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Inventor:
Kawahara; Masataka
Address:
Mishima, JP
No. of patents:
12
Patents:












Patent Number Title Of Patent Date Issued
8088541 Polyvinyl acetal resin, electrophotographic photosensitive member, process cartridge, and electr January 3, 2012
The present invention relates to a polyvinyl acetal resin having a specific repeating structural unit, an electrophotographic photosensitive member using the polyvinyl acetal resin, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photo
7749667 Image forming method, and electrophotographic apparatus making use of the image forming method July 6, 2010
An image forming method is disclosed having a charging step, an exposure step, a developing step and a transfer step. This method uses a toner which includes toner particles containing a binder resin and a colorant, and inorganic fine powder, and uses a photosensitive member which has on
7718331 Electrophotographic photosensitive member with depressed portions, process cartridge holding the May 18, 2010
An electrophotographic photosensitive member is disclosed which is excellent in cleaning performance, has improved durability, and suppresses image defects in various environments. The electrophotographic photosensitive member has a support and a photosensitive layer provided on the
7629102 Method for preparing electrophotographic photosensitive member December 8, 2009
A method for preparing in high productivity and stably an electrophotographic photosensitive member having depressed portions on its surface, is provided. The method is characterized in that a coating liquid for a surface layer which includes a solvent including a hydrophilic solvent
7622238 Process for producing electrophotographic photosensitive member November 24, 2009
A process for producing an electrophotographic photosensitive member, which has the step of bringing i) the surface of an electrophotographic photosensitive member having at least a charge transport layer on a cylindrical support and ii) a mold having a fine unevenness surface profil
7556901 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus July 7, 2009
An electrophotographic photosensitive member has a surface having a plurality of depressed portions, having a major-axis diameter Rpc of 0.1 to 10 .mu.m, a minor-axis diameter Lpc of 0.1 to 10 .mu.m and a deepest-part to opening distance Rdv of 0.1 to 10 .mu.m. Where the surface is e
7551878 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus June 23, 2009
An electrophotographic photosensitive member has, on the surface of its photosensitive layer, has a plurality of depressed portions which are independent from one another, and, where the major-axis diameter of each depressed portion is represented by Rpc and the depth that shows the
7333752 Electrophotographic photosensitive member, and process cartridge and electrophotographic apparat February 19, 2008
An electrophotographic apparatus is disclosed using an electrophotographic photosensitive member which employs light with a short wavelength (380 nm to 500 nm) as image exposure light and is good in photoelectric conversion efficiency on the whole at that wavelength. The electrophoto
7160659 Electrophotographic apparatus and process cartridge January 9, 2007
An electrophotographic apparatus adopts a contact development system as a development system, which hardly causes toner fusion, and which hardly causes fogging in an output image; and a process cartridge is detachably attached to a main body of the electrophotographic apparatus. Spec
7097950 Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus August 29, 2006
An electrophotographic photosensitive member capable of outputting an image in which a defect such as a ghost is suppressed even in a high-temperature-and-high-humidity environment, and in which a defect such as a change in density due to an abrupt change in light-area potential at a
6623899 Electrophotographic photosensitive member, process for production thereof, process cartridge and September 23, 2003
An electrophotographic photosensitive member exhibiting good potential characteristic and image forming characteristic fee from difficulties, such as lower image density, black spots and fog or interference fringes in halftone images, over wide temperature and humidity environment co
6551752 Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus April 22, 2003
An electrophotographic photosensitive member exhibiting good potential characteristic and image forming characteristic fee from difficulties, such as lower image density or black spots and fog, over wide temperature and humidity environment condition, is provided by inserting a specific










 
 
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