Image skew adjustment for a raster output scanning (ROS) system

Details Image skew adjustment for a raster output scanning (ROS) system Image skew adjustment for a raster output scanning (ROS) system

1991-10-01

1994-12-20

Fuller, Benjamin R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346108, 355204, H04N 129, G01D 942, G03G 2100

Patent

active

053749936

ABSTRACT:
A procedure is provided for adjusting for image line skew caused by tolerance accumulation between a Raster Output Scanning (ROS) assembly and a photoreceptor which is being scanned. The ROS housing is adjustably mounted in relation to the photoreceptor, so that incremental adjustments can be made to cause the output scan lines emerging from the ROS housing to be moved in the process or reverse process direction vis-a-vis the photoreceptor. A test print is generated which provides measurable scan delineators to identify the amount of scan line skew created by a photoreceptor misalignment. The measured scan line skew alignment is correlated with adjustments made by a hex head screw to provide a very precise alignment. The effective adjustment range is .+-.4 mm in the process direction which corresponds to .+-.6.3 milliradians of scan line skew.

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patent: 5214441 (1993-05-01), Blanding et al.
patent: 5257048 (1993-10-01), Genovese

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