CA1065812A - Containers having fluid-tight sealing means - Google Patents
Containers having fluid-tight sealing meansInfo
- Publication number
- CA1065812A CA1065812A CA319,335A CA319335A CA1065812A CA 1065812 A CA1065812 A CA 1065812A CA 319335 A CA319335 A CA 319335A CA 1065812 A CA1065812 A CA 1065812A
- Authority
- CA
- Canada
- Prior art keywords
- male member
- channel
- container
- base
- groove
- 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
Links
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- Packages (AREA)
Abstract
CANADA
"IMPROVEMENTS IN OR RELATING TO CONTAINERS
HAVING FLUID-TIGHT SEALING MEANS"
ABSTRACT OF THE DISCLOSURE
In a container of the kind having an impermeable base and a flexible cover which is sealed into a groove or slot in the base to form an airtight package, the cover has, around its periphery, an endless male member for engaging in the slot or groove, e.g. an endless inflatable tube, which is resiliently gripped in the slot or groove.
1.
"IMPROVEMENTS IN OR RELATING TO CONTAINERS
HAVING FLUID-TIGHT SEALING MEANS"
ABSTRACT OF THE DISCLOSURE
In a container of the kind having an impermeable base and a flexible cover which is sealed into a groove or slot in the base to form an airtight package, the cover has, around its periphery, an endless male member for engaging in the slot or groove, e.g. an endless inflatable tube, which is resiliently gripped in the slot or groove.
1.
Description
: .
his invention relates to containers having a fluid-tight sealing means for sealing a flexible cover sheet of impermeable material to an impermeable base or other structure formed at least partly rigid or semi-rigid material and which may be evacuated or pressurised to protect goods on said base.
Containers of this type are known, for example, from British Patent No. 1, 191,921 and U.S. Patents Nos. 3,850,214;
3,815,650 and 3,929,178. It is known, see, for example, Specification No. 3,850,214 to effect a seal between a flexible envelope and a base of rigid or semi-rigid material by making use of a flexible inflatable tube along the periphery of the sheet material which tube is inserted into a slot or groove in the rigid or semi-rigid material and then inflated into pressure engagement with the walls of the slot or groove.
Such a sealing means finds particular application for containers where the base is formed of impermeable material and either air is evacuated drom the container so that the ~lexible :.
sheet collapses downwardly onto goods to hold them firmly 20 on the base or in which a gas, for example dry air, is put :
into the envelope. The inElatable tube along the periphery of the sheet can be inserted into a groove or slot extending continuously around the base to ef~ect a fluid-tight seal between the flexible sheet material and the base.
When such a container is used for lon~ term storage, it is possible that there may be loss of fluid pressure in :
the inflated tube~ so that the tube is pulled out or partly pulled out of the slot or groove. This problem can arise . . : . . . ,, . . ,, . . .. , . :, :.~ .. . . . : : . :
` particularly if the container is trans.portahle as. stres.ses may be applied to the cover when the container is moved. For this reason, it has been proposed in the aforementioned Specification No. 3,850,214 to provide auxiliary securing means comprising a flap on the cover sheet which is mechanically secured by eyelets engaging hoods on the base of the container. .
Such a construction prevents the tube being pulled out of the groove or slot but does not necessarily ensure that the seal between the cover sheet and the base remains airtight if pressure is lost in the inflated tube.
It is an object of the present invention to provide an improved means for sealing the cover of the container to the base in which the use of two separate securing means is obviated.
According to this invention, a container comprises a flexible cover sheet of i~permeable material and an impermeable base, the base having a load-carrying surface with an endless channel extending around at least a major part of that surface, said channel comprising two spaced upright walls on the base, and the cover sheet having, around its periphery, an endless male member for inserting into said channel, said male member being formed at least partly of elastomeric material and being wedge-shaped in section to be a force fit into said channel between said upright walls so as to orm an airtight seal between the cover sheet and the base and wherein valve means are provided to . . .
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permit 'he in~e:^ior c~ ihe container to be pressurised or evacuated of air.
With this construction, the male member is forced into the endless groove or slot and is resiliently retained therein by the resilience of the elastomeric material of that member and/or by the resilience of the lining if a lining is provided in the slot or groove.
