发明名称 |
Method for compensating shrinkage of plastic webs |
摘要 |
When producing plastic cards, a plurality of layers is laminated under application of heat and pressure resulting in unpredictable shrinking. In order to compensate shrinking, the laminated web is elongated to adapt to its nominal alignment size. Elongation is produced by material displacement along grid bars separating to-be-fabricated cards later punched off the web leaving a waste grid.
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申请公布号 |
US5785907(A) |
申请公布日期 |
1998.07.28 |
申请号 |
US19960751519 |
申请日期 |
1996.11.15 |
申请人 |
MELZER MASCHINENBAU GMBH |
发明人 |
MELZER, RAINER;MELZER, ROLAND |
分类号 |
B29C37/00;B29C55/04;B29C59/00;B29C59/02;B29C67/00;B29K27/06;(IPC1-7):B29C43/58 |
主分类号 |
B29C37/00 |
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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