Relieved serrated dies for rotary punching units

Details Relieved serrated dies for rotary punching units Relieved serrated dies for rotary punching units

1984-05-08

1986-11-11

Meister, James M.

Cutting

Tool or tool with support

Rotatable type

83345, 83686, 83690, B26F 110

Patent

active

046215565

ABSTRACT:
A serrated rotary die having a minimum die cutback angle .theta., wherein ##EQU1## where CL DIST is the centerline distance between punch and die axes of rotation, ##EQU2## MD is a die internal diameter at the die teeth roots, and HT is the height of the die over midpoint.

REFERENCES:
patent: 2085864 (1937-06-01), Lindbom
patent: 2404793 (1946-07-01), Dickerman
patent: 3106859 (1963-10-01), Huffman
patent: 4273015 (1981-06-01), Johnson
patent: 4277944 (1981-07-01), Gargrave

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