发明授权
- 专利标题： Multi-layer resin molded article and method of making the same
- 专利标题（中）： 多层树脂成型体及其制造方法
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申请号： US22210申请日： 1987-03-05
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公开(公告)号： US4805991A公开(公告)日： 1989-02-21
- 发明人: Takashi Arai , Katsuo Kawano , Hidekazu Okajima
- 申请人： Takashi Arai , Katsuo Kawano , Hidekazu Okajima
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX61-55266 19860313; JPX61-75142 19860401; JPX61-90158[U]JPX 19860612
- 主分类号： B29C45/16
- IPC分类号： B29C45/16 ; G02B7/02 ; G02B7/04
摘要：
When making a generally cylindrical article such as the barrel member of a lens barrel into a cylindrical molded article by the use of a resin material, a sandwich-molded article is formed by using a core layer resin material for the central layer of the molded article and surrounding the central layer by a skin layer resin material, the cylindrical molded article is a helicoid cylinder constituting the barrel, or a cylinder member provided with a toothed portion for receiving a drive force, or other barrel-constituting member, and the thickness of the skin layer resin material of the toothed portion of the helicoid cylinder or the barrel-constituting member is controlled.
公开/授权文献
- US5909534A Ventilator with far infrared generators 公开/授权日：1999-06-01
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