Pneumatic film punch

Details Pneumatic film punch Pneumatic film punch

1991-02-19

1992-04-21

Watts, Douglas D.

Selective cutting (e.g., punching)

Methods

234107, 83 13, 83571, 836395, B26F 104

Patent

active

051060175

ABSTRACT:
The invention is an improvement to punches for placing one or more openings on the edge of a sheet of material. A collection of individual punch pins are carried within bores in a punch block. Movement of the pins is constrained by a corresponding collection of pneumatic actuators. The constrained pins are driven against a die block to affect the punching operation. To insure that the punch pins do not interfere with the operation of the pneumatic actuators between machine cycles, a fixed retraction guide cooperates with a relieved section on each punch pin to position each pin at one extremity of the bore within which the actuator travels.

REFERENCES:
patent: 3176569 (1965-04-01), Daniels
patent: 3299761 (1967-01-01), Goldman
patent: 3350003 (1967-10-01), Jackowski
patent: 4000673 (1977-01-01), Lyon
patent: 4623089 (1986-11-01), Scott
patent: 4685613 (1987-08-01), Schambre
patent: 4976179 (1990-12-01), Lacrouts-Cazenave

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