The male member may be a solid member which is a force fit in the slot or groove. In this case, preferably said endless male member is formed of elastomeric material shaped with ridges or projections on at least one of the surfaces facing a wall of the slot or groove. Preferably also with such a construction, the walls of said slot or groove are lined with a resilient material which is softer than the material of the male member.
In one form of construction, the male member has ri.bs or projections extending longitudinally along one or both o~ its side faces. Such ribs or projections might be formed as rounded beads or pointed or cusp-shaped projections. In one convenient form of construction the projections are wedge-shaped projections, the wedge shapes being such as to facilitate entry of the male member into the groove but having shoulders which resist withdrawal of the male member Erom the groove engaging into the soEt lining of the groove.
Preferably the male member is shaped to have a rib or ribs or other projection which extends outwardly from the outer wall of the envelope beyond the outer edge of the outer wall of the groove when the male member i.s inserted in the 4. ~:
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', groove. Such a rlb~ o~her projection facilitates manual gripping of the maie member to force it into the groove when sealing -the container and to remove it therefrom when unsealing the container.
The male member conveniently is formed of a relatively hard plastics material. This member may be formed integrally with the cover or may be secured thereto, e.g. by welding or by an adhesive or it may be separate ~rom the cover; in the last-mentioned case, the peripheral portion of the cover is 10 put into the groove and the male member then forced into the groove to wedge the cover therein.
The aforementioned lining of the groove is preferably of a soft resilient material for example rubber, which is softer than the male member. This lining material may have 15 outwardly-turned portions or enlarged ends extending over the tops of the side walls of the groove.
The invention further includes within its scope a container comprising an impermeable base and a flexible impermeable cover, the base having a load-carrying surface 20 with a continuous groove extending around that surface or at least the major part thereof, said groove comprising two spaced upright wall members sealed to or :lntegral with the base and -the cover having around its periphery or attached to its periphery an endless male member ~or :lnsertiny :lnto sa:ld 25 yroove, which maIe member is Eormed oE elastomeric material and shaped to be a force fit into said groove between said upright walls or between linings on said walls, -to seal -the cover to the base~ valve means being provided in the base or cover to permit the interior of the container to be pressurised :
or evacuated of air. Preferably the walls of the groove, on their inwardly-facing surfaces, are lined with a resilient material which is softer than the material of said male member.
The aforementioned base is conveniently formed of metal but may be made of other materials. Preferably it is formed as a pall~t. Such a pallet may be shaped in the known way for ad~ission of the forks of a fork lift truck underneath the impermeable base to enable the container to be liEted.
~The groove may be formed around the peripheral edge of the pallet or may be spaced, over the whole or part of its length, inwardly from the periphery of the base. This latter arrangement facilitates for example the fitting of posts on the base for the supporting of one pallet on top of another.
The following is a description of a number of embodiments of the invention, reference being made to the accompanying drawings in which:-Figure 1 is a diagram showing, in elevation,a container of the type to which the present invention can be applied;
Figure 2 is an exploded perspective view of part of a base and cover (in section) for forming one construc-tion of container;
F:lgure 3 is a view similar to Figure 2 of another embodiment of the invention;
his invention relates to containers having a fluid-tight sealing means for sealing a flexible cover sheet of impermeable material to an impermeable base or other structure formed at least partly rigid or semi-rigid material and which may be evacuated or pressurised to protect goods on said base.
Containers of this type are known, for example, from British Patent No. 1, 191,921 and U.S. Patents Nos. 3,850,214;
3,815,650 and 3,929,178. It is known, see, for example, Specification No. 3,850,214 to effect a seal between a flexible envelope and a base of rigid or semi-rigid material by making use of a flexible inflatable tube along the periphery of the sheet material which tube is inserted into a slot or groove in the rigid or semi-rigid material and then inflated into pressure engagement with the walls of the slot or groove.
Such a sealing means finds particular application for containers where the base is formed of impermeable material and either air is evacuated drom the container so that the ~lexible :.
sheet collapses downwardly onto goods to hold them firmly 20 on the base or in which a gas, for example dry air, is put :
into the envelope. The inElatable tube along the periphery of the sheet can be inserted into a groove or slot extending continuously around the base to ef~ect a fluid-tight seal between the flexible sheet material and the base.
