CA2052088A1 - Bulk containers - Google Patents
Bulk containersInfo
- Publication number
- CA2052088A1 CA2052088A1 CA 2052088 CA2052088A CA2052088A1 CA 2052088 A1 CA2052088 A1 CA 2052088A1 CA 2052088 CA2052088 CA 2052088 CA 2052088 A CA2052088 A CA 2052088A CA 2052088 A1 CA2052088 A1 CA 2052088A1
- Authority
- CA
- Canada
- Prior art keywords
- container
- walls
- lid
- pair
- wall
- 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.)
- Abandoned
Links
Landscapes
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
ABSTRACT
A plastics container comprises a base wall, a pair of side walls and a pair of end walls, each wall comprising a pair of parallel surfaces connected and reinforced by cross pieces, the interior and exterior wall surfaces being smooth.
Insulation material may be inserted between the surfaces of the multisurface walls. One of the pairs of side and end walls has extensions extending below the base wall to leave a gap below the base wall into which fork lift truck forks can be inserted;
the walls of the other pair of walls taper at the entrance to the gap to provide a lead-in surface for the forks; a high wear resistant high density polyethylene plate is provided at such tapered portion to protect it. The container lid has an interior rim which fits within the side and end walls, the lid comprising a double surface wall which is closed at its edges and which has cross-ribs extending between the surfaces. The lid is welded to the end and side walls of the container, and has an enlarged aperture therein, an inlet feed member being received into the aperture and having a filling opening with a filling plug closing this opening. The size of the aperture is such that there is access to the interior of the container for cleaning purposes.
A plastics container comprises a base wall, a pair of side walls and a pair of end walls, each wall comprising a pair of parallel surfaces connected and reinforced by cross pieces, the interior and exterior wall surfaces being smooth.
Insulation material may be inserted between the surfaces of the multisurface walls. One of the pairs of side and end walls has extensions extending below the base wall to leave a gap below the base wall into which fork lift truck forks can be inserted;
the walls of the other pair of walls taper at the entrance to the gap to provide a lead-in surface for the forks; a high wear resistant high density polyethylene plate is provided at such tapered portion to protect it. The container lid has an interior rim which fits within the side and end walls, the lid comprising a double surface wall which is closed at its edges and which has cross-ribs extending between the surfaces. The lid is welded to the end and side walls of the container, and has an enlarged aperture therein, an inlet feed member being received into the aperture and having a filling opening with a filling plug closing this opening. The size of the aperture is such that there is access to the interior of the container for cleaning purposes.
Description
2 ~
This invention relates to plastic containers.
According to one aspect of the invention there is provided a plastics container comprising a base wall, a pair of side walls and a pair of end walls, wherein the walls oE at least one of the said pairs of walls comprise a pair of parallel surfaces connected together and re-in-forced by cross pieces. The container is preferably an injection moulding and the cross-pieces extend in the direction of mould movement. Thus a wall is provided which is reinforced by projections but is unencumbered by re-inforcing on both on its interior and exterior surfac-es which are preferably entirely smooth. Preferably at least one of the remaining walls is reinforced but does not comprise parallel surfaces, this said wall preferably being the base wall. Preferably the side and end walls comprise parallel surfaces joined together by cross-piec-es as aforedescribed. Insulation material may be inser-ted between the surfaces of the multi-surface walls.
One of the pairs of side and end walls preferably extends below the base wall to leave a gap below the base wall, into which gap the forks of a fork lift truck can be inserted to permit the container to be carried there-by. The walls of the other pair of walls preFerably taper at the entrance to the gap to provide a lead-in surface for the ~orks. A high wear resistant high density 2 ~ 3 ~3 ~
~olyethylene plate is pre~erably provided at such tapered portion to protect it. The extensions ~nay conveniently be formed separately and inser~e(1 between the surfaces.
The container is conveniently provided with a lid.
