Laser printer for printing a plurality of output-images sizes

Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means

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355 56, 358293, G01D 942

Patent

active

046511695

ABSTRACT:
A multi-format laser printer is disclosed which uses a constantly rotating polygon to line scan an intensity modulated beam of laser light across an image zone. Optical means, which include a cylindrical mirror are provided for causing first and second beam spot sizes to be in focus at the image zone. The first beam spot size is selected to be in focus for a first range of line scan lengths and the second beam spot size is selected to be in focus for at least one predetermined line scan length not in such range. The line scan length in the first range is adjusted by changing the periodicity of modulation of the laser beam. The velocity of the photosensitive member is adjusted to change the length of the output image in the page scan direction.

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patent: 4308544 (1981-12-01), Lucero et al.
patent: 4342050 (1982-07-01), Traino
patent: 4390882 (1983-06-01), Ohara et al.

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