When such a container is used for lon~ term storage, it is possible that there may be loss of fluid pressure in :
the inflated tube~ so that the tube is pulled out or partly pulled out of the slot or groove. This problem can arise . . : . . . ,, . . ,, . . .. , . :, :.~ .. . . . : : . :
` particularly if the container is trans.portahle as. stres.ses may be applied to the cover when the container is moved. For this reason, it has been proposed in the aforementioned Specification No. 3,850,214 to provide auxiliary securing means comprising a flap on the cover sheet which is mechanically secured by eyelets engaging hoods on the base of the container. .
Such a construction prevents the tube being pulled out of the groove or slot but does not necessarily ensure that the seal between the cover sheet and the base remains airtight if pressure is lost in the inflated tube.
It is an object of the present invention to provide an improved means for sealing the cover of the container to the base in which the use of two separate securing means is obviated.
According to this invention, a container comprises a flexible cover sheet of i~permeable material and an impermeable base, the base having a load-carrying surface with an endless channel extending around at least a major part of that surface, said channel comprising two spaced upright walls on the base, and the cover sheet having, around its periphery, an endless male member for inserting into said channel, said male member being formed at least partly of elastomeric material and being wedge-shaped in section to be a force fit into said channel between said upright walls so as to orm an airtight seal between the cover sheet and the base and wherein valve means are provided to . . .
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permit 'he in~e:^ior c~ ihe container to be pressurised or evacuated of air.
With this construction, the male member is forced into the endless groove or slot and is resiliently retained therein by the resilience of the elastomeric material of that member and/or by the resilience of the lining if a lining is provided in the slot or groove.
The male member may be a solid member which is a force fit in the slot or groove. In this case, preferably said endless male member is formed of elastomeric material shaped with ridges or projections on at least one of the surfaces facing a wall of the slot or groove. Preferably also with such a construction, the walls of said slot or groove are lined with a resilient material which is softer than the material of the male member.
In one form of construction, the male member has ri.bs or projections extending longitudinally along one or both o~ its side faces. Such ribs or projections might be formed as rounded beads or pointed or cusp-shaped projections. In one convenient form of construction the projections are wedge-shaped projections, the wedge shapes being such as to facilitate entry of the male member into the groove but having shoulders which resist withdrawal of the male member Erom the groove engaging into the soEt lining of the groove.
Preferably the male member is shaped to have a rib or ribs or other projection which extends outwardly from the outer wall of the envelope beyond the outer edge of the outer wall of the groove when the male member i.s inserted in the 4. ~:
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.
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', groove. Such a rlb~ o~her projection facilitates manual gripping of the maie member to force it into the groove when sealing -the container and to remove it therefrom when unsealing the container.
The male member conveniently is formed of a relatively hard plastics material. This member may be formed integrally with the cover or may be secured thereto, e.g. by welding or by an adhesive or it may be separate ~rom the cover; in the last-mentioned case, the peripheral portion of the cover is 10 put into the groove and the male member then forced into the groove to wedge the cover therein.
The aforementioned lining of the groove is preferably of a soft resilient material for example rubber, which is softer than the male member. This lining material may have 15 outwardly-turned portions or enlarged ends extending over the tops of the side walls of the groove.
The invention further includes within its scope a container comprising an impermeable base and a flexible impermeable cover, the base having a load-carrying surface 20 with a continuous groove extending around that surface or at least the major part thereof, said groove comprising two spaced upright wall members sealed to or :lntegral with the base and -the cover having around its periphery or attached to its periphery an endless male member ~or :lnsertiny :lnto sa:ld 25 yroove, which maIe member is Eormed oE elastomeric material and shaped to be a force fit into said groove between said upright walls or between linings on said walls, -to seal -the cover to the base~ valve means being provided in the base or cover to permit the interior of the container to be pressurised :
or evacuated of air. Preferably the walls of the groove, on their inwardly-facing surfaces, are lined with a resilient material which is softer than the material of said male member.
The aforementioned base is conveniently formed of metal but may be made of other materials. Preferably it is formed as a pall~t. Such a pallet may be shaped in the known way for ad~ission of the forks of a fork lift truck underneath the impermeable base to enable the container to be liEted.
~The groove may be formed around the peripheral edge of the pallet or may be spaced, over the whole or part of its length, inwardly from the periphery of the base. This latter arrangement facilitates for example the fitting of posts on the base for the supporting of one pallet on top of another.
