Image forming apparatus having transfer voltage and process spee

Details Image forming apparatus having transfer voltage and process spee Image forming apparatus having transfer voltage and process spee

1991-01-14

1993-10-05

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355273, 355311, 355313, G03G 1501, G03G 2100

Patent

active

052509990

ABSTRACT:
A color image forming apparatus for forming a toner image on a transparent member used in combination with overhead projectors including a speed switch for switching the process speed while an image carrier is rotating, after toner images of a number of colors are formed on the image carrier; a process control for controlling the transfer conditions under which the toner images are transferred onto the recording medium, in response to switching of the process speed; and a selector for selecting an overhead projection mode including a voltage switch for reducing voltage applied to the transfer device after a predetermined time has elapsed. Preferably, the process control includes a fixing temperature control for controlling the fixing temperature of the recording medium having the toner images transferred thereon.

REFERENCES:
patent: 3851236 (1974-11-01), Dennhardt et al.
patent: 3877416 (1975-04-01), Donohue et al.
patent: 4549803 (1985-10-01), Ohno et al.
patent: 4593992 (1986-06-01), Yoshinaga et al.
patent: 4719489 (1988-01-01), Ohkubo et al.
patent: 4928136 (1990-05-01), Kusumoto et al.
patent: 5010370 (1991-04-01), Araya et al.
patent: 5010372 (1991-04-01), Kasahara et al.
patent: 5041878 (1991-08-01), Takai et al.

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