WO1989009171A1 - A flexible container for fluids - Google Patents

A flexible container for fluids Download PDF

Info

Publication number
WO1989009171A1
WO1989009171A1 PCT/FI1988/000047 FI8800047W WO8909171A1 WO 1989009171 A1 WO1989009171 A1 WO 1989009171A1 FI 8800047 W FI8800047 W FI 8800047W WO 8909171 A1 WO8909171 A1 WO 8909171A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
outer sack
sack
container
support pillars
Prior art date
Application number
PCT/FI1988/000047
Other languages
French (fr)
Inventor
Christian Wiklund
Original Assignee
Oy Fluid-Bag 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
Priority to FI863992A priority Critical patent/FI76764C/en
Application filed by Oy Fluid-Bag Ab filed Critical Oy Fluid-Bag Ab
Priority to DE3887169T priority patent/DE3887169T2/en
Priority to AU15769/88A priority patent/AU628287B2/en
Priority to PCT/FI1988/000047 priority patent/WO1989009171A1/en
Priority to EP88903252A priority patent/EP0406233B1/en
Priority to BR888807900A priority patent/BR8807900A/en
Priority to US07/573,167 priority patent/US5025925A/en
Priority to AT88903252T priority patent/ATE100056T1/en
Publication of WO1989009171A1 publication Critical patent/WO1989009171A1/en

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
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • B65D90/20—Frames or nets, e.g. for flexible containers
    • B65D90/205—Frames or nets, e.g. for flexible containers for flexible containers, i.e. the flexible container being permanently connected to the frame
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
    • B65D77/06—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers
    • B65D77/061—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers the containers being mounted on a pallet
    • 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
    • B65D2588/00—Large container
    • B65D2588/16—Large container flexible
    • B65D2588/162—Flexible intermediate bulk containers [FIBC]
    • B65D2588/165—FIBC on a pallet base

Definitions

  • a flexible container for fluids for fluids
  • the present invention relates to a flexible container for fluids, comprising a liquid-proof inner bag; a substantially cylindrical outer sack which sur ⁇ rounds the inner bag and the mantle surface of which is provided with channels for support pillars, said channels extending in parallel with the central line of the outer sack; and means for filling and emptying the container.
  • This type of containers known from the prior art are intended for the transport and storage of dif ⁇ ferent kinds of fluids, such as liquids, viscous sub ⁇ stances, and bulk goods.
  • Such containers are usually manufactured in two sizes: five hundred litres and a thousand litres.
  • the containers are disposable and they are transported to the user in folded position.
  • support pillars are inserted in the channels provided in the mantle surface of the outer sack, and the support pillars are fastened to a con ⁇ ventional pallet of wood, which makes the container easier to displace.
  • the support pillars keep the con ⁇ tainer in upright position on the pallet.
  • the support pillars are mounted pivotably to the pallet by means of parallel metal shafts, which are secured to the pallet and extend through the sup ⁇ port pillars. This way of mounting is used so as to reduce strains exerted on the support pillars on the pallet.
  • the support pillars are po ⁇ sitioned in channels provided in the mantle surface of the outer sack.
  • the channels are formed by pockets open at the bottom and closed at the top.
  • the pockets are formed by sewing elongated material strips onto the mantle surface of the outer sack, whereby the strips are sufficiently broad for the support pillars to be easily inserted into the space between the mantle of the outer sack and the material strip.
  • the object of the present invention is to pro ⁇ vide a container in which the above-mentioned strains are considerably reduced as compared with containers known from the prior art.
  • the container according to the invention is characterized in that an outer and an inner side wall of the channels have substantially the same dimension in the peripheral direction of the outer sack.
