Patents by Inventor Haruki Saitoh

Haruki Saitoh 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: 20200376856
    Abstract: A liquid discharge apparatus includes a liquid discharge head and a window. The liquid discharge head discharges a liquid onto a recording medium to form an image. The window is near the liquid discharge head. The image on the recording medium is visually recognizable through the window.
    Type: Application
    Filed: May 12, 2020
    Publication date: December 3, 2020
    Inventor: Haruki SAITOH
  • Patent number: 9586413
    Abstract: A treatment-object modifying device lowers a pH value of a surface of a treatment object by using dielectric-barrier discharge. The treatment-object modifying device includes discharge electrodes disposed over a conveying route of the treatment object; and a counter electrode disposed to face the discharge electrodes across the conveying route so as to correspond to the respective discharge electrodes. Each discharge electrode has a columnar shape or a cylindrical shape. Curved surfaces of the discharge electrodes faces the counter electrode. Curved surfaces of the discharge electrodes face one another. A distance between the adjacent discharge electrodes is equal to or less than 2 millimeters.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: March 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventor: Haruki Saitoh
  • Patent number: 9387696
    Abstract: A printing apparatus includes a plasma processing unit that processes a surface of a processing object by using plasma; a recording unit that forms a first-color image on the surface of the processing object by inkjet recording, the surface being plasma-processed by the plasma processing unit, and forms a second-color image to be superimposed on the first-color image by the inkjet recording; and an adjusting unit that adjusts a plasma energy amount that is to be applied to the processing object according to the second-color image.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: July 12, 2016
    Assignee: Ricoh Company,Ltd.
    Inventors: Hiroyuki Hiratsuka, Koji Nagai, Satoshi Katoh, Haruki Saitoh
  • Patent number: 9352589
    Abstract: A modification device includes: a plasma processing unit that performs plasma processing on a processed object such that a surface of the processed object has a predetermined water contact angle; and a cooling unit that cools the surface of the processed object at least from when the plasma processing is performed to when ink is discharged such that a surface temperature of the processed object during discharge of the ink to the processed object is a temperature at which a target water contact angle range is achieved.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: May 31, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Katoh, Kengo Tsubaki, Hiroyuki Hiratsuka, Haruki Saitoh
  • Patent number: 9308749
    Abstract: A treatment target reforming device decreases a pH value of a surface of a treatment target using a dielectric-barrier discharge. The treatment target reforming device includes: a discharge electrode and a counter electrode which are disposed so that a conveying path of the treatment target is interposed therebetween; and a power supply which applies a repetitive pulse voltage with an output voltage equal to or larger than 10 kVp-p and smaller than 13 kVp-p to the discharge electrode.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 12, 2016
    Assignee: Ricoh Company, Ltd.
    Inventor: Haruki Saitoh
  • Publication number: 20160096377
    Abstract: A modification device includes: a plasma processing unit that performs plasma processing on a processed object such that a surface of the processed object has a predetermined water contact angle; and a cooling unit that cools the surface of the processed object at least from when the plasma processing is performed to when ink is discharged such that a surface temperature of the processed object during discharge of the ink to the processed object is a temperature at which a target water contact angle range is achieved.
    Type: Application
    Filed: September 24, 2015
    Publication date: April 7, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Satoshi Katoh, Kengo Tsubaki, Hiroyuki Hiratsuka, Haruki Saitoh
  • Patent number: 9242482
    Abstract: A pH detecting device includes a supplying unit to supply a pH indicator, with an inkjet head, to a surface of a material to be processed on which acidification is performed; a color information detector to detect color information of the pH indicator supplied to the surface of the material; and a pH specifying unit to specify a pH value of the surface of the material based on the color information.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: January 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Haruki Saitoh, Koji Nagai, Hiroyuki Hiratsuka, Satoshi Katoh
  • Publication number: 20150258811
    Abstract: A printing apparatus includes a plasma processing unit that processes a surface of a processing object by using plasma; a recording unit that forms a first-color image on the surface of the processing object by inkjet recording, the surface being plasma-processed by the plasma processing unit, and forms a second-color image to be superimposed on the first-color image by the inkjet recording; and an adjusting unit that adjusts a plasma energy amount that is to be applied to the processing object according to the second-color image.
