Running web cutting machine

Details Running web cutting machine Running web cutting machine

1978-11-14

1980-09-09

Yost, Frank T.

Cutting

With control means responsive to replaceable or selectable...

83110, 83298, 83320, B26D 156

Patent

active

042211450

ABSTRACT:
A running web cutting device in which a vertically movable cutter is driven by a crank mechanism. A reciprocating stand holding an upper cutting edge and lower cutting edge is provided in such a manner to be moved in the direction of advancement of a web by a reciprocating guide. The upper and lower cutting edges are driven through the same crank shaft coupled to a cutter driving motor. A value J (J=J Wo/To where J is the conversion inertial moment of a driving motor including a load, Wo is the rated speed thereof, and To is the rated torque thereof) of said cutter driving motor is represented by J.sub.C while a value J of a web feeding motor driving a web feeding drum is represented by J.sub.F. The cutter driving motor and the web feeding motor are chosen so that J.sub.C smaller than J.sub.F. Pulse generators are coupled to the web feeding motor and the cutter driving motor, respectively, and a pulse thinning-out circuit for controlling a movement speed, in the direction of advancement of said web, of said cutter is provided in a control circuit of the cutter driving motor.

REFERENCES:
patent: 1844107 (1932-02-01), Sheperdson
patent: 1878121 (1932-09-01), Edwards
patent: 3543624 (1970-12-01), Richards
patent: 4103575 (1978-08-01), Utsui et al.

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