Kyocera Document Solutions Inc.

Panasonic Corporation

Kyocera Documents Solutions Inc.

Yoshimi Shimizu

Takahiko Murata

Yasuhiro Tauchi

Ai Takagami

Yukari Ota

Shinji Otani

Masashi Fujishima

Mitsuhiro Goda

Takashi Somete

Kiyotaka Kobayashi

Tamotsu Shimizu

Yuji Harada

Takahisa Nakaue

Akihiro Watanabe

Hidenori Takenaka

Kenichi Tamaki

Teruhiko Nagashima

Koji Suenami

Susumu Hanano

Kanako Morimoto

Hirofumi Tsuji

Norio Kubo

Masahiko Niwayama

Saichirou Kaneko

Chisato Hatakeyama

Yu Sasaki

Sakae Saito

Chikara Ishihara

Yuji Kamiyama

Shizuka Okada

Kazuyuki Sawada

Yoshinobu Yoneima

Katsuya Ota

Yasuhiro Oishi

Maki Ike

An image forming apparatus includes a photoreceptor, an exposure unit, a developing unit, and a control unit. The control unit sets the toner-layer-forming electric potential difference lower than an electric potential when forming the image on the print medium, forms a combined patch for calibration by the set toner-layer-forming electric potential difference for calibration, so as to adjust the developing-bias potential by measuring a print density of the formed combined patch. The combined patch includes a first patch and a plurality of second patches. The plurality of second patches have a width within a range of 0.2 mm to the predetermined value in the peripheral-velocity direction of the photoreceptor, extend with a length equal to or more than the predetermined value in the rotation-shaft direction of the photoreceptor, and are arranged at a predetermined interval in the peripheral-velocity direction of the photoreceptor.

Image forming apparatus and image forming method that ensure improved measurement sensitivity of patch density with optical sensor, and recording medium therefor

A developing device includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member facing the developing roller, and has a toner receiving surface inclined downward from the image-carrier side toward the toner-supplying-roller side. The toner receiving surface is disposed to be inclined so as to rise from the toner-supplying-roller side toward the image-carrier side. The toner receiving surface has a plurality of grooves formed therein to be inclined to approach a center part of the toner receiving surface from each end side of the toner receiving surface in its longitudinal direction, from an edge of the toner receiving surface on the image-carrier side toward an edge of the toner receiving surface on the toner-supplying-roller side.

Developing device and image forming apparatus including same

A developing device of the present disclosure includes a developing roller, a toner supply roller, a regulation blade, a casing, a toner receiving support member, a toner receiving member, a vibration generation unit, and a vibration inhibition member. The toner receiving support member is disposed in the casing so as to be opposed to the developing roller or the toner supply roller in an area between the regulation blade and an image carrier. The toner receiving member has a toner receiving surface that receives toner dropping from the developing roller, and is supported so as to be swingable about an end edge thereof on a toner supply roller side as a fulcrum. In a state where the toner receiving member is not vibrating, the vibration inhibition member is in contact with each of both end portions of the toner receiving surface in a longitudinal direction thereof.

Developing device including a toner receiving member vibrated by a vibration generation device, and image forming apparatus including the same

A developing device of the present disclosure includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver support member is disposed inside the casing so as to face the developing roller or the toner supplying roller between the regulation blade and an image carrier. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member, and has a toner receiving surface that receives toner falling from the developing roller. The vibration generator vibrates the toner receiver member. At each end part of the toner receiving surface in its longitudinal direction, there is formed a thin-walled portion that is thinner in thickness than other parts of the toner receiving surface.

In the case where development is performed by a two-component developing method, a previous charge removal light-emitting portion applies charge removal light to a first charge removal target region of an effective outer circumferential surface of a photosensitive member on which effective outer circumferential surface an electrostatic latent image can be formed. The first charge removal target region includes a part of a magnetic brush contact region of the effective outer circumferential surface and a region of the effective outer circumferential surface between the magnetic brush contact region and a transfer position of a toner image.

Image forming apparatus having a function to apply charge removal light to photosensitive member

A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. A resin coat layer has been formed on an outer circumferential surface of the roller main body, the resin coat layer being made of a resin material having electric conductivity. A product of resistance component Rs [&#x3a9;] and electrostatic capacitance component Cs [F] in AC impedance Z of the roller main body is in a range from 2.79&#xd7;10to 6.77&#xd7;10, the AC impedance Z being obtained when an AC voltage of a predetermined frequency f is applied.

Developing roller, developing device, and image forming apparatus including developing device

A charge applying member includes a conductive roller and a shaft. The conductive roller includes a first region in contact with a member to be charged and facing an image forming region of the member to be charged and a second region next to a longitudinal end of the first region and facing a region of the member to be charged outside the image forming region and is configured to apply a charge to the member to be charged. The shaft formed of a metallic material inserted into the conductive roller and configured to be given a voltage from a power supply. A region plated with a metal having a lower ionization tendency than the shaft is formed as a plated region on a surface portion of the shaft corresponding to the first and second regions and a non-plated region is formed on a surface portion of the shaft corresponding to the second region.

Charge applying member and image forming apparatus with the same

A cleaning device includes: a cleaning rotating body; a scraping member; a toner restriction face; and a downstream side restriction portion. The cleaning rotating bodyis arranged in sliding contact with the surface of the image carrying body. A front end portionof the scraping memberis arranged in contact with or in proximity to a surface of the cleaning rotating body. The scraping memberis a plate-like member and includes a toner receiving faceto which the toner is carried from the front end portion. The toner restriction faceis arranged to be orthogonal to the toner receiving face. The downstream side restriction portionrestricts movement of the toner to a downstream side in a rotational direction of the cleaning rotating body

Cleaning device and image forming apparatus

A cleaning apparatus is provided with a cleaning roller that is positioned so as to be in contact with a photosensitive drum, and with a toner layer thickness regulating member that regulates the thickness of a toner layer adhering to the surface of this cleaning roller. The toner layer thickness regulating member is formed by a toner layer thickness regulating roller that rotates in contact with the cleaning roller.

Cleaning apparatus and image forming apparatus

Disclosed is a semiconductor device including: an N-type RESURF region formed in a P-type semiconductor substrate; a P-type base region formed in an upper portion of the semiconductor substrate so as to be adjacent to the RESURF region; an N-type emitter/source region formed in the base region so as to be apart from the RESURF region; a P-type base connection region formed in the base region so as to be adjacent to the emitter/source region; a gate insulating film and a gate electrode overlying the emitter/source region, the base region, and the RESURF region; and a P-type collector region formed in the RESURF region so as to be apart from the base region. Lattice defect is generated in the semiconductor substrate such that a resistance value of the semiconductor substrate is twice or more the resistance value of the semiconductor substrate that depends on the concentration of an impurity implanted in the semiconductor substrate.

Semiconductor device with substrate having increased resistance due to lattice defect and method for fabricating the same

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Osaka, Japan

Yoshimi Shimizu