Electrophotography – Image formation – Development
Reexamination Certificate
2005-05-31
2005-05-31
Chen, Sophia S. (Department: 2852)
Electrophotography
Image formation
Development
C399S055000, C399S285000, C399S291000, C430S120400
Reexamination Certificate
active
06901231
ABSTRACT:
A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes are formed in the transporting member for generating a traveling-wave electric field to move the powder, and n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.
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Horike Masanori
Kondoh Nobuaki
Miyaguchi Yohichiro
Sakai Katsuo
Chen Sophia S.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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