Printing control system for laser printer

Details Printing control system for laser printer Printing control system for laser printer

1990-12-21

1991-08-13

Reinhart, Mark J.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

358296, G01D 942, B41J 244

Patent

active

050399985

ABSTRACT:
A printing control system is applied to a laser printer having a laser beam source for emitting a modulated laser beam, a laser beam scanner, a printing data memory to modulate a laser beam, a readout circuit for reading out printing data from the printing data memory, a beam-on signal generating circuit for generating a beam-on signal to emit a start beam from the laser beam source, a start pulse generating circuit for generating a start pulse after the detection of the start beam, and a beam-on signal resetting circuit for resetting the beam-on signal after the detection of the start pulse. The beam-on signal is forcibly turned OFF and the printing data from the printing data memory to the laser beam source is inhibited when an abnormal state of the start pulse due to an instantaneous cutoff of the laser beam is detected by the printing control system. Accordingly, printing operation is continued and stoppage of the printing is avoided even if a missing start pulse is detected.

REFERENCES:
patent: 3897150 (1975-07-01), Bridges et al.

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