发明授权
US4733452A Production of jackets for flexible magnetic disks, and apparatus for
this purpose
失效
制造用于柔性磁盘的夹克,以及用于此目的的装置
- 专利标题: Production of jackets for flexible magnetic disks, and apparatus for this purpose
- 专利标题(中): 制造用于柔性磁盘的夹克,以及用于此目的的装置
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申请号: US873536申请日: 1986-06-12
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公开(公告)号: US4733452A公开(公告)日: 1988-03-29
- 发明人: Bernhard Lenz , Norbert Holl , Dietrich Gruehn , Kurt Zwintzscher
- 申请人: Bernhard Lenz , Norbert Holl , Dietrich Gruehn , Kurt Zwintzscher
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX3521383 19850614
- 主分类号: G11B23/03
- IPC分类号: G11B23/03 ; G11B23/033 ; B21D39/03 ; B23P19/00
摘要:
The jacket blanks punched out from a film web are folded to give jackets and then closed by spot welding with the aid of a wavy resistance belt, the welding temperature being produced for a short time by means of a current pulse in the resistance belt.
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