Canon Kabushiki Kaisha

Toko, Inc.

Hiroshi Satomura

Hidemi Egami

Tatsuo Takeuchi

Yukio Nagase

Nagao Hosono

Takashi Hasegawa

Tohru Den

Keishi Saito

Akio Maruyama

Masao Sugata

Takeshi Menjo

Tadashi Yamakawa

Yuji Sakemi

Yutaka Inoue

Yoshihiro Oguchi

Koji Amemiya

Keiji Hirabayashi

Susumu Ito

Katsuya Oikawa

Katsuo Saito

Noriko Kurihara

Keiko Ikoma

Kuniji Osabe

Koichi Sato

Takashi Saito

Hiroshi Inoue

Yutaka Inaba

Masanori Yamada

Yasushi Miura

Tadashi Ishikawa

Yoshiyuki Osada

Takeshi Honjo

Masataka Naito

Masahiro Itoh

Fumitaka Kan

Satoshi Omata

Yoshihiko Hirose

Michio Shigenobu

Masao Yoshikawa

Akihito Hosaka

Hideaki Yano

Katsuyoshi Takano

Sachiko Naito

Katuo Saitor

A developing apparatus is provided with a container for accommodating a developer for containing magnetic particles, and a rotatable carrying member is disposed at least partly in the container and faces an image bearing member at a developing station. The rotatable developer carrying member carries the developer thereon to the developing position. A magnet is disposed in the developing carrying member and includes a plurality of magnets for conveying the developer. A magnetic member is disposed close to the circumferential surface of the developer carrying member and in a circumferential direction of the developing carrying member in a region thereof where the developer carrying member is disposed in the developer container, adjacent to a longitudinal end of the developer carrying member. The magnetic member is magnetized by the magnet and the magnetic member cooperates with the magnet to form a magnetic field for forming a magnetic brush of the developer in a gap between the magnetic member and the developer carrying member.

Developing apparatus having a magnetic seal

A method of and an apparatus for recording an image on a recording medium. A heat-sensitive sheet having a light-transmissive base sheet provided with a heat-fusible supercooled substance layer is made to abut a copy original such that the heat-fusible supercooled substance layer faces the original image to be copied while flashlight is projected onto the base sheet of the heat-sensitive sheet. Thus, the image portion of the copy original to be copied absorbs the light transmitted through the heat-sensitive sheet and thereby generates heat so that an adhesive area containing a pattern corresponding to the original image is formed on the supercooled substance layer. After the heat-sensitive sheet has been removed from the copy original, such an adhesive area is transferred to the recording medium owing to the adhesiveness of the adhesive area.

Method and apparatus of recording image

An illumination device for causing a discharge tube to emit a light by applying a high frequency electromagnetic field thereto from outside including a high frequency wave oscillating circuit, a discharge tube, and a shield for shielding the oscillating circuit and the discharge tube to prevent the adverse effect of high frequency noise. When used in an original reading apparatus of the movable optical system type, the portion of the illumination device from the high frequency wave oscillating circuit to the discharge tube is reciprocally moved as a unit with the shield.

An original reading apparatus with shielding

An image forming apparatus includes a movable image bearing means, an image forming device for forming an image on the image bearing member, an image receiving material bearing member for carrying and conveying an image receiving material to an image transfer station where the image formed by the image forming device is transferred from the image bearing member to the image receiving material, an image transfer device disposed at the transfer station in opposition to the image bearing device, a discharger, disposed downstream of the image transfer device with respect to the movement direction of the image receiving material and in opposition to the image receiving material carrying member, and operative when a trailing edge of the image receiving material is substantially immediately before a transfer zone by the image transfer device or when it is in the transfer zone, during the period when the image receiving material is conveyed by the image receiving material carrying member.

Image forming apparatus

An image forming apparatus includes a movable image bearing member, a device for sequentially forming on the image bearing member images corresponding to different color information, a device for transferring onto an image receiving material the images formed on the image bearing member, image receiving material carrying member for carrying and conveying the image receiving material to an image transfer station where the image bearing means and the transfer device are opposed, wherein the images formed on the image bearing member are sequentially transferred superimposedly onto the image receiving material at the transfer station, a discharging device disposed downstream of the image transfer device with respect to movement detection of the image receiving material carrying member, a detector for detecting a temperature and a humidity within the image forming apparatus, and a control device for controlling outputs of the image transfer device and the discharging device on the basis of output from the detector and predetermined data.

An improved photosensitive member for use in electrophotography which comprises a substrate and a light receiving layer having a charge carrier generation layer and a charge carrier transportation layer composed of a carbonic film the nucleus of which matrix being carbon atom, which contains 40 atomic % or less of hydrogen atom and which possesses an optical band gap of 1.5 eV or more and an electric conductivity of 10.sup.-11 .OMEGA..sup.-1 cm.sup.-1 or less. It is always and substantially stable regardless of the changes in use environments and it enables to make highly resolved images with a clear half-tone which are highly dense and quality at high speed.

