Position sensing for matrix printer

Details Position sensing for matrix printer Position sensing for matrix printer

1978-01-16

1980-06-17

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400322, 400323, 400342, 101 9305, B41J 312, B41J 1914

Patent

active

042081378

ABSTRACT:
An alternating current coupled dot column sensing circuit provides delayed dot position signals for control logic of a matrix printer to actuate the printing elements at the proper dot column positions in bi-directional printing. A sensor recognizes edges of slots in a timing strip across the printer and also recognizes end or home positions of the strip for use in such printing.

REFERENCES:
patent: 3833891 (1974-09-01), Howard et al.
patent: 3941051 (1976-03-01), Barrus et al.
patent: 3993181 (1976-11-01), Potma et al.
patent: 3999644 (1976-12-01), Pape et al.
patent: 4024506 (1977-05-01), Spaargaren
patent: 4116567 (1978-09-01), San Pietro

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