Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-01-25

2011-01-25

Porta, David P (Department: 2884)

Electrophotography

Control of electrophotography process

Control of developing

C399S285000

Reexamination Certificate

active

07877030

ABSTRACT:
An image forming apparatus includes a developer carrying member to which a developing bias is applied. A frequency f of a developing bias waveform, a developing area S1which is a time-integrated value of a difference between a voltage value of the developing bias and a solid electrostatic image potential VL in a developing period of the developing bias, a collecting area S2which is a time-integrated value of a difference between the voltage value of the developing bias and VL in a collecting period of the developing bias, and a developing contrast value Vcon are used for defining a range of a value of the developing bias frequency f, a range of a value of a voltage change rate α at VL during transition of the developing bias voltage value from a developing-side voltage to a collecting-side voltage, and a range of a value represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?{(S1−1.28×S2)×f/Vcon}×exp(−2.0×10−5×f/Hz).in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 5532801 (1996-07-01), Mizoguchi
patent: 5532803 (1996-07-01), Yasuda et al.
patent: 5724633 (1998-03-01), Amemiya
patent: 2000-056547 (2000-02-01), None
Search Report dated Nov. 16, 2009, 5 pages in EP09167377.2-2209.

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-2658772