This lid preferably has an interior rim which fits within the side and end w~l]~. The inner surface of the rim is preferably ra(liussed to provide a rounded corner for ease of cleaning. The lid is oreEerably a double surface wall which is closed at its edges and which has cross-ribs ex-tending between the surfaces. These surfaces are prefer-ably separately formed by injection moulding and then by heating the ends oE tlle cross-ribs and edges softening these an,3 Eorcing the surfaces together so that the ribs seal. The lid is pre~erably welded to the end and side walls of the container.
The lid conveniently has an enlarged opening there-in. An inlet feed member is preferably received into the opening preferably by being screw threaded therein. The feed melnher preferably has a filling opening with a fill-ing plug closing this opening. A vent valve may also be provided in the feed member. The size of the opening is preferably such that there is access to the interior of the contairler ~or cleaning purposes.
P54326/S74~V38 Page 3 2 ~ ~ 2 ~
At the upper side of its corners, the lid may be provided with frusto-conical projestions to provide loca-ting means for a second container placed thereon. The pf(~jections are preferably internally cored to receive an eye which may be engaged by a hook for lifting purposes.
Below the projections, the lid may have locating means that engage in recesses in the walls.
The base of the container is preferably provided with an outlet opening which is ureferably located near to one of the other walls and the base wall pre~erably slopes towards the outer opening. Within the opening there may be received the inlet member of an angled elhow connection to permit liquid contents of the container to be delivere(1 outside the envelope of the container.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings.
In the~ drawings:-Figure 1 is an outside view of a container of the inven-tion, Figure 2 is a transverse section through the container, Figure 3 is a detail section through the feet of the con-tainer, and Figure 4 is a detail section on line 4 - 4 of Figure 1.
2 ~
Referring now to the drawings, there is shown a container 10 of the invention. The contailler is formed as a plastics injection moulding. The container 10 which is parallelipipedal in shape comprises a body 12 and a lid (described below). The body 12 comprises a base wall 16, a pair of opposite side walls 18 and a pair of opposite end walls 20.
The side and end walls 18 and 20 are each comprised by a l~a ir oE spaced parallel surface members 22 and 24 which are connected together by cross-pieces 26 and which are open at the ir lower ends. The cross-pieces 26 extend vertically from the base wall 16, i.e. in the direction of mould movement during the moulding of the container.
Thus the side and end walls are of double wall construc-~ion reinforced by the cross-pieces 26. Furthermore the interior and exterior surfaces of each of the double walls is smooth. The base wall 16 is also re-inforced by projection walls 16a arranged in a mesh-like formation as is known in the art.
At their junctions, the side and end walls and the base walls are heavily radiused for ease of cleaning.
The b,lse wall 16 has an outlet opening 28 which is located near to one side 18 about midway between the end walls 20. The base wall 16 slopes towards this outlel opening 28. A plug 29 normally closés this opening 28.
~ ~ ~, = s ~ ~ 3 An angled elbow connection 30 (shown in chain lines) may be inserted i~lt~ the opening 28 for delivering the contents of the container is provided. The connection 30 has a vertical inlet member 31 that is received within the outlet opening 28, a long delivery arm 32 including a closure cock 34, and a delivery spout 36. The connect-ion 30 can thus permit liquid contents of the container to be delivered outside the envelope of the container.
(Although the connection 30 is shown projecting inwardly of the container, it can be, and usually is arranged projecting outwardly.) At their lower ends, the end walls 20 receive rigid feet 38 on which the container rests to leave a gap 40 below the base wall 16. Each foot 38 comprises an ups-tanding ley 4~ tllat Eits between the lower portion of the surface members 22 and 24 and has at locations along its length a pair of projectionslwhich fit into correspondillg openings in the outer surEace members 22. Thus each foot 38 is firmly held in position. Each foot 38 also has a pair of openings 44 to receive the forks of a fork-lift truck under certain circumstances which will be discussed below.
At the entrance -to the yap 40, the projection walls 16a on the base wall 16 are of decreasing length.
