Patents by Inventor Noriaki Okazawa

Noriaki Okazawa 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: 20070263045
    Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 15, 2007
    Inventor: Noriaki Okazawa
  • Patent number: 7229162
    Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: June 12, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Noriaki Okazawa
  • Publication number: 20060201908
    Abstract: A method of producing a liquid ejection head comprising: a flow path forming substrate in which a space including pressure generating chambers and an ink reserving chamber is formed; a nozzle plate which is stacked on one face of the flow path forming substrate; and a vibration plate which is stacked on the other face of the flow path forming substrate is provided. The flow path forming substrate is formed by a monocrystal silicon substrate in which a plane of crystal plane orientation of (110) is the surface.
    Type: Application
    Filed: February 21, 2006
    Publication date: September 14, 2006
    Inventors: Noriaki Okazawa, Nobuhiko Yamauchi, Sumio Arai
  • Publication number: 20060196824
    Abstract: A first sheet and a second sheet are prepared. First holes on the first sheet are perforated. The second sheet is laminated on the first sheet so as to cover at least the first holes and to form a laminated body. The filters are punched from the laminated body such that each of the filters comprises the first sheet formed with at least one of the first holes and the second sheet.
    Type: Application
    Filed: February 15, 2006
    Publication date: September 7, 2006
    Inventors: Noriaki Okazawa, Takashi Akase
  • Patent number: 7102273
    Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric layers therebetween. The first internal electrode layers are exposed to at least a first end face of the substrate, and the second internal electrode layers are exposed to at least a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. The first external electrode layer is electrically connected to the first internal electrode layers. A second external electrode layer is formed on at least the second end face and the third end face. The second external electrode layer is electrically connected to the second internal electrode layers, and is electrically independent from the first external electrode layer.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: September 5, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Munehide Kanaya, Tsuyoshi Kitahara, Noriaki Okazawa
  • Publication number: 20060164467
    Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.
    Type: Application
    Filed: December 21, 2005
    Publication date: July 27, 2006
    Inventors: Hirokazu Shibuya, Yasunori Koike, Noriaki Okazawa, Katsuhiro Okubo, Gaku Ko, Tatsuo Akatsu, Takateru Yamashita
  • Patent number: 7070263
    Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: July 4, 2006
    Assignee: Seiko Epson Corporation
    Inventor: Noriaki Okazawa
  • Patent number: 7028377
    Abstract: A method of producing an ink jet recording head, which includes (1) fixing a passage unit in which a nozzle pate having a nozzle opening, a spacer forming a common ink chamber, and an elastic plate having a thick portion abutting against an end of a piezoelectric vibrating element are stacked, to an opening of a frame having an overhang portion which overhangs to a vicinity of the thick portion, (2) inserting a vibrating element unit into the frame, the vibrating element unit being configured by fixing piezoelectric vibrating elements operating in a longitudinal vibration mode to a fixing substrate, and (3) injecting an adhesive into a groove formed in a region opposing the fixing substrate of the frame.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: April 18, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Shinji Yasukawa, Minoru Usui, Takahiro Naka, Tsuyoshi Kitahara, Noriaki Okazawa, Hideaki Sonehara
  • Patent number: 7009327
    Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: March 7, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Noriaki Okazawa, Munehide Kanaya, Tsuyoshi Kitahara
  • Publication number: 20050134645
    Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.
    Type: Application
    Filed: February 1, 2005
    Publication date: June 23, 2005
    Inventor: Noriaki Okazawa
  • Patent number: 6878609
    Abstract: In order to provide a silicon wafer break pattern that stabilizes the location and shape of the breaks at weak spots of the break pattern and that reduces waste, the through-holes of the break pattern is disposed along a scribe line, a first group of the through-holes are substantially disposed on only a first side of the scribe line, and a second group of the through-holes are substantially disposed on only a second side of the scribe line.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: April 12, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Akihisa Wanibe, Noriaki Okazawa, Yoshinao Miyata, Toshinao Shinbo, Tetsuya Akasu, Hisashi Akachi
  • Publication number: 20040256955
    Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction.
    Type: Application
    Filed: April 2, 2004
    Publication date: December 23, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Noriaki Okazawa, Munehide Kanaya, Tsuyoshi Kitahara
  • Publication number: 20040251783
    Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric layers therebetween. The first internal electrode layers are exposed to at least a first end face of the substrate, and the second internal electrode layers are exposed to at least a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. The first external electrode layer is electrically connected to the first internal electrode layers A second external electrode layer is formed on at least the second end face and the third end face. The second external electrode layer is electrically connected to the second internal electrode layers, and is electrically independent from the first external electrode layer.
