Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic
Patent
1995-05-03
2000-09-26
Barlow, John
Incremental printing of symbolic information
Electric marking apparatus or processes
Electrostatic
B41J 2435, G01D 1514, H01J 2970, H01J 3300
Patent
active
061248703
ABSTRACT:
An image forming apparatus converts image data with recording density of 600 dpi which have been created in a host computer so that recording density in a vertical scanning direction is 300 dpi and recording density in a horizontal scanning direction is 1200 dpi, and outputs the converted image data to an optical system of a printer engine synchronizing with a clock frequency which is four times a normal clock frequency so as to form an image. As a result, the recording density in the horizontal scanning direction is not converted so as to be equal to the recording density in the vertical scanning direction in a conventional way, but is converted so as to have higher resolution. Therefore, an image with more improved printing quality than a conventional one can be formed by using a laser printer which can be arranged at a comparatively low price.
REFERENCES:
patent: 5321432 (1994-06-01), Ishikawa et al.
patent: 5333039 (1994-07-01), Sagara
patent: 5337258 (1994-08-01), Dennis
patent: 5486927 (1996-01-01), Koizumi et al.
Barlow John
Conlin David G.
Gordon Raquel Yvette
Sharp Kabushiki Kaisha
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