发明名称 |
CLOSURE CAP SEAL AND METHOD AND APPARATUS FOR FORMING SEAL |
摘要 |
A linerless cap for a container and a method of forming the cap. In the method the cap is molded from plastic and includes a top wall, an outer depending skirt and an internal depending substantially annular wall having an upper end integral with and depending from the top wall and a lower free end. Thereafter the free end is engaged by an essentially concave surface of a curling tool to progressively turn the free end away from the internal wall to curve the free end into a curvilinear compressible and resilient free end adapted to be engaged for sealing. The engageable free end of the seal can have a coil, O, U, J or quarter round cross sectional shape and can be a rim, plug or corner seal. |
申请公布号 |
AU6738187(A) |
申请公布日期 |
1987.06.30 |
申请号 |
AU19870067381 |
申请日期 |
1986.12.05 |
申请人 |
TRI-TECH SYSTEMS INTERNATIONAL, INC. |
发明人 |
MORTIMER STAFFORD THOMPSON |
分类号 |
B29C57/00;B29C57/12;B65D41/04 |
主分类号 |
B29C57/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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