Reduction of banding and mottle in electrophotographic systems

Details Reduction of banding and mottle in electrophotographic systems Reduction of banding and mottle in electrophotographic systems

2005-04-26

2005-04-26

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S049000

Reexamination Certificate

active

06885833

ABSTRACT:
A mechanism and process for detecting mottle or banding in a developed electrophotographic image. Within an electrophotographic reproduction apparatus10, a photoconductor is used for receiving and developing a latent image. The photoconductor traverses a path that passes a charging station28, an exposure station34, a toning station38, and a transfer station46. Either a densitometer76for measuring the density of the developed image on the photoconductor, or an electrometer50aor50bfor detecting the voltage of the image on the photoconductor, detects mottle or banding on the developed image. The densitometer76or electrometer50aor50bhas an aperture small enough to detect mottle or banding with wavelengths perceptible by human eyes. A logic and control unit24averages the image density or voltage measurements, calculates the variations of the measurements about the average and the periodicities of the measurements, and if the variations or periodicities indicate mottle or banding is present, changes the operation of one or more stations to reduce mottle or banding.

REFERENCES:
patent: 4602863 (1986-07-01), Fritz et al.
patent: 5376492 (1994-12-01), Stelter et al.
patent: 5652946 (1997-07-01), Scheuer et al.
patent: 5853941 (1998-12-01), Rimai et al.
patent: 5937229 (1999-08-01), Walgrove et al.
patent: 5946521 (1999-08-01), Budnik et al.
patent: 6121986 (2000-09-01), Regelsberger et al.
patent: 6275600 (2001-08-01), Banker et al.
patent: 6529616 (2003-03-01), Rasmussen et al.
patent: 6571000 (2003-05-01), Rasmussen et al.
patent: 6606395 (2003-08-01), Rasmussen et al.
patent: 09204117 (1997-08-01), None
Opek Technology, Inc., 1215 W. Crosby Road, Carrollton, Texas 75006 Product Bulletin OP913SL, Jun. 1996, PIN Silicon Photodiodes Types OP913SL, OP913WSL.

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