Claims
- 1. A sealing member adapted for securing to a lip around an opening of a container to close the container, the sealing member comprising:
- (a) a membrane having a periphery and a peripheral portion bounded by the periphery, one side of the membrane including first bonding means for bonding the peripheral portion of the membrane to the lip of the container;
- (b) a sheet having a periphery; and
- (c) second bonding means for bonding facing portions of the membrane and the sheet together to form:
- (i) a lip composite portion for extending over portions of the container lip; and
- (ii) a central composite portion for extending over portions of the container opening, and leaving at least one portion of the sheet free to form a tab wherein the sheet and the membrane have common peripheral parts in the lip composite portion, wherein the tab is separated from the lip and central composite portions by a boundary, and
- with all of the periphery of the sheet overlapping the peripheral portion of the membrane, and wherein the sheet and the membrane are bonded together so strongly by the second bonding means that, in use, the sheet and the membrane can be removed as a unit from the lip of the container to open the container.
- 2. A sealing member as claimed in claim 1, wherein the membrane and the sheet have opposite common peripheral parts in the lip composite portion, and wherein the boundary is generally straight and extends between ends of the opposite common peripheral parts of the sheet and the membrane.
- 3. A sealing member as claimed in claim 2, wherein the lip and central composite portions extend from said boundary to the periphery of the sheet and the membrane, with the sheet and the membrane having a common periphery in the composite portion.
- 4. A sealing member as claimed in claim 2, wherein the boundary extends across a major portion of the sealing member.
- 5. A sealing member as claimed in claim 2, wherein the sealing member has a substantially uniform thickness throughout the peripheral portion.
- 6. A sealing member adapted for securing to a lip around an opening of a container to close the container, the sealing member comprising:
- (a) a membrane having a periphery, one side of which includes a membrane peripheral portion, which membrane peripheral portion includes first bonding means for bonding to the lip of the container;
- (b) a sheet having a periphery;
- (c) second bonding means for bonding facing portions of the membrane and the sheet together to form a composite portion, whilst leaving at least one portion of the sheet free to form a tab and overlapping the membrane peripheral portion with the tab and the membrane having a substantially common periphery, the composite portion extending up to a boundary separating the composite portion from the tab, the sheet and the membrane having common peripheral parts opposite one another, the composite portion extending from said boundary to ends of the opposite common peripheral parts of the sheet and the membrane, with the common peripheral parts of the sheet and the membrane being within the composite portion, wherein the second bonding means bonds the sheet and the membrane together so strongly that, in use, the sheet and the membrane can be removed as a unit from the lip of the container to open the container.
- 7. A sealing member as claimed in claim 6, wherein the composite portion extends up to the boundary, which extends across a major portion of the membrane.
- 8. A sealing member as claimed in claim 7, wherein the boundary is straight.
- 9. A sealing member having a peripheral portion adapted for securing to a lip around an opening of a container to close the container, the sealing member comprising:
- (a) a membrane having a periphery, one side of the membrane including first bonding means for bonding to the lip of the container;
- (b) a sheet having a periphery;
- (c) second bonding means for bonding facing portions of the membrane and the sheet together to form a composite portion, whilst leaving at least one portion of the sheet free to form a tab, wherein the second bonding means bonds the sheet and the membrane together so strongly that, in use, the sheet and the membrane can be removed as a unit from the lip of the container to open the container, and wherein both the membrane and the sheet extend into the peripheral portion in both the composite portion and the tab, the composite portion and tab being separated by a boundary which extends between ends of common peripheral parts and the composite portion extends from the boundary to the peripheries of the sheet and the membrane, with the sheet and the membrane having a common periphery within the composite portion.
- 10. A sealing member as claimed in claim 9, wherein, in the composite portion, the sheet and the membrane have common peripheral parts opposite one another.
- 11. A sealing member as claimed in claim 10, wherein the composite portion and tab are separated by the boundary which extends across a major portion of the membrane.
- 12. A sealing member as claimed in claim 11, wherein the boundary is straight.