    Type: Application
    Filed: March 9, 2015
    Publication date: September 17, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroyuki Hiratsuka, Koji Nagai, Satoshi Katoh, Haruki Saitoh
  • Publication number: 20150258813
    Abstract: A pH detecting device includes a supplying unit to supply a pH indicator, with an inkjet head, to a surface of a material to be processed on which acidification is performed; a color information detector to detect color information of the pH indicator supplied to the surface of the material; and a pH specifying unit to specify a pH value of the surface of the material based on the color information.
    Type: Application
    Filed: March 9, 2015
    Publication date: September 17, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Haruki Saitoh, Koji Nagai, Hiroyuki Hiratsuka, Satoshi Katoh
  • Publication number: 20150138287
    Abstract: A treatment-object modifying device lowers a pH value of a surface of a treatment object by using dielectric-barrier discharge. The treatment-object modifying device includes discharge electrodes disposed over a conveying route of the treatment object; and a counter electrode disposed to face the discharge electrodes across the conveying route so as to correspond to the respective discharge electrodes. Each discharge electrode has a columnar shape or a cylindrical shape. Curved surfaces of the discharge electrodes faces the counter electrode. Curved surfaces of the discharge electrodes face one another. A distance between the adjacent discharge electrodes is equal to or less than 2 millimeters.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 21, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventor: Haruki Saitoh
  • Publication number: 20150077493
    Abstract: A treatment target reforming device decreases a pH value of a surface of a treatment target using a dielectric-barrier discharge. The treatment target reforming device includes: a discharge electrode and a counter electrode which are disposed so that a conveying path of the treatment target is interposed therebetween; and a power supply which applies a repetitive pulse voltage with an output voltage equal to or larger than 10 kVp-p and smaller than 13 kVp-p to the discharge electrode.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 19, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventor: Haruki Saitoh
  • Publication number: 20130250017
    Abstract: A recording medium surface property modifying apparatus is disclosed. The recording medium surface property modifying apparatus includes a conveying unit which conveys a recording medium in a predetermined direction; a discharging electrode which rotates and comes into contact with a face to be treated of the recording medium which is conveyed by the conveying unit to cause the face to be treated to be in contact with plasma to modify a surface property of the recording medium; and a hollow-shaped cover member which covers a plasma treatment unit which includes the discharging electrode, the recording medium surface property modifying apparatus further including a humidity control unit which controls, in advance, humidity of the plasma treatment unit in alignment with acidity of the recording medium which undergoes the surface property modifying treatment.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 26, 2013
    Inventors: Haruki SAITOH, Hijiri Ogata, Takehiro Nakamura, Masaru Hoshina
  • Patent number: 8364065
    Abstract: An image forming apparatus is disclosed, including: a toner image forming unit which forms a toner image on a surface of a transfer material, the toner image being an image formed of toner, the toner containing wax; a fixing device which fixes the toner image using a fixing member on which a mold release agent including oil is applied; and a surface processing device which processes the fixed surface of the transfer material, on which surface the toner image is fixed using the fixing member on which the mold release agent including the oil is applied, wherein the surface processing device further includes a discharging unit which generates a discharge on or near the fixed surface of the transfer material, on which surface the fixed toner image is formed.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: January 29, 2013
    Assignees: Ricoh Company, Ltd., Tohoku Ricoh Co., Ltd.
    Inventors: Takashi Bisaiji, Yasutada Shitara, Hijiri Ogata, Haruki Saitoh
  • Publication number: 20120141181
    Abstract: A surface treating apparatus configured to treat a surface of a transfer material includes a discharge part configured to cause dielectric barrier discharge on or near the surface of the transfer material where a toner image is to be formed on the surface and to cause the surface of the transfer material to be directly exposed to the dielectric barrier discharge, so as to increase the wettability of the surface of the transfer material with respect to toner for forming the toner image.