  • Channels formed in this way have the advantage that both side walls are strained when the container is filled, whereby they adhere to the support pillar. This results in great friction forces between the side walls of the channel and the support pillar so that strains caused by retardation will not focus on the upper end of the forward support pillars and on the lower end of the backward support pillars. Instead, they are distributed over the whole length of the sup- port pillars.
  • the disadvantageous spot load occurring in containers known from the prior art because the container is to some extent movable with respect to the support pillars is thereby avoided.
  • the container according to the invention is locked in place with respect to the sup ⁇ port pillars, which prevents the back portion of the container from rising up on braking.
  • the channels according to the invention also have the advantage that they do not project from the mantle surface of the outer sack to such an extent as known channels. Therefore the channels are less ex ⁇ posed to shocks as prior channels.
  • both chan- nel walls are integral with the mantle of the outer sack.
  • the fabric is formed in this way known per se, the two seams in each channel are omitted, which naturally considerably simplifies the manufacture of the container.
  • Figure 1 is a perspective view of a container according to the invention.
  • Figure 2 illustrates a detail of the mantle surface of the outer sack in a horizontal section.
  • Figure 1 shows a flexible container comprising a liquid-proof inner bag 1 of e.g. a thin polyethylene film; and a cylindrical outer sack 2 which surrounds the inner bag and is formed of e.g. a durable polypro ⁇ pylene fabric.
  • the upper end face of the container is provided with a filling funnel 3 whereas the lower end face is provided with an emptying valve not shown.
  • the mantle surface of the outer sack is pro- vided with four channels 4 which are parallel with the central axis of the sack and which are closed at the top and open at the bottom.
  • a support pillar 5 of e.g. wood is inserted in each channel.
  • Each support pillar is secured to a conventional pallet 6 of wood by means of a metal shaft 7.
  • the shaft is fastened to the pal ⁇ let and it extends through the support pillar so that the pillar is pivotable round the shaft 7 to some ex ⁇ tent.
  • the outer side wall 8 of the channels i.e., the side wall on the outer side of the support pillar, and the inner side wall 9 on the inside of the support pillar have substantially the same dimension in the peripheral direction of the outer sack. This appears most clearly from Figure 2.
  • the dimension of the side wall in the peripheral di ⁇ rection of the outer sack refers to the width of the wall between lines along which the side walls adjoin to form a single wall.
  • the mantle of the outer sack preferably consists of a fabric which is manufactured so that the mantle wall and the side walls 8, 9 are integral with each other.
  • the container is transported in the position shown in Figure 1 except that the filling funnel 3 is closed.
  • the support pillars 5 When decelerating a movement perpendicular to the shafts 7, the support pillars 5 are pivoted around the shafts and the container assumes a forwardly in ⁇ clined position. Thereby the support pillars cause strains on the outer sack especially at the upper end of the forward pillars. Due to the high friction be ⁇ tween the pillars 5 and the side walls 8, 9 of the channels, the load is, however, distributed over the whole length of the mantle surface so that the load is at its maximum at the upper end of the channels and at its minimum at the lower end. This distribution of the forces over a larger area naturally reduces the peak loads.
  • the outer side wall 8 in order that the channels would function as desired the outer side wall 8 must not be broader than the inner side wall 9. However, the inner side wall may be somewhat broader than the outer one, because the pressure of the fluid in the container presses the inner side wall against the support pillar 5.

