Electrophotography – Control of electrophotography process – Control of developing
Patent
1999-10-12
2000-11-14
Grimley, Arthur T.
Electrophotography
Control of electrophotography process
Control of developing
399 62, 399254, G03G 1510, G03G 1508
Patent
active
061481610
ABSTRACT:
An image forming apparatus includes an image carrier and a developing device to develop a latent image formed on the image carrier by applying two-component developer, including toner, onto the latent image. The developing device includes a developing part containing the two-component developer and a developer stirring device to stir the two-component developer. A toner supplying device supplies toner to the developing part of the developing device, and a toner density detection device detects a toner density of the two-component developer in the developing device. A toner control device calculates a difference between an output value VT of the toner density detection device and a criterion value VTref for controlling the toner density of the two-component developer and controls the toner supplying device based upon the difference. An image density detection device detects an image density of a criterion image formed on the image carrier, and a criterion value correcting device corrects the criterion value VTref based upon an output value of the criterion image density detection device. A decision as to whether to stir the developer in the developing device with the developer stirring device is made based upon a difference between the criterion value VTref and the output value VT from the toner density detection device and an output value of the criterion image density detection device when an image forming operation is started.
REFERENCES:
patent: 4885466 (1989-12-01), Koichi et al.
patent: 5162849 (1992-11-01), Yoshino et al.
patent: 5357317 (1994-10-01), Fukuchi et al.
patent: 5581326 (1996-12-01), Ogata et al.
patent: 5678125 (1997-10-01), Kutsuwada et al.
patent: 5815767 (1998-09-01), Kutsuwada et al.
Amemiya Ken
Mizuishi Haruji
Mizusawa Hiroshi
Ohori Mayumi
Tanaka Masaru
Grimley Arthur T.
Ng Hoang
Ricoh & Company, Ltd.
LandOfFree
Image forming apparatus with improved toner density control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming apparatus with improved toner density control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus with improved toner density control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2073889