Konica Corporation

Konica Minolta Business Technologies, Inc.

Hirohiko Seki

Nobuaki Kobayashi

Hiroshi Yamazaki

Yoko Yamamoto

Tadaaki Sumitani

Tomoo Sakimura

Akira Ohira

Junji Ujihara

Makoto Kon

Daisaku Tsuji

An electrophotographic image forming method is disclosed. The method includes electrically charging a photoreceptor, imagewise exposing the photoreceptor so that a latent image is formed on the photoreceptor, supplying a lubricant on a surface of the photoreceptor, and developing the latent image with a toner so that a toner image is formed on the photoreceptor, transferring the toner image and cleaning the photoreceptor, in which the photoreceptor has an electro-conductive substrate, a photosensitive layer and a protective layer containing inorganic particles, a ratio RSm/Dof an average length of surface roughness profile element in the direction making a right angle with the driving direction of the photoreceptor RSm (&#x3bc;m) to a number-based median diameter of the toner Dis from 0.4 to 2.0, and a skewness of the surface roughness profile of the photoreceptor in the direction making a right angle with the driving direction of the photoreceptor Rsk is from &#x2212;3.0 to 0.0.

Image forming method

A surface abrading method of an electrophotographic photoreceptor is disclosed, comprising abrading the surface of a photosensitive layer with an abrading member entrained about a backup roll with feeding the abrading member and rotating the photoreceptor, while moving the abrading member parallel to a rotating shaft of the photoreceptor with bringing the abrading member into contact with the photosensitive layer surface, wherein the abrading member comprises a solid body on a backing material, the solid body contains abrasive grains and is provided on the backing material brought into contact with the photosensitive layer surface, and the top face of the solid body exhibits a surface roughness (Ry) of from 4.0 to 8.0 &#x3bc;m.

Surface abrading method of photosensitive layer of electrophotographic photoreceptor

In a method of manufacturing a photoreceptor drum which has been coated and then quick dried, the drum having a plurality of vertically-stacked base drums that are coated and dried from the uppermost base drum toward a lowermost base drum. The uppermost base drum is held by a second holding member, and a next lower base drum is held by a first holding member respectively. Thereafter the uppermost base drum is separated from the next lower base drum.

Separating and recovering method of continuously coated photoreceptor

The improved toner is produced by supplying a spheroidizing treatment under mechanical impact force to resin particles that contain at least magnetic particles in a resin and said magnetic particles are substantially spherical in shape.

Magnetic toner

A magnetic toner comprising at least a binder resin, a magnetic powder and polyolefine is disclosed. The magnetic toner comprises a Wadel's globularity ranging from 0.4 to 0.8, and polyolefine comprises a content ranging from 10 to 40 weight % on a surface of the toner.

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Hachioji, Japan

Hirohiko Seki