Patents by Inventor Yoshihiro Fujiwara

Yoshihiro Fujiwara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140376970
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Application
    Filed: September 10, 2014
    Publication date: December 25, 2014
    Inventors: Hideki KIMURA, Kunihiro OHYAMA, Masayuki YAMANE, Yoshihiro FUJIWARA, Masaki TAKAHASHI, Toshiki HAYASHI
  • Patent number: 8909095
    Abstract: A process cartridge installed in a body of an image forming apparatus includes an image bearer, a development device that includes a developer bearer, a rotary developer conveyance member, and a shaft projecting from a development casing in an axial direction, a gear train including an idler gear provided to the shaft projecting from the development casing, a first side plate, and a hollow shaft projecting in the axial direction from the first side plate. The first side plate includes an image bearer positioning portion and a developer bearer positioning portion to support axial end portions of the developer bearer and the image bearer, the shaft projecting from the development casing is inserted into a recess inside the hollow shaft, and the hollow shaft is inserted into a hollow shaft positioning hole formed in the body.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: December 9, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Yamane, Kunihiro Ohyama, Hideki Kimura, Masaki Takahashi, Yoshihiro Fujiwara, Toshiki Hayashi
  • Patent number: 8873979
    Abstract: A development device includes a developer container for containing developer, a developer bearer to carry by rotation the developer contained in the developer container to a development range facing a latent image bearer, a partition dividing the developer container into an upper compartment and a lower compartment arranged vertically, an upper developer conveyance member disposed in the upper compartment, a lower developer conveyance member disposed in the lower compartment, a communication portion through which the developer moves from the lower compartment to the upper compartment, disposed in a downstream end portion of the lower compartment in a direction in which the lower developer conveyance member transports the developer, and a toner concentration detector to detect a concentration of toner in the developer beneath the communication portion inside the lower compartment.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Fujiwara, Kunihiro Ohyama, Masayuki Yamane, Hideki Kimura, Masaki Takahashi, Toshiki Hayashi
  • Patent number: 8855536
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Kimura, Kunihiro Ohyama, Masayuki Yamane, Yoshihiro Fujiwara, Masaki Takahashi, Toshiki Hayashi
  • Publication number: 20140270838
    Abstract: A developing device includes a developer bearer to carry developer, disposed facing an image bearer, a developer conveyance member disposed facing the developer bearer, to agitate and supply developer to the developer bearer, a decompression portion surrounded by upper walls of the developing device and including multiple vents arranged in a longitudinal direction of the developing device and a filter. A number of the multiple vents is greater in either end portion than in a center portion in the longitudinal direction of the developing device.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 18, 2014
    Inventors: Hideo Yoshizawa, Noriyuki Kimura, Yoshihiro Fujiwara, Yuki Oshikawa, Sohichi Abe
  • Patent number: 8816310
    Abstract: A semiconductor relay includes two MOSFETs; a light emitting element; a light-receiving drive element for switching on and off the two MOSFETs; two output and two input conductor plates electrically connected to the two MOSFETs and the light emitting element, respectively; and an encapsulating resin encapsulating the two MOSFETs, the light emitting element, the light-receiving drive element, the two output and the two input conductor plates. The two output and two input conductor plates includes terminal portions which protrude outside the encapsulating resin and are mounted on a common printed circuit board. Further, the two output conductor plates includes mount portions on which the two MOSFETs are mounted or on which drain electrodes of the two MOSFETs are connected, and the mount portions are encapsulated by the encapsulating resin in such an orientation that a thickness direction of the mount portions intersects that of the printed circuit board.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 26, 2014
    Assignee: Panasonic Corporation
    Inventors: Narutoshi Hoshino, Yoshihiro Fujiwara, Takashi Shibano, Shinsuke Taka
  • Publication number: 20140233984
    Abstract: A development device can include a developer containing part containing developer, a carrier to carry developer that is supplied from the developer containing part to a development range, a partition dividing the developer containing part into a supply part and a circulation part beneath the supply part to collect developer from the carrier, a first transport member in the supply part of the developer containing part to supply developer from the supply part to the carrier, and a second transport member in the circulation part to transport developer in the circulation part in an axial direction of the carrier. The device can also include a removable seal member, which seals a supplied-developer and/or a collected-developer communicating area.