    Type: Application
    Filed: November 29, 2011
    Publication date: June 7, 2012
    Inventors: Takashi BISAIJI, Hijiri Ogata, Haruki Saitoh
  • Patent number: 8186823
    Abstract: An inkjet recording method including: (i) exposing a surface of a recording medium to non-thermal atmospheric pressure plasma so as to hydrophilize the surface of the recording medium, and (ii) applying a stimulus to an ink composition so as to eject the ink composition to form an image on the recording medium, wherein the ink composition contains at least one of a pigment/water-dispersible resin particle mixture in which a pigment is dispersed along with water-dispersible resin particles and colored water-dispersible resin particles each of which is a water-dispersible resin particle which is colored.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: May 29, 2012
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventors: Haruki Saitoh, Hijiri Ogata
  • Publication number: 20110064489
    Abstract: An image forming apparatus is disclosed, including: a toner image forming unit which forms a toner image on a surface of a transfer material, the toner image being an image formed of toner, the toner containing wax; a fixing device which fixes the toner image using a fixing member on which a mold release agent including oil is applied; and a surface processing device which processes the fixed surface of the transfer material, on which surface the toner image is fixed using the fixing member on which the mold release agent including the oil is applied, wherein the surface processing device further includes a discharging unit which generates a discharge on or near the fixed surface of the transfer material, on which surface the fixed toner image is formed.
    Type: Application
    Filed: September 13, 2010
    Publication date: March 17, 2011
    Inventors: Takashi Bisaiji, Yasutada Shitara, Hijiri Ogata, Haruki Saitoh
  • Patent number: 7758178
    Abstract: To provide a highly human- and environment-friendly ink fixing method that is excellent in energy efficiency, operability and ink-fixing property and has a simple process, an ink fixing apparatus that is excellent in energy efficiency, operability and ink-fixing property and is a highly human- and environment-friendly, simple and compact apparatus, and a printer that is equipped with the ink fixing apparatus and can provide high-quality images at low cost. The ink fixing apparatus of the present invention includes at least fixing a print ink to a base material using a discharge generated between electrodes under pressure close to atmospheric pressure, wherein the print ink includes at least a non-volatile organic compound bearing a carboxylic group and includes no photopolymerization initiators.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: July 20, 2010
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventors: Haruki Saitoh, Hijiri Ogata, Masahiro Noguchi
  • Publication number: 20090290007
    Abstract: An inkjet recording method including: (i) exposing a surface of a recording medium to non-thermal atmospheric pressure plasma so as to hydrophilize the surface of the recording medium, and (ii) applying a stimulus to an ink composition so as to eject the ink composition to form an image on the recording medium, wherein the ink composition contains at least one of a pigment/water-dispersible resin particle mixture in which a pigment is dispersed along with water-dispersible resin particles and colored water-dispersible resin particles each of which is a water-dispersible resin particle which is colored.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 26, 2009
    Applicant: Tohoku Ricoh Co., Ltd.
    Inventors: Haruki Saitoh, Hijiri Ogata
  • Publication number: 20070058019
    Abstract: To provide a highly human- and environment-friendly ink fixing method that is excellent in energy efficiency, operability and ink-fixing property and has a simple process, an ink fixing apparatus that is excellent in energy efficiency, operability and ink-fixing property and is a highly human- and environment-friendly, simple and compact apparatus, and a printer that is equipped with the ink fixing apparatus and can provide high-quality images at low cost. The ink fixing apparatus of the present invention includes at least fixing a print ink to a base material using a discharge generated between electrodes under pressure close to atmospheric pressure, wherein the print ink includes at least a non-volatile organic compound bearing a carboxylic group and includes no photopolymerization initiators.
    Type: Application
    Filed: September 8, 2006
    Publication date: March 15, 2007
    Applicant: Tohoku Ricoh Co., Ltd.
    Inventors: Haruki Saitoh, Hijiri Ogata, Masahiro Noguchi