Electrophotography – Internal machine environment – Particle or contaminant control
Patent
1997-04-11
1999-01-19
Beatty, Robert
Electrophotography
Internal machine environment
Particle or contaminant control
399283, G03G 2100
Patent
active
058624406
ABSTRACT:
A system for the delivery of a substantially uniform mono-layer of toner to an electrostatic latent image in an imaging member (such as a rotating cylinder) insures proper handling of the toner, and utilizes first and second rollers which function as a polarity filter for toner, allowing only particular charged toner to be transferred from a toner reservoir to the imaging member. The twin roller delivery system comprises first and second rollers mounted for rotation about substantially parallel substantially horizontal axes, so that the peripheral surface of the first roller receives the toner from the substantially open top reservoir, and the second roller receives toner from the first roller and transfers it to the imaging member. The first and second rollers are charged to different electrical potentials, e.g. both being positive with the second roller at a potential that is about 400 volts below the first. The rollers are rotated in opposite directions about the axes of rotation. Toner scraping is provided at specific points along the first and second rollers so that any residual toner falls into the toner reservoir, and a suction system is provided adjacent the second roller both before and after its peripheral surface transfers toner to the imaging member, to remove stray toner without disturbing the substantially uniform mono-layer of toner.
REFERENCES:
patent: 4351604 (1982-09-01), Karasawa et al.
patent: 4378158 (1983-03-01), Kanbe
patent: 4508052 (1985-04-01), Kohyama
patent: 4746796 (1988-05-01), Heigi
patent: 4777106 (1988-10-01), Fotland
patent: 4984019 (1991-01-01), Folkins
patent: 5023748 (1991-06-01), Okamoto et al.
patent: 5028959 (1991-07-01), Gooray
patent: 5134442 (1992-07-01), Folkins et al.
patent: 5253016 (1993-10-01), Behe et al.
patent: 5270782 (1993-12-01), Floyd, Jr.
patent: 5321474 (1994-06-01), Bares
patent: 5337131 (1994-08-01), Sagiv et al.
patent: 5392099 (1995-02-01), Kusumoto et al.
patent: 5532100 (1996-07-01), Christy et al.
patent: 5630200 (1997-05-01), Christy
Patent Abstracts of Japan vol. 012, No. 345, 16 Sep. 1988 & JP 63 101873 A, May 1988.
Christy Orrin D.
Hook Kevin J.
Muranyi Mark A.
Beatty Robert
Moore Business Forms Inc.
LandOfFree
Toner delivery device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Toner delivery device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toner delivery device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1255540