Photosensitive member having a light receiving layer comprising a

An improved photosensitive member for use in electrophotography which is characterized by having a substrate and a photoconductive layer comprising a carbonic film, the nucleus of which matrix being carbon atom, which contains 30 atomic % or less of hydrogen atom and at least one selected from the elements of Group III and Group V of the Periodic Table, and which has an optical band gap of more than 1.5 eV and an electrical conductivity of 10.sup.-11 .OMEGA..sup.-1 cm.sup.-1 or less. It is always and substantially stable regardless of the changes in use environments and it enables to make highly resolved images with a clear half-tone which are highly dense and quality at high speed.

Photosensitive member having a photoconductive layer comprising a

An image forming apparatus comprising an exposure light source, a printer head which comprises a group of micro-shutters each controlling the transmission or interruption of light from the exposure light source, and an image bearing so disposed to be irradiated with light signals transmitted through the printer head. The group of micro-shutters are arranged in a matrix comprising a plurality of rows and a plurality of columns. The group of micro-shutters are formed by a substrate having thereon a plurality of segment electrodes each forming a shutter and connected to a drain of a thin film transistor, another substrate having thereon a common electrode, and a liquid crystal interposed between the substrates. The image forming apparatus further comprises means for applying a scanning signal to the gate of the thin film transistor and applying an electric signal corresponding to image information in synchronism with the scanning signal.

Image forming apparatus and driving method therefor

A discharge tube adapted to produce a light by an extraneous high frequency electromagnetic field is heated before discharge to thereby improve the rising-up of the discharge and achieve uniformization of emitted light. Further, the discharge tube is heated by an electrode which applies a high frequency electromagnetic field to the discharge tube.

Lighting device

An illumination apparatus includes a discharge tube for emitting light upon an application of an external high frequency wave electromagnetic field, an electrode, arranged outside the discharge tube, for applying the high frequency wave electromagnetic field to the discharge tube, a high frequency wave applying unit for supplying high frequency wave power to the electrode, and a projected portion extending from the discharge tube. The projected portion extends to a position where the high frequency wave electromagnetic field generated by the electrode has a level lower than a discharge initiation level. The high frequency wave power is controlled by changing a voltage, a frequency, a duty ratio or the like.

Illumination apparatus

A method of charging or discharging a member including the steps of, opposing to a member to be acted, a discharging member having a dielectric member, an inducing electrode and a discharging electrode sandwiching the dielectric member so that the discharging electrode faces the member to be acted, applying an alternative voltage between the inducing electrode and the discharging electrode to produce a surface discharge on a surface of the dielectric member at the discharging electrode side, moving the member to be acted relative to the discharging electrode to charge or discharge the member to be acted by the thus formed surface discharge, ceasing the production of the surface discharge by attenuating both of positive and negative, at the discharging electrode relative to the inducing electrode, components of the alternating voltage at least down to a discharge stopping voltage and then rendering the voltage zero.

Method and device for charging or discharging member

A device for electrically discharging or charging a member to be discharged or charged, includes a dielectric member, first and second electrodes embedded in the dielectric member, the first and second electrodes being supplied with an alternating voltage therebetween to cause discharge adjacent a part of a surface of the dielectric member at a predetermined discharge starting voltage, a third electrode disposed to or adjacent a part of the surface of the dielectric member at such a position as when the discharge occurs by application of the alternating voltage between the first and second electrodes, no discharge occurs between the first electrode and the third electrode or between the second electrode and the third electrode, AC source for applying an alternating voltage between the first electrode and the second electrode, DC source for applying a bias voltage between the third electrode and the member to be discharged or charged.

Charging or discharging device

An image reading apparatus comprises, in a preferred embodiment, LEDs and image sensors for reading image and location information of an original, another LED and a photo sensor for generating a read start clock, memories for storing the image and location information read by the image sensors in one-to-one correspondence, a transparent sheet with matrix stripes placed on the original to provide the location information of each image information, and a CPU for controlling the operation sequence and detecting a ramp in the reading apparatus.

Image reading apparatus including means for accurately determining the

A method of charging or discharging a member including the steps of, opposing to a member to be acted, a discharging member having a dielectric member, an inducing electrode and a discharging electrode sandwiching the dielectric member so that the discharging electrode faces the member to be acted, applying an alternating voltage between the inducing electrode and the discharging electrode to produce a surface discharge on a surface of the dielectric member at the discharging electrode side, wherein width of an area where the surface discharge is produced is substantially equal to width of the inducing electrode, and charging or discharging the member to be acted by the thus formed surface discharge.

Method and device for charging or discharging a member

A discharging device includes first and second electrodes sandwiching therebetween a dielectric member, wherein an alternating voltage is applied between the first electrode and the second electrode to produce electric discharge adjacent to the second electrode. The relation between the alternating voltage and a distance between an end surface of the second electrode to a corresponding end of a region where the electric discharge occurs, is so determined that an intermediate saturation property is exhibited. The level of the alternating voltage is set to provide the intermediate saturation property. With such a discharging device, a member is electrically charged or discharged.

Method and apparatus for electrically charging or discharging

Growing community of inventors

Hatogaya, Japan

Hiroshi Satomura