EP0047389B1 - Flexible container for transporting and storing bulk goods - Google Patents

Flexible container for transporting and storing bulk goods Download PDF

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Publication number
EP0047389B1
EP0047389B1 EP81105952A EP81105952A EP0047389B1 EP 0047389 B1 EP0047389 B1 EP 0047389B1 EP 81105952 A EP81105952 A EP 81105952A EP 81105952 A EP81105952 A EP 81105952A EP 0047389 B1 EP0047389 B1 EP 0047389B1
Authority
EP
European Patent Office
Prior art keywords
strip
parts
container
loops
flexible 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.)
Expired
Application number
EP81105952A
Other languages
German (de)
French (fr)
Other versions
EP0047389A1 (en
Inventor
Kauko Nieminen
Per Nyman
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.)
W Rosenlew Oy AB
Original Assignee
W Rosenlew Oy AB
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 W Rosenlew Oy AB filed Critical W Rosenlew Oy AB
Priority to AT81105952T priority Critical patent/ATE17696T1/en
Publication of EP0047389A1 publication Critical patent/EP0047389A1/en
Application granted granted Critical
Publication of EP0047389B1 publication Critical patent/EP0047389B1/en
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]
    • 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

  • the present invention concerns a flexible container in accordance to the preamble of claim 1.
  • Containers of this type are used for transporting and storing bulk goods, and the quantity of bulk goods is usually from a few hundred kilograms to several tons.
  • Such large-size bags have previously been manufactured in that a piece of material has been folded double and the doubled piece of material has been united by a seam in its upper part, which at the same time constitutes the lifting loop or loops of the large-size bag. Since in such large-size bags the seam is exactly at the point where the large-size bag is subjected to highest stresses for instance when being lifted, a large-size bag of this kind is susceptible to rupturing along the seam in the lifting loops.
  • a container as described in the precharacterizing part of Claim 1 is disclosed in the Finnish patent 57381 corresponding to EP-A-0 026 287.
  • the lifting loops have been formed of strip-like parts which are straight extensions of the upper part of the tubular body.
  • Such strip-like parts have been joined by connecting seams with each other so that said connecting seams have been disposed to run at a distance from the central area of the lifting loop.
  • Such strip-like parts have furthermore been disposed to be mutually overlapping so that the lower margin of one strip-like part has been joined by a connecting seam to the upper margin of the other strip-like part.
  • the upper margin of the first-mentioned strip-like parts of one hand may be moreover joined by a connecting seam to the lower edge of said other strip-like parts.
  • the object of the invention is attained with a flexible container as characterized in claim 1.
  • the other characteristic features of the container of the invention are readable in claims 2 and 3.
  • the flexible container 10 has been made of a tubular blank 11, which is open both at its upper and lower end. At the upper end of the blank 11, substantially in the centre, has been made a cut for the filling aperture 13. Moreover, at the upper end of the blank have been made cuts 18 which confine strip-like parts 14a, 14b, 15a and 15b. The lower margin of the tubular blank 11 is indicated with the reference numeral 19.
  • the tubular blank of Figs. 1 and 2 is processed into a flexible container as shown in Fig. 3, having a body 11a, bottom 12, substantially central filling aperture 13, and lifting loops 14a, 15a and 14b, 15b.
  • the bottom 12 of the container is closed by a connecting seam 20, known in itself in the art, closing the open lower margin 19 of the tubular blank 11.
  • the connecting seam 20 is then located substantially in the central region of the bottom 12.
  • the flexible container 10 is in this embodiment a so-called pleated container in the body part of which, 11a, two mutually opposed pleats have been formed. Only one of the pleats is visible in Fig. 3, this pleat being formed as indicated by the interrupted line 21; in other words, the lower part of the pleat 21 has been folded to lie in the plane of the bottom 12 of the container 10.
  • the strip-like parts 14a and 15a, and 14b and 15b respectively, shown in Fig. 4 are folded strip-like parts presenting a lower plane 22 of the fold and, similarly, an upper plane 23 of the fold.
  • the mutually opposing planes 22 and 23 of the fold have substantially equal width and they hang together at one lateral edge 24 of the fold.
  • the folded strip-like parts 14a and 15a, and 14b and 15b respectively, have been disposed so as to overlap in requisite amount; and the strip-like parts 14a and 15a, and 14b and 15b respectively, have been joined by the connecting seam 25.
  • the connecting seam 25 may also be located at a substantial distance from the central region of the lifting loops, as is suggested by the connecting seams indicated with 16 and 17 in Fig. 3.
  • the lifting loops consist in this embodiment of the quadruple material thickness throughout the whole lifting loop structure.
  • the folded structure of the strip-like parts 14a, and 15a respectively may also be such that one opposing plane of the fold, e.g. the lower plane 22, is less in width and only extends across part of the breadth of the upper plane 23.
  • a certain part of the structure of the lifting loop construction will consist of the quadruple material thickness and a certain part, of double thickness material.
  • the folded strip-like part 15a, respectively 15b has been disposed to be inside the folded strip-like parts 14a, or 14b respectively.
  • the embodiment depicted in Fig. 6 is the same as that of Fig. 4.
  • the pleated lifting loop structure of the invention tolerates stresses which are about 20 to 30% higher than those tolerated by the lifting loop structure disclosed in the Finnish patent 57381, the fact notwithstanding that in the lifting loop structure of the invention the connecting seam 25 may be located substantially in the central region of the lifting loops.
  • This mode of manufacturing also saves raw material, depending on the length of the blank, between 5 and 15%.
  • the greatest advantage of the lifting loop structure of the invention lies in the fact that when flexible containers conforming to the invention are being made, the connecting seam 25 of the lifting loops can be accomplished with the aid of one single automatic sewing machine.
  • the flexible container fitted with lifting loops according to the invention is in no way critical as regards the remaining part of the container.
  • a very high-strength bottom structure is also obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Refuse Collection And Transfer (AREA)
  • Cartons (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Peptides Or Proteins (AREA)
  • Packages (AREA)

