Electrophotography – Image formation – Development
Reexamination Certificate
2006-11-21
2006-11-21
Beatty, Robert (Department: 2852)
Electrophotography
Image formation
Development
C399S277000, C430S122520
Reexamination Certificate
active
07139517
ABSTRACT:
A developing method of the present invention develops a latent image formed on an image carrier with a two-ingredient type developer, which consists of toner grains and carrier grains retaining the toner grains thereon, deposited on a developer carrier in the form of brush chains. Assume that the brush chains on the developer carrier has a height of h as measured at a zero field point where the magnetic field formed by a main magnet is zero, and that a gap for development that is the shortest distance between the developer carrier and the image carrier is a, then a and h are equal to each other. Image quality is estimated by varying the combination of an angle θ between the gap and the zero field point, the outside diameter of the image carrier and the outside diameter of the developer carrier and the height h. A desirable or an optimum range of the results of estimation are selected to set various conditions.
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Patent Abstracts of Japan, JP 7-140730, Jun. 2, 1995.
Enoki Shigekazu
Maruta Takayuki
Beatty Robert
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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