Cutting device

Details Cutting device Cutting device

1977-06-20

1978-12-19

Schram, Donald R.

Cutting

Cutter with timed stroke relative to moving work

Uniform periodic tool actuation

83342, 83911, 83355, B26D 520

Patent

active

041300394

ABSTRACT:
An improved cutting device of the type having rotary vane knives, which cerate with stationary knives, for making patterned cuts in the edges of paper webs, particularly for the preparation of envelopes or envelope blanks, is provided. The device includes at least one cooperating knife pair, comprising one rotary knife and one stationary knife, disposed for cooperative engagement for making patterned cuts in the edges of paper webs moving therepast. The blades are made of materials differing from one another in hardness to an extent such that the softer knife can have material removed from it without damage to the latter, and at least one of the knives of the cooperating knife pair, is mounted for feeding movement toward its associated cooperating knife, while the cutting device is operated.

REFERENCES:
patent: 864552 (1907-08-01), Perkins et al.
patent: 2100930 (1937-11-01), Hiken
patent: 3327576 (1967-06-01), Heywood
patent: 3367222 (1968-02-01), Mummery
patent: 3782233 (1974-01-01), Helm
patent: 4016789 (1977-04-01), Helm

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