Position tracking emitter for a printer with emitter pattern on

Details Position tracking emitter for a printer with emitter pattern on Position tracking emitter for a printer with emitter pattern on

1983-08-12

1984-10-09

Eickholt, E. H.

Typewriting machines

Control of print position along print-line by signal...

400328, 346139D, B41J 2116, G01D 1524

Patent

active

044758316

ABSTRACT:
An emiter marking pattern is provided on a lead screw in parallel with the thread of the lead screw. A carriage driven along by the lead screw contains a transducer for sensing the emitter marking pattern on the lead screw to produce electrical output signal pulses indicative of incremental displacement of the carriage. A printhead can be mounted on the carriage and the electrical output signal pulses from the transducer used to control printing operations. The emitter marking pattern can be designed to provide control signals for other purposes, for example for controlling start-up, running, deceleration and reversal of a motor driving the lead screw.

REFERENCES:
patent: 3518699 (1970-06-01), Mitchell
patent: 3523160 (1970-08-01), Willey
patent: 4169685 (1979-10-01), Gruber
patent: 4247214 (1981-01-01), Swan, Jr.
patent: 4343012 (1982-08-01), Knapp

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