发明名称 |
Apparatus for the edges of thermoplastic webs |
摘要 |
The edge knurling of a thermoplastic web must often be carried out at elevated pressure in order to ensure a sufficient knurling depth even after the web has been wound and unwound different times. The prior heating of the web margins permits knurling to be carried out at lower pressures but may adversely influence the crystallinity of a film and also requires an increased amount of energy.
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申请公布号 |
US4021179(A) |
申请公布日期 |
1977.05.03 |
申请号 |
US19760669623 |
申请日期 |
1976.03.23 |
申请人 |
AGFA-GEVAERT N.V. |
发明人 |
PIRA, FRANCOIS JEAN;VAN WIJK, JOZEF CAROLUS |
分类号 |
B29C59/04;B29C65/00;B29C67/00;(IPC1-7):B29C15/00;B29C17/00 |
主分类号 |
B29C59/04 |
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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