Electrographic copier with three development stations

Details Electrographic copier with three development stations Electrographic copier with three development stations

1986-11-17

1987-10-13

Wong, Peter S.

Photocopying

Including fiber optics

355 3TR, 355 14TR, G03G 1500

Patent

active

046995005

ABSTRACT:
An electrographic apparatus has a photoconductor in the form of an endless web, and latent images are formed on one side of the web. The photoconductor is advanced along a path past three development stations at which latent electrostatic images on the web can be developed with colored developer material from the stations. The web is mounted for travel along a path spaced from the three development stations with the latent images of the photoconductor facing the development stations as the web passes the development stations. A plurality of back-up rollers positioned on the side of the web opposite from the development stations can engage the web to move the web out of its path of travel spaced from the development stations into a position relative to any single one of the development stations so that a latent image can be developed by such station. The three development stations are located with respect to each other and the web to enable two of the back-up rollers to be moved to bring the web into a position relative to only two of the development stations so that said two of the development stations simultaneously apply developer material to latent images on the photoconductor with the web continuing to be spaced from the other development station. High productivity is achieved, and operation of the development stations can be stopped fast and reliably.

REFERENCES:
patent: 3743407 (1973-07-01), Smith
patent: 4096826 (1978-06-01), Stange
patent: 4251154 (1981-02-01), Russel
patent: 4299902 (1981-11-01), Soma et al.
patent: 4369732 (1983-01-01), Jackson
patent: 4477176 (1984-10-01), Russel
patent: 4509850 (1985-04-01), Weigl
patent: 4569584 (1986-02-01), St. John et al.

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