Photocopying – Contact printing – Light boxes
Patent
1992-09-10
1994-02-01
Picard, Leo P.
Photocopying
Contact printing
Light boxes
118658, 355215, 430122, G03G 1509
Patent
active
052836177
ABSTRACT:
An electrophotographic printing machine in which an electrostatic latent image is recorded on a moving photoconductive surface by charging the appropriate areas of the surface to predetermined polarities. The latent image is a developed in a development zone with toners of a preselected color and predetermined polarity which are delivered by magnetic bead carriers. A bead removal device is provided adjacent the surface and downstream from the development zone relative to the movement of the surface. The bead removal device magnetically attracts carrier beads off the photoconductive surface. The beads are then deposited in a sump. A vacuum source is also provided for urging beads into the sump from the surface. The bead removal device comprising a sleeve mounted for rotation in a housing, adjacent the surface. The sleeve has a fixed magnet disposed proximate the surface therein and a shunt disposed generally opposite the magnet to define an attraction zone and a release zone. The vacuum source has a port proximate the release zone for drawing beads thereto and the housing can be ultimately formed to have a large aperture or relatively small aperture to urge beads on and near the photoconductive surface to the small aperture.
REFERENCES:
patent: 3807853 (1974-04-01), Hudson
patent: 4067018 (1978-01-01), Pond
patent: 4078929 (1978-03-01), Gundlach
patent: 4260235 (1981-04-01), Stack
patent: 4292924 (1981-10-01), Lindblad et al.
patent: 4320958 (1982-03-01), Fantuzzo
patent: 4378754 (1983-04-01), Raseuchi et al.
patent: 4439034 (1984-03-01), Daniels
patent: 4466730 (1984-08-01), Jugle
patent: 4517719 (1985-05-01), Okumura et al.
patent: 4640808 (1987-02-01), Okumura et al.
patent: 4641946 (1987-02-01), Forbes, II
patent: 4721661 (1988-01-01), Olson et al.
patent: 4797708 (1989-01-01), Kaiske, Jr. et al.
patent: 4811046 (1989-03-01), May
patent: 4829338 (1989-05-01), Whittaker et al.
patent: 4833504 (1989-05-01), Parker et al.
patent: 4878089 (1989-10-01), Guslits et al.
patent: 4972231 (1990-11-01), Bares
patent: 4996538 (1991-02-01), Brecy et al.
patent: 5052336 (1991-10-01), Fukuchi
patent: 5063412 (1991-11-01), Hirsch
patent: 5138382 (1992-08-01), Van Duser et al.
patent: 5138388 (1992-08-01), Kamp et al.
Alvarez Jorge A.
Benedict Lawrence R.
Denton Gary A.
Zirilli Francisco
Horgan Christopher
Picard Leo P.
Xerox Corporation
LandOfFree
Development apparatus employing magnetic field shapers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Development apparatus employing magnetic field shapers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Development apparatus employing magnetic field shapers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-583038