer folds and two inner folds which substantially extend in the longitudinal axis of the tube, and in that each of the at least four pairs of outer and inner plies have been heat-welded and cut along a first line parallel to the longitudinal axis of the tube for forming the discharge spout and a second line at an angle of substantially 45° in relation to the first line, which second lines extend between the discharge spout and the corners of the bottom of the outer bag when the double-walled bag has been filled.
  • the inner and outer bags can merge into a more or less tubular form. In this case there are four pairs of plies, which have been heat-­welded. If the invented bag is embodied with a closed top, there are eight such pairs, of course.
  • tabs are adhered or sealed to the inner bag, which strips are at least fastened by a stitch to the outer bag near its upper edge.
  • the strips preferably extend peripherally.
  • a rope can be connected to the tabs, which ropes can extend through holes of the outer bag to be knotted therein.
  • the tabs which ropes can extend through holes of the outer bag to be knotted therein.
  • the inner bag and/or said tabs consist of polypropylene or poly­ethylene, preferably polyethylene film, from PE-coated paper or from another fluid-proof material and preferably consist of poly­ethylene strip-woven fabric.
  • the double-walled bag represented in figs. 1 and 2 consists of an outer bag 1 of woven polypropylene with a specific density ranging from ⁇ 180 to 400 g/m2 or of polyethylene strip-woven fabric (stretched polyethylene), and an inner bag 2 of polyethylene film with a thickness ranging from ⁇ 80 to 150 ⁇ m.
  • the inner bag 2 comprises four side walls 3 and two end walls 4.
  • the end walls are provided with central holes and a spout 5 is con­nected to the edge of said holes.
  • Such an inner bag is manufactured by sealing, connecting by hot-melt, adhering or connecting fluid-­proof or in any other way cut-to-size parts to one another.
  • Two tabs 6 project from the two end walls 4. These tabs can simply be pairwise extensions of the pertaining side walls 3 and be con­nected, in the manner represented in fig. 2, to the outer bag 1 by a stitching 7. However, it is also possible that the tabs 6 consist of another material than that of the inner bag 2.
  • the outer bag has an exterior appearance that corresponds with that of the inner bag, and thus it also com­prises spouts.
  • the bottom spouts are firmly tied with a rope or a cord. The same is done to the upper spout, if present, after filling.
  • the rope or cord should be applied as far as possible from the outer ends of the spouts; not only to provide optimum stability during transportation, but also to be able, when filling the bag, to insert the inner spout into a discharge tube first, then to attach the outer spout to the periphery of the tube by means of a rope, cord or the like and finally to remove the first-mentioned rope or cord.
  • at least two crane hooks have been applied at the top of the outer bags, which are not shown in the drawing because they are not covered by the scope of the present invention
  • the inner bag 12 represented in fig. 3 consists of a seamless tubu­lar polyethylene film.
  • a set of two tabs 16 of the same material has been adhered, sealed or applied in some other fluid-proof manner such as hot-melt, at such a distance from the end walls that those portions of the tube facing away from the tabs 16 can be formed into a spout and then be projected through the corresponding spout (not drawn) of the outer bag and there tied with e.g. a rope or cord.
  • the connection between the tabs 16 and the outer bag may again consist of a stitching or any other non-­fluid-proof connection.
  • Fig. 4-6 relate to alternatives in which the inner bag is not per­manently connected to the outer bag, so that these alternatives can be used for a re-usable outer bag and disposable inner bag.
  • a single rope or cord 28 is connected to the end of each tab 26, which rope or cord can, in the manner shown in fig. 5, extend through two holes 27 of the outer bag.
  • a doubled-up rope or cord is attached, each of the legs of which can be projected through a hole 27, after which the legs can be tied together.
  • the connection of the rope or cord 28 to the tabs 26 may consist of stitching threads 29.
  • Figs. 7 and 8 relate to an inner bag 32 having, over the greater part of its height and when being filled, a tubular outer wall 33, and a square bottom 34. A square hole has been made in said bottom, and a spout 35 is connected to the edges of said hole. The top of this inner bag is open.
  • Fig. 8 clarifies that the periphery of the rectangular bottom 34 is substantially equal to the periphery of the unloaded tubular shape of the side wall 33.
  • manufacturing of the square bottom 34 can be performed by folding an extruded tube into a broad upper ply 39, two pairs of smaller inner plies 40, 41 and a lower broad ply 42. Those plies are delimited by four outer folds 43 and two inner folds 44. Each of the four pairs of outer and inner plies are then heat-welded and cut along a first line 37 parallel to the longitudinal axis of the tube for forming the discharge spout 35, and along a second line 38 at an angle of substantially 45° in re­lation to the first line, which second lines extend between the discharge spout and the corners of the bottom of the outer bag when the double-walled bag has been loaded.
  • the trapezoid-shaped corners delimited by lines 37 and 38 in Fig. 9 have thus to be considered as waste material.
  • the advantage, how­ever, is that the inner bag is provided with a spout in an effi­cient and reliable way.
  • the inner bag 33 can also comprise two peripherally extending tabs 36.
  • Embodiments in which the tab or tabs 6, 16, 26, 36 of the inner bag are connected in other ways to the outer bag are also within the scope of the invention.
  • press-studs, Velcro and the like fastening means are considered, which are certainly useful in cases in which the inner bag exerts forces that are parallel to the wall during emptying, whereas it is also possible to consider a slipknot connection in the outer bag, so that its strength is not affected by the holes 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
EP88201408A 1987-07-08 1988-07-06 Doppelwandiger Grosssack Withdrawn EP0300539A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8701607 1987-07-08
NL8701607A NL8701607A (nl) 1987-07-08 1987-07-08 Dubbelwandige zak van hoog draagvermogen.

