发明授权
- 专利标题: Method of manufacturing a shadow mask for a color cathode ray tube
- 专利标题(中): 制造彩色阴极射线管荫罩的方法
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申请号: US603867申请日: 1984-04-25
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公开(公告)号: US4536226A公开(公告)日: 1985-08-20
- 发明人: Yasuhisa Ohtake , Hiroshi Tanaka , Koichiro Oka
- 申请人: Yasuhisa Ohtake , Hiroshi Tanaka , Koichiro Oka
- 申请人地址: JPX Kawasaki
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX58-72935 19830427
- 主分类号: B21D22/26
- IPC分类号: B21D22/26 ; C21D8/00 ; C21D8/02 ; C21D9/46 ; H01J9/14 ; C21D8/04 ; C22C38/08
摘要:
A method of manufacturing a shadow mask includes the steps of perforating a number of apertures in a sheet of iron-nickel alloy, annealing the sheet, and forming the sheet, after annealing, into a shadow mask by pressing while the sheet is kept at a predetermined forming temperature effective to reduce the yield strength of the alloy.
公开/授权文献
- US5776597A Speaker damper 公开/授权日:1998-07-07
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