Hitachi Koki Co., Ltd.

Hitachi, Ltd.

Mitsubishi Chemical Corporation

Yosuke Saito

Masayasu Anzai

Teruaki Mitsuya

Takao Umeda

Takashi Suzuki

Hiroyuki Mabuchi

Yasuo Takuma

Yasuo Kikuchi

Shinichi Nishino

Masato Miwa

Tomio Sugaya

Tooru Fuse

Katsuya Kawai

Katsuhiro Akinaga

Masakazu Yokomizo

Akihiro Kato

Masashi Fujiwara

Hirobumi Ouchi

The present invention resolves the problem by using a multilayer-structured carbon material, as a nonaqueous electrolytic solution secondary battery negative electrode, which satisfies the following (a) and (b):

Multilayer-structured carbon material for nonaqueous electrolytic solution secondary battery negative electrode, negative electrode for nonaqueous secondary battery, lithium ion secondary battery, and process for producing multilayer-structured carbon material for nonaqueous electrolytic solution secondary battery negative electrode

In an image printer performing multi-color printing, two magnetic poles having the same polarity are provided adjacent to each other in a position facing the printing body of the second developing agent holding body provided in the second developing unit, and development is performed under a condition satisfying the following formulas;

Image printer

A bias cleaning system has an electrically conductive brush roller for collecting toner which has to adhered a transfer belt by scrubbing the toner off the transfer belt under a condition in which a direct current voltage of the opposite polarity to the charge of the toner is applied to the brush roller. A corona charger is also provided for decreasing the amount of charge on the toner on the transfer belt in a region of the belt up-stream of the electrically conductive brush roller in the moving direction of the transfer belt.

Bias cleaning system and electrostatic printing apparatus therewith and

In an image forming method wherein a toner image formed on a photoreceptor by the sequence of a charging step, an imagewise exposure step and a development step is transferred and fixed on a recording sheet by a transfer and a fixing step, the improvement wherein the developer used in the development step comprises at least 30 wt % of a toner having a particle size of no more than 8 .mu.m and a magnetic carrier of low saturation magnetization, the toner being capable of carrying electric charges in a quantity greater than the value at which a maximum amount of the toner is deposited for development, the toner being electrified to have a charge quantity greater than a predetermined level by mixing the toner and the carrier under agitation before the effective development region is reached, a magnetic brush being formed after the toner electrification, the carrier and the toner being then given a localized movement and vibrational force in the effective development region, the toner being deposited on the latent electrostatic image under the action of an electrical or mechanical disturbance that promotes the supply and separation of the toner particles, whereby a toner image is formed on the photoreceptor, the toner image being then transferred onto the recording sheet by a transfer device holding a constant electric field and, following this transfer step, the residual toner on the photoreceptor being charged again and subsequently removed from the photoreceptor under the action of an electric field.

Method and apparatus for forming toner image

Growing community of inventors

Ibaraki, Japan

Yosuke Saito