发明授权
- 专利标题： Heat sealing of plastic sheets
- 专利标题（中）： 塑料片的热封
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申请号： US716983申请日： 1976-08-23
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公开(公告)号： US4036676A公开(公告)日： 1977-07-19
- 发明人: William Pennington
- 申请人： William Pennington
- 专利权人： William Pennington
- 当前专利权人： William Pennington
- 主分类号： B29C65/00
- IPC分类号： B29C65/00 ; B29C65/04 ; B29C65/74 ; B29C27/04 ; H05B9/04
摘要：
The heat bonding of plastic sheets includes the steps:A. transmitting high frequency electrical energy in one direction through a firstportion of said sheets of sufficient area as to preclude heat bonding of the sheets at said first portion thereof, andB. transmitting said energy back through a second portion of the sheets and of sufficiently reduced area as to effect heating bonding of the sheets at said second portion.
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