Fuji Xerox Co., Ltd.

Yoshihiro Maekawa

Koji Fukushima

Manabu Furuki

Naoki Ohnishi

Jin Kasono

Masato Ono

Takuro Hoshio

Taichi Yamada

Fumio Ojima

Hiroshi Takayama

Hiroyuki Miura

Naoki Ohta

Hiroyuki Fukuda

Yuusaku Shibuya

Nagahito Ichijo

Eiji Funabashi

Kazuya Furuta

Susumu Hiranuma

Yoshinori Kubo

Kazuo Sueyoshi

Kiyoshi Yamaguchi

Tomomitsu Fukuda

Masako Kojima

There is provided a charging member cleaning roller including: a core body; and an elastic layer that is provided on a peripheral surface of the core body and includes a polyurethane foam obtained from at least a polyester polyol, a foam stabilizer, and a catalyst. Moreover, there is provided a charging member cleaning roller including: a core body; and an elastic layer that is provided on a peripheral surface of the core body and includes a urethane foam having an open-cell structure, a resilience of approximately 15% to 30%, and a hardness of approximately 150N to 230N.

Charging member cleaning roller, charging member cleaning roller for charging device, process cartridge and image forming apparatus

An image forming apparatus containing an image holding member, a contact-type charger for charging a surface of the image holding member, an exposure unit for forming an electrostatic latent image by exposing the charged surface of the image holding member, a developing unit for developing the electrostatic latent image with a spherical toner to obtain a toner image, and a transfer member for electrostatically transferring the toner image from the surface of the image holding member onto a transfer material. A number of toner particles remaining on the surface of the image holding member before passing through an abutting portion between the image holding member and the contact-type charger is in a range of 100 to 400 per unit area (mm).

Image forming apparatus and a process cartridge which is attachable and detachable from the image forming apparatus

An image forming device which is capable of preventing generation of toner filming and obtaining a stable image quality without defects over a long period and which is environmentally friendly. The image forming device, for forming an image with a spherical toner, includes image holding members, contact type charging member, exposing member, developing member, and transfer member. A toner shape change ratio (Tt) of deformed toner particles passed between the contacting portions of the image holding members and the charging member is in a range of 50 to 100 percent.

Image forming device

The invention is to provide a toner, a toner cartridge and a developing device using the same in that an excellent image without a defect on the image is obtained in a long period of time, and stable agitation and transportation can be conducted. In a toner cartridge containing a toner containing at least a binder resin, a colorant and wax, inside the toner cartridge, and a toner agitating and transporting member for supplying the toner under agitation and transportation, the toner contains the wax in an amount of from 3 to 10% by weight and has a mean particle diameter of from 3 to 10 &mgr;m, and the toner agitating and transporting member is arranged as rotatably inside the toner cartridge to form a distance of from 0.5 to 3.0 mm between the member and an inner wall of a main body of the toner cartridge.

Toner agitating and transporting member of a toner cartridge and developing device

An apparatus for performing a copying operation contains a photosensitive drum, a focusing optical system for directing reflected light from an original image onto the photosensitive drum, a lamp for lighting the original image, a light quantity sensor for detecting the quantity of reflected light from the original image and for controlling the quantity of light of the lamp on the basis of the detected value of the quantity of reflected light, a first filter provided in an optical path of the focusing optical system so as to cut-off light having a wavelength not longer than a predetermined value, and a second filter provided on a light-detection surface of the light quantity sensor. The second filter has a cut-off wavelength point shorter than the first filter.

Copying apparatus

Growing community of inventors

Minami-ashigara, Japan

Yoshihiro Maekawa