Patents by Inventor Yoshitaka Akiyama

Yoshitaka Akiyama 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: 20210155015
    Abstract: A printer includes a treatment liquid applier configured to apply a treatment liquid onto a sheet, a printing device configured to print on the sheet onto which the treatment liquid has been applied, a heater configured to heat the treatment liquid in the treatment liquid applier, and circuitry configured to control the heater according to a printing condition to print on the sheet.
    Type: Application
    Filed: September 22, 2020
    Publication date: May 27, 2021
    Inventor: Yoshitaka AKIYAMA
  • Publication number: 20190092130
    Abstract: A refrigeration cycle device includes: a variable displacement compressor including a discharge capacity varying part to change a refrigerant discharge capacity; a controller that outputs a capacity control signal to the variable displacement compressor to change the refrigerant discharge capacity; a heat exchanger that condenses or cools refrigerant discharged from the variable displacement compressor; a decompressor that decompresses and expands refrigerant flowing out of the heat exchanger; an evaporator that evaporates refrigerant decompressed and expanded by the decompressor; and a high load determiner that determines whether the compressor is in a high load operational status based on the capacity control signal.
    Type: Application
    Filed: March 10, 2017
    Publication date: March 28, 2019
    Inventors: Masato KOMURA, Toru OKUMA, Yoshitaka AKIYAMA, Yusuke ITO
  • Patent number: 10124618
    Abstract: An inspection apparatus includes a liquid discharge head and a first light source. The liquid discharge head is configured to discharge a transparent liquid onto a discharged object. The first light source is configured to irradiate a pattern formed by the transparent liquid discharged onto the discharged object with light having a single peak wavelength to cause a difference between brightness and darkness.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: November 13, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Yoshinari Suzuki, Honriku Jo
  • Publication number: 20170232770
    Abstract: An inspection apparatus includes a liquid discharge head and a first light source. The liquid discharge head is configured to discharge a transparent liquid onto a discharged object. The first light source is configured to irradiate a pattern formed by the transparent liquid discharged onto the discharged object with light having a single peak wavelength to cause a difference between brightness and darkness.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 17, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Yoshinari Suzuki, Honriku Jo
  • Patent number: 9290005
    Abstract: An image formation apparatus includes a first discharge unit to form an image on a recording medium; and a second discharge unit including a nozzle line that discharges transparent droplets on the image formed on the recording medium. The second discharge unit moves in a first direction relative to the recording medium and the nozzle line has nozzles in a second direction orthogonal to the first direction. After the image formation, the second discharge unit discharges the transparent droplets from the nozzles spaced at m?1 nozzle intervals to form a row of dots in the second direction, and repeats the forming while moving to form m rows in the first direction, such that the dots in the rows are formed at m?1 nozzle intervals and positions of the dots between n-th and n?1-th rows are displaced together by one nozzle in the second direction.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Ryuuta Katoh, Kazuki Yasu, Yoshinari Suzuki
  • Publication number: 20160075146
    Abstract: An image formation apparatus includes a first discharge unit to form an image on a recording medium; and a second discharge unit including a nozzle line that discharges transparent droplets on the image formed on the recording medium. The second discharge unit moves in a first direction relative to the recording medium and the nozzle line has nozzles in a second direction orthogonal to the first direction. After the image formation, the second discharge unit discharges the transparent droplets from the nozzles spaced at m?1 nozzle intervals to form a row of dots in the second direction, and repeats the forming while moving to form m rows in the first direction, such that the dots in the rows are formed at m?1 nozzle intervals and positions of the dots between n-th and n?1-th rows are displaced together by one nozzle in the second direction.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 17, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshitaka Akiyama, Ryuuta Katoh, Kazuki Yasu, Yoshinari Suzuki
  • Patent number: 9254683
    Abstract: An image forming apparatus discharges ink onto a recording medium to form an image on a surface of the recording medium. The image forming apparatus includes a preprocessing unit that applies preprocess liquid on the surface of the recording medium before the image is formed; and a postprocessing unit that applies postprocess liquid, which is different from the preprocess liquid, onto the recording medium after the image is formed. An application quantity of the preprocess liquid is determined based at least on a kind of the ink, and an application quantity of the postprocess liquid is determined based at least on the kind of the ink.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: February 9, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Yoshinari Suzuki, Yukihito Niino, Kazuki Yasu, Seiya Murata, Honriku Jo
  • Publication number: 20140253651
    Abstract: An image forming apparatus discharges ink onto a recording medium to form an image on a surface of the recording medium. The image forming apparatus includes a preprocessing unit that applies preprocess liquid on the surface of the recording medium before the image is formed; and a postprocessing unit that applies postprocess liquid, which is different from the preprocess liquid, onto the recording medium after the image is formed. An application quantity of the preprocess liquid is determined based at least on a kind of the ink, and an application quantity of the postprocess liquid is determined based at least on the kind of the ink.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 11, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshitaka Akiyama, Yoshinari Suzuki, Yukihito Niino, Kazuki Yasu, Seiya Murata, Honriku Jo