There is thus formed a lead-in portion 46, which is up to 50% larger than the remainder of the gap 40, to serve to facilitate and guide the entry of the Eorks into the gap 40. A high-wear-resistant polyurethane plate 48 is 2 ~
provided at such lead-in portion to protect it. The plate 48 has projections on its upper sutr~ce that fit firmly in between the projection walls of the base wall thereby holding the plate 48 Eirmly in position.
The upper end of the container 10 is closed by a lid 50 which is welded to the end and side walls of the container. The lid 50 has a pair of surface walls 52 and 54 whicll are closed at their edges 54 and which have cross-ribs 58 extending therebetween. These surfaces 52 and 54 are separately formed by injection moulding each to have have portions of the cross-ribs 58 integral with it. After the surfaces 52 and 54 are thus formed, the ends of the cross-ribs 58 and the edges 60 are heated to soften them. The surfaces 52 and 54 are then forced together so that the ends of the ribs 58 and edges 54 seal with one another to form an integral unit.
On its underside, the li-1 ;0 has a peripheral rec-ess 64 so that the lid body fits closely within the side and end walls 18 and 20. The inner surface 66 of the rim 64 is heavily radiused to provide a rounded corner for ease of cleaning.
The lid 50 has an enlarged aperture 68 therein.
The size of the opening is preferably such that there is access to the interior of the con~ainer for cleaning pur-poses. A closure member 70 is threadedly received into P54326/S74/V3~ 2 ~ 7 the aperture 68. The inlet member 70 incorporates a filling opening 72 with a filling plug 74 threadedly re-ceived tllerein t(-l close this opening 72. A vent valve 76 is also provided in the closure member 70.
At the upper si3e oE its corners, the lid 50 has low wide Erusto-conical projections 78. A bore (not shown) is formed in each such projection 78 to receive a lifting eye 80 which may be enyaged by a hook for lifting purpos-es. Below the projections 78, the lid 50 has a recess which engages on a projection at junctions between the side and end walls for additional locating of the lid on the container.
The container can be easily lifted by a fork-lift truck with the forks passing through the openings in the feet. If it is desired to tip the container for any purpose, the forks can be passed through the openings 44 in the feet 38 so that there is a firm connection there-between.
The container 10 as above described may be of any convenient size which may range from two hundred litres to fifteen hundred litres. Because of the double surface - construction, the side and end walls will be rigid and will not bulge when the container is ~il]ed with liquid.
Furthermore, a degree of insulation is achieved with the air gap and may be supplemented by inserting between the 2~2~3~
walls ~oam or other insulating material (indicated at 82 in Figure 4). Because of its cuboidal form, the container provides a v(?~y efficient containment for liquids.
The invention is not limited to the precise cons-tructional details hereinbefore described and illustrated in the drawings.
It is to be noted that in this specification the~
term "parallel" is used in to include in its meaning "near parallel" as~ man~ parts have a small taper (normally of the order of 4) to facilitate demoulding.
This invention relates to plastic containers.
According to one aspect of the invention there is provided a plastics container comprising a base wall, a pair of side walls and a pair of end walls, wherein the walls oE at least one of the said pairs of walls comprise a pair of parallel surfaces connected together and re-in-forced by cross pieces. The container is preferably an injection moulding and the cross-pieces extend in the direction of mould movement. Thus a wall is provided which is reinforced by projections but is unencumbered by re-inforcing on both on its interior and exterior surfac-es which are preferably entirely smooth. Preferably at least one of the remaining walls is reinforced but does not comprise parallel surfaces, this said wall preferably being the base wall. Preferably the side and end walls comprise parallel surfaces joined together by cross-piec-es as aforedescribed. Insulation material may be inser-ted between the surfaces of the multi-surface walls.
One of the pairs of side and end walls preferably extends below the base wall to leave a gap below the base wall, into which gap the forks of a fork lift truck can be inserted to permit the container to be carried there-by. The walls of the other pair of walls preFerably taper at the entrance to the gap to provide a lead-in surface for the ~orks. A high wear resistant high density 2 ~ 3 ~3 ~
~olyethylene plate is pre~erably provided at such tapered portion to protect it. The extensions ~nay conveniently be formed separately and inser~e(1 between the surfaces.
