Matsushita Electric Industrial Co., Ltd.

Other

Array Printers Ab

Katsutoshi Ogawa

Akira Kumon

Akira Fukano

Yoshitaka Kitaoka

Masahiro Aizawa

Kenji Asakura

Hiroyuki Matsuo

Kazumasa Hayashi

Toshiharu Koshino

Hiroshi Komakine

Masaichiro Tatekawa

Junichi Nawama

Akira Ryoji

Noboru Katakabe

Masahiko Nakamura

Masayoshi Miura

Hiroyuki Naka

Daido Komyoji

Naoko Matsuda

Hitoshi Hisada

Taichi Itoh

Takahiro Tsujimoto

Taichi Ito

Hiroshi Saegusa

Takuya Kitahara

Hidenori Tomachi

Akira Ryouji

Hiroshi Komata

Toichi Matsumura

An image forming device includes a developer carrier ( ) for carrying a charged developer ( ), and a developer passing controller ( ) for applying a voltage corresponding to an image. signal to a plurality of control electrodes ( ) to control the passing of said developer ( ), the developer passing controller having a plurality of developer passing holes ( ) through which the developer ( ) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes. The width (W ) of a control electrode row ( ) in the longitudinal direction where the control electrodes ( ) are arranged is wider than the width (W ) of an image forming area, and both ends (B , B ) of the control electrode row ( ) in the longitudinal direction are arranged outside the width (W ) of an image forming area.

Image-forming device

A method for forming a pattern on a surface of a panel substrate, includes electrically charging pattern-forming material particles, jetting out the electrically charged pattern-forming material particles through a nozzle by applying electrostatic force to the pattern-forming material particles to form a pattern, and fixing the pattern onto the panel substrate.

Method and apparatus for forming pattern onto panel substrate

To keep a toner ( ) deposited on a transportation belt ( ) from contact with a printhead ( ) and prevent the clogging of toner passage holes ( ) of the printhead ( ), the toner ( ) on a toner holding member ( ) is ejected toward the transportation belt ( ) through the toner passage holes ( ) after the movement of the transportation belt ( ) is initiated such that the cleaning of the toner passage holes ( ) is initiated.

Image forming method and image forming apparatus

An image forming apparatus has a toner carrier and a toner passing control having a plurality of toner passing holes for controlling passage of a toner. The toner passing control has upstream side secured, the downstream side extended by a spring, and is contacted with a stay on the downstream side of the contact point with the toner carrier, so that corrugation deformation is prevented. A vibrating plate and an ultrasonic vibration generator are coupled through a coupling portion, thereby relative displacement between the vibrating plate and the ultrasonic vibration generator is allowed. A detachable toner cartridge is formed by integrating a developing roller and a toner storing container.

Image forming device, and its manufacturing method and apparatus

In an image forming apparatus of the present invention, image signal electrodes are provided on a flexible printed circuit base in opposing relation to a developer carrying member such that they are disposed around the openings of developer passage holes, different voltages are applied thereto during dot formation and during non-dot formation, a throttle electrode is provided on the flexible printed circuit base in opposing relation to a counter electrode, a voltage always lower than the voltage applied to the image signal electrodes is applied to the throttle electrode when a developer of negative polarity is applied, and a voltage always higher than the voltage applied to the image signal electrodes is applied to the throttle electrode when a developer of positive polarity is applied.

Image forming device and image forming method

An image forming apparatus and an image forming method are characterized in that charged particle jumping can be controlled by applying signals having a small potential difference, and that low-voltage type switching devices can be used as switching devices for the power source. Control electrodes,are provided to move charged particles detached from a development roller,and to control the movement amount of the charged particles by generating a transfer electric field directly or indirectly between the development roller,and a rear electrode,. A bias electrostatic field is generated between the development roller,and the control electrodes,by applying a voltage under a jumping start voltage, which is a voltage having the polarity opposite to the polarity of the charged particles and is lower than the jumping start voltage for detaching the charged particles from the development roller

Image forming apparatus and image forming method

In an image forming device wherein printing is accomplished such that passing of charged toners fed from a developer roller 2 through a plurality of openings 14 is controlled by control electrodes 16 of an aperture electrode 12 in accordance with image signals, toners held on the developer roller 2 are caused to reach the vicinity of the openings 14, by inputting a predetermined signal to the control electrodes 16 of the aperture electrode 12, at least once during the period when no image forming action in accordance with the prescribed image signals is performed.

