Image forming apparatus and method with control of electrostatic

Details Image forming apparatus and method with control of electrostatic Image forming apparatus and method with control of electrostatic

1997-12-29

1999-08-10

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Control of transfer

399 46, 399 49, 399 60, 399 72, G03G 1501

Patent

active

059372290

ABSTRACT:
An electrostatographic recording apparatus and method includes a primary charger that establishes a uniform electrostatic charge on the image recording member in accordance with a first operating parameter. A recording device that imagewise modulates the charge on the image recording member to form electrostatic images in accordance with a second operating parameter and additionally forms a developable process control patch. A development station develops the electrostatic images and the control patch on the image recording member with toner in accordance with a third operating parameter. A transfer station transfers developed images from the image recording member. The transfer station includes a transfer member and power supply providing to the transfer member a transfer current used for transferring developed images. In one embodiment a sensor senses density of the developed control patch. A controller in response to density of the control patch provides adjustments to the first, second and third operating parameters and controls the power supply to provide to the transfer member transfer current as a function of a parameter related to one of the first, second or third operating parameters. In other embodiments transfer current can be determined in response to other more direct measures of charge to mass ratio in the development station.

REFERENCES:
patent: 3781105 (1973-12-01), Meagher
patent: 4026643 (1977-05-01), Bergman
patent: 4473029 (1984-09-01), Fritz et al.
patent: 4546060 (1985-10-01), Miskinis et al.
patent: 5036360 (1991-07-01), Paxon et al.
patent: 5084737 (1992-01-01), Hagen et al.
patent: 5235388 (1993-08-01), Rimai et al.
patent: 5253934 (1993-10-01), Potucek et al.
patent: 5257039 (1993-10-01), Chung et al.
patent: 5300960 (1994-04-01), Pham et al.
patent: 5416564 (1995-05-01), Thompson et al.
patent: 5459555 (1995-10-01), Yamasa et al.
patent: 5568228 (1996-10-01), Tombs
patent: 5598252 (1997-01-01), Yamasa et al.
patent: 5640645 (1997-06-01), Namekata et al.
patent: 5649266 (1997-07-01), Rushing
patent: 5678131 (1997-10-01), Alexandrovich et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1129534