发明授权
- 专利标题: Chemical manufacture
- 专利标题(中): 化学制造
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申请号: US3591882D申请日: 1969-08-21
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公开(公告)号: US3591882A公开(公告)日: 1971-07-13
- 发明人: PEARSALL RALPH E
- 申请人: USM CORP
- 专利权人: Emhart Enterprises Corp
- 当前专利权人: Emhart Enterprises Corp
- 优先权: US85179669 1969-08-21
- 主分类号: A43D35/00
- IPC分类号: A43D35/00 ; A43B13/38
摘要:
A flexible polyvinyl chloride foam member is provided with a permanent profile or shape by use of compressive pressure and radio frequency heating.