Character spacing circuit for controlling print hammer firing

Details Character spacing circuit for controlling print hammer firing Character spacing circuit for controlling print hammer firing

1986-07-18

1987-05-12

Zazworsky, John

Printing

Inkers

Roller

101 91, 101233, 307234, 307517, 307518, H03K 513, H03K 5153, B41L 4746, B41F 1324

Patent

active

046653716

ABSTRACT:
A circuit for controlling the firing of a print hammer so as to maintain constant intercharacter spacing during printing. The speed of a motor which moves a document in printing relationship with a printer is used to ascertain the instantaneous velocity of the document just prior to the firing of a hammer associated with the printer. An up/down counter is used in determining the delay, if any, in firing the hammer to compensate for instantaneous velocities which are slower than the fastest velocity of document travel expected.

REFERENCES:
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patent: 3705417 (1972-12-01), Asmussen
patent: 3866533 (1975-02-01), Gilbert et al.
patent: 3980960 (1976-09-01), Hutchinson
patent: 3986091 (1976-10-01), Quiogue et al.
patent: 4015701 (1977-04-01), Templeton
patent: 4203678 (1980-05-01), Nordstrom et al.
patent: 4235167 (1980-11-01), Staugaard
patent: 4259903 (1981-04-01), Arendt et al.
patent: 4286516 (1981-09-01), Wertanen
patent: 4552065 (1985-11-01), Billington et al.

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