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

B - Operations, Transporting

41

J

328/188, 101/93

B41J 9/26 (2006.01) B41J 9/50 (2006.01) G06K 13/02 (2006.01)

Patent

CA 1217245

- 21 - CHARACTER SPACING CIRCUIT FOR CONTROLLING PRINT HAMMER FIRING Abstract of the Disclosure A circuit for controlling the firing of a print hammer so as to maintain constant inter-charac- ter spacing during printing. The speed of a motor which moves a document in printing relationship with a printer is used to ascertain the instantaneous veloci- ty of the document just prior to the firing of a hammer associated with the printer. An up/down count- er 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.

464026

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