Fujitsu Corporation

Hisashi Hanzawa

Yoshio Yamaguchi

Tetsuya Takei

Kunihiko Sato

Sachio Sasaki

Yutaka Sato

Akira Nagahara

Kazuhiro Kakuguchi

Nobuyuki Tanaka

Hideki Kamaji

Morihisa Kawahara

Nobuo Kuwabara

Toshio Tooda

Hiroshi Kera

Haruyasu Watanabe

Michio Shimura

Hiroyasu Ishijima

Satoshi Seino

Yoshiya Ishiyama

Shinzo Tanaka

Masanori Nishido

Mituru Sato

An image transferring apparatus is provided which holds a print sheet in a nip between an image carrier and a transfer roller and supplies the current to the transfer roller to transfer a toner image formed on the image carrier to the print medium. The apparatus has conductive brushes disposed in contact with ends. of the transfer roller to form a bypass circuit. The bypass circuit is connected to ground through a resistor and introduce the part of the current supplied to the transfer roller in an image transferring operation, thereby avoiding formation of any print defects such as discharge-caused marks or toner stops.

Recording apparatus responsive to changing electrical resistance of transfer media

It is an exemplified object of the present invention to provide an image-forming device that can form a high-quality multicolor image at relatively low cost. To achieve the above object, the inventive image-forming device includes an endless belt that conveys a recordable medium; plural image-forming units that form a toner layer on the recordable medium via the endless belt; and a fixer that fixes the toner layer on the recordable medium, and a first pressing force applicable to the recordable medium by a last image-forming unit at a downstream side along a direction in which the recordable medium is conveyed among the plural image-forming units is greater than a second pressing force applicable to the recordable medium by another image-forming unit adjacent to the last image-forming unit at the downstream side among the plural image-forming units.

Image-forming device having a plurality of image-forming units respectively apply the difference force to the recordable medium

An electrophotographic image forming apparatus including a toner circulating mechanism for recovering a residual toner scraped from a photosensitive drum to a developing device. The developing device includes a housing for defining a toner chamber, a developing roller rotatably mounted in the housing, an agitator rotatably mounted in the housing and provided in the toner chamber, and a partition member mounted to the housing to define a carrier chamber between the partition member and the developing roller. The toner circulating mechanism directly returns the residual toner scraped from the photosensitive drum to the toner chamber in the developing device. The toner chamber may contain a foreign matter removing device. The partition member may have various shapes.

Electrophotographic image forming apparatus having a device for

The present invention relates to an image forming device such as a copying machine, a printer, or the like that records an image on a sheet of ordinary paper, more particularly to image forming device that can be installed in multiple direction, for example, vertically or horizontally. The object is to realize a device serviceable to any installation direction and to provide a stable operation independently on the installation direction and an improved reliability. The image forming device consists of an installation direction detecting unit for detecting an installation direction of the device body; and a control unit for controlling the operation of the device body according to the installation direction detected. The control unit includes the plural control sequence units each arranged in an installation direction for setting a control condition corresponding to the installation direction, and a control condition selecting unit for selecting a control sequence unit corresponding to the installation direction detected among the plural control sequence units.

Image forming device

Growing community of inventors

Kawasaki, Japan

Hisashi Hanzawa