The container is conveniently provided with a lid.
This lid preferably has an interior rim which fits within the side and end w~l]~. The inner surface of the rim is preferably ra(liussed to provide a rounded corner for ease of cleaning. The lid is oreEerably a double surface wall which is closed at its edges and which has cross-ribs ex-tending between the surfaces. These surfaces are prefer-ably separately formed by injection moulding and then by heating the ends oE tlle cross-ribs and edges softening these an,3 Eorcing the surfaces together so that the ribs seal. The lid is pre~erably welded to the end and side walls of the container.
The lid conveniently has an enlarged opening there-in. An inlet feed member is preferably received into the opening preferably by being screw threaded therein. The feed melnher preferably has a filling opening with a fill-ing plug closing this opening. A vent valve may also be provided in the feed member. The size of the opening is preferably such that there is access to the interior of the contairler ~or cleaning purposes.
P54326/S74~V38 Page 3 2 ~ ~ 2 ~
At the upper side of its corners, the lid may be provided with frusto-conical projestions to provide loca-ting means for a second container placed thereon. The pf(~jections are preferably internally cored to receive an eye which may be engaged by a hook for lifting purposes.
Below the projections, the lid may have locating means that engage in recesses in the walls.
The base of the container is preferably provided with an outlet opening which is ureferably located near to one of the other walls and the base wall pre~erably slopes towards the outer opening. Within the opening there may be received the inlet member of an angled elhow connection to permit liquid contents of the container to be delivere(1 outside the envelope of the container.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings.
In the~ drawings:-Figure 1 is an outside view of a container of the inven-tion, Figure 2 is a transverse section through the container, Figure 3 is a detail section through the feet of the con-tainer, and Figure 4 is a detail section on line 4 - 4 of Figure 1.
2 ~
Referring now to the drawings, there is shown a container 10 of the invention. The contailler is formed as a plastics injection moulding. The container 10 which is parallelipipedal in shape comprises a body 12 and a lid (described below). The body 12 comprises a base wall 16, a pair of opposite side walls 18 and a pair of opposite end walls 20.
The side and end walls 18 and 20 are each comprised by a l~a ir oE spaced parallel surface members 22 and 24 which are connected together by cross-pieces 26 and which are open at the ir lower ends. The cross-pieces 26 extend vertically from the base wall 16, i.e. in the direction of mould movement during the moulding of the container.
Thus the side and end walls are of double wall construc-~ion reinforced by the cross-pieces 26. Furthermore the interior and exterior surfaces of each of the double walls is smooth. The base wall 16 is also re-inforced by projection walls 16a arranged in a mesh-like formation as is known in the art.
At their junctions, the side and end walls and the base walls are heavily radiused for ease of cleaning.
The b,lse wall 16 has an outlet opening 28 which is located near to one side 18 about midway between the end walls 20. The base wall 16 slopes towards this outlel opening 28. A plug 29 normally closés this opening 28.
~ ~ ~, = s ~ ~ 3 An angled elbow connection 30 (shown in chain lines) may be inserted i~lt~ the opening 28 for delivering the contents of the container is provided. The connection 30 has a vertical inlet member 31 that is received within the outlet opening 28, a long delivery arm 32 including a closure cock 34, and a delivery spout 36. The connect-ion 30 can thus permit liquid contents of the container to be delivered outside the envelope of the container.
(Although the connection 30 is shown projecting inwardly of the container, it can be, and usually is arranged projecting outwardly.) At their lower ends, the end walls 20 receive rigid feet 38 on which the container rests to leave a gap 40 below the base wall 16. Each foot 38 comprises an ups-tanding ley 4~ tllat Eits between the lower portion of the surface members 22 and 24 and has at locations along its length a pair of projectionslwhich fit into correspondillg openings in the outer surEace members 22. Thus each foot 38 is firmly held in position. Each foot 38 also has a pair of openings 44 to receive the forks of a fork-lift truck under certain circumstances which will be discussed below.
