Punching apparatus and the punching unit thereof

Cutting – Means to drive or to guide tool – Tool pair positionable as a unit

Reexamination Certificate

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Details

C083S685000, C029S465000

Reexamination Certificate

active

09760593

ABSTRACT:
A punching apparatus is provided which can of punch a non-circular holes at a predetermined position of a work piece. In the punching apparatus for punching a hole by means of a punch integrated into any one of the moving part of a press working machine or the supporting part of the press working machine, and a die integrated with the other one of the moving part and the supporting part; each of the punch and the die has plurality of planes to be fitted with datum planes of a fitting jig. The punching unit for the punching apparatus comprises a punch, a die, and a fitting jig for positioning the punch and the die with respect to each other, wherein each of the punch and the die has plurality of faces for fitting and the fitting jig has datum planes to be fitted with the planes for fitting of the punch and the die.

REFERENCES:
patent: 1801490 (1931-04-01), Falstrom
patent: 3568555 (1971-03-01), Stroh
patent: 3848494 (1974-11-01), Gargrave et al.
patent: 3880038 (1975-04-01), Mangos
patent: 4085639 (1978-04-01), Marconi
patent: 4552050 (1985-11-01), Grefe
patent: 4555840 (1985-12-01), Nakamura
patent: 4555968 (1985-12-01), Raney et al.
patent: 4945954 (1990-08-01), Wehrly et al.
patent: 5350347 (1994-09-01), Fujiwara et al.
patent: 5730039 (1998-03-01), Holliday et al.
patent: 03-277411 (1991-09-01), None
patent: 03-239498 (1991-10-01), None
patent: 08-071990 (1996-03-01), None
patent: 10-217198 (1998-08-01), None
patent: 2000-326296 (2000-11-01), None
Notice of Reasons for Rejection dated Apr. 22, 2003 (and English translation of same).

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