IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0030275
(2005-01-06)
|
등록번호 |
US8057896
(2011-11-01)
|
발명자
/ 주소 |
- Smelko, Joseph
- Thorstensen-Woll, Robert William
|
출원인 / 주소 |
- Selig Sealing Products, Inc.
|
대리인 / 주소 |
Fitch, Even, Tabin & Flannery
|
인용정보 |
피인용 횟수 :
23 인용 특허 :
68 |
초록
▼
A seal and method of manufacture is provided for sealing containers such as bottles, jars and the like. The seal (i.e., closure) is formed with a lower sheet-like structure having a non-foam, heat-distributing layer thereon. The lower structure includes a foil support layer and has a polymer layer,
A seal and method of manufacture is provided for sealing containers such as bottles, jars and the like. The seal (i.e., closure) is formed with a lower sheet-like structure having a non-foam, heat-distributing layer thereon. The lower structure includes a foil support layer and has a polymer layer, such as a PET layer disposed on its bottom surface. A heat-activated sealant layer is provided under the bottom surface of the PET layer to bond the seal to a container opening. The non-foam, heat-distributing layer is preferably a polyolefin film. Seals in accordance with preferred embodiments of the invention also include a top portion, which is only partially bonded (directly or indirectly) to the bottom portion, so as to leave a tab portion extending from the seal. The top portion is advantageously bonded from periphery to periphery of the bottom portion and at or slightly offset from the diameter (middle) of the bottom portion. The top portion is advantageously formed with polymer material, such as an ethylene vinyl acetate (EVA) layer, having a layer of PET bonded on the top thereof. A release strip, which can have a release layer coated on the bottom thereof, is adhered to the top or bottom structures and used to prevent the tab from adhering to the lower structure.
대표청구항
▼
We claim: 1. A pull-tab sealing member, having a top side and a bottom side constructed to be secured to a lip around an opening of a container, to close the container, the pull-tab sealing member comprising:a bottom member comprising a metal foil layer having a bottom surface for facing a container
We claim: 1. A pull-tab sealing member, having a top side and a bottom side constructed to be secured to a lip around an opening of a container, to close the container, the pull-tab sealing member comprising:a bottom member comprising a metal foil layer having a bottom surface for facing a container and a top surface on an opposite side thereof, a separate non-foam, heat-distributing polyolefin film layer having a top surface and a bottom surface, the bottom surface adhered to the top surface of the metal foil layer by an adhesive selected from the group consisting of ethylene acrylic acid copolymers, curable two part urethane adhesives, epoxy resins, and mixtures thereof, a lower polymer layer disposed on the bottom surface of the metal foil layer including a heat-activated sealant or adhesive coating for securing the bottom member to the container;the non-foam, heat-distributing polyolefin film layer includes a blend of a first and a second polyolefin component, a density of the second polyolefin component greater than a density of the first polyolefin component, and a density of the non-foam, heat-distributing polyolefin layer from about 0.96 to about 0.99 g/cc; anda top member comprising a top surface and bottom surface, a portion of the top member comprising a tab portion having a top and a bottom surface, the bottom surface of the tab portion not secured to the top surface of the non-foam, heat-distributing polyolefin film layer of the bottom member, and a portion of the bottom surface of the top member secured to the top surface of the non-foam, heat-distributing polyolefin film layer of the bottom member, the top member is secured to the bottom member in a sufficiently strong manner and the non-foam heat distributing polyolefin film layer is of a sufficient thickness so that when the heat-activated sealant or adhesive coating at the bottom surface of the bottom member is secured to a container, the bottom member can be removed by pulling on the tab portion without separating the tab portion from the top member or rupturing the non-foam heat-distributing polyolefin film layer.
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