Typewriting machines – Including interposed inking device for record-medium – Ribbon-reversing mechanism
Patent
1978-06-23
1981-05-05
Wright, Jr., Ernest T.
Typewriting machines
Including interposed inking device for record-medium
Ribbon-reversing mechanism
400 55, 4002195, 400225, 400229, 400234, 400245, 400124, B41J 3344
Patent
active
042655510
ABSTRACT:
In order to enable ink ribbon transport and ribbon reversal on the one hand and on the other hand the withdrawal of the printing head from the platen to be performed by means of only a single motor, a pawl-and-ratchet device is provided between the drive gearwheels for the reel holders and the drive motor. The cord for the withdrawal of the printing head is connected to a deflection lever which follows the profile of a cam disc of a cam mechanism, which is connected via a further pawl-and-ratchet device to the common shaft driven by the electric motor. The two pawl-and-ratchet devices drive in opposed directions. The common drive motor is reversible and is electrically controlled by the cam mechanism.
REFERENCES:
patent: 2654461 (1953-10-01), Bovio
patent: 2998878 (1961-09-01), Biedinger et al.
patent: 3038582 (1962-06-01), Frechette et al.
patent: 3587813 (1971-06-01), Dugeny et al.
patent: 3807544 (1974-04-01), Glover
patent: 3842958 (1974-10-01), Link
patent: 3904010 (1975-09-01), Krauss et al.
patent: 3990563 (1976-11-01), Adamek et al.
Adamek Manfred
Wurscher Horst
Smith Robert S.
U.S. Philips Corporation
Wright, Jr. Ernest T.
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