Abstract

A flexible container (10) for transporting and storing bulk goods, comprising a shell (11a), bottom (12) and filling aperture (13) and provided with lifting loops (14a, 15a, 14b, 15b), these loops having been formed of strip-like parts (14a, 14b, 15a, 15b) constituting straight extensions of the upper part of the shell and joined together by one or several seams (16, 17), wherein with a view to affording adequate strength to said loops the strip-like parts are pleated, presenting a lower and upper plane and have been overlapped. The pleated strip-like parts to be joined together may be inserted one in the fold of the other. The connecting seam may be located substantially in the central region of the lifting loop.

Description

  • The present invention concerns a flexible container in accordance to the preamble of claim 1.
  • Containers of this type, or large-size bags, are used for transporting and storing bulk goods, and the quantity of bulk goods is usually from a few hundred kilograms to several tons. Such large-size bags have previously been manufactured in that a piece of material has been folded double and the doubled piece of material has been united by a seam in its upper part, which at the same time constitutes the lifting loop or loops of the large-size bag. Since in such large-size bags the seam is exactly at the point where the large-size bag is subjected to highest stresses for instance when being lifted, a large-size bag of this kind is susceptible to rupturing along the seam in the lifting loops.
  • A container as described in the precharacterizing part of Claim 1, is disclosed in the Finnish patent 57381 corresponding to EP-A-0 026 287. On this container the lifting loops have been formed of strip-like parts which are straight extensions of the upper part of the tubular body. Such strip-like parts have been joined by connecting seams with each other so that said connecting seams have been disposed to run at a distance from the central area of the lifting loop. Such strip-like parts have furthermore been disposed to be mutually overlapping so that the lower margin of one strip-like part has been joined by a connecting seam to the upper margin of the other strip-like part. If required, the upper margin of the first-mentioned strip-like parts of one hand may be moreover joined by a connecting seam to the lower edge of said other strip-like parts.
  • It is achieved by this design of prior art that the lifting loops tolerate in relatively reliable manner those high stresses which may in conditions of practice bear upon the lifting loops. Owing to the location of the connecting seams, however, the automated manufacturing of flexible containers is exceedingly difficult to carry out as regards the lifting loops. Moreover, the said mode of manufacturing uses an unnecessary quantity of material because the connecting seams lie at a considerable distance from the central area of the lifting loops.
  • The object of the invention is to provide a flexible container which can be formed of a tubular blank in such manner that the lifting loops of the flexible container can be made on modern automatic sewing machines in simplest possible way. Still one object of the invention is to provide a flexible container where the lifting loops endure in a reliable manner also stresses higher than the usual stresses.
  • The object of the invention is attained with a flexible container as characterized in claim 1. The other characteristic features of the container of the invention are readable in claims 2 and 3.
  • The invention is described in detail with reference being made to certain advantageous embodiments of the invention, presented in the figures of the attached drawing, but to which the invention is not meant to be exclusively confined.
    • Fig. 1 presents in elevational view the blank, having the shape of a cut length of tube.
    • Fig. 2 is an axonometric presentation of the blank of Fig. 1.
    • Fig. 3 presents, in axonometric presentation, the flexible container made of the blank of Figs. 1 and 2.
    • Fig. 4 presents, in axonometric presentation, an advantageous embodiment of the lifting loop structure of the invention.
    • Fig. 5 shows the section carried along the line V-V in Fig. 4.
    • Fig. 6 presents another favourable embodiment of the lifting loop design of the invention, in axonometric presentation.
