Lateral position control means for data printer heads

Details Lateral position control means for data printer heads Lateral position control means for data printer heads

1977-02-09

1980-04-01

Wright, Jr., Ernest T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400279, 400320, 400323, 400328, B41J 304

Patent

active

041959388

ABSTRACT:
A rotary encoder is coupled to the drive for a printing head to detect and encode movement of the drive and produce signals therefrom which are used to control the direction and positioning of the printing head. A rotating disc-like wheel in the encoder has a plurality of peripheral window openings which act in conjunction with a light source and detector to produce a signal train from which the movement and instantaneous location of the printing head is determined.

REFERENCES:
patent: 3779359 (1973-12-01), Morrison et al.
patent: 3789971 (1974-02-01), Deyesso et al.
patent: 3891077 (1975-06-01), Sauerbrunn
patent: 3970183 (1976-07-01), Robinson et al.
patent: 4024941 (1977-05-01), Sekikawa et al.
patent: 4027761 (1977-06-01), Quaif
IBM Technical Disclosure Bulletin, "Electromechanical Left-Hand Final Stop", Baker et al., vol. 18, No. 7, Dec. 1975, pp. 2218-2219.

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