Image forming apparatus

Details Image forming apparatus Image forming apparatus

1988-02-26

1989-12-12

Braun, Fred L.

Recorders

Electric recording

Electrochemical

355246, 355328, G03G 1501, G01D 1506

Patent

active

048871028

ABSTRACT:
An image forming apparatus includes a first developing device for forming a first toner image and a second developing device for forming a second toner image including a developer carrying member spaced apart from the image bearing member by a distance and a device for applying a developing bias voltage to form an electric field having a maximum voltage Vmax and a minimum voltage Vmin, such that when the first developer is positively charged,

REFERENCES:
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4349268 (1982-09-01), Hirata
patent: 4416533 (1983-11-01), Tokunaga et al.
patent: 4572651 (1986-02-01), Komatsu et al.
patent: 4660961 (1987-04-01), Kuramoto et al.

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