Deveoloping unit switching device for a printer

Details Deveoloping unit switching device for a printer Deveoloping unit switching device for a printer

1989-01-23

1991-06-18

Moses, R. L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

355245, 355328, H04N 129, G03G 1501, G03G 1506

Patent

active

050253239

ABSTRACT:
An improved developing unit switching device for a printer capable of providing a multicolor copy from one formation of latent electrostatic images comprises a photoreceptor drum on which the latent electrostatic images are formed; a rotary encoder for detecting an amount of rotation of the photoreceptor drum; developing units containing toner of at least two colors for providing multicolor copies; and a switching apparatus for switching the respective developing units. The improved device switches respective developing units in response to an output signal from the rotary encoder.

REFERENCES:
patent: 3917396 (1975-11-01), Donohue et al.
patent: 4260242 (1981-04-01), Nishikawa
patent: 4733269 (1988-03-01), Kasahara et al.
patent: 4777510 (1988-11-01), Russel
patent: 4885611 (1989-12-01), Higashio et al.

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