Method of working small recess portion

Details Method of working small recess portion Method of working small recess portion

2005-09-14

2009-06-16

Ross, Dana (Department: 3725)

Metal deforming

With cutting

By composite tool

C072S414000, C072S379600

Reexamination Certificate

active

07546757

ABSTRACT:
The invention is directed to a method of working a small recess portion. In the method, prior to press-forming small recess portions arrayed in a row by pressing a predetermined number of pieces of aligned male dies to a metal base plate, the metal base plate is previously formed with a highly rigid portion at a predetermined portion at a vicinity of an imaginary line extending in a row direction along end portions of predicted press portions to which the respective male dies are pressed.

REFERENCES:
patent: 2775284 (1956-12-01), Hermann
patent: 3074150 (1963-01-01), Berg
patent: 3101690 (1963-08-01), O'Day et al.
patent: 4220031 (1980-09-01), Naslund
patent: 4434637 (1984-03-01), Bailey
patent: 4603572 (1986-08-01), Van Breukelen et al.
patent: 6833214 (2004-12-01), Funatsu et al.
patent: 2004/0107759 (2004-06-01), Akahane et al.
patent: 2005/0044919 (2005-03-01), Takashima et al.
patent: 2004-98165 (2004-04-01), None

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