    Type: Application
    Filed: April 25, 2014
    Publication date: August 21, 2014
    Inventors: Yasuo MIYOSHI, Norio Kudo, Yoshihiro Fujiwara, Tsukuru Kai, Hiroshi Hosokawa, Hiroaki Okamoto
  • Patent number: 8765115
    Abstract: Providing a new method of treating inflammatory gastrointestinal disorders and a food product for the prevention or improvement of inflammatory gastrointestinal disorders. Prevention or treatment of inflammatory gastrointestinal disorders is possible by oral administration of recombinant IL-10 expressed in rice plant seeds.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: July 1, 2014
    Assignees: National Institute of Agrobiological Scienses, Preventec, Inc., National Institute of Advance Industrial Science & Technology
    Inventors: Yoshihiro Fujiwara, Kenji Sekikawa, Fumio Takaiwa, Noriko Tsuji
  • Patent number: 8759617
    Abstract: Extraction and purification of recombinant proteins rendered difficult to extract from transgenic plants by using an extraction solution containing reducing agents and surfactants or an extraction solution containing reducing agents and organic solvents.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: June 24, 2014
    Assignees: National Institute of Agrobiological Sciences, Preventec, Inc.
    Inventors: Yoshihiro Fujiwara, Kenji Sekikawa, Yasuhiko Aiki, Fumio Takaiwa, Lijun Yang
  • Patent number: 8750752
    Abstract: A development device can include a developer containing part containing developer, a carrier to carry developer that is supplied from the developer containing part to a development range, a partition dividing the developer containing part into a supply part and a circulation part beneath the supply part to collect developer from the carrier, a first transport member in the supply part of the developer containing part to supply developer from the supply part to the carrier, and a second transport member in the circulation part to transport developer in the circulation part in an axial direction of the carrier. The device can also include a removable seal member, which seals a supplied-developer and/or a collected-developer communicating area.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: June 10, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Yasuo Miyoshi, Norio Kudo, Yoshihiro Fujiwara, Tsukuru Kai, Hiroshi Hosokawa, Hiroaki Okamoto
  • Patent number: 8649714
    Abstract: A development device includes a developer bearer to carry by rotation two-component developer to a development range to develop a latent image formed on a latent image bearer, a magnetic field generator disposed inside the developer bearer, a developer regulator for adjusting an amount of the developer on the developer bearer, positioned upstream from the development range in a rotational direction of the developer bearer and facing the developer bearer across a regulation gap, a supply compartment from which the developer is supplied by a developer agitator to the developer bearer, a collection compartment, a pre-regulation portion adjacent to and upstream from the developer regulator in the rotational direction of the developer bearer, and a developer mobility adjuster that makes mobility of the developer in the pre-regulation portion higher on an upstream side in a developer conveyance direction in the supply compartment.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Norio Kudo, Yasuo Miyoshi, Hiroshi Hosokawa, Yoshihiro Fujiwara, Hiroaki Okamoto
  • Publication number: 20140016960
    Abstract: A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier.
    Type: Application
    Filed: September 18, 2013
    Publication date: January 16, 2014
    Inventors: Yasuo MIYOSHI, Norio KUDO, Yoshihiro FUJIWARA, Tsukuru KAI, Hiroshi HOSOKAWA, Hiroaki OKAMOTO
  • Patent number: 8571449
    Abstract: A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: October 29, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Yasuo Miyoshi, Norio Kudo, Yoshihiro Fujiwara, Tsukuru Kai, Hiroshi Hosokawa, Hiroaki Okamoto
  • Patent number: 8457516
    Abstract: An image forming apparatus includes an image carrier, an image forming member, a transferer, a toner image detector, and a controller. The transferer transfers the toner image from the image carrier directly or indirectly onto a recording medium transported by a surface moving member. The toner image detector detects a test toner image formed in a test toner image detection area located at an end portion of the surface moving member. The controller checks a length of the recording medium in a main scanning direction during continuous image formation, and forms the test toner image either in a space between recording media when the length of the recording medium exceeds a length of the surface moving member minus a length of the test toner image detection area in the main scanning direction or otherwise in parallel to the toner image transferred onto the recording medium.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: June 4, 2013
    Assignee: Ricoh Company, Limited
    Inventor: Yoshihiro Fujiwara
  • Patent number: 8433224
    Abstract: A development device includes a developer carrier, a supply compartment having a downstream end portion positioned outside the development area in the axial direction of the developer carrier, a collection compartment disposed lower than the supply compartment, first and second communication ports respectively formed in the downstream end portion and an upstream end portion of the supply compartment, a developer circulation unit including first and second developer conveyance members respectively provided in the supply compartment and the collection compartment, a toner supply port formed in an upper portion of the downstream end portion of the supply compartment, and an airflow path limiter provided in the downstream end portion of the supply compartment, closer to the development area than the toner supply port in the axial direction of the developer carrier, to restrict an airflow path above the developer in the downstream end portion of the supply compartment.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 30, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Yoshihiro Fujiwara, Yasuo Miyoshi, Hiroshi Hosokawa, Norio Kudo, Hiroaki Okamoto
  • Publication number: 20130064570
    Abstract: A process cartridge installed in a body of an image forming apparatus includes an image bearer, a development device that includes a developer bearer, a rotary developer conveyance member, and a shaft projecting from a development casing in an axial direction, a gear train including an idler gear provided to the shaft projecting from the development casing, a first side plate, and a hollow shaft projecting in the axial direction from the first side plate. The first side plate includes an image bearer positioning portion and a developer bearer positioning portion to support axial end portions of the developer bearer and the image bearer, the shaft projecting from the development casing is inserted into a recess inside the hollow shaft, and the hollow shaft is inserted into a hollow shaft positioning hole formed in the body.
