Photocopying – Contact printing – Light boxes
Patent
1989-11-16
1990-10-23
Prescott, A. C.
Photocopying
Contact printing
Light boxes
355203, 355204, 355246, 118691, 118712, G03G 1508
Patent
active
049656341
ABSTRACT:
An image recording apparatus for electrostatically forming a latent image representative of a document on a photoconductive element, or image carrier, and developing the latent image by a developer to produce a visible image. The apparatus is capable of controlling the density of an image to be recorded by adjusting the amount of illumination, toner density, bias voltage for development, etc. A target toner density is selected in response to the density of a toner image which is formed on the image carrier and has a relatively high density. The amount of illumination is adjusted in response to the density of a toner image also formed on the image carrier and having a relatively low density. Further, the bis voltage is selected on the basis of a ratio of the density of a reference density pattern and the actual density of a document.
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Prescott A. C.
Ricoh & Company, Ltd.
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