Publications (1)

Publication Number Publication Date
EP0300539A1 true EP0300539A1 (de) 1989-01-25

Family

ID=19850278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88201408A Withdrawn EP0300539A1 (de) 1987-07-08 1988-07-06 Doppelwandiger Grosssack

Country Status (5)

Country Link
EP (1) EP0300539A1 (de)
DK (1) DK385188A (de)
FI (1) FI883205A (de)
NL (1) NL8701607A (de)
NO (1) NO883031L (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372153A1 (de) * 1988-12-05 1990-06-13 HABERL Gesellschaft m.b.H. Flexibler container
EP0703162A1 (de) * 1994-09-09 1996-03-27 Rohm And Haas Company Recyclebarer, flexibler Schüttgutbehälter
WO1999064324A1 (en) * 1998-06-09 1999-12-16 Lance John Muller Liner bag for flexible bulk container
WO2014039016A1 (en) * 2012-09-10 2014-03-13 Natthi Cholsaipant Liner for a bulk bag, bulk bag with inner liner and method of making the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2251489A1 (de) * 1973-11-16 1975-06-13 Us Lines Inc
EP0105238A2 (de) * 1982-09-30 1984-04-11 Custom Packaging Systems, Inc. Sackartiger Grossbehälter für Schüttgüter
FR2570352A1 (fr) * 1984-09-19 1986-03-21 Est Papeterie Conteneur etanche pour le conditionnement de produits pulverulents
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2251489A1 (de) * 1973-11-16 1975-06-13 Us Lines Inc
EP0105238A2 (de) * 1982-09-30 1984-04-11 Custom Packaging Systems, Inc. Sackartiger Grossbehälter für Schüttgüter
FR2570352A1 (fr) * 1984-09-19 1986-03-21 Est Papeterie Conteneur etanche pour le conditionnement de produits pulverulents
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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372153A1 (de) * 1988-12-05 1990-06-13 HABERL Gesellschaft m.b.H. Flexibler container
EP0703162A1 (de) * 1994-09-09 1996-03-27 Rohm And Haas Company Recyclebarer, flexibler Schüttgutbehälter
US5938338A (en) * 1994-09-09 1999-08-17 Rohm & Haas Company Recycleable bulk bag containers
CN1064918C (zh) * 1994-09-09 2001-04-25 罗姆和哈斯公司 可反复使用的散装袋容器
WO1999064324A1 (en) * 1998-06-09 1999-12-16 Lance John Muller Liner bag for flexible bulk container
US6374579B1 (en) 1998-06-09 2002-04-23 Lance John Muller Liner bag for flexible bulk container
AU766785B2 (en) * 1998-06-09 2003-10-23 Lance John Muller Liner bag for flexible bulk container
AP1295A (en) * 1998-06-09 2004-09-03 Lance John Muller Liner bag for flexible bulk container.
WO2014039016A1 (en) * 2012-09-10 2014-03-13 Natthi Cholsaipant Liner for a bulk bag, bulk bag with inner liner and method of making the same

Also Published As

Publication number Publication date
DK385188D0 (da) 1988-07-08
DK385188A (da) 1989-01-09
NO883031D0 (no) 1988-07-06
NL8701607A (nl) 1989-02-01
FI883205A0 (fi) 1988-07-05
NO883031L (no) 1989-01-09
FI883205A (fi) 1989-01-09

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