The following is a description of a number of embodiments of the invention, reference being made to the accompanying drawings in which:-Figure 1 is a diagram showing, in elevation,a container of the type to which the present invention can be applied;
Figure 2 is an exploded perspective view of part of a base and cover (in section) for forming one construc-tion of container;
F:lgure 3 is a view similar to Figure 2 of another embodiment of the invention;
2.5 Figures 4 and 5 illustrate further forms of ribs on the male member; and Figure 6 illustrates the provision of ribs on a lining of a groove in another construction.
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Re~erring to Figure 1, there is shown diagrammatically a container for goods comprising a rigid impermeable base 1 constructed as a pallet with openings 2 for the forks of a fork-lift truck. Near the periphery of the base is an upstanding member 3 forming an endless groove ~not shown) in which is secured the periphery of a flexible impermeable cover sheet 5, which is typically formed of butyl rubber. Valve means 6 are provided in the base 1, or alternatively in the cover 5 enabling air to be partially evacuated from within 10 the container so that the cover sheet is drawn down onto goods 7 within the container. Only a small reduction in air pressure is necessary to ensure that the cover is pressed, by the outside atmospheric pressure, into tight engagement with goods on -the base. The goods are thus firmly held on the 15 base. The valve means may alternatively or additionally be arranged for pressuring the container, e.g. with dry air or with an inert gas as may be desired in some cases for storing yoods.
The present invention is concerned more particularly 20 with the manner of sealing the cover 5 to the base 1 and Figure 2 illustrates one constructlon for this sealing means.
Referring to Figure 2, there is shown part of a metal tray havlng an i~permeable base 50 with two upright walls 51, 52 which define an endless groove 53 around the periphery of 25 the base. The tray is conveniently constructed as a pallet, for exc~mple, with transverse members on its underwide to enable the forks of a fork-lift truck to be inserted under the base 50 when the tray is resting on the ground. In the embodiment of ~ .
7.
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Figure 2, the groove is lined on both sides with soft rubber 54, this soft rubber extending over the top edges of the walls 51, 52 as shown at 55.
For storing goods on the tray, a flexible cover, part of which is shown at 56, which is formed of impermeable material is put over the goods and an endless male member 57, secured on the peri~hery of the cover and extending around the periphery thereof is forced into the groove 53 between the linings 54. The male member 57, in cross-section is tapered so -that the thickness decreases towards its lower edge. In the embodiment illustrated, one face is formed -with a series of wedge-shaped ribs 58 extending along the length of the male member, each rib having an upper shoulder 59 which engages in the soft rubber lining 54 to ensure that the male member 57 is held firmly in the groove. This male member 57 is formed o a resilient plastics material, preferably a harder material than the lining 54 and has an integral outwardly directed flange 60 which, when the member 57 is forced into the groove 53, extends outwardly over the top of the lining material 55 above the top of the outer wall 51. The flange 60 facilitates manual forcing of the male member into the groove when the container is to be sealed and withdrawal therefrom when the container is to be unsealed. The lower end of the male member engages the soft lining material at the bottom of the groove 53, the flange 60 engages the top of the lining and the side faces of the male member engage the inwardly-facing surfaces of the lining to give an airtight seal.
. .
.
, When the male member 57 has been inserted into the groove 53, air is partially evacuated from the region within the cover 55 through a valve (not shown) in the cover or, preferably, in the base. The vacuum holds the cover down onto any goods on ~he base so securing such goods firmly, as may be necessary for transport purposes.
Figure 3 shows another construction in which the endless groove, shown at 61, is formed of a metal or ceramic member 62 with a smooth ~inish and secured around the periphery 10' of a pallet 63. The male member, shown at 64 with longitudinal~y-extending ribs 65 and an outwardly-directed flange 66, is forced into the groove 60 to be gripped by compression o~ the resilient material. A cover of ~lexible impermeable material 68 is welded or otherwise secured to the male member 64 to form, with the pallet 63, a container which can be partially evacuated as described above.
Figures 4 and 5 illustrate at 75 and 76 respectively, alternative rib shapes for use on the male member. As shown at 77 in Figure 6, the lining 78 of a groove may also be provided with longitudinally-ex-tending ribs. Other rib shapes may be used on the lining, for example ribs of the shape shown in Figures 4 and 5.
