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Class 399/230 - By diverting toner


Subclass of Class 399 - Electrophotography
Definition: Subject matter wherein the selective activation means includes
No. of patents: 15
Last issue date: 04/03/2007


NumberTitleIssue Date
7199898Developing device and image forming apparatus
A developing device including: a first developer carrying member for carrying a developer to develop a latent image formed on an image bearing member; a first regulating member, disposed on one end of a longitudinal direction of the image bearing member, for regulat...
04/03/2007
6928254Apparatus and method of forming multi-color images
A color image forming apparatus includes a photoreceptor medium, an exposing unit, a plurality of developer units, and a power supply. The exposing unit scans light onto the photoreceptor drum to form a latent electrostatic image. The plurality of developer units in...
08/09/2005
6915086Device for increasing the density of laser prints
A device for increasing the image density of laser prints includes a machine, a rolling mechanism and a driving mechanism; wherein the machine is disposed with a paper inlet and a paper outlet; the rolling mechanism and the driving mechanism are disposed inside the ...
07/05/2005
5327199Developing device for a color image forming apparatus
A developing device for an electrophotographic color image forming apparatus and having a plurality of developing units each storing a two-component developer of particular color. In each developing unit, to bring the developer deposited on a developing s...
07/05/1994
5095340Method of controlling the operation of a magnetic brush toning station
A toning station having an applicator with a rotatable component and a mixing device directly below it in a chamber are both rotated to tone an electrostatic image. To not tone an electrostatic image that is passing the applicator, the mixing device is no...
03/10/1992
5077578Development system
An apparatus which develops an electrostatic latent image recorded on a photoconductive member with toner. The toner in the chamber of the developer housing is fluidized and transported thereacross by an elongated member. A donor roller advances the toner...
12/31/1991
5020471Developing unit
A developing unit including: a developing roller disposed in a developer tank in a location facing a recording medium; a supply passage for supplying developer to the developing roller; a shut-off device that is rotatable about the center axis thereof for...
06/04/1991
4982691Developing device for electrophotographic apparatus having magnet rollers
A developing device for an electrophotographic apparatus includes a developing magnet roller, a transfer magnet roller and a separator for separating these rollers. Each of these rollers has a sleeve which is rotatably fitted around a columnar magnet piec...
01/08/1991
4914481Developing apparatus
A developing apparatus which includes a developing section disposed to confront a recording medium for effecting development, and a device for supplying developing material to the developing section. The developing device is characterized in that there is...
04/03/1990
4839688Development apparatus
An apparatus in which a latent image recorded on a photoconductive member is developed with developer material. A developer roller, positioned closely adjacent to the photoconductive member, is arranged to transport the developer material into contact wit...
06/13/1989
4801972Image forming apparatus equipped with a plurality of developing units
An electrophotographic image forming apparatus capable of bringing one developing unit among a plurality of developing units thereof into an operative state. To accomplish the developing unit changeover operation in the least necessary time, control means...
01/31/1989
4746954Image forming apparatus with toner scattering control
The present invention relates to an image forming apparatus having a plurality of developing units, one of which is selectively used for development. The image forming apparatus of the present invention provides for removing the toner intruding into the o...
05/24/1988
4691663Developing device
A developing device is opposed to a photosensitive drum which is rotated in one direction, and develops a latent image formed on the photosensitive drum. The developing device is provided with a first developing roller which is rotatably arranged to oppos...
09/08/1987
4422405Color electrostatographic apparatus
A single magnetic brush developing unit is disposed adjacent to a photoconductive drum for applying toner thereto. Three applicator units are selectively actuatable to apply three toners of respective primary colors to the developing unit....
12/27/1983
4352552Multicolor development system for electrophotographic printing machines
An apparatus which develops a latent image. At least two differently colored developer materials are transported to a position closely adjacent to the latent image. One of the developer materials is selectively removed from the region of the latent image....
10/05/1982
 
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