    Type: Application
    Filed: March 4, 2004
    Publication date: December 16, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Munehide Kanaya, Tsuyoshi Kitahara, Noriaki Okazawa
  • Patent number: 6755515
    Abstract: An ink cartridge for an ink jet printer having a housing having at least one wall. The ink cartridge further has at least two ink chambers for containing different ink accommodated in the housing. Ink supply ports are formed in one wall of the housing within each of the ink chambers. Each of the ink supply ports has an inner opening and an outer opening. The distance from the inner opening of a first ink supply port to that of a second ink supply port adjacent to the first ink supply port is different from a second distance from the outer opening of the first ink supply opening to that of the second ink supply port.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: June 29, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Minoru Usui, Satoshi Shinada, Takahiro Naka, Hisashi Miyazawa, Takeo Seino, Hisashi Koike, Takao Kobayashi, Masahiro Kanai, Yasuko Hirano, Yasushi Akatsuka, Takayuki Iljima, Noriaki Okazawa, Hitoshi Matsumoto, Yasuhiro Ogura
  • Publication number: 20040121560
    Abstract: In order to provide a silicon wafer break pattern that stabilizes the location and shape of the breaks at weak spots of the break pattern and that reduces waste, the through-holes of the break pattern is disposed along a scribe line, a first group of the through-holes are substantially disposed on only a first side of the scribe line, and a second group of the through-holes are substantially disposed on only a second side of the scribe line.
    Type: Application
    Filed: December 11, 2003
    Publication date: June 24, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akihisa Wanibe, Noriaki Okazawa, Yoshinao Miyata, Toshinao Shinbo, Tetsuya Akasu, Hisashi Akachi
  • Publication number: 20040114005
    Abstract: A liquid ejecting head includes a flow passage formation section and a sealing section. The flow passage formation section includes a plurality of nozzle openings, ejecting liquid therefrom, a plurality of pressure generation parts, corresponding to the nozzle openings respectively, a plurality of liquid supply passages, communicating with the pressure generation parts respectively for supplying liquid thereto, and a plurality of partition wall parts, each separating one liquid supply passage and its corresponding pressure generation part from another liquid supply passage and its corresponding pressure generation part. The sealing section seals the flow passage formation section. The partition wall parts respectively include liquid supply passage partition wall parts which separate adjacent liquid supply passages. The sealing section has a thick part and a thin part.
    Type: Application
    Filed: September 30, 2003
    Publication date: June 17, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Noriaki Okazawa, Satoru Hosono, Munehide Kanaya, Akihisa Wanibe
  • Patent number: 6749296
    Abstract: Grooves 21 are formed in the side of an ink supply needle 17 opposite a filter 19 in order to induce the movement of ink using capillary attraction, and so that the grooves 21 ensure that ink can flow along a path to a recording head regardless of whether an air bubble is present.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: June 15, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Minoru Usui, Noriaki Okazawa, Satoru Hosono, Tomoaki Takahashi
  • Patent number: 6736491
    Abstract: A fixing plate includes a first region and a second region. A vibrator assembly includes a plurality of piezoelectric vibrators, a drive electrode formed on each of the piezoelectric vibrators, and a common electrode formed commonly to the piezoelectric vibrators. The vibrator assembly is bonded onto the first region in a cantilevered manner. A sheet-shaped wiring board supplies a drive signal to the drive electrode and applies a bias potential which is higher than a ground potential to the common electrode. A controller IC controls the drive signal. The controller IC has a first face mounted on the wiring board, and a second face opposing to the first face in which a semiconductor surface is exposed. An insulating layer is interposed between the second region of the fixing plate and the second face of the controller IC.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: May 18, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Noriaki Okazawa, Takashi Osuga
  • Patent number: 6729002
    Abstract: A pressurizing chamber 1 is formed as a recess by half etching of a silicon single-crystal substrate 2. A nozzle communicating hole 6 through which the pressurizing chamber 1 is connected to a nozzle opening 5 is formed as a through hole which is smaller in width than the pressurizing chamber 1. The pressurizing chamber 1 is connected to the nozzle opening 5 in the other face via the nozzle communicating hole 6 while reducing the volume of the pressurizing chamber 1 to a degree as small as possible. The silicon single-crystal substrate is used as a member constituting a spacer so that an ink drop of a reduced ink amount suitable for high density printing flies with high positioning accuracy.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: May 4, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Shinji Yasukawa, Minoru Usui, Takahiro Naka, Tsuyoshi Kitahara, Noriaki Okazawa, Hideaki Sonehara
  • Patent number: 6699552
    Abstract: In order to provide a silicon wafer break pattern that stabilizes the location and shape of the breaks at weak spots of the break pattern and that reduces waste, the through-holes of the break pattern is disposed along a scribe line, a first group of the through-holes are substantially disposed on only a first side of the scribe line, and a second group of the through-holes are substantially disposed on only a second side of the scribe line.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: March 2, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Akihisa Wanibe, Noriaki Okazawa, Yoshinao Miyata, Toshinao Shinbo, Tetsuya Akasu, Hisashi Akachi