Title:
IMAGE-FORMING APPARATUS AND CARTRIDGE
Document Type and Number:
WIPO Patent Application WO/2008/153105
Kind Code:
A1
Abstract:
An image-forming apparatus and a cartridge which inhibit troubles attributable
to toner particle size distribution or toner/photoreceptor matching, such
as a white-background fouling, afterimage, scattering, streaks, blurring,
and blind spots, and are satisfactory with respect to image quality, thin-line
reproducibility, and cleanability. Even when applied to a high-speed printer,
the apparatus and cartridge can prevent fouling and selective development in
long-term use and can stably form high-resolution images. The image-forming
apparatus has an electrophotographic photoreceptor which includes a photosensitive
layer containing an oxytitanium phthalocyanine which has major diffraction
peaks for a CuKα line at Bragg angles (2θ) of 9.0° and 27.2°
and has at least one major diffraction peak for the line in the range of from 9.3°
to 9.8°. It employs a toner satisfying all of the following requirements:
(1) the volume median diameter (Dv50) is 4.0-7.0 µm; (2) the average roundness
is 0.93 or higher; and (3) the volume median diameter (Dv50) and the percentage
by number of toner particles having a size of 2.00-3.56 µm (Dns) satisfy
the relationship Dns≤0.233EXP(17.3/Dv50).
Inventors:
WADA MITSUO (JP)
MITSUMORI TERUYUKI (JP)
TAKAMURA HIROAKI (JP)
OOTA MASAYA (JP)
SENOKUCHI TERUKI (JP)
SANO SHIHO (JP)
SUGIHARA MASAKAZU (JP)
YASUTOMI SHIRO (JP)
HIRABARU YUMI (JP)
OOWADA TAKESHI (US)
MITSUMORI TERUYUKI (JP)
TAKAMURA HIROAKI (JP)
OOTA MASAYA (JP)
SENOKUCHI TERUKI (JP)
SANO SHIHO (JP)
SUGIHARA MASAKAZU (JP)
YASUTOMI SHIRO (JP)
HIRABARU YUMI (JP)
OOWADA TAKESHI (US)
Application Number:
PCT/JP2008/060791
Publication Date:
December 18, 2008
Filing Date:
June 12, 2008
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
WADA MITSUO (JP)
MITSUMORI TERUYUKI (JP)
TAKAMURA HIROAKI (JP)
OOTA MASAYA (JP)
SENOKUCHI TERUKI (JP)
SANO SHIHO (JP)
SUGIHARA MASAKAZU (JP)
YASUTOMI SHIRO (JP)
HIRABARU YUMI (JP)
OOWADA TAKESHI (US)
WADA MITSUO (JP)
MITSUMORI TERUYUKI (JP)
TAKAMURA HIROAKI (JP)
OOTA MASAYA (JP)
SENOKUCHI TERUKI (JP)
SANO SHIHO (JP)
SUGIHARA MASAKAZU (JP)
YASUTOMI SHIRO (JP)
HIRABARU YUMI (JP)
OOWADA TAKESHI (US)
International Classes:
G03G9/08; G03G5/06; G03G9/087
Domestic Patent References:
| WO2004083964A1 | 2004-09-30 | |||
| WO2004088431A1 | 2004-10-14 |
Foreign References:
| JP2000330307A | 2000-11-30 | |||
| JP2004029426A | 2004-01-29 | |||
| JP2006293311A | 2006-10-26 | |||
| JP2003255567A | 2003-09-10 | |||
| JP2005077461A | 2005-03-24 | |||
| JP2006301594A | 2006-11-02 | |||
| JP2007114649A | 2007-05-10 | |||
| JP2006343486A | 2006-12-21 | |||
| JP2001337472A | 2001-12-07 | |||
| JP2007114462A | 2007-05-10 | |||
| JP2000089492A | 2000-03-31 | |||
| JP2005010527A | 2005-01-13 | |||
| JP2004220005A | 2004-08-05 | |||
| JP2001281973A | 2001-10-10 | |||
| JP2006072386A | 2006-03-16 | |||
| JPS5767940A | 1982-04-24 | |||
| JP2003186225A | 2003-07-03 |
Attorney, Agent or Firm:
SANADA, Tamotsu (10-31 Kichijoji-honcho 1-chom, Musashino-shi Tokyo 04, JP)
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