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

1979-08-22

1981-12-15

Wright, Jr., Ernest T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400320, 400323, 4007051, B41J 304

Patent

active

043056741

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: 3814011 (1974-06-01), Kashio
patent: 3858702 (1975-01-01), Azuma
patent: 3970183 (1976-07-01), Robinson et al.
patent: 4050563 (1977-09-01), Menhennett
patent: 4114750 (1978-09-01), Baeck et al.
patent: 4195938 (1980-04-01), Velazquez

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