Constant force spring system for ribbon cartridges

Details Constant force spring system for ribbon cartridges Constant force spring system for ribbon cartridges

1992-01-10

1993-11-09

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

267166, 400242, B41J 3314

Patent

active

052596796

ABSTRACT:
A V-shaped spring system has opposite ends formed by first and second arms and a pair of intermediate coil springs joined by a bridge. One of the coil springs pivotally receives a fixed axle, and the first arm extends from each spring. The second arms extends from the other spring. The spring operates to exert a substantially constant and limited force when the first arm is moved through an angle of up to 90.degree..

REFERENCES:
patent: 4367052 (1983-01-01), Steger
patent: 4986678 (1991-01-01), Hwang
patent: 4990008 (1991-02-01), Hwang
patent: 4998833 (1991-03-01), Chiman

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