Punch device for making window cut-outs

Details Punch device for making window cut-outs Punch device for making window cut-outs

1984-01-16

1985-08-27

Larson, Lowell A.

Manufacturing container or tube from paper; or other manufacturi

With cutting, breaking, tearing, or abrading

With scrap material separation or removal

493471, 493370, 83349, 76107C, B31B 124

Patent

active

045375887

ABSTRACT:
A rotary punch device for making window cut-outs in envelopes and cardboard oxes, with a clamping device for clamping a metal foil having a cutting edge etched out of the foil material. Vacuum bores in the cylindrical surface of the rotary punch retain the material for treatment in position while the punched-out portion of the window is initially also retained by a vacuum and blown away by an air blast on completion of the punch operation.

REFERENCES:
patent: 3010260 (1961-11-01), Subklew
patent: 3170342 (1965-02-01), Downie
patent: 3198093 (1965-08-01), Kirby et al.
patent: 3274871 (1966-09-01), Ehlscheid
patent: 3276306 (1966-10-01), Winkler et al.
patent: 3380327 (1968-04-01), Stemmler
patent: 3535955 (1970-10-01), Otto et al.
patent: 3611855 (1971-10-01), Thousand
patent: 4393738 (1983-07-01), Heyden

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