Kyocera Document Solutions Inc.

Nitto-Denko Corporation

Nippon Shokubai Co., Ltd.

Asahi Kasei Kabushiki Kaisha

Kyocera Mita Corporation

Sumitomo Chemical Company, Limited

Omron Corporation

Asahi Kasei Fibers Corporation

Inter-University Research Institute Corporation High Energy Accelerator Research Organization

Tkx Corporation

Tokyo Denkai Co., Ltd.

Hiroshi Yamazaki

Kenichi Tamaki

Tamotsu Shimizu

Yoshihiro Yamagishi

Toshiki Naito

Eiji Nimura

Koji Kuramashi

Takuji Watanabe

Junichi Nakagawa

Akihiro Watanabe

Hiroyuki Hamakawa

Kuniaki Nakano

Masashi Fujishima

Asami Kotera

Masaki Hayashi

Toshihiko Omote

Hiroyuki Hanazono

Sayo Uemura

Satoshi Tanigawa

Martin John McCaslin

Masazumi Sasabe

Kenji Minami

Szu-Han Hu

Tomiyasu Ueta

Taiki Sueyoshi

Koichi Yonemura

Mineyoshi Hasegawa

Masataka Ikeda

Voon Yee Ho

Kazuto Oue

Takeshi Watanabe

Hideyuki Nosaka

Kozo Nogi

Tsuyoshi Hirata

Kinya Nagasuna

Hiromichi Tanaka

Eiji Toyoda

Minoru Wada

Ken Tsuzuki

Munehiko Nagatani

Tsutomu Yuasa

Kenji Kadonaga

Mitsuru Honjo

Takashi Saida

Shinji Mino

Hirotama Fujimaru

Takashi Goh

Hisashi Tsuda

Motohaya Ishii

Yasuto Ishimaru

Takashi Yamada

Tomohide Hozono

Masami Inoue

Kei Nakamura

Youhei Murakami

Shunji Aono

Asami Sasaki

Hiromoto Haruta

Ikutaro Saji

Katsuhiko Sakamoto

Hajime Nishio

Mitsuhiro Hashimoto

Akihiko Yamashita

Fumihiro Ebisawa

Takao Okuda

Akiko Mitsuhashi

Tomoyo Shibazaki

Yoshiki Fujii

Kazutomo Takahashi

Sayo Mabuchi

Kensuke Nishi

Mitsuyuki Yamamoto

Takao Fukumitsu

Atsushi Murasawa

Toshio Hayashiya

Kenji Saito

Katsuaki Ichise

Kojiro Kameyama

Hajime Sunahara

Toshiaki Mori

Koichi Takeuchi

Yukihito Taniguchi

Yoshiyuki Doi

Yuichi Kikuchi

Hiroshi Terui

Akihide Sano

Yutaka Miyamoto

An image forming apparatus includes an image carrying member, a charging device, an exposure device, a development device, and a development voltage power supply. The image carrying member has an amorphous silicon photosensitive layer formed on its surface. The development device includes a developer carrying member carrying two-component developer containing toner and carrier. The development voltage power supply applies to the developer carrying member a development voltage having an alternating-current voltage superposed on a direct-current voltage. When the blank part potential on the image carrying member is V0 [V], the direct-current voltage is Vdc [V], the peak-to-peak value of the alternating-current voltage Vac is Vpp [kV], and the gap between the image carrying member and the developer carrying member is Ds [mm], 10≤V0−Vdc≤90 and 1.2≤Vpp/Ds≤3.5 are fulfilled.

Image forming apparatus

The developing device includes a development container, a developer carrier, and a toner trapping mechanism. The development container includes a first conveyance chamber and a second conveyance chamber placed in parallel juxtaposition and communicated with each other at their longitudinal both end portions, and the development container contains a toner-containing developer to be fed to an image carrier. The toner trapping mechanism includes a duct, an air inlet port, a trapping filter, and a fan. The duct is connected to the second conveyance chamber, and allows air present in the second conveyance chamber to flow therethrough. The development container has an air vent opened in the first conveyance chamber and communicated with outside of the development container.

Developing device and image forming apparatus

The image forming apparatus includes a developing part and a vibration generating part. The vibration generating part vibrates a filter provided in the developing part. The developing part includes a development container, a developer carrier, and a toner trapping mechanism. The development container includes a first conveyance chamber and a second conveyance chamber placed in parallel juxtaposition. The toner trapping mechanism has a duct, an air inlet port, an air exhaust port, and a filter. The air inlet port is opened along the longitudinal direction of the second conveyance chamber so as to allow air present in the second conveyance chamber to flow into the duct. The vibration generating part is placed outside the developing part so as to be opposed to the development container and positioned on a downstream side in a developer conveyance direction of the second conveyance chamber.

Developing device provided with a toner trapping mechanism

Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered. A fixed magnet of the developer carrying member has a first pole that is arranged to face the filter, and a second pole and a third pole on a downstream side relative to the first pole. The first pole and the second pole have polarities opposite to each other, and the second pole and the third pole have a same polarity. A length of a gap between the developing container and an area where the developing sleeve faces the second pole among areas of the developing sleeve is smaller than a length between the developing sleeve and the filter.

Provided is an image forming apparatus that is capable of carrying out a scattered-toner recovery mode in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. A fixed magnet of the developer carrying member has a first pole that faces the image bearing member, a second pole that faces the filter, and an intermediate pole between the first pole and the second pole.

Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. An absolute value of a perpendicular-magnetic-force gradient of a fixed magnet of the developer carrying member is 4.0 mT/° or less at a position where the fixed magnet faces a central portion of the filter in a rotation direction of a developing sleeve.

An image forming apparatus includes an image carrier, a cleaning unit, a development device, and a control unit. The development device includes a toner collection mechanism having a developer carrier and a filter. The control unit is capable of executing a scattered toner recovery mode at non-image forming time, in which the filter is vibrated, a potential difference is generated in the direction for the toner to move from the developer carrier to the image carrier, the developer carrier is rotated in a reverse direction to that at image forming time, and the image carrier is rotated in the same direction as that at the image forming time, so that scattered toner, which has dropped from the filter and adhered to the developer carrier, is recovered by the cleaning unit via the image carrier.

An image forming apparatus includes a development device, and a control unit that controls the development device. The development device includes a toner collection mechanism having a duct, a filter, and an exhaust fan. The duct is connected to a conveyance chamber of the development container and allows air in the conveyance chamber to flow through. The filter is disposed at a connecting part between the duct and the conveyance chamber, and collects toner flowing into the duct from the conveyance chamber. The exhaust fan makes the air in the conveyance chamber flow to the outside via the duct. The control unit changes rotational frequency or operation frequency of the exhaust fan based on current detected by a current detection unit at non-image forming time.

A wireless power transmission system includes a power transmission device including a plurality of power transmission portions, and a power receiving object including a power receiving portion capable of receiving an electric power wirelessly transmitted from the power transmission portion. Of the plurality of power transmission portions, a specific power transmission portion transmits the electric power to the power receiving portion.

Wireless power transmission system

A mobile terminal power receiving modulewhich is housed together with a rechargeable batteryin a rechargeable battery packin a mobile terminal such as a smart phone, includes a sheet coilin which a coilconstituted by conductors is formed on a flexible circuit boardas a circuit pattern and a magnetic sheetmade of resin in which magnetic powder is dispersed.

Mobile terminal power receiving module utilizing wireless power transmission and mobile terminal rechargeable battery including mobile terminal power receiving module

A developing device includes a developing roller, a developer supply path, a developer conveyance path, a supply-side conveying member and an agitating-side conveying member. The developing roller is rotatably supported in the housing. The developer supply path is arranged along the developing roller. The developer conveyance path is arranged along the developer supply path. The supply-side conveying member is a conveying member arranged in the developer supply path and includes a first receiving portion arranged to face the communication path at an upstream side in the first direction and configured to receive the developer from the developer conveyance path, and has a hollow spiral shape at a side downstream of the first receiving portion. The agitating-side conveying member is a conveying member arranged in the developer conveyance path and includes a first transferring portion arranged to face the first receiving portion at a downstream side in the second direction.

Developing device comprising a conveying member having a hollow spiral shape and image forming apparatus provided with the same

A developing device includes a housing, a developing roller, a developer supply path, a developer conveyance path, a supply-side conveying member, an agitating side conveying member and first projection members. The developing roller is rotatably supported in the housing. The supply-side conveying member includes a supply-side spiral member formed by connecting spiral pieces, in the first direction and having a hollow interior formed by the connected spiral pieces and a first rib member extending in the first direction, is arranged in the developer supply path and conveys the developer in the first direction by being driven and rotated. The first projecting members extend in the first direction along an outer wall portion of the first rib member from a first area where the supply-side spiral member and the first rib member intersect and project radially outward in the rotation of the supply-side conveying member.

Developing device and image forming apparatus provided with same

A developing device includes: a developer container having first and second transport passages, for containing developer; a developer carrier for carrying, on its surface, developer inside the second transport passage; a first stirring/transporting member having a rotary shaft and a transport blade formed on its circumferential surface, for stirring/transporting developer inside the first transport passage; a second stirring/transporting member for stirring/transporting developer inside the second transport passage in a direction opposite to the first stirring/transporting member; a first developer passing portion for delivering developer from the first to the second transport passage; and a second developer passing portion for delivering developer from the second to the first transport passage. In a part of the first stirring/transporting member facing the first developer passing portion, a paddle portion is formed which is devoid of the rotary shaft and which has a plurality of first ribs parallel to the rotary shaft.

Developing device and image forming apparatus therewith

A conveyance device includes a housing, a formation member, and a detection section. The housing has a first conveyance path, a second conveyance path, and a first communication path. The first and second conveyance paths each are a conveyance path for conveying a developer. The first communication path allows a first end portion of the first conveyance path and a first end portion of the second conveyance path to be in communication with each other via a communication surface. The communication surface has a first region and a second region. The formation member forms the second region of the communication surface so that a height of the second region from a bottom portion of the first communication path is lower than a height of the first region from the bottom portion of the first communication path. The detection section detects the amount of the developer.

Conveyance device, development device including conveyance device, and image forming apparatus including development device

A developing device includes a first agitating member and a second agitating member. Each of the first and second agitating members includes a screw having a helical portion formed helically so as to define a hollow portion, and a plurality of ribs formed on the helical portion in the longitudinal direction of the screw. On at least one of the first and second agitating members, there is disposed a paddle opposed to the communicating portion on a downstream side in a transport direction of the developing powder. The paddle has a flat surface in a direction perpendicular to the longitudinal direction, and a width of a distal end of the paddle is smaller than a width of a proximal end of the paddle disposed to the agitating member in a plan view.

Developing device and image forming apparatus including the same

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Osaka, Japan

Hiroshi Yamazaki