Method and apparatus applicable to multicolor developing device

Details Method and apparatus applicable to multicolor developing device Method and apparatus applicable to multicolor developing device

1988-03-15

1989-06-06

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118689, 118691, 2503381, 250341, 355 14D, G03G 2100

Patent

active

048375977

ABSTRACT:
A light absorbing body is located to adjoin the back of an image carrier which is made of a light transmitting member. A latent image representative of an exclusive pattern for density detection is formed in a non-image region of the image carrier and developed by toner of any of multiple colors to become a toner image adapted for density detection. The toner image is illuminated so that image density is detected in terms of the intensity of light which is reflected by the toner image. The light absorbing body is made up of a plurality of absorbing members each having predetermined absorptivity. The absorbing members are selectively used in association with the spectral reflectivity characteristic of toner.

REFERENCES:
patent: 3376426 (1968-04-01), Frommer et al.
patent: 3623818 (1971-11-01), Gardner et al.
patent: 4550998 (1985-11-01), Nishikawa
patent: 4644163 (1987-02-01), Selander
patent: 4742228 (1988-05-01), Bischoff
patent: 4750838 (1988-06-01), DeWolf et al.

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