    Type: Application
    Filed: August 17, 2012
    Publication date: March 14, 2013
    Inventors: Masayuki YAMANE, Kunihiro Ohyama, Hideki Kimura, Masaki Takahashi, Yoshihiro Fujiwara, Toshiki Hayashi
  • Publication number: 20130045029
    Abstract: A development device includes a development casing, a developer bearer, a first developer conveyance member to supply developer to the developer bearer, a second developer conveyance member to transport developer axially, and a partition dividing an interior of the development casing into a supply channel and a collecting channel via which developer received from a downstream end portion of the supply channel is forwarded to an upstream end portion of the supply channel. The supply channel includes a conveyance area and a buffer area disposed adjacent to the conveyance area in a direction perpendicular to an axial direction to temporarily retain developer and midway in the developer conveyance direction inside the supply channel, and an upstream end face defining an upstream end of the buffer area is inclined relative to the axial direction to draw away from the conveyance area downstream in the developer conveyance direction.
    Type: Application
    Filed: July 24, 2012
    Publication date: February 21, 2013
    Inventors: Hideki KIMURA, Kunihiro OHYAMA, Masayuki YAMANE, Yoshihiro FUJIWARA, Masaki TAKAHASHI, Toshiki HAYASHI
  • Publication number: 20120328561
    Abstract: Providing a new method of treating inflammatory gastrointestinal disorders and a food product for the prevention or improvement of inflammatory gastrointestinal disorders. Prevention or treatment of inflammatory gastrointestinal disorders is possible by oral administration of recombinant IL-10 expressed in rice plant seeds.
    Type: Application
    Filed: November 30, 2011
    Publication date: December 27, 2012
    Applicants: National Institute of Agrobiological Sciences, National Institute of Advanced Industrial Science and Technology, Preven Tec, Inc.
    Inventors: Yoshihiro Fujiwara, Kenji Sekikawa, Fumio Takaiwa, Noriko Tsuji
  • Patent number: 8326184
    Abstract: A development device includes a developer container internally divided by a partition into a supply path and a recovery path, a developer bearing member, a supply conveyance member to apply force to convey developer to a developer retaining space through the supply path, the developer retaining space retaining the developer to be conveyed by the developer bearing member, a recovery conveyance member, a communication pathway provided between the supply path and the developer retaining space, the communication pathway passing the developer from the supply path to the developer retaining space, and a developer softening member to soften the developer that is present above the partition, provided at least one of at a position in the communication pathway and at a position close to the communication pathway.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: December 4, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Norio Kudo, Yasuo Miyoshi, Hiroshi Hosokawa, Yoshihiro Fujiwara, Hiroaki Okamoto
  • Patent number: 8326180
    Abstract: A development device to develop a latent image with two-component developer includes a developer carrier disposed facing the image carrier, to carry the developer, a magnetic field generator disposed inside the developer carrier, to form multiple magnetic poles around the developer carrier, an interior wall dividing the interior of the development device into a first transport chamber and a second transport chamber parallel to the first transport chamber, a first transport member disposed in the first transport chamber, facing the developer carrier, to supply the developer to the developer carrier while transporting the developer longitudinally, a second transport member disposed in the second transport chamber, facing the developer carrier, to transport the developer separated from the developer carrier longitudinally, a partition disposed between the developer carrier and the second transport member to prevent resupply of the used developer in the second transport chamber from to the developer carrier.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: December 4, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Yoshihiro Fujiwara, Yasuo Miyoshi, Takuya Seshita, Norio Kudo