Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-09-29

2000-04-18

Chen, Sophia S.

Electrophotography

Control of electrophotography process

Control of developing

399 30, 399 63, 399149, 399175, G03G 1500, G03G 1502, G03G 1509

Patent

active

060525452

ABSTRACT:
An image forming apparatus includes an image bearing member and a charging unit having magnetic particles that are contactable with the image bearing member. An electrostatic image forming unit forms an electrostatic image on the charged image bearing member. A developing device develops an electrostatic image on the image bearing member with toner that includes toner and magnetic carrier. A detecting unit detects the toner content of the developer and a toner supply unit supplies the toner into the developing unit when the detected toner content is lower than a predetermined level. A calculating unit calculates the changing rate of the toner content from an output of the detecting unit and a warning unit warns that a changing rate of the toner content is larger than a predetermined level.

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patent: 5822659 (1998-10-01), Ishiyama
patent: 5870656 (1999-02-01), Hibino et al.
patent: 5890038 (1999-03-01), Ohsawa et al.

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