.
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Re~erring to Figure 1, there is shown diagrammatically a container for goods comprising a rigid impermeable base 1 constructed as a pallet with openings 2 for the forks of a fork-lift truck. Near the periphery of the base is an upstanding member 3 forming an endless groove ~not shown) in which is secured the periphery of a flexible impermeable cover sheet 5, which is typically formed of butyl rubber. Valve means 6 are provided in the base 1, or alternatively in the cover 5 enabling air to be partially evacuated from within 10 the container so that the cover sheet is drawn down onto goods 7 within the container. Only a small reduction in air pressure is necessary to ensure that the cover is pressed, by the outside atmospheric pressure, into tight engagement with goods on -the base. The goods are thus firmly held on the 15 base. The valve means may alternatively or additionally be arranged for pressuring the container, e.g. with dry air or with an inert gas as may be desired in some cases for storing yoods.
The present invention is concerned more particularly 20 with the manner of sealing the cover 5 to the base 1 and Figure 2 illustrates one constructlon for this sealing means.
Referring to Figure 2, there is shown part of a metal tray havlng an i~permeable base 50 with two upright walls 51, 52 which define an endless groove 53 around the periphery of 25 the base. The tray is conveniently constructed as a pallet, for exc~mple, with transverse members on its underwide to enable the forks of a fork-lift truck to be inserted under the base 50 when the tray is resting on the ground. In the embodiment of ~ .
7.
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Figure 2, the groove is lined on both sides with soft rubber 54, this soft rubber extending over the top edges of the walls 51, 52 as shown at 55.
For storing goods on the tray, a flexible cover, part of which is shown at 56, which is formed of impermeable material is put over the goods and an endless male member 57, secured on the peri~hery of the cover and extending around the periphery thereof is forced into the groove 53 between the linings 54. The male member 57, in cross-section is tapered so -that the thickness decreases towards its lower edge. In the embodiment illustrated, one face is formed -with a series of wedge-shaped ribs 58 extending along the length of the male member, each rib having an upper shoulder 59 which engages in the soft rubber lining 54 to ensure that the male member 57 is held firmly in the groove. This male member 57 is formed o a resilient plastics material, preferably a harder material than the lining 54 and has an integral outwardly directed flange 60 which, when the member 57 is forced into the groove 53, extends outwardly over the top of the lining material 55 above the top of the outer wall 51. The flange 60 facilitates manual forcing of the male member into the groove when the container is to be sealed and withdrawal therefrom when the container is to be unsealed. The lower end of the male member engages the soft lining material at the bottom of the groove 53, the flange 60 engages the top of the lining and the side faces of the male member engage the inwardly-facing surfaces of the lining to give an airtight seal.
. .
.
, When the male member 57 has been inserted into the groove 53, air is partially evacuated from the region within the cover 55 through a valve (not shown) in the cover or, preferably, in the base. The vacuum holds the cover down onto any goods on ~he base so securing such goods firmly, as may be necessary for transport purposes.
Figure 3 shows another construction in which the endless groove, shown at 61, is formed of a metal or ceramic member 62 with a smooth ~inish and secured around the periphery 10' of a pallet 63. The male member, shown at 64 with longitudinal~y-extending ribs 65 and an outwardly-directed flange 66, is forced into the groove 60 to be gripped by compression o~ the resilient material. A cover of ~lexible impermeable material 68 is welded or otherwise secured to the male member 64 to form, with the pallet 63, a container which can be partially evacuated as described above.
Figures 4 and 5 illustrate at 75 and 76 respectively, alternative rib shapes for use on the male member. As shown at 77 in Figure 6, the lining 78 of a groove may also be provided with longitudinally-ex-tending ribs. Other rib shapes may be used on the lining, for example ribs of the shape shown in Figures 4 and 5.
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Claims (14)
1. A container comprising a flexible cover sheet of impermeable material and an impermeable base, the base having a load-carrying surface with an endless channel extending around at least a major part of that surface, said channel comprising two spaced upright walls on the base, and the cover sheet having, around its periphery, an endless male member for inserting into said channel, said male member being formed at least partly of elastomeric material and being wedge-shaped in section to be a force fit into said channel between said upright walls so as to form an airtight seal between the cover sheet and the base and wherein valve means are provided to permit the, interior of the container to be evacuated of air.