  • Patent number: 8480213
    Abstract: A liquid containing tank for containing a liquid to be supplied to a liquid-jet head. The liquid containing tank includes a containing part containing the liquid supplied from the outside; and a supply channel separated from the containing part by a partition wall rising from the bottom surface of the containing part and supplying the liquid from the containing part to the liquid-jet head. The containing part includes a first region and a second region, the flow speed of the liquid in the first region of the containing part is lower than the flow speed of the liquid in the second region of the containing part, and the horizontal cross sectional area of the first region of the containing part is less than the horizontal cross sectional area of the second region of the containing part.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: July 9, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Hirotaka Kobayashi, Mitsuru Kawakami
  • Patent number: 8337002
    Abstract: An ink ejection head unit includes a head that ejects ink drops from plural two nozzles. The head includes a common liquid chamber connected to the plural nozzles. The common liquid chamber has a supply opening and an ejection opening. A tank is connected to the head and includes an ink containing section that contains ink to be supplied to the head. Also included is a supply path to supply the ink from the ink containing section to the supply opening of the head. An ejection path is provided to eject the ink ejected from the ejection opening of the head to an outside of the ink ejection head unit. A communication path is also provided to communicate the highest section of a seal of the containing section with the ejection path higher than the highest section of the seal. A fluid resistance of the communication path is larger than the total fluid resistance of a path starting from the supply opening to the ejection opening.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: December 25, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Hirotaka Kobayashi, Mitsuru Kawakami
  • Publication number: 20110128334
    Abstract: A liquid containing tank for containing a liquid to be supplied to a liquid-jet head. The liquid containing tank includes a containing part containing the liquid supplied from the outside; and a supply channel separated from the containing part by a partition wall rising from the bottom surface of the containing part and supplying the liquid from the containing part to the liquid-jet head. The containing part includes a first region and a second region, the flow speed of the liquid in the first region of the containing part is lower than the flow speed of the liquid in the second region of the containing part, and the horizontal cross sectional area of the first region of the containing part is less than the horizontal cross sectional area of the second region of the containing part.
    Type: Application
    Filed: November 12, 2010
    Publication date: June 2, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshitaka AKIYAMA, Hirotaka Kobayashi, Mitsuru Kawakami
  • Publication number: 20100328408
    Abstract: An ink ejection head unit includes a head that ejects ink drops from plural two nozzles. The head includes a common liquid chamber connected to the plural nozzles. The common liquid chamber has a supply opening and an ejection opening. A tank is connected to the head and includes an ink containing section that contains ink to be supplied to the head. Also included is a supply path to supply the ink from the ink containing section to the supply opening of the head. An ejection path is provided to eject the ink ejected from the ejection opening of the head to an outside of the ink ejection head unit. A communication path is also provided to communicate the highest section of a seal of the containing section with the ejection path higher than the highest section of the seal. A fluid resistance of the communication path is larger than the total fluid resistance of a path starting from the supply opening to the ejection opening.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 30, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshitaka AKIYAMA, Hirotaka Kobayashi, Mitsuru Kawakami
  • Patent number: 7413294
    Abstract: An inkjet head includes a common ink puddle section, a nozzle plate having a plurality of nozzle orifices, an ink flow channel substrate having grooves communicating from the common ink puddle section to the nozzle orifices, and being formed alternatively in front and back surfaces of the ink flow channel substrate, to end sections of the grooves the nozzle plate being fixed, a chamber plate being stacked on the ink flow channel substrate, and having pressure generation chambers corresponding to the nozzle orifices, a diaphragm stacking on the chamber plate opposite from the ink flow channel substrate, a pressure generator provided on the diaphragm for the respective pressure generation chambers to generate a change in an internal pressure. Preferably, a volumetric capacity of the pressure generation chambers is changed in accordance with a change in the pressure, to eject an ink droplet from the nozzle orifice.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: August 19, 2008
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
  • Publication number: 20080050260
    Abstract: A scroll compressor is disclosed. A plurality of grooves (85) communicating with each other are formed on a sliding surface of a thrust bearing (53) subjected to the axial force received by a movable scroll (32). The areas surrounded by the plurality of the grooves (85) make up a plurality of insular pressure receiving portions (83) independent of each other. The pressure receiving portions (83) represent at least one half of the area of the sliding surface.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 28, 2008
    Applicants: DENSO CORPORATION, NIPPON SOKEN INC.