At the entrance -to the yap 40, the projection walls 16a on the base wall 16 are of decreasing length.
There is thus formed a lead-in portion 46, which is up to 50% larger than the remainder of the gap 40, to serve to facilitate and guide the entry of the Eorks into the gap 40. A high-wear-resistant polyurethane plate 48 is 2 ~
provided at such lead-in portion to protect it. The plate 48 has projections on its upper sutr~ce that fit firmly in between the projection walls of the base wall thereby holding the plate 48 Eirmly in position.
The upper end of the container 10 is closed by a lid 50 which is welded to the end and side walls of the container. The lid 50 has a pair of surface walls 52 and 54 whicll are closed at their edges 54 and which have cross-ribs 58 extending therebetween. These surfaces 52 and 54 are separately formed by injection moulding each to have have portions of the cross-ribs 58 integral with it. After the surfaces 52 and 54 are thus formed, the ends of the cross-ribs 58 and the edges 60 are heated to soften them. The surfaces 52 and 54 are then forced together so that the ends of the ribs 58 and edges 54 seal with one another to form an integral unit.
On its underside, the li-1 ;0 has a peripheral rec-ess 64 so that the lid body fits closely within the side and end walls 18 and 20. The inner surface 66 of the rim 64 is heavily radiused to provide a rounded corner for ease of cleaning.
The lid 50 has an enlarged aperture 68 therein.
The size of the opening is preferably such that there is access to the interior of the con~ainer for cleaning pur-poses. A closure member 70 is threadedly received into P54326/S74/V3~ 2 ~ 7 the aperture 68. The inlet member 70 incorporates a filling opening 72 with a filling plug 74 threadedly re-ceived tllerein t(-l close this opening 72. A vent valve 76 is also provided in the closure member 70.
At the upper si3e oE its corners, the lid 50 has low wide Erusto-conical projections 78. A bore (not shown) is formed in each such projection 78 to receive a lifting eye 80 which may be enyaged by a hook for lifting purpos-es. Below the projections 78, the lid 50 has a recess which engages on a projection at junctions between the side and end walls for additional locating of the lid on the container.
The container can be easily lifted by a fork-lift truck with the forks passing through the openings in the feet. If it is desired to tip the container for any purpose, the forks can be passed through the openings 44 in the feet 38 so that there is a firm connection there-between.
The container 10 as above described may be of any convenient size which may range from two hundred litres to fifteen hundred litres. Because of the double surface - construction, the side and end walls will be rigid and will not bulge when the container is ~il]ed with liquid.
Furthermore, a degree of insulation is achieved with the air gap and may be supplemented by inserting between the 2~2~3~
walls ~oam or other insulating material (indicated at 82 in Figure 4). Because of its cuboidal form, the container provides a v(?~y efficient containment for liquids.
The invention is not limited to the precise cons-tructional details hereinbefore described and illustrated in the drawings.
It is to be noted that in this specification the~
term "parallel" is used in to include in its meaning "near parallel" as~ man~ parts have a small taper (normally of the order of 4) to facilitate demoulding.
Claims (30)
1. A plastics container comprising a base wall, a pair of side walls and a pair of end walls, wherein the walls of at least one of the said pairs of walls comprise a pair of parallel surfaces connected together and re-inforced by cross pieces.
2. A container as claimed in claim 1 formed as an injection moulding, wherein the cross-pieces extend in the direction of mould movement.
3. A container as claimed in claim 1 wherein each reinforced walls are unencumbered by re-inforcing on both on its interior and exterior surfaces.
4. A container as claimed in claim 3 wherein the inter-ior and exterior surfaces of the wall are preferably entirely smooth.
5. A container as claimed in claim 1 wherein at least one of the remaining walls is reinforced but does not comprise parallel surfaces.
