- 专利标题： Ring manufacturing method, ring manufacturing apparatus, and ring manufactured by the ring manufacturing method
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申请号： US15213450申请日： 2016-07-19
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公开(公告)号： US10369616B2公开(公告)日： 2019-08-06
- 发明人: Masaki Takahashi
- 申请人： MOKUMEGANEYA Co., LTD.
- 申请人地址： JP Tokyo
- 专利权人： MOKUMEGANEYA Co., LTD.
- 当前专利权人： MOKUMEGANEYA Co., LTD.
- 当前专利权人地址： JP Tokyo
- 代理机构： Maier & Maier, PLLC
- 主分类号： B21D53/16
- IPC分类号： B21D53/16 ; B21D11/14 ; B21D28/00
摘要：
In a case of a “mark left” type, a slit is formed on a line side (slit side) of a joint portion. The slit is formed, for example, with a scroll saw. By the formation of the slit, a length of the joint portion in a direction orthogonal to an axial direction of a single ring is set to approximately 0.7 mm. In a case of a “mark removed” type, a slit and a slit are formed respectively on the line side (slit side) and a side opposite thereto of the joint portion. Those slits are formed, for example, with the scroll saw. By the formation of those slits, the length of the joint portion in the direction orthogonal to the axial direction of the single ring is set to approximately 0.8 mm.
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