  • In the embodiments of Figs. 1 to 3, the flexible container 10 has been made of a tubular blank 11, which is open both at its upper and lower end. At the upper end of the blank 11, substantially in the centre, has been made a cut for the filling aperture 13. Moreover, at the upper end of the blank have been made cuts 18 which confine strip- like parts 14a, 14b, 15a and 15b. The lower margin of the tubular blank 11 is indicated with the reference numeral 19.
  • The tubular blank of Figs. 1 and 2 is processed into a flexible container as shown in Fig. 3, having a body 11a, bottom 12, substantially central filling aperture 13, and lifting loops 14a, 15a and 14b, 15b. The bottom 12 of the container is closed by a connecting seam 20, known in itself in the art, closing the open lower margin 19 of the tubular blank 11. The connecting seam 20 is then located substantially in the central region of the bottom 12. As can be seen in Fig. 3, the flexible container 10 is in this embodiment a so-called pleated container in the body part of which, 11a, two mutually opposed pleats have been formed. Only one of the pleats is visible in Fig. 3, this pleat being formed as indicated by the interrupted line 21; in other words, the lower part of the pleat 21 has been folded to lie in the plane of the bottom 12 of the container 10.
  • In accordance with the fundamental insight of the invention, the strip- like parts 14a and 15a, and 14b and 15b respectively, shown in Fig. 4 are folded strip-like parts presenting a lower plane 22 of the fold and, similarly, an upper plane 23 of the fold. In this embodiment the mutually opposing planes 22 and 23 of the fold have substantially equal width and they hang together at one lateral edge 24 of the fold. The folded strip- like parts 14a and 15a, and 14b and 15b respectively, have been disposed so as to overlap in requisite amount; and the strip- like parts 14a and 15a, and 14b and 15b respectively, have been joined by the connecting seam 25. It should be particularly noted that owing to the folded structure of the strip- like parts 14a and 15a, and 14b and 15b respectively, the connecting seam 25 may also be located at a substantial distance from the central region of the lifting loops, as is suggested by the connecting seams indicated with 16 and 17 in Fig. 3.
  • As can be seen in Fig. 5, in the lifting loop design of Fig. 4, the lifting loops consist in this embodiment of the quadruple material thickness throughout the whole lifting loop structure. Naturally, the folded structure of the strip- like parts 14a, and 15a respectively, may also be such that one opposing plane of the fold, e.g. the lower plane 22, is less in width and only extends across part of the breadth of the upper plane 23. In that case, a certain part of the structure of the lifting loop construction will consist of the quadruple material thickness and a certain part, of double thickness material.
  • In the embodiment of Fig. 6, the folded strip-like part 15a, respectively 15b, has been disposed to be inside the folded strip- like parts 14a, or 14b respectively. In other respects, the embodiment depicted in Fig. 6 is the same as that of Fig. 4.
  • In tests in actual practice the surprising observation has been made that the pleated lifting loop structure of the invention tolerates stresses which are about 20 to 30% higher than those tolerated by the lifting loop structure disclosed in the Finnish patent 57381, the fact notwithstanding that in the lifting loop structure of the invention the connecting seam 25 may be located substantially in the central region of the lifting loops. This mode of manufacturing also saves raw material, depending on the length of the blank, between 5 and 15%. However, the greatest advantage of the lifting loop structure of the invention lies in the fact that when flexible containers conforming to the invention are being made, the connecting seam 25 of the lifting loops can be accomplished with the aid of one single automatic sewing machine.
  • The flexible container fitted with lifting loops according to the invention is in no way critical as regards the remaining part of the container. When using a flexible container in the shell of which pleats have been formed of which the lower parts have been folded to be complanar with the bottom of the container, it is to advantage to use the bottom design disclosed in the European patent application No. 81105951.8 W EP-A1-0 046 220, where the free lower margin of the tubular blank has been closed with a bottom seam known in itself in the art, located substantially in the central region of the container's bottom, and where the upper plane of the pleat folded into the container bottom's plane has been affixed by a connecting seam to the lower plane. Hereby a very high-strength bottom structure is also obtained.

