Typewriter

Details Typewriter Typewriter

1981-05-05

1983-05-17

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

By gear train

400568, 74354, B41J 1978

Patent

active

043837786

ABSTRACT:
In the typewriter driving of the platen (1) is effected by the motor shaft (3) which operates a character selection device. This motor shaft (3) and the platen (1) occupy predetermined angular positions at rest.
During a driving command of the platen, a part (26) brings a transmission pinion (22) into mesh with the last controlled pinion (9) of a gear train (5 to 9) coupled to the motor shaft (3) before this shaft is actuated by the motor (4). The transmission pinion (22) is secured to one end of the transmission shaft (16, 19, 20) and the other end of the shaft carries a toothed wheel (15) in mesh with a driving pinion (14) secured to the platen. The angular notching of the pinions and their number of teeth is provided in such a manner that the teeth of the pinion (22) engage exactly between the teeth of the controlled pinion (9).

REFERENCES:
patent: 3280957 (1966-10-01), Thiel
patent: 3618738 (1971-11-01), Boyatt et al.
patent: 3935938 (1976-02-01), Hodne
patent: 3983985 (1976-10-01), Guerrini et al.

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