2. A container as claimed in claim 1 wherein the channel is formed with rigid walls having inwardly-extending projections engaging the male member.
3. A container as claimed in claim 1 wherein the walls of said channel are lined with a resilient material which is softer than the material of the male member.
10.
10.
4. A container as claimed in any one of claims 1, 2 or 3 wherein said endless male member is formed of elastomeric material shaped with ridges or projections on at least one of the surfaces facing a wall of the channel.
5. A container as claimed in any one of claims 1, 2 or 3 wherein said male member is shaped and dimensioned to be a force fit into said channel.
6. A container comprising an impermeable base and a flexible impermeable cover, the base having a load-carrying surface with a continuous channel extending around at least the major part of that surface, said channel comprising two spaced upright wall members sealed to or integral with the base and the cover having around its periphery or attached to its periphery an endless male member for inserting into said channel, which male member is formed of elastomeric material and is wedge-shaped in section to be a force fit into said channel to seal the cover to the base, valve means being provided to permit the interior of the container to be evacuated of air.
7. A container as claimed in claim 6 wherein the male member has ribs or projections extending longitudinally along one or both of its side faces.
11.
11.
8. A container as claimed in claim 7, wherein the channel is lined with an elastomer softer than the material of said male member and wherein the projections on the male member are wedge-shaped projections, the wedge shapes being such as to facilitate entry of the male member into the channel but having shoulders which resist withdrawal of the male member from the channel by engaging into the soft lining of the channel.
9. A container as claimed in any one of claims 1, 6 or 8 wherein the male member is shaped to have an integral flange which extends outwardly from the outer wall of the envelope beyond the outer edge of the outer wall of the channel when the male member is inserted in the channel.
10. A container comprising a flexible cover sheet of impermeable material and an impermeable base, the base having a load-carring surface with an endless channel extending around at least a major part of that surface, said channel comprising two spaced upright wall members on the base, and the cover sheet having, around its peri-phery, an endless male member for inserting into said channel, said male member being formed at least partly of elastomeric material, said male member furthermore being wedge-shaped in section and dimensioned to be a force fit 12.
into said channel so as to form an airtight seal between the cover and the base, said male member furthermore having an integral flange extending outwardly over the top of the outer wall member of the channel when the male member is inserted in the channel, and wherein valve means are provided to permit the interior of the container to be evacuated of air.
into said channel so as to form an airtight seal between the cover and the base, said male member furthermore having an integral flange extending outwardly over the top of the outer wall member of the channel when the male member is inserted in the channel, and wherein valve means are provided to permit the interior of the container to be evacuated of air.
11. A container comprising an impermeable base and a flexible impermeable cover, the base having a load-carrying surface with a continuous groove extending around at least the major part of that surface, said groove comprising two spaced upright wall members on the base and the cover having around its periphery an endless male member for inserting into said groove, which male member is formed of elastomeric material and is wedge-shaped in section to be a force fit into said groove to seal the cover to the base, said male member having an integral flange along its whole length, which flange extends out-wardly over the top of the outer wall of the groove when the male member is inserted in the groove, and valve means being provided to permit the interior of the container to be evacuated of air.
13.
13.
12. A container as claimed in claim 1 or claim 10 or claim 11 wherein the male member has ribs extending longitudinally along at least one of its side faces.
13. A container as claimed in claim 1 or claim 10 or claim 11 wherein said wall members form a V-section channel.
14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA319,335A CA1065812A (en) | 1976-06-02 | 1979-01-09 | Containers having fluid-tight sealing means |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2275876 | 1976-06-02 | ||
| CA267,091A CA1052327A (en) | 1974-05-31 | 1976-12-03 | Containers having fluid-tight sealing means |
| CA319,335A CA1065812A (en) | 1976-06-02 | 1979-01-09 | Containers having fluid-tight sealing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1065812A true CA1065812A (en) | 1979-11-06 |
Family
ID=27164804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA319,335A Expired CA1065812A (en) | 1976-06-02 | 1979-01-09 | Containers having fluid-tight sealing means |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1065812A (en) |
-
1979
- 1979-01-09 CA CA319,335A patent/CA1065812A/en not_active Expired
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