Electrophotographic image forming apparatus including a developing roller for a developing unit using non-magnetic mono-component toner, and developing method using the same
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United States of America Patent
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Jun 2, 2009
Grant Date -
Nov 16, 2006
app pub date -
Mar 8, 2006
filing date -
May 16, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An electrophotographic image forming apparatus is provided which includes an image receptor on which an electrostatic latent image is formed. A developing unit develops the electrostatic latent image by supplying non-magnetic mono-component toner to the electrostatic latent image and includes a developing roller which faces the image receptor. A trail type regulating blade is installed to form a uniform toner layer on the developing roller. In the electrophotographic image forming apparatus, the rate of the amount of toner particles having a diameter of not more than about half of a median value of a volume-diameter distribution of the toner is not more than about 15% in a number-diameter distribution.
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