Title:
DEVELOPING DEVICE, CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2002116675
Kind Code:
A
Abstract:
To always obtain a good image even after a printing action of a great number of times regardless of an operation environment of a developing device.
In the developing device, the operation environment of the developing device 5 is detected by a comparing member 20, the detection result is inputted to CPU 50 and discrimination into 3 environments of low humidity, normal and high humidity or small amount of toner is carried out. A scraping off roll 12 is driven by a scraping off roll driving means 40 according to the environment at each rotational speed of V1, V2 or V3 (V1>V2>V3).
Inventors:
KOJIMA KATSUHIRO
Application Number:
JP2000307566A
Publication Date:
April 19, 2002
Filing Date:
October 06, 2000
Export Citation:
Assignee:
CANON KK
International Classes:
G03G21/14; G03G15/08; (IPC1-7): G03G21/14; G03G15/08
Attorney, Agent or Firm:
Kurahashi Akira