Abstract

The invention relates to a flexible container for fluids, comprising an inner bag (1) of a thin material and an outer sack (2) of a durable fabric. The outer sack (2) is cylindrical and its mantle surface is provided with channels (4) for receiving support pillars (5) fastened to a wooden pallet (6). At deceleration during the transport of a full container, the upper ends of the forward support pillars exert great spot loads on the outer sack (2). Such loads can be avoided to a great extent if an outer and an inner side wall (8, 9) of the channels (4) are equally broad in the peripheral direction of the outer sack.

Description

A flexible container for fluids
The present invention relates to a flexible container for fluids, comprising a liquid-proof inner bag; a substantially cylindrical outer sack which sur¬ rounds the inner bag and the mantle surface of which is provided with channels for support pillars, said channels extending in parallel with the central line of the outer sack; and means for filling and emptying the container.
This type of containers known from the prior art are intended for the transport and storage of dif¬ ferent kinds of fluids, such as liquids, viscous sub¬ stances, and bulk goods. Such containers are usually manufactured in two sizes: five hundred litres and a thousand litres. The containers are disposable and they are transported to the user in folded position. Before filling, support pillars are inserted in the channels provided in the mantle surface of the outer sack, and the support pillars are fastened to a con¬ ventional pallet of wood, which makes the container easier to displace. The support pillars keep the con¬ tainer in upright position on the pallet.
The support pillars are mounted pivotably to the pallet by means of parallel metal shafts, which are secured to the pallet and extend through the sup¬ port pillars. This way of mounting is used so as to reduce strains exerted on the support pillars on the pallet. As mentioned above, the support pillars are po¬ sitioned in channels provided in the mantle surface of the outer sack. The channels are formed by pockets open at the bottom and closed at the top. The pockets are formed by sewing elongated material strips onto the mantle surface of the outer sack, whereby the strips are sufficiently broad for the support pillars to be easily inserted into the space between the mantle of the outer sack and the material strip.
During transport, full containers are often ex- posed to variations in the transport velocity, whereby retardations in particular may be drastic. At retarda¬ tion the fluid tends to continue its movement onwards more rapidly than the pallet, wherefore the support pillars swing onwards. The back portion of the sack is thereby lifted upwards along the backward support pil¬ lars, and the upper and lower surface of the sack takes an inclined position. The outer sack is thereby exposed to high strains especially at the upper ends of the forward support pillars, but to a certain ex- tent also at the lower ends of the backward support pillars, which may result in breakage in the outer sack.
The object of the present invention is to pro¬ vide a container in which the above-mentioned strains are considerably reduced as compared with containers known from the prior art. The container according to the invention is characterized in that an outer and an inner side wall of the channels have substantially the same dimension in the peripheral direction of the outer sack.
Channels formed in this way have the advantage that both side walls are strained when the container is filled, whereby they adhere to the support pillar. This results in great friction forces between the side walls of the channel and the support pillar so that strains caused by retardation will not focus on the upper end of the forward support pillars and on the lower end of the backward support pillars. Instead, they are distributed over the whole length of the sup- port pillars. The disadvantageous spot load occurring in containers known from the prior art because the container is to some extent movable with respect to the support pillars is thereby avoided. As a result of the great friction forces between the support pillars and the channel wall, the container according to the invention is locked in place with respect to the sup¬ port pillars, which prevents the back portion of the container from rising up on braking.
The channels according to the invention also have the advantage that they do not project from the mantle surface of the outer sack to such an extent as known channels. Therefore the channels are less ex¬ posed to shocks as prior channels.
According to a preferred embodiment, both chan- nel walls are integral with the mantle of the outer sack. When the fabric is formed in this way known per se, the two seams in each channel are omitted, which naturally considerably simplifies the manufacture of the container. A preferred embodiment of the container accord¬ ing to the invention will be described in more detail in the following with reference to the attached draw¬ ing, wherein
Figure 1 is a perspective view of a container according to the invention; and
Figure 2 illustrates a detail of the mantle surface of the outer sack in a horizontal section.
Figure 1 shows a flexible container comprising a liquid-proof inner bag 1 of e.g. a thin polyethylene film; and a cylindrical outer sack 2 which surrounds the inner bag and is formed of e.g. a durable polypro¬ pylene fabric. The upper end face of the container is provided with a filling funnel 3 whereas the lower end face is provided with an emptying valve not shown. The mantle surface of the outer sack is pro- vided with four channels 4 which are parallel with the central axis of the sack and which are closed at the top and open at the bottom. A support pillar 5 of e.g. wood is inserted in each channel. Each support pillar is secured to a conventional pallet 6 of wood by means of a metal shaft 7. The shaft is fastened to the pal¬ let and it extends through the support pillar so that the pillar is pivotable round the shaft 7 to some ex¬ tent. According to the invention the outer side wall 8 of the channels, i.e., the side wall on the outer side of the support pillar, and the inner side wall 9 on the inside of the support pillar have substantially the same dimension in the peripheral direction of the outer sack. This appears most clearly from Figure 2. The dimension of the side wall in the peripheral di¬ rection of the outer sack refers to the width of the wall between lines along which the side walls adjoin to form a single wall. The mantle of the outer sack preferably consists of a fabric which is manufactured so that the mantle wall and the side walls 8, 9 are integral with each other.
The container is transported in the position shown in Figure 1 except that the filling funnel 3 is closed. When decelerating a movement perpendicular to the shafts 7, the support pillars 5 are pivoted around the shafts and the container assumes a forwardly in¬ clined position. Thereby the support pillars cause strains on the outer sack especially at the upper end of the forward pillars. Due to the high friction be¬ tween the pillars 5 and the side walls 8, 9 of the channels, the load is, however, distributed over the whole length of the mantle surface so that the load is at its maximum at the upper end of the channels and at its minimum at the lower end. This distribution of the forces over a larger area naturally reduces the peak loads.
It is to be understood that in order that the channels would function as desired the outer side wall 8 must not be broader than the inner side wall 9. However, the inner side wall may be somewhat broader than the outer one, because the pressure of the fluid in the container presses the inner side wall against the support pillar 5.

