Method and apparatus for controlling the sequence, size and posi

Details Method and apparatus for controlling the sequence, size and posi Method and apparatus for controlling the sequence, size and posi

1996-09-30

1998-10-20

Pendegrass, Joan H.

Electrophotography

Control of electrophotography process

Forming test image

347900, G03G 1500

Patent

active

058261397

ABSTRACT:
A method and apparatus for reproducing high quality images using an electrophotographic printing machine is disclosed.
More specifically, the present invention is used to change the location, shape and size of a process control patch. Process control patches may be used to improve the quality of an image prior to printing. The intensity of light reflected from the control patch is measured, and the measurements are used to change parameters such as magnitude of electrostatic charge, and toner concentration, before the latent image developed. Adjusting these parameters at this time will allow the printing apparatus to reproduce images having superior quality than previously available.

REFERENCES:
patent: 4949105 (1990-08-01), Prowak
patent: 4999673 (1991-03-01), Bares
patent: 5060013 (1991-10-01), Spence
patent: 5227270 (1993-07-01), Scheuer et al.
patent: 5300983 (1994-04-01), Paxon
patent: 5416563 (1995-05-01), Magde, Jr.
patent: 5450165 (1995-09-01), Henderson
patent: 5463455 (1995-10-01), Pozniakas et al.

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