Claims (3)

1. A flexible container (10) for transporting and storing bulk goods, said container including a tubular body (11a), a bottom (12) and a filling aperture (13), said container (10) being provided with lifting loops by which said container can be lifted, said lifting loops being formed of strip-like parts (14a, 14b, 15a, 15b) constituted by substantially straight extensions of the upper portion of said tubular body (11 a), and wherein respective pairs of said strip-like parts are joined to each other by at least one connecting seam, characterized in that: said strip-like parts (14a, 14b, 15a, 15b) are constituted by forming two substantially longitudinally extending mutually opposed pleats in said tubular body (11 a), each pleat having an inner fold line (21) which is separated (18) along an upper length thereof to define folded strip-like parts (14a, 14b, 15a, 15b), each folded strip-like part including an inner or lower fold plane (22) and an outer or upper fold plane (23); and in that each respective pair of said folded strip-like parts are disposed in overlapping relationship and joined to each other by at least one connecting seam (25).
2. Container according to claim 1, characterized in that one folded strip-like part (15a, and 15b respectively) has been inserted in the fold of the other folded strip-like part (14a, 14b).
3. Container according to claim 1 or 2, characterized in that the connecting seam (25) is located substantially in the central region of the lifting loops.
EP81105952A 1980-09-10 1981-07-28 Flexible container for transporting and storing bulk goods Expired EP0047389B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105952T ATE17696T1 (en) 1980-09-10 1981-07-28 FLEXIBLE CONTAINER FOR TRANSPORT AND STORAGE OF BULK GOODS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI802846A FI60175C (en) 1980-09-10 1980-09-10 FLEXIBEL BEHAOLLARE FOER TRANSPORT OCH LAGRING AV MASSAGODS
FI802846 1980-09-10

Publications (2)

Publication Number Publication Date
EP0047389A1 EP0047389A1 (en) 1982-03-17
EP0047389B1 true EP0047389B1 (en) 1986-01-29

Family

ID=8513757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105952A Expired EP0047389B1 (en) 1980-09-10 1981-07-28 Flexible container for transporting and storing bulk goods

Country Status (12)

Country Link
EP (1) EP0047389B1 (en)
AT (1) ATE17696T1 (en)
BG (1) BG43525A3 (en)
CS (1) CS226033B2 (en)
DD (1) DD201660A5 (en)
DE (1) DE3173626D1 (en)
FI (1) FI60175C (en)
HU (1) HU187358B (en)
NO (1) NO159370C (en)
PL (1) PL128863B1 (en)
RO (1) RO82238B (en)
YU (1) YU42250B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8228653U1 (en) * 1982-10-12 1982-12-23 Unilever N.V., 3000 Rotterdam Plastic bag
ES296232Y (en) * 1984-12-21 1988-04-16 Norsk Hydro A.S. A FLEXIBLE CONTAINER FOR THE TRANSPORT AND STORAGE OF BULK MATERIAL
NO161111C (en) * 1987-04-24 1989-07-05 Norsk Hydro As LARGE BAG WITH AT LEAST TWO INTEGRATED LIFTING BELTS.
NO883257L (en) * 1987-08-31 1989-03-01 Norsk Hydro As LARGE BAG WITH IMPROVED LIFTING STRIP.
GB8800883D0 (en) * 1988-01-15 1988-02-17 Id Tech Ltd Single-use syringe
IE76456B1 (en) * 1990-09-11 1997-10-22 Christopher C Cuddy Bulk containers
GB2366758A (en) * 2000-08-07 2002-03-20 Dorton Packaging Ltd Extensions of material from a bag body, such as bulk material bag, are folded and joined, eg. stiched, to form handles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO138134C (en) * 1976-06-28 1978-07-12 Norsk Hydro As FLEXIBLE CONTAINER FOR TRANSPORT AND STORAGE OF MASSAGE PRODUCTS, AND PROCEDURE FOR ITS MANUFACTURE

Also Published As

Publication number Publication date
RO82238A (en) 1984-06-21
PL232928A1 (en) 1982-03-29
NO812819L (en) 1982-03-11
EP0047389A1 (en) 1982-03-17
FI60175B (en) 1981-08-31
PL128863B1 (en) 1984-03-31
NO159370B (en) 1988-09-12
CS226033B2 (en) 1984-03-19
BG43525A3 (en) 1988-06-15
YU217881A (en) 1983-06-30
ATE17696T1 (en) 1986-02-15
FI60175C (en) 1981-12-10
HU187358B (en) 1985-12-28
DE3173626D1 (en) 1986-03-13
RO82238B (en) 1984-08-30
DD201660A5 (en) 1983-08-03
NO159370C (en) 1988-12-21
YU42250B (en) 1988-06-30

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