发明名称 |
Production of tubular film |
摘要 |
Internal mandrel process and apparatus for the production of oriented tubular film in which rupture of the extruded tube by the pressure of inflating gas is prevented by means of a cup seal located between the mandrel and inflating zone, the cup seal being in peripheral engagement with the internal surface of the tube and presenting a substantially concave surface to the mandrel.
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申请公布号 |
US4062916(A) |
申请公布日期 |
1977.12.13 |
申请号 |
US19760658044 |
申请日期 |
1976.02.13 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LIMITED |
发明人 |
SKILLING, DEREK |
分类号 |
B29C47/00;B29C47/88;B29C47/90;(IPC1-7):B29D23/04 |
主分类号 |
B29C47/00 |
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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