Dual mode laser printer

Details Dual mode laser printer Dual mode laser printer

1984-11-26

1986-03-25

Hartary, Joseph W.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346154, 346108, 355 3R, G01D 1514

Patent

active

045786895

ABSTRACT:
A dual mode laser printer utilizes a program-controlled microprocessor to switch between a high resolution, slow speed mode and a low resolution, high speed mode. In the printer a laser beam is modulated at a rate which is a first division of a system clock rate. This beam is caused to focus on a recording medium and, due to a rotating multi-faceted polygon, the beam sweeps across the medium. The medium is moved according to a second division of the system clock. By means of the microprocessor, the printer can be in either: (1) the high resolution mode in which the laser beam is modulated at a high rate due to the first divided signal and the medium moves at a slow rate due to the second divided signal, or (2) the low resolution mode in which the light beam is modulated at a lower rate due to the first divided signal and the medium moves at a faster rate due to the second divided signal.

REFERENCES:
patent: 4319285 (1982-03-01), Minero
patent: 4330195 (1982-05-01), Lavallee
patent: 4491853 (1985-01-01), Hayashi et al.

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