Frishauf, Holtz, Goodman & Chick, P.C.
Image forming method and apparatus to maintain a high efficiency of toner transfer
An image forming apparatus having: an image forming body for forming a latent image and a toner image; a developing device for developing with a toner the latent image formed on the image forming body to form the toner image; a primary transfer device for transferring the toner image on the image forming body onto an intermediate transfer body; and a secondary transfer device for transferring the toner image on the intermediate transfer body onto an image support. The primary transfer device has conductive body or semi-conductive body, and is provided with a power supply unit for applying a bias voltage. It is characterized in that the variation coefficient of the shape factor of the toner is 16% or less, and the number variation coefficient of the number particle size distribution of the toner is 27% or less.
Konica Corporation
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inventional inventional inventional additional inventional
Satoshi Hiroaki Hiroshi Shigetaka Masashi
Nishida Miho Morimoto Kurosu Saito