Casio Computer Co., Ltd.

Kabushiki Kaisha Toshiba

Casio Electronics Manufacturing Co., Ltd.

Toshiro Honda

Tadao Yamamoto

Hideki Takahashi

Koji Imamiya

Hideaki Inoue

Kenji Nakayama

Shigeru Shimizu

Kenichiro Asako

Eiichi Takeuchi

Yasuhito Sato

Shigenobu Osawa

Tamiko Nakajo

Takashi Shimazaki

Tetsuya Abe

Mitsugu Oishi

Masaaki Dohi

Takeo Hirono

Shinichi Hisatomi

Mitsuo Hayashi

Minoru Tezuka

A developing device includes a developing roller and a conductive member. The rotatable image developing roller feeds a one-component toner to an image forming drum. The developing roller is in contact with the linearly shaped conductive member. A voltage is applied to the developing roller, while a second, higher voltage is applied to the conductive member. The two voltages are of the same polarity. This arrangement makes it possible to control component aggregation on the developing roller and eliminate any image/non-image potential difference on the image carrier.

Developing device having developing roller and conductive member

A device for developing a latent image on an image bearing member includes a developing roller, rotatably mounted facing the image bearing member, for transferring a developing agent to the image bearing member, and a supply roller, rotatably mounted adjacent to the developing roller, for supplying the developing agent to the developing roller at a supplying portion. The developing agent is stored in the storing member and is provided to the supply roller upstream of the supplying portion with respect to a rotating direction of the supply roller. A disordering member, mounted downstream of the supplying portion with respect to the rotating direction of the supply roller, disorders the developing agent on the surface of the supply roller to prevent the developing agent from causing hardening of the supply roller.

Developing device having disordering member in contact with supply roller

A developing device includes a storage portion for storing toner, a developing roller facing and supplying the toner to an image carrier, and a rotatable supply roller for supplying the toner in the storage portion to the developing roller. A thin layer of the toner supplied from the supply roller is formed on the circumferential surface of the developing roller by a blade. Different bias potentials are individually applied to the supply roller and the developing roller by means of first and second power source so that the bias potential of the supply roller is higher than that of the developing roller with respect to the polarity of the toner.

Developing device having first and second toner supply means with an

An electrostatic recording apparatus includes a developing agent carrying member having a surface for carrying a developing agent thereon. A plurality of recording electrodes are arranged on the surface of the developing agent carrying member in parallel to each other at a predetermined gap while being electrically insulated from each other. An electrode cylinder is arranged to oppose the plurality of recording electrodes at a predetermined gap. A developing agent convey section conveys the developing agent such that a circulating convey path is formed along the surface of the developing agent carrying member. A voltage control section outputs a control signal including recording data. A recording electrode drive section is provided inside a space defined by the circulating convey path. Upon reception of the control signal from the voltage control section, the recording electrode drive section applies a recording voltage to the plurality of recording electrodes in accordance with the recording data, and selectively transfers the developing agent conveyed by the developing agent convey section to the electrode cylinder, thereby forming a recording image.

Electrostatic recording apparatus with an electrode drive means within

An electrostatic recording apparatus includes a magnet roll for conveying a developing agent along a predetermined developing agent convey path. A plurality of recording electrodes are arranged to oppose the magnet roll and along the developing agent convey path. An opposite electrode has a portion opposing the plurality of recording electrodes and is arranged with a predetermined gap from the plurality of recording electrodes. A voltage applying unit applies a recording voltage corresponding to supplied dot recording information to each of the plurality of recording electrodes to generate a transferring electric field for transferring the developing agent to the opposite electrode between the opposite electrode and the plurality of recording electrodes, thereby forming a dot recording image corresponding to the dot recording information on the opposite electrode. The voltage applying unit applies, between the plurality of recording electrodes and the opposite electrode, a recovering electric field for recovering a part of the developing agent transferred on the opposite electrode to the plurality of recording electrodes within one-dot recording period in which one dot of the dot recording information is recorded in the conveying direction of the developing agent.

Electrostatic recording apparatus for selectively transferring a

An electrostatic recording apparatus includes a developing agent carrier member arranged along a predetermined developing agent convey path. A developing agent conveying section conveys a developing agent along a surface of the developing agent carrier member. A plurality of recording electrodes are arranged on the surface of the developing agent carrier member at a predetermined pitch. An opposite electrode is arranged to oppose the plurality of recording electrodes at a predetermined gap. A voltage applying section applies a voltage corresponding to recording information to each of the plurality of recording electrodes to selectively transfer the developing agent, which is conveyed along the surface of the developing agent carrier member, to the opposite electrode. The developing agent carrier member has a step at a portion on its surface shifted to an upstream side of a developing agent convey direction from a position closest to the opposite electrode. At least distal end portions of the plurality of recording electrodes project from this step toward the closest position to form projections. The projections are swingable in a direction of approaching or going away from the opposite electrode.

Electrostatic recording having swingable recording electrodes to prevent

A method of forming an image without cleaning on the basis of repeated electrophotographic process cycles. Each process cycle includes charging a surface of a photosensitive drum to a predetermined polarity, and irradiating the charged surface of the photosensitive drum with light which carries image information, thereby forming a latent image corresponding to the image information. The latent image is visualized by using a dry developer material, and the visualized image is transferred from the surface of the photosensitive drum onto a transfer medium. The developer material contains a transfer accelerator (hydrophobic silica or light-transmitting fine powder) for improving efficiency for transfer of the visualized image onto the transfer medium.

Method of forming electrophotographic image

Growing community of inventors

Tokyo, Japan

Toshiro Honda