发明授权
- 专利标题： Method of manufacturing bottomed hollow cylinder using a press
- 专利标题（中）： 使用压机制造有底的中空圆筒的方法
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申请号： US811437申请日： 1997-03-03
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公开(公告)号： US5924188A公开(公告)日： 1999-07-20
- 发明人: Yasunori Tokunou , Kouichi Inoue , Toshikazu Shogase , Makoto Sunouchi , Takeshi Yoshikawa
- 申请人： Yasunori Tokunou , Kouichi Inoue , Toshikazu Shogase , Makoto Sunouchi , Takeshi Yoshikawa
- 申请人地址： JPX Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX8-045744 19960304; JPX8-220906 19960822
- 主分类号： B21D22/26
- IPC分类号： B21D22/26 ; B21D22/30 ; B21D51/10 ; B21D53/00 ; G11B5/52 ; G11B5/53 ; G11B15/61 ; G11B5/127
摘要：
A manufacturing method is provided for forming a hollow cylinder with a bottom which may be employed in rotary head drums of magnetic recording and reproduction systems such as video tape recorders and digital audio tape recorders.The manufacturing method includes pressing a single circular plate to form the hollow cylinder, thrusting an end of a side wall of the hollow cylinder in a direction substantially parallel to the side wall in a press die so as to adjust the thickness of the side wall to be uniform, and machining an outer surface of the side wall of the hollow cylinder so as to have a given surface roughness and a given roundness.
公开/授权文献
- US5333071A Holographic display apparatus 公开/授权日：1994-07-26
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