Title:
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/1998/006012
Kind Code:
A1
Abstract:
A toner image is formed on an electrophotograph photosensitive body by a developing means in which toner powder is stored. The toner image is transferred onto a transfer material and the image is outputted. The toner powder which remains on the electrophotograph photosensitive body after the transfer is recovered by the developing means which also functions as a cleaning means. The material of the surface of the electrophotograph photosensitive body is positive-chargeable organic photosensitive material which contains a phthalocyanine compound as a charge generating agent, a diphenoquinone compound as an electron transporting agent and a nitrogen-containing polyaromatic cyclic compound as a positive hole transporting agent. The toner powder has a sphericity which is calculated by dividing the area (Sc) of a circle whose diameter is the absolutely maximum length of the particles by the actual projection area (Sr) of the particles, within a range of 1.0-1.3 and is colored polymer particles produced by a suspension polymerization method.
Inventors:
MAKUTA YOSHIHIRO (JP)
IMAI TOYOKO (JP)
IMAI TOYOKO (JP)
Application Number:
PCT/JP1997/002734
Publication Date:
February 12, 1998
Filing Date:
August 06, 1997
Export Citation:
Assignee:
NIPPON ZEON CO (JP)
MAKUTA YOSHIHIRO (JP)
IMAI TOYOKO (JP)
MAKUTA YOSHIHIRO (JP)
IMAI TOYOKO (JP)
International Classes:
G03G5/043; G03G9/08; G03G21/00; (IPC1-7): G03G15/08; G03G5/06; G03G9/08; G03G15/02; G03G15/16
Foreign References:
| JPH0588534A | 1993-04-09 | |||
| JPH0553354A | 1993-03-05 | |||
| JPH0777815A | 1995-03-20 | |||
| JPH05188637A | 1993-07-30 | |||
| JPH03259161A | 1991-11-19 |
Attorney, Agent or Firm:
Nishikawa, Shigeaki (401 43-8, Higashi-Nippori 3-chom, Arakawa-ku Tokyo 116, JP)
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