- 13. A sealing member adapted for securing to a lip around an opening of a container to close the container, the sealing member comprising:
- (a) a membrane having a periphery, one side of the membrane including first bonding means for bonding to the lip of a container;
- (b) a sheet having a periphery;
- (c) second bonding means for bonding facing portions of the membrane and the sheet together to form a composite portion, and leaving at least one portion of the sheet free to form a tab, wherein the second bonding means bonds the sheet and the membrane together so strongly that, in use, the sheet and the membrane can be removed as a unit from the lip of a container to open the container, a boundary being formed between the composite portion and the tab and the composite portion extending from the boundary to the peripheries of the sheet and the membrane, with the sheet and membrane having a common periphery in the composite portion, and wherein, in the tab, the sheet has a periphery at least part of which overlies the periphery of the membrane.
- 14. A sealing member as claimed in claim 13, wherein the second bonding means extends up to the boundary, which extends across a major portion of the membrane.
- 15. A sealing member as claimed in claim 14, wherein the composite portion covers a substantial part of the membrane.
- 16. A sealing member as claimed in claim 15, wherein the sheet and the membrane have common peripheral parts opposite one another.
- 17. A sealing member as claimed in claim 16, wherein the boundary is straight, and the common peripheral parts are continuous with the boundary.
- 18. A sealing member as claimed in claim 17, wherein the sheet and the membrane have an entirely common periphery.
- 19. A sealing member as claimed in claim 1, 2, 6, 8, 9, 12, 13 or 17, wherein the first bonding means of adhesive comprises a hot melt bonding material.
- 20. A sealing member as claimed in claim 19, wherein the membrane is formed from a metal foil, whereby, in use, it can be heated by induction heating, to melt the hot melt bonding material.
- 21. A sealing member adapted for securing to a lip around an opening of a container, the sealing member comprising:
- (a) a membrane having a periphery, one side of the membrane including first bonding means for bonding the membrane to the lip of the container;
- (b) a sheet having a periphery;
- (c) second bonding means between the membrane and the sheet bonding facing portions of the membrane and the sheet together to form a composite portion, and leaving at least one portion of the sheet free to form a tab, a boundary extending between peripheries of the sheet and membrane at each end of the boundary, the sheet and membrane having common peripheries at least at the ends of the boundary and in the composite portion, and the tab having a periphery at least part of which overlies the periphery of the membrane, wherein the sheet and the membrane are bonded together so strongly by the second bonding means that, in use, the sheet and the membrane can be removed as a unit from the lip of the container to open the container.
- 22. A sealing member as claimed in claim 21, wherein the boundary extends across a major portion of the membrane.
- 23. A sealing member as claimed in claim 1 or 2, in combination with a container including a planar lip, the sealing member being secured to the lip around an opening of the container, to close the container, wherein the whole of the sealing member is generally planar.
- 24. A sealing member as claimed in claim 6 or 21, in combination with a container including a planar lip, wherein the membrane is bonded by the first bonding means to the lip of the container and wherein the sealing member is generally planar.
- 25. A sealing member as claimed in claim 1, wherein the lip composite portion is arcuate, has an arcuate periphery and extends around the central composite portion and between ends of the boundary.
- 26. A sealing member as claimed in claim 1, wherein the lip composite portion is curvilinear, has a curvilinear periphery and extends around the central composite portion and between ends of the boundary.
- 27. A sealing member as claimed in claim 9, wherein the sealing member generally has a uniform thickness throughout the peripheral portion.
- 28. A sealing member as claimed in claim 13, in combination with a container wherein the whole of the sealing member is generally planar.
- 29. A sealing member as claimed in claim 21, wherein the boundary is generally straight and extends between the tab and the composite portion.
Priority Claims (1)
Number |
Date |
Country |
Kind |
546450 |
Sep 1987 |
CAX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/530,536 filed on May 30, 1990, now abandoned which is a Continuation of application Ser. No. 07/162,787 filed on Mar. 2, 1988, now U.S. Pat. No. 4,961,986.
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Continuations (2)
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Number |
Date |
Country |
Parent |
530536 |
May 1990 |
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Parent |
162787 |
Mar 1988 |
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