Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1990-09-26
1992-12-29
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
355265, G03G 1308
Patent
active
051750708
ABSTRACT:
An image forming apparatus is formed by providing a latent image-bearing member for holding an electrostatic image thereon and a toner-carrying member for carrying a prescribed magnetic toner comprising a binder resin and magnetic powder and having a particle size distribution including 12% by number or more of magnetic toner particles of 5 microns or smaller, 33% by number or less of magnetic toner particles of 8-12.7 microns and 2% by volume or less of magnetic toner parcitles of 16 microns or larger so as to provide a volume-average particle size of 4-10 microns. At the developing station, an alternating bias voltage comprising a DC voltage and an unsymmetrical AC voltage in superposition is applied between the toner-carrying member and the latent image-bearing member to provide an alternating bias electric field comprising a development-side voltage component and a reverse-development side voltage component. The development-side voltage component has a magnitude equal to or larger than that of the reverse development-side voltage component and a duration smaller than that of the reverse-development side voltage component, so that the magnetic toner on the toner-carrying member, particularly fine powdery fraction thereof effective for high-quality development, is effectively transferred to the latent image-bearing member to develop the electrostatic image thereon at the developing station.
REFERENCES:
patent: 2297691 (1939-04-01), Carlson
patent: 3405682 (1968-10-01), King et al.
patent: 3666363 (1971-02-01), Tanaka et al.
patent: 3776722 (1973-12-01), Cantarano
patent: 3866574 (1975-02-01), Hardennrook et al.
patent: 3890929 (1975-06-01), Walkup
patent: 3893418 (1975-07-01), Liebman et al.
patent: 4071361 (1978-01-01), Marushima
patent: 4380966 (1983-04-01), Isaka et al.
patent: 4386577 (1983-06-01), Hosono et al.
patent: 4395476 (1983-07-01), Kanbe et al.
patent: 4444864 (1984-04-01), Takahashi
patent: 4565438 (1986-01-01), Folkins
patent: 4600295 (1986-07-01), Suzuki
patent: 4688923 (1987-08-01), Kohyama
patent: 4827869 (1989-05-01), Takagi
patent: 4904558 (1990-02-01), Nagatsuka et al.
patent: 4957840 (1990-09-01), Sakashita et al.
patent: 4978597 (1990-12-01), Nakahara
patent: 4985327 (1991-01-01), Sakashita et al.
patent: 4992348 (1991-02-01), Hayakawa et al.
patent: 5009973 (1991-04-01), Yoshida et al.
patent: 5014089 (1991-05-01), Sakashita et al.
Akashi Yasutaka
Kobayashi Kuniko
Tanikawa Hirohide
Taya Masaaki
Uchiyama Masaki
Canon Kabushiki Kaisha
McCamish Marion E.
Rodee Christopher D.
LandOfFree
Image forming method and image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming method and image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming method and image forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1886380