B - Operations – Transporting – 21 – K
Patent
B - Operations, Transporting
21
K
B21K 23/00 (2006.01) A44C 3/00 (2006.01) A44C 21/00 (2006.01) B21D 53/44 (2006.01) B21J 5/02 (2006.01) B21K 1/30 (2006.01)
Patent
CA 2238165
A method and an apparatus for producing a disc product having a plane carrying a relief and helical ridges on the outer peripheral side. The inventive production method and the apparatus therefor have enabled a continuous processing of a material mass to forge into, produce and push out a disc product while retaining the quality of relief plane, thereby facilitating production of disc product by die forging.
Sakatani Fujio
Sasaoka Shinkichi
Tsuruga Shouichi
Yama Yoshinori
Fetherstonhaugh & Co.
Ministry Of Finance Japan Represented By Director-General Mint Bureau
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