Constant rate ribbon winding mechanism

Details Constant rate ribbon winding mechanism Constant rate ribbon winding mechanism

1977-10-17

1979-09-18

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400236, B41J 3314

Patent

active

041681274

ABSTRACT:
A mechanism for winding a ribbon on a take-up spool effects a constant winding rate as the diameter of the wound ribbon on the spool increases. A wrap spring intermittently drives a gear which rotates the spool in a stepwise fashion, the free end of the wrap spring being reciprocated by the stroke of an actuating arm. The amount of ribbon which is wound on the spool is sensed by a diameter sensor, which sensor controls the point on the free end of the wrap spring which is contacted by the actuating arm.

REFERENCES:
patent: 981808 (1911-01-01), Steele
patent: 981809 (1911-01-01), Steele
patent: 2734614 (1956-02-01), Page
patent: 3348650 (1967-10-01), Meinherz et al.
patent: 3401783 (1968-09-01), Norwood et al.
patent: 3677486 (1972-07-01), Findlay
patent: 3834511 (1974-09-01), Hengelhaupt
patent: 3923141 (1975-12-01), Hengelhaupt

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