Device for removing residual developer particles from a photoconductive member
AssigneeKentek Information Systems, Inc.
InventorsKensuke Fukae, Toshio Muramatsu
Life of this patent
Estimating the term…
Abstract
A device for removing residual particles from a photoconductive member comprises a fur brush in contact with the photoconductive member, a metal roller in contact with the fur brush, and a scraper blade in contact with the metal roller. The fur brush is maintained at a first biasing voltage, e.g., +50V, while the metal roller is maintained at a second biasing voltage which is of the same polarity but greater in magnitude than the first biasing voltage, e.g., +150V. The fur brush attracts residual particles from the photoconductive member while the metal roller attracts residual particles from the fur brush. The scraper blade scrapes the residual particles from the metal roller, the particles falling into a conveying auger for recycling.
Claims16
A cleaning device for removing residual particles from a photoconductive member in an electrographic printing apparatus, comprising
- brush means for being held in contact with a charged rotatable photoconductive member, said brush means being maintained at a first biasing voltage for attracting residual particles from said photoconductive member,
- transferring means in juxtaposition with said brush means, said transferring means being maintained at a second biasing voltage for attracting said residual particles from said brush means, said second biasing voltage being of the same polarity and greater in magnitude than said first biasing voltage,
- removal means for removing said residual particles from said transferring means, and
- discharge means for discharging said photoconductive member, said discharge means being located downstream of said brush means relative to said photoconductive member.
A cleaning device for removing residual particles from a photoconductive member in an electrographic printing apparatus, comprising
- a housing,
- a brush for being held in contact with a charged rotatable photoconductive member, said brush being maintained at a first biasing voltage to attract said residual particles from said photoconductive member,
- a metal roller in juxtaposition with said brush, said metal roller being maintained at a second biasing voltage for attracting said residual particles from said brush, said second biasing voltage being of the same polarity and greater in magnitude than said first biasing voltage,
- a scraper blade in juxtaposition with said metal roller for removing residual particles from said metal roller,
- said brush, metal roller and scraper blade being disposed inside said housing, and
- discharge means mounted on the outside of said housing for discharging said photoconductive member, said discharge means being located downstream of said brush relative to said photoconductive member.
A method for removing residual particles from a photoconductive member in an electrographic printing means, comprising
- brushing a charged photoconductive member with a brushing means while applying a first biasing voltage to said brushing means to attract residual particles from said photoconductive member,
- transferring said residual particles from said brushing means with a transferring means while applying a second biasing voltage to said transferring means to attract said residual particles from said brushing means, said second biasing voltage being of the same polarity and greater in magnitude than said first biasing voltage,
- removing said residual particles from said transferring means, and thereafter discharging said photoconductive member.
Dependencies are inferred from the claim text.