Typewriter ribbon conveying mechanism

Details Typewriter ribbon conveying mechanism Typewriter ribbon conveying mechanism

1974-11-18

1976-08-24

Oechsle, Anton O.

Textiles: fiber preparation

B41J 3348

Patent

active

039761851

ABSTRACT:
A ribbon cassette support is pivotally mounted on the printing head carriage of a typewriter. The support includes driving pawls for driving the cassette hubs and a member selectively disengaging one pawl from one hub to allow driving of the other hub by the other pawl in a direction to wind on the ribbon. When the ribbon is fully wound out from said one hub, the continuing action of the driving pawl on the other hug tips the cassette support to a new position in which the control member engages said one pawl and disengages the other, thereby reversing the direction of drive of the ribbon. The cassette support and control member are connected by a spring simultaneously biasing both the support and the member into one of two stable positions.

REFERENCES:
patent: 2505991 (1950-05-01), Reinhold
patent: 2906203 (1959-09-01), Grosse
patent: 2978090 (1961-04-01), Brandt
patent: 3011434 (1961-12-01), Schenk
patent: 3752290 (1973-08-01), Langheinrich
patent: 3793951 (1974-02-01), Denley

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