Kabushiki Kaisha Toshiba

Seiichiro Fushimi

Yoshitsugu Nakatomi

Takashi Shimazaki

Ken Omura

Yoshihiko Sugiyama

In an image forming apparatus has a photosensitive drum, the drum is charged by a main charger. A light beam bearing image information is applied to the drum by an exposure system to form a latent image on the surface of the drum. The latent image is developed by a developing unit, using a toner to form a toner image on the drum surface. The toner image is transfered to the surface of a paper sheet by a transfer charger. The developing unit serves to remove, simultaneously with the development of the latent image, the toner remaining on the drum surface after the transfer by the transfer charger. Before the removing of the remaining toner, the drum is in sliding contact with a brush member. The remaining toner is temporarily attracted to the brush member by the bias voltage applied to the brush member, with the result that the remaining toner becomes easy to separate from the drum. In the apparatus, the drum and at least the brush member are integrated as one process unit. The process unit is removably insertable into a predetermined operative position in the body of the apparatus. Accordingly, when the drum is removed from the operative position, the toner attracted to the brush member is prevented from scattering in the body by removing the brush member with the drum.

Image forming apparatus having distribution brush and image carrier

An image forming apparatus includes a memory distributing unit arranged between a transfer unit and a developing unit which develops an electrostatic latent image formed on a photoconductive drum and cleans the drum surface. The distributing unit has a brush formed of bundles of electrically conductive fibers contacting the circumferential surface of the drum. A predetermined voltage is applied from a power source to the fiber bundles so that residual developing agents on the drum surface are attracted to the fiber bundles. The distributing unit includes a lining member which is formed of an insulating material and presses the brush against the drum surface to prevent the attracted developing agent from scattering from the fiber bundles.

Image forming apparatus including a device for simultaneous

In a light deflecting apparatus having a motor shaft rotatable at high speed, bearings have a suitable simple construction such that the whole apparatus can be reduced in size and weight.

Light deflecting apparatus

A paper feeding mechanism for use in a printer apparatus, etc., includes upper and lower paper cassettes so provided as to be movable, a reverse guide provided below the lower paper cassette and having at least two divided parts, at least one of the divided parts being openable by moving the lowest paper cassette, and another reverse paper guide provided between the lower paper cassette and the upper paper cassette and having at least two parts of which at least one part is openable by moving the lower paper cassette. It is, therefore, possible to minimize an installation area occupied by the printer apparatus. Since the paper cassette is located in a spacing which is prepared against paper jamming, it is possible to make the printer compact as a whole.

Image forming apparatus for forming an image on both sides of a

An image forming apparatus has a developing device for simultaneously developing a charged pattern with developing agent into a developed image on an image carrier and removing developing agent remaining on the image carrier from a previous image forming operation from portions of the image carrier other than the developed image. The developed image is transferred from the image carrier to a recording medium. The image forming apparatus also has a dispersing unit for dispersing any developing agent remaining on the image carrier after the transfer of the developed image, the dispersing unit including at least two brush members spaced each other in sliding contact with the image carrier. A guide plate is mounted on the dispersing unit, to guide the recording medium to the brush members.

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Yokohama, Japan

Seiichiro Fushimi