发明授权
US4564408A Process and device for covering a lens preform with a protective sheet
失效
用保护片覆盖镜片预制件的工艺和装置
- 专利标题： Process and device for covering a lens preform with a protective sheet
- 专利标题（中）： 用保护片覆盖镜片预制件的工艺和装置
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申请号： US614037申请日： 1984-05-25
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公开(公告)号： US4564408A公开(公告)日： 1986-01-14
- 发明人: Richard Crumbach , Heinz-Josef Schilde , Helmut Tiedemann
- 申请人： Richard Crumbach , Heinz-Josef Schilde , Helmut Tiedemann
- 申请人地址： FRX Aubervilliers
- 专利权人： Saint-Gobain Vitrage
- 当前专利权人： Saint-Gobain Vitrage
- 当前专利权人地址： FRX Aubervilliers
- 优先权： FRX8308580 19830525
- 主分类号： G02B1/10
- IPC分类号： G02B1/10 ; B29C63/02 ; B29D11/00 ; B32B37/10
摘要：
To cover the concave face of a lens preform with a protective sheet of transparent plastic by an elastic pressing element, the invention proposes inserting an elastic membrane between the pressing element and the protective sheet. Before or during pressing, the membrane is lowered over the preform which has been provided with the protective sheet. As a result of its presence, the entire peripheral area of the protective sheet can be applied homogeneously against the edge of the preform.
公开/授权文献
- US5834336A Backside encapsulation of tape automated bonding device 公开/授权日：1998-11-10