Synchronous web cutting apparatus

Details Synchronous web cutting apparatus Synchronous web cutting apparatus

1977-07-28

1978-08-01

Schran, Donald R.

Cutting

Cutting motion of tool has component in direction of moving...

Interrelated control of tool and work-feed drives

83320, B23D 2504

Patent

active

041035755

ABSTRACT:
An apparatus for cutting a continuously horizontally moving web into desired lengths comprises a first slider crank mechanism 21 for horizontally reciprocating a first slider 71 mounting relatively reciprocable cutting edges 81, 82 disposed below and above the web, a second slider crank mechanism 22 for vertically reciprocating the upper cutting edge 82 via a second slider 72 to sever the web, and a third slider crank mechanism 23 for horizontally reciprocating a third slider 73 mounting a torque balancing weight 83. All three mechanisms are driven by a common rotary shaft 13, and the angles between the crank arms of the mechanisms and the magnitude of the balancing weight are selected such that the shaft torque is substantially constant over the cutting region whereat the first slider moves at a substantially constant speed approximately equal to that of the travelling web.

REFERENCES:
patent: 3712165 (1973-01-01), Meyer
patent: 3799018 (1974-03-01), Mumford
patent: 3921484 (1975-11-01), Rasenberger

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