Claims

Claims :
1. A flexible container for fluids, comprising a liquid-proof inner bag (1); a substantially cylin- drical outer sack (2) which surrounds the inner bag and the mantle surface of which is provided with chan¬ nels (4) for support pillars (5), said channels ex¬ tending in parallel with the central axis of the outer sack; and means (3) for filling and emptying the con- tainer, c h a r a c t e ri z e d in that an outer and an inner side wall (8, 9) of the channels (4) have substantially the same dimension in the peripheral di¬ rection of the outer sack (2) .
2. A container according to claim 1, c h a r- a c t e r i z e d in that both channel walls (8, 9) are integral with the mantle of the outer sack (2) .
PCT/FI1988/000047 1986-10-02 1988-03-31 A flexible container for fluids WO1989009171A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI863992A FI76764C (en) 1986-10-02 1986-10-02 Flexible container for fluids
DE3887169T DE3887169T2 (en) 1988-03-31 1988-03-31 BENDABLE TANK FOR LIQUIDS.
AU15769/88A AU628287B2 (en) 1988-03-31 1988-03-31 A flexible container for fluids
PCT/FI1988/000047 WO1989009171A1 (en) 1988-03-31 1988-03-31 A flexible container for fluids
EP88903252A EP0406233B1 (en) 1988-03-31 1988-03-31 A flexible container for fluids
BR888807900A BR8807900A (en) 1988-03-31 1988-03-31 FLEXIBLE FLUID CONTAINER
US07/573,167 US5025925A (en) 1988-03-31 1988-03-31 Flexible container for fluids
AT88903252T ATE100056T1 (en) 1988-03-31 1988-03-31 FLEXIBLE CONTAINER FOR LIQUIDS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1988/000047 WO1989009171A1 (en) 1988-03-31 1988-03-31 A flexible container for fluids

Publications (1)

Publication Number Publication Date
WO1989009171A1 true WO1989009171A1 (en) 1989-10-05

Family

ID=8556443

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000047 WO1989009171A1 (en) 1986-10-02 1988-03-31 A flexible container for fluids

Country Status (8)

Country Link
US (1) US5025925A (en)
EP (1) EP0406233B1 (en)
AT (1) ATE100056T1 (en)
AU (1) AU628287B2 (en)
BR (1) BR8807900A (en)
DE (1) DE3887169T2 (en)
FI (1) FI76764C (en)
WO (1) WO1989009171A1 (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928054A1 (en) * 1989-08-25 1991-02-28 Empac Verpackungs Gmbh Flexible container for fluids - has vertical struts loosely fitting on support plate
EP0441720A1 (en) * 1990-02-09 1991-08-14 Rosenlew Sa Flexible container for liquid materials
FR2658170A1 (en) * 1990-02-09 1991-08-16 Rosenlew Sa FLEXIBLE CONTAINER FOR A FLUID MATERIAL.
US5618153A (en) * 1990-10-23 1997-04-08 Floatline Ab Arrangement pertaining to the transportation of goods
WO1993022205A1 (en) * 1990-10-23 1993-11-11 Floatline Ab An arrangement pertaining to the transportation of goods
WO1993006027A1 (en) * 1991-09-27 1993-04-01 Oy Fluid-Bag Ab Flexible container for fluids
EP0552845A1 (en) * 1992-01-23 1993-07-28 Gerardus Anthonius Maria Boots Container comprising a relatively stiff, form-retaining supporting frame and a flexible shell member arranged therein
US5289937A (en) * 1992-01-23 1994-03-01 Boots Gerardus A M Container comprising a relatively stiff, form-retaining supporting frame and a flexible shell member arranged therein
EP0573230A1 (en) * 1992-06-05 1993-12-08 Peter Jeffrey Farrell Container apparatus for fluid material
GB2270894A (en) * 1992-09-26 1994-03-30 Hydrair Ltd Supporting a flexible bag
GB2270894B (en) * 1992-09-26 1996-03-06 Hydrair Ltd Stands for flexible bags
WO1998051592A1 (en) * 1997-05-15 1998-11-19 Empac Verpackungs Gmbh Flexible packaging container for liquids
US7018098B2 (en) 2002-06-20 2006-03-28 B.A.G. Corp. Bulk bag for meat and meat products
US7086781B2 (en) 2002-06-20 2006-08-08 B.A.G. Corp. Bulk bag for meat and meat products
US7156555B2 (en) 2002-06-20 2007-01-02 B.A.G. Corp. Bulk bag for meat and meat products
US7195397B2 (en) 2002-06-20 2007-03-27 B.A.G. Corp. Bulk bag for meat and meat products
US7476028B2 (en) 2002-06-20 2009-01-13 B.A.G. Corp. Bulk bag for meat and meat products

Also Published As

Publication number Publication date
DE3887169D1 (en) 1994-02-24
US5025925A (en) 1991-06-25
BR8807900A (en) 1991-03-26
EP0406233A1 (en) 1991-01-09
FI76764B (en) 1988-08-31
AU628287B2 (en) 1992-09-17
ATE100056T1 (en) 1994-01-15
AU1576988A (en) 1989-10-16
EP0406233B1 (en) 1994-01-12
FI76764C (en) 1988-12-12
FI863992A (en) 1988-04-03
FI863992A0 (en) 1986-10-02
DE3887169T2 (en) 1994-05-19

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