Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1990-08-06
1991-09-24
Reinhart, Mark J.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
358296, 346160, G01D 1516, H04N 121
Patent
active
050517570
ABSTRACT:
An optical scanning image forming apparatus having a photoreceptor member, an irradiating optical unit for modulating an optical beam from a beam source in accordance with image information and then for forming an image by scanning this modulated optical beam on the photoreceptor member, and an optical beam passing slit plate disposed in a path of the optical beam between the photoreceptor member and the irradiating optical unit, and a cylindrical lens having a positive power in one direction of a width of the optical beam passing slit plate. The cylindrical lens is disposed adjacent the slit plate and is capable by means of its converging effect of offsetting beam spreading-out due to diffraction of the slit plate. By impressing the slit plate with an electric potential of the same polarity as that of toner adhered to the photoreceptor member, it is possible to prevent adhesion of the toner to the slit plate.
REFERENCES:
patent: 4209793 (1980-06-01), Ueno
patent: 4265524 (1981-05-01), Compton
patent: 4270149 (1981-05-01), Ohta et al.
patent: 4370678 (1983-01-01), Kitamura
patent: 4764776 (1988-08-01), Mugrauer
Minolta Camera Kabushiki Kaisha
Reinhart Mark J.
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