Photocopying – Contact printing – Light boxes
Patent
1991-01-22
1993-01-12
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118656, 355246, G03G 1506
Patent
active
051794144
ABSTRACT:
An apparatus for developing an image on a photoconductive surface. The apparatus includes a roller positioned adjacent to the photoconductive surface. Negatively charged toner is supplied to the surface of the first roller where the toner electrostatically adheres, either in a uniform layer or a variable layer, to the surface of the first roller. The negatively charged toner electrostatically adhered to the surface of the firt roller is then transferred to the photoconductive surface. The apparatus may also include a second roller held at a positive charge relative to the first roller for electrostatically transferring toner from the second roller to the first roller. Alternately, the positive charge on the second roller relative to the first roller may be produced by placing a negative charge on the first roller or by placing a negtive charge on the second roller and a more negative charge on the second roller. By placing a negative charge on the second roller, the toner will also be negatively charged before transfer to the first roller.
REFERENCES:
patent: Re30924 (1982-05-01), Katayama et al.
patent: 3859691 (1975-01-01), Katayama et al.
patent: 3985436 (1976-10-01), Tanaka et al.
patent: 4100884 (1978-07-01), Mochizuki et al.
patent: 4514480 (1985-04-01), Wada et al.
patent: 4538896 (1985-09-01), Tajima et al.
patent: 4575221 (1986-03-01), Onoda et al.
patent: 4686934 (1987-08-01), Kohyama
patent: 4699494 (1987-10-01), Honda
patent: 4714337 (1987-12-01), Nishino et al.
patent: 4822711 (1989-04-01), Itaya et al.
patent: 4829335 (1989-05-01), Kanemitsu et al.
patent: 4835565 (1989-05-01), Nagatsuna et al.
patent: 5012289 (1991-04-01), Aldrich et al.
patent: 5049471 (1991-09-01), Higashiguchi et al.
Compag Computer Corporation
Grimley A. T.
Royer William J.
LandOfFree
Apparatus for developing an image on a photoconductive surface does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for developing an image on a photoconductive surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for developing an image on a photoconductive surface will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1223306