For constant pressure in line-web crush-scoring

Details For constant pressure in line-web crush-scoring For constant pressure in line-web crush-scoring

1987-06-30

1988-12-13

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

With cutting, breaking, tearing, or abrading

And with bending

493403, B05B 114

Patent

active

047908050

ABSTRACT:
There is provided an apparatus for applying constant pressure to a knife blade for crush-scoring, wherein the knife blade is supported in a substantially frictionless manner and the constant pressure is supplied by a flexible diaphragm acting on a plunger which can move substantially without friction in a pneumatic cylinder.

REFERENCES:
patent: 1895852 (1933-01-01), Johnstone
patent: 2712852 (1955-07-01), Carter
patent: 3332326 (1967-07-01), Haas
patent: 3917255 (1975-11-01), Watrous
patent: 4257298 (1981-03-01), Agkut
patent: 4678457 (1987-07-01), Slobodkin

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