Matsushita Electric Industrial Co., Ltd.

Yoshiaki Ijima

Yuzo Kawano

Yoshihiro Mizoguchi

Junichi Tanizaki

Naoki Yamaguchi

Makoto Kamioka

Masaya Shimada

Yoshikazu Katsumata

Toshimi Hattori

Eiichiro Nakao

Kazuhiko Tajima

Nobuo Kishiyama

Yutaka Noda

Takeshi Houman

Yoshinori Ejima

Jun-ichi Tanizaki

Yuhzou Kawano

Tetsuo Korenaga

Kazuhiko Tashima

In an image forming apparatus, the workability of assembling of a cleaning blade is improved, and the dimensional accuracy between the cleaning blade and a photosensitive member is properly ensured. A cleaning bladehaving a body portionconfigured by an elastic plate member and a planar base plate portionto which the body portionis secured is held and secured by: a first butting part Pwhich is a predetermined position in a first face Spositioned in a front portion of the base plate portionin the rotation direction of a photosensitive drumto; a second butting part Pwhich is in a second face Sopposed to the first face S, and which is positioned closer to the photosensitive drumtothan the first butting part P; a third butting part Pwhich is an end part of the base plate portionthat is opposite to the photosensitive drumto; and the photosensitive drum.

Image forming apparatus with photosensitive member cleaning blade

An image developing apparatus has a photosensitive body, an image-developing roller, a toner feeding roller, a housing cassette, whereon the image-developing roller and the feeding roller are mounted, for storing the toner, a plate-like blade mounted on the housing cassette, a sheet member for preventing the toner from leaking, and toner sealing devices made of a resilient material for preventing the toner from leaking. The sheet member is displaced between a development area of the developing roller and a position of the pressed contact between the developing roller and the feeding roller. The sheet member maintains a uniformly contact along a longitudinal direction of the developing roller. The toner sealing devices are either mounted integrally to, or formed integrally with the blade as one unit, and provided at both ends of the blade. A space is provided between the toner sealing devices and the housing cassette. The structure of this invention realizes prevention of the toner from leaking in the image developing apparatus, since it effectively fills a space between the blade and the developing roller. Furthermore, the structure also improves productivity and reduces working processes, since it makes adhesion of the toner sealing devices unnecessary in manufacturing the image-developing apparatus.

Image developing apparatus having developer seal

A printer for forming a toner image to be transferred onto a work piece, includes a latent image roller with an outer peripheral image surface adapted to be electrified in such a manner that an electrostatic latent image is formed thereon, an image developing roller with an outer peripheral toner surface adapted to hold thereon toner to be supplied onto the outer peripheral image surface so that the electrostatic latent image is developed by the toner to form the toner image, an electrifier for electrifying the outer peripheral image surface, and a discharger for partially electrically discharging the electrified outer peripheral image surface to form the electrostatic latent image. A motor drives both the latent image roller and the image developing roller.

Printer

An exposure apparatus is set to each color so that latent-image lines formed on photosensitive drums,to,have predetermined inclinations from rotation axes of the photosensitive drums,to,to form electrostatic latent images on the photosensitive drums,to,while performing curve correction on the photosensitive drums,to,. Peripheral speeds of the photosensitive drums,to,are controlled so that inclinations of toner images of a plurality of colors on an intermediate transfer belt become equal to each other. Thereby, each pixel is not shifted when light-scanning images are superimposed each other by the exposure apparatus,and it is possible to obtain a high-quality image free from image deterioration due to scanning irregularity caused by inclination shifts of scanning lines,K,,C,,M, and,Y.

Multiple-image forming apparatus capable of correcting color shifts

A motor pulley for driving a photosensitive drum and a motor gear for driving a developing roller are fixed to a rotating shaft of a motor. The developing roller is provided with a developing roller driving gear which engages with the motor gear, and the photosensitive roller is provided with a photoreceptor driving pulley, to which a driving force from the motor pulley is transmitted.

Image forming apparatus having drive mechanism for photosensitive drum

A color image-forming apparatus includes an endless belt-like photosensitive member stretched between and wound around a drive roller and a driven roller, and a plurality of developing rollers making contact with an outer surface of the photosensitive member. At least one flexure correction shaft is held in contact with an inner surface of the photosensitive member on the side remote from the developing rollers. With this construction, the condition of contact between each developing roller and the photosensitive member is made stable and uniform, and the developing conditions for all the colors become uniform so that a high-quality image can be obtained.

Color image-forming apparatus adapted to stabilize contact between

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Dazaifu, Japan

Yoshiaki Ijima