发明名称 |
APPARATUS FOR PRODUCING PERFORATED PLASTIC FILM |
摘要 |
<p>APPARATUS FOR PRODUCING PERFORATED PLASTIC FILM An apparatus for the manufacture of selectively apertured thermoplastic sheet or film, comprising a rotatable molding element means for receiving the film and which means has a predetermined pattern therein wherein as the film is contacted with the rotatable molding element means and a fluid pressure differential is applied to the surface of the film, a desired pattern of perforated areas and non-perforated areas are imparted to the film with each of said areas being continuous across the web of the film and alternating in the machine direction.</p> |
申请公布号 |
CA1243175(A) |
申请公布日期 |
1988.10.18 |
申请号 |
CA19840455153 |
申请日期 |
1984.05.25 |
申请人 |
ETHYL CORPORATION |
发明人 |
RALEY, GARLAND E.;SPEAR, DEAN M. |
分类号 |
B29C67/20;B26F1/26;B29C59/06;B29K105/04;C08J9/00;(IPC1-7):B29D7/01 |
主分类号 |
B29C67/20 |
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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