Process and apparatus for punching sheets or webs of paper, card

Details Process and apparatus for punching sheets or webs of paper, card Process and apparatus for punching sheets or webs of paper, card

1975-08-04

1976-12-21

Vlachos, Leonidas

Cutting

Cutting motion of tool has component in direction of moving...

Orbital motion of cutting blade

83 38, B23D 2504

Patent

active

039981193

ABSTRACT:
In a cutting apparatus or punch press for repeatedly cutting or punching a work shape from a continuously travelling web or sheet of paper, cardboard or similar material, the cutting dies or punch tools are mounted for reciprocation longitudinally in the direction of feed of the web or sheet on press platens that open and close and sustain the punching forces but do not themselves move in the direction of feed. By means of a drive mechanism operating in synchronism with the opening and closing movements of the press platens the punch tools are accelerated from rest in the direction of feed to attain the speed of the work web or sheet at the instant of punching and then are decelerated to rest and moved in reverse back to the initial position of the cycle. The stroke of the reciprocation may be adjusted to suit different lengths of the work shape to be punched.

REFERENCES:
patent: 2153524 (1939-04-01), Schmidt
patent: 3765286 (1973-10-01), Vossen

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