发明授权
- 专利标题： Method of making a plurality of optical record disc substrates
- 专利标题（中）： 制造多个光记录盘基片的方法
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申请号： US145236申请日： 1993-11-03
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公开(公告)号： US5458821A公开(公告)日： 1995-10-17
- 发明人: Seiki Shimazu , Kenji Yamaga , Yoshimi Sakai , Atsushi Koyama , Yuichi Namikawa
- 申请人： Seiki Shimazu , Kenji Yamaga , Yoshimi Sakai , Atsushi Koyama , Yuichi Namikawa
- 申请人地址： JPX Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX4-317916 19921104; JPX5-061274 19930226; JPX5-260419 19930927
- 主分类号： B29C45/26
- IPC分类号： B29C45/26 ; G11B7/26 ; B29C45/56
摘要：
A method of making a plurality of optical record disc substrates includes the steps of injecting a resin material into a plurality of disc-shaped cavities which are formed by closing a fixed mold half and a movable mold half; and cooling the injected resin material in the cavities. The cavities are grouped into a plurality of groups so that each group includes not less than one cavity, and each group is provided with a common actuation device so that each actuation device is independently operated.
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