6. A container as claimed in claim 5 wherein the said wall is the base wall of the container.
7. A container as claimed in claim 1 wherein all the side and end walls comprise parallel surfaces joined together by cross-pieces.
8. A container as claimed in claim 7 wherein insulation material is inserted between the surfaces of the multi-surface walls.
9. A container as claimed in claim 1 wherein one of the pairs of side and end walls has extensions extending below the base wall to provide a support for the container in such a way as to leave a gap below the base wall, into which gap the forks of a fork lift truck can be inserted to permit the container to be carried thereby.
10. A container as claimed in claim 9 wherein the walls of the other pair of walls taper at the entrance to the gap to provide a lead-in surface for the forks.
11. A container as claimed in claim 10 wherein a high wear resistant high density polyethylene plate is provided at such tapered portion to protect it.
12. A container as claimed in claim 9 wherein the outer wall of the said other pair of walls stop short of the bottom of the base thus allowing an angle plate to be inserted thereby increasing the fork lift entry gap without reducing the internal volume of the container.
13. A container as claimed in claim 1 provided with a lid.
14. A container as claimed in claim 13 wherein the lid has an interior rim which fits within the side and end walls.
15. A container as claimed in claim 14 wherein the inner surface of the rim is radiussed to provide a rounded corner for ease of cleaning.
16. A container as claimed in claim 14 wherein the lid comprises a double surface wall which is closed at its edges and which has cross-ribs extending between the surfaces.
17. A container as claimed in claim 16 wherein said surfaces of the lid are separately formed by injection moulding and then by heating the ends of the cross-ribs and edges to soften these and forcing the surfaces together so that the ribs seal.
18. A container as claimed in claim 17 wherein the ribs are provided on one surface only of the lid and are thus welded directly to the other surface.
19. A container as claimed in claim 18 wherein the lid is welded to the end and side walls of the container.
20. A container as claimed in claim 13 wherein the lid has an enlarged aperture therein.
21. A container as claimed in claim 20 wherein an inlet feed member is received into the aperture, being screw threaded therein.
22. A container as claimed in claim 21 wherein the feed member has a filling opening with a filling plug closing this opening.
23. A container as claimed in claim 21 wherein a vent valve is provided in the feed member.
24. A container as claimed in claim 20 wherein the size of the aperture is such that there is access to the interior of the container for cleaning purposes.
25. A container as claimed in claim 3 wherein the lid is provided at the upper side of its corners with frusto-conical projections to provide locating means for a second container placed thereon.
26. A container as claimed in claim 25 wherein each projections is internally cored to receive an eye which may be engaged by a hook for lifting purposes.
27. A container as claimed in claim 26 wherein below the projections, the lid has locating means that engage on projections on four corners where the walls meet.
28. A container as claimed in claim 1 wherein the base of the container is provided with an outlet opening.
29. A container as claimed in claim 28 wherein the outlet opening is located near to one of the said other walls.
30. A container as claimed in claim 29 wherein the the base wall slopes towards the outlet opening.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPK244290 | 1990-09-24 | ||
| AUPK2442 | 1990-09-24 | ||
| AU63/937/90 | 1990-10-10 | ||
| AU63937/90A AU649231B2 (en) | 1990-10-10 | 1990-10-10 | Containers " Sealing Clerk - phone call from Maria from MA not to seal until further notice" "Case will lapse - refund of sealing fee requested" |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2052088A1 true CA2052088A1 (en) | 1992-03-25 |
Family
ID=25634185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2052088 Abandoned CA2052088A1 (en) | 1990-09-24 | 1991-09-24 | Bulk containers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2052088A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6142550A (en) * | 1998-04-27 | 2000-11-07 | 873968 Ontario Limited | Van liner |
-
1991
- 1991-09-24 CA CA 2052088 patent/CA2052088A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6142550A (en) * | 1998-04-27 | 2000-11-07 | 873968 Ontario Limited | Van liner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |