Punching apparatus for moving a punching unit in a circumferenti

Details Punching apparatus for moving a punching unit in a circumferenti Punching apparatus for moving a punching unit in a circumferenti

1995-02-10

1998-01-20

Rada, Rinaldi I.

Cutting

Processes

Cutting wall of hollow work

83184, 83185, 83191, 83948, 346 33R, 346138, B26F 108

Patent

active

057091390

ABSTRACT:
A photosensitive material is mounted onto an inner surface of a cylindrical inner surface drum. An input signal which provides the size of the photosensitive material is supplied to a controller. As the controller drives a pulse motor under the control of a control signal, a moving part with which punching units are connected is moved in a circumferential direction of the drum by means of the pulse motor and positioned at the desired positions for punching. Then only two punching units, determined by the controller in accordance with the size of the photosensitive material, are driven to punch holes in the photosensitive material.

REFERENCES:
patent: 3689932 (1972-09-01), Gerber
patent: 4260998 (1981-04-01), Fukui
patent: 4437371 (1984-03-01), Howerton et al.
patent: 4500285 (1985-02-01), Klotmann et al.
patent: 4637710 (1987-01-01), Fujii et al.
patent: 4723134 (1988-02-01), Morita et al.

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