Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-03-15

2011-03-15

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S055000, C399S270000, C399S285000

Reexamination Certificate

active

07907855

ABSTRACT:
An image forming apparatus including a first developing device including a first developer carrying member for carrying a developer containing toner, wherein a developing voltage including an AC component is applicable to the first developer carrying member to develop an electrostatic image; a second developing device including a second developer carrying member for carrying a developer containing toner, wherein a developing voltage including an AC component is applicable to the second developer carrying member to develop an electrostatic image; a transferring device for transferring a toner image formed by the first developing device to a moving transfer medium and then transferring a toner image formed by the second developing device onto the transfer medium; a controller for selectively executing an operation in a first mode wherein the image is formed by both of the first developing device and the second developing device or in a second mode wherein the image is formed by only the second developing device of the developing devices; wherein the second developing device is capable of developing operation with the developing voltage having the AC component which is smaller in amplitude in the first mode than in the second mode.

REFERENCES:
patent: 5784668 (1998-07-01), Hyakutake et al.
patent: 6553192 (2003-04-01), Maebashi
patent: 7058326 (2006-06-01), Toyama
patent: 7266315 (2007-09-01), Sato
patent: 2004/0136742 (2004-07-01), Saito et al.
patent: 2006/0251432 (2006-11-01), Shibata
patent: 2007/0020545 (2007-01-01), Bossidan et al.
patent: 9-230693 (1997-09-01), None
patent: 2001-188394 (2001-07-01), None
patent: 2002268322 (2002-09-01), None
patent: 2003-255663 (2003-09-01), None

Affiliated with

Also associated with

Rating

Image forming apparatus 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2645567