04411175 is referenced by 12 patents and cites 9 patents.

A ring-shaped mold of the split mold type constructed by assembling into an annular shape a plurality of sectorial separate blocks formed by cutting a ring-shaped workpiece haveing a mold surface on the annular circumference thereof, and the method and apparatus for making the same are disclosed. Sector lines interfacing adjoining the separate blocks on the mold surface intersect the circumference of the ring-shaped mold at angles not perpendicular to said circumference.

Title
Method for making a ring-shaped mold
Application Number
6/193977
Publication Number
4411175
Application Date
October 6, 1980
Publication Date
October 25, 1983
Inventor
Shoji Futamura
Kawasaki
JP
Koichi Hirano
Kodaira
JP
Kenichi Takahashi
Kodaira
JP
Agent
McGlew and Tuttle
Assignee
Institute of Technology Precision Electrical Discharge Works
JP
Bridgestone Tire
JP
IPC
B23P 17/00
B21K 5/20
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