Electrophotography – Image formation – Development
Reexamination Certificate
2007-01-30
2007-01-30
Chen, Sophia S. (Department: 2852)
Electrophotography
Image formation
Development
C399S267000, C399S275000, C430S110400
Reexamination Certificate
active
11349244
ABSTRACT:
A method of developing a latent image formed on an image carrier with toner, including causing a developer carrier, which faces the image carrier and accommodates a magnet therein, to support a developer having a toner and a magnetic carrier supporting the toner and convey the developer to a developing zone between the developer carrier and the image carrier, and providing an apparent coating ratio M of a surface of the developer carrier coated with the developer. The coating ration M is, in a zone upstream of the developing zone in a direction of rotation of the developer carrier, expressed as M=αA2+β (%), where α denotes a coefficient of the coating ratio, A2 denotes an amount of developer for a unit area, β denotes a value determined by a powder characteristic of the developer for an apparent coating ratio calculated with A2=0, and the coating ratio M is between 90% and 120%.
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Koike Takayuki
Oyama Hajime
Takagaki Hiromitsu
Takeuchi Nobutaka
Chen Sophia S.
Ricoh & Company, Ltd.
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