Punch assembly for film products with work clamping means

Details Punch assembly for film products with work clamping means Punch assembly for film products with work clamping means

1975-02-18

1976-11-23

Schran, Donald R.

Cutting

With means to stretch work temporarily

83282, 83375, 83386, 83389, 83456, 83460, B26D 714

Patent

active

039929663

ABSTRACT:
Punching apparatus particularly adapted for use in connection with flexible film materials including cooperatively arranged punch and die assemblies arranged in aligned relationship, and ram means for reciprocably driving or stroking the punch assembly in a reciprocatory path into engagement with the work film and die for performing cutting or perforating operations on the film. A film clamping shoe is provided on the punch and is disposed in opposed relationship to the die assembly, the shoe being arranged to clampably engage the work film disposed between the punch and the die upon advancing or stroking motion of the punch. An annular flange extends upwardly from the surface of the die and toward the punch and film clamping shoe means so as to provide for taut engagement and retension of the film by the film clamping shoe means.

REFERENCES:
patent: 2376829 (1945-05-01), Sokolowsky
patent: 2432804 (1947-12-01), Rieske
patent: 2561050 (1951-07-01), Charron
patent: 3501985 (1970-03-01), Baran

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