    Inventors: Shigeki Iwanami, Sanemasa Kawabata, Tadashi Hotta, Takashi Inoue, Shigeru Kawano, Masato Komura, Yoshitaka Akiyama
  • Patent number: 7131718
    Abstract: A housing of inkjet head has a projection that is formed with a plurality of opening grooves defined between adjacent two of projecting parts, and tip ends of the projecting parts are fixed to a diaphragm plate. Piezoelectric elements are inserted in respective opening grooves and fixed to a diaphragm of the diaphragm plate at positions opposite respective pressure chambers.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: November 7, 2006
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Ryouta Matsufuji, Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
  • Publication number: 20060187274
    Abstract: A chamber support plate of an inkjet head is formed as a member different from a housing. The chamber support plate is formed with a plurality of grooves at high density by a dicing saw or the like. Piezoelectric elements are inserted into the grooves and adhered to a chamber plate. The plurality of grooves define comb teeth portions, which support the chamber plate at positions between adjacent piezoelectric elements.
    Type: Application
    Filed: March 16, 2006
    Publication date: August 24, 2006
    Inventors: Osamu Machida, Tomohiko Koda, Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
  • Patent number: 7090340
    Abstract: An inkjet recording head includes: a nozzle plate having nozzles arranged in a row; a plurality of pressure generating chambers communicating to the nozzles, the plurality of pressure generating chambers including a first pressure generating chamber and a second pressure generating chamber; a diaphragm formed on one face of the pressure generating chamber; a common ink chamber for supplying the ink to the plurality of pressure generating chambers; and a piezoelectric element for displacing the diaphragm. The first pressure generating chamber is disposed on one side of the nozzles and a second pressure generating chamber is disposed on the other side. The first and second pressure generating chambers are opposed to each other across the nozzles so that the central lines of the first and second pressure generating chambers are almost coincident.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: August 15, 2006
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
  • Patent number: 7077511
    Abstract: A chamber support plate of an inkjet head is formed as a member different from a housing. The chamber support plate is formed with a plurality of grooves at high density by a dicing saw or the like. Piezoelectric elements are inserted into the grooves and adhered to a chamber plate. The plurality of grooves define comb teeth portions, which support the chamber plate at positions between adjacent piezoelectric elements.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: July 18, 2006
    Assignee: Ricoh Printing Systems Ltd.
    Inventors: Osamu Machida, Tomohiko Koda, Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
  • Publication number: 20050123428
    Abstract: A scroll compressor providing a ring-shaped groove in an end plate of a movable scroll to form a backpressure chamber with a surface of a middle housing supporting the end plate and introducing a high-pressure fluid through the same so as to cancel out a thrust load generated by the compression reaction force. Inner and outer seal rings are provided to prevent leakage of the high-pressure fluid from the backpressure chamber. In this case, the seal rings are designed to be able to incline in the ring-shaped groove or O-rings are made joint use of to form a ring-shaped region of a higher contact pressure at a portion contacting the opposing surface, so a high sealing effect is obtained while suppressing mechanical loss.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 9, 2005
    Inventors: Kazuhide Uchida, Yoshitaka Akiyama, Haruo Kamiya
  • Patent number: 6890163
    Abstract: A scroll compressor providing a ring-shaped groove in an end plate of a movable scroll to form a backpressure chamber with a surface of a middle housing supporting the end plate and introducing a high-pressure fluid through the same so as to cancel out a thrust load generated by the compression reaction force. Inner and outer seal rings are provided to prevent leakage of the high-pressure fluid from the backpressure chamber. In this case, the seal rings are designed to be able to incline in the ring-shaped groove or O-rings are made joint use of to form a ring-shaped region of a higher contact pressure at a portion contacting the opposing surface, so a high sealing effect is obtained while suppressing mechanical loss.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 10, 2005
    Assignees: Nippon Soken, Inc., Denso Corporation
    Inventors: Kazuhide Uchida, Yoshitaka Akiyama, Haruo Kamiya