Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic
Patent
1996-03-08
1998-09-15
Le, N.
Incremental printing of symbolic information
Electric marking apparatus or processes
Electrostatic
347240, 347140, 399 46, B41J 2385, B41J 247, G01D 1514
Patent
active
058086510
ABSTRACT:
A line width controlling method for controlling a line width of a toner image includes adjusting pulse width signals for controlling light beam emission of a laser beam generator; forming a latent patch image, comprised of plural latent line images, on a photoreceptor by irradiating a light beam from the laser beam generator; and developing the latent patch image with toner so as to form a toner patch image comprised of toner line images. The steps of forming the latent patch image and of developing the latent patch image to form the toner patch image are both repeated for a plurality of times. The toner patch image at each time of forming has a different gradation from that at other times of forming, so that a series of toner patch images is formed on the photoreceptor. The optical densities of the series of toner patch images are measured so as to obtain a variation curve of the measured optical densities, and an inflection point in the variation curve of the measured optical densities is detected, using index signals for controlling the laser beam generator. The line width of the toner image is adjusted according to data of the detected inflection point.
REFERENCES:
patent: 3937430 (1976-02-01), Engle
patent: 5493321 (1996-02-01), Zwadlo
Gordon Raquel Yvette
Konica Corporation
Le N.
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