Image forming method and device

In a color electrophotographic printer, an intermediate transfer belt is provided to layer toner images of a plurality of colors, and the toner images on the belt are transferred onto a paper sheet. In order to remove a paper sheet when a paper jam happens, a door is provided in a case of the printer, while a cover is provided to protect a transfer region where the intermediate transfer belt contacts with a paper sheet for transferring the toner images. When the door is opened, the cover moves to cover a portion of the surface of the intermediate transfer belt exposed to the door. When the jammed paper sheet is removed, the image forming process is resumed immediately on the toner images on the intermediate transfer belt. Further, an intermediate transfer unit including the intermediate transfer belt and the cover detachable from the printer may be provided. In a modified example, a transfer member which is connected to a transfer member is provided instead of the cover, and when the door is opened, the transfer member covers the surface of the intermediate transfer belt.

Image forming apparatus having a cover for protecting a transfer region

An image forming apparatus includes a photoconductor, a developing electrode, at least a magnet disposed in the developing electrode, and a developer. The developing electrode is reciprocally movable against a rotation axis of the photoconductor. Thus, a setting angle of a magnetic pole of the magnet is not varied, even when the developing electrode is moved for cancelling decentering and deflection of the photoconductor and the developing electrode.

Image forming apparatus

Disclosed is an electrophotographic apparatus capable of producing a high-quality image free from image defects such as fine line dropouts. A photoconductor drum is used that has a magnet mounted therein in immovable fashion. After an electrostatic latent image is formed, the image is brought into contact with magnetic developer in a developer reservoir, causing the developer to be attracted to the photoconductor surface by magnetic force. When the photoconductor drum is rotated past an electrode roller to which an AC voltage is applied, toner is left only in image areas and the latent image is developed into a visible image. A sheet-like sealing member contacting the photoconductor is disposed on the upstream side of the developer reservoir in the rotating direction of the photoconductor drum. A conductive layer is provided on the surface of the sealing member opposite the surface thereof contacting the photoconductor.

Electrophotographic apparatus having sealing member

A developing unit for use in image forming apparatus includes a unit housing divided in three chambers, i.e. a toner applying chamber facing a photoreceptor and first and second toner replenishing chambers, by respective partition walls each having an opening as a passage for toner. The first and second chambers have rotation frames, respectively. Each frame has a radially extending arm to the end of which a toner transporting sheet is connected. Each sheet is provided with a friction film. When each frame rotates, the sheet with the friction film is pulled by the frame for its rotation under the toner so as to be deformed in the form of a circular arc. The toner is transported forwardly by the friction force of the friction film. When the amount of toner is reduced in each chamber, each sheet may resiliently restore to its original shape to contact the inner surface of the corresponding chamber so that a small amount of toner on the bottom of each chamber can be carried forwardly.

Multi-chamber electro-photographic developing unit for image forming

A charging member for charging a photosensitive member from above toner in an electrophotographic process in which charging, exposure, development, and transfer steps are performed repeatedly and in which a step of cleaning toner remaining on a photosensitive member is eliminated, the charging member including: an electrically conductive charging wire which is disposed in contact with the photosensitive member; the charging wire forming an angle of less than 90.degree. with a direction of a rotational axis of the photosensitive member and is arranged at an interval in the direction of the rotational axis of the photosensitive member; and a power source for applying a pulse voltage to the charging wire, the pulse voltage having a polarity identical with that of the toner so as to vibrate the toner.

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Hirakata, Japan

Katsutoshi Ogawa