Electrophotography – Diagnostics – By inspection of copied image
Reexamination Certificate
2006-06-13
2006-06-13
Chen, Sophia S. (Department: 2852)
Electrophotography
Diagnostics
By inspection of copied image
C399S049000, C399S055000
Reexamination Certificate
active
07062180
ABSTRACT:
An image forming device having a developing unit for visualizing an electrostatic latent image formed on an image carrying body by utilizing a developing agent containing toners and carriers which transfers a toner image to a recording medium to obtain a record image. A patch sensor is provided for detecting the image density of the record image, and it controls toner density stabilization control and an adjustment value and bias voltage in the developing unit according to a value detected by the patch sensor and a value of current flowing in the image carrying body from the developing unit. Thereby, an image forming device is provided which performs stable image density control when a problem is caused during processing of a predetermined number of printing pages, even when a deterioration of the image due to an abnormal property change of a developing agent is caused.
REFERENCES:
patent: 4786924 (1988-11-01), Folkins
patent: 5576811 (1996-11-01), Kobayashi et al.
patent: 5887223 (1999-03-01), Sakai et al.
patent: 5966561 (1999-10-01), Yamaguchi
patent: 2004/0018025 (2004-01-01), Park et al.
patent: 04-034573 (1992-02-01), None
patent: 04-319972 (1992-11-01), None
patent: 05-323789 (1993-12-01), None
patent: 2002-23436 (2002-01-01), None
Antonelli, Terry Stout and Kraus, LLP.
Chen Sophia S.
Ricoh Printing Systems Ltd.
LandOfFree
Image forming device with image 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 device with image density control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming device with image density control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3699208