Paper slitter or perforator automatic constant normal force syst

Details Paper slitter or perforator automatic constant normal force syst Paper slitter or perforator automatic constant normal force syst

1997-09-11

1999-08-17

Vo, Peter

Cutting

Rotatable disc tool pair or tool and carrier

Tool pair comprises rotatable tools

83504, 835082, B23D 1904

Patent

active

059377216

ABSTRACT:
A system for shearing (slitting or perforating) sheets in a paper path, with a system for selectably changing the sheet shearing position anywhere transversely of the entire sheet width, with a first shearing member such as a rotatable disk moveable laterally of the paper path on one side of the paper path mating with a second shearing member, preferably a rotatable annularly grooved hub, mounted for movement laterally of the paper path on the opposite side of the paper path; wherein these first and second shearing members are maintained aligned and operatively mating through the paper path for sheet shearing with an automatic alignment and normal force system automatically coordinated with changing the lateral shearing position of the sheets, yet with no direct mechanical connection therebetween or through the paper path. Disclosed therefor is an elongateable constant force spring connecting to the second shearing member to pull it laterally into engagement with the first shearing member, which may at a side wall of the hub groove, with a constant force irrespective of the lateral repositioning.

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patent: 5412461 (1995-05-01), Thayer
patent: 5596918 (1997-01-01), Longwell et al.
patent: 5632189 (1997-05-01), Larson

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