Patents by Inventor Mikiya Umeyama

Mikiya Umeyama 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).

  • Patent number: 8342647
    Abstract: An inkjet printing apparatus is provided which can print images with no print quality variations. For this purpose, the fluid viscosity resistances between the print head and the print medium beneath respective nozzle arrays that occur as the print head moves in the forward direction are made equal to those that occur as the print head moves in the backward direction.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Yamane, Yukuo Yamaguchi, Mikiya Umeyama, Kiyomitsu Kudo, Chiaki Muraoka, Ken Tsuchii, Shuichi Ide
  • Patent number: 8342648
    Abstract: To provide an inkjet head which includes high-density nozzle rows and which does not easily cause an ejection failure due to adhesion of ink mist around ejection orifices when a high-density image of a secondary color is printed with a small number of paths. An inkjet head includes at least two or more types of nozzle rows that eject different amounts of ink. When A is the cross section, with respect to an ink supplying direction, of an ink supply path from each ejection orifice to a supply port and L is the length of the ink supply path, the value of A/L differs between the two or more types of nozzle rows. The nozzle row of which the value of A/L is small is disposed outside an area between the nozzle rows that eject a largest amount of ink and that are arranged next to each other.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Muraoka, Yasushi Iijima, Tomotsugu Kuroda, Naoko Tsujiuchi, Mikiya Umeyama, Masaki Oikawa, Yuichiro Akama, Keiji Tomizawa
  • Patent number: 8231203
    Abstract: While the print head is reduced in size, the adverse effect of air flows produced by ink droplets as they are ejected from a small number of ejection opening arrays is minimized. A small number of first ejection opening arrays eject one of three primary colors—cyan, magenta and yellow—and a large number of second and third ejection opening arrays eject the remaining two primary colors. A fourth ejection opening array is disposed between the first ejection opening array and the second or third ejection opening array.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: July 31, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Akama, Keiji Tomizawa, Toru Yamane, Masaki Oikawa, Genji Inada, Mikiya Umeyama, Chiaki Muraoka, Tomotsugu Kuroda
  • Patent number: 8210655
    Abstract: The present invention provides a liquid ejection head for which the peeling of an orifice plate from a substrate seldom occurs, even in a structure such that the walls that define each energy application chamber are narrowed toward an ejection port. The walls that define a first pressure chamber are inclined inward within the first pressure chamber, so that the first pressure chamber is narrowed, toward an ejection port, along a direction perpendicular to the heater formation face on which heaters are arranged. Further, the walls that define each ink flow path are inclined in the ink ejection direction. Furthermore, the angle at which the walls that define the ink flow path are inclined relative to the ink ejection direction is smaller than the angle at which the walls that define the first pressure chamber are inclined inward, within the first pressure chamber.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: July 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Muraoka, Yukuo Yamaguchi, Mikiya Umeyama, Toru Yamane, Masaki Oikawa, Yuichiro Akama, Keiji Tomizawa, Tomotsugu Kuroda
  • Patent number: 8152267
    Abstract: An ink jet recording apparatus configured to perform recording by discharging ink from a plurality of discharge ports disposed on a recording head. The apparatus includes a cap adapted to cover the plurality of discharge ports disposed on the recording head, a recessed portion defined on a bottom face inside the cap, a suction hole facilitating introducing a negative pressure to the recessed portion, an atmosphere communication hole located outside a range of the recessed portion and communicating with atmosphere, an ink absorber mounted inside the cap to cover the recessed portion, and a suction pump connected to the suction hole and configured to generate a negative pressure. When the plurality of discharge ports is covered with the cap, a projection image obtained when the plurality of discharge ports is projected onto the bottom face exists within the range of the recessed portion.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: April 10, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukuo Yamaguchi, Yutaka Koizumi, Mikiya Umeyama
  • Patent number: 8100505
    Abstract: A liquid ejecting head includes a substrate, a nozzle forming member for forming on a principal surface of the substrate a nozzle comprising a flow passage of liquid and an orifice for ejecting the liquid, and a dummy pattern. The dummy pattern has substantially the same dimension as at least a part of the nozzle and is formed so that a cross-section of the dummy pattern is exposed at an end surface of the nozzle forming member.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: January 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomotsugu Kuroda, Toru Yamane, Mikiya Umeyama, Masaki Oikawa, Yuichiro Akama, Chiaki Muraoka, Keiji Tomizawa
  • Patent number: 8087759
    Abstract: The impact accuracy of ejected droplets, the quality of printed images, and print speed can be improved in a print head having an ink channel for which the width thereof in a direction orthogonal to an ink supply direction in which ink is supplied from an ink supply port to a pressure chamber is smaller than that of a pressure chamber. In the print head, the center of a heater along the ink supply direction is offset from the center of the pressure chamber along the ink supply direction, toward the side of the pressure chamber far from the ink supply port in the ink supply direction.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: January 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Oikawa, Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Yuichiro Akama, Chiaki Muraoka, Tomotsugu Kuroda, Shingo Nagata, Satoshi Kudo
  • Patent number: 8052251
    Abstract: An ink jet recording head includes an element substrate; a plurality of ejection outlets, provided on the element substrate, for ejecting ink in a direction perpendicular to the element substrate; and a nozzle formation member having a plurality of ink flow paths which are in fluid communication with the ejection outlets, respectively. The ink flow paths are arranged at a density higher than 1200 dpi in an arranging direction of the ejection outlets and widths of flow passage walls forming the ink flow paths are smaller than heights of the ink flow paths and are smaller than widths of the ink flow paths.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: November 8, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyomitsu Kudo, Yukuo Yamaguchi, Genji Inada, Mikiya Umeyama, Masaru Iketani, Satoshi Kudo, Yuichiro Akama, Chiaki Muraoka, Satoshi Kimura
  • Patent number: 7963635
    Abstract: The landing precision of ink drops is improved to improve the image quality and increase the printing speed. An inkjet print head ejects ink supplied from an ink supply port from a plurality of ejection ports respectively connecting to ink paths having different flow resistances by using energy generated by a plurality of electrothermal transducer elements respectively corresponding to the plurality of the ejection ports, wherein each of the plurality of the ejection ports connected to the ink paths having a low ink flow resistance is arranged so that the center of each of the plurality of the ejection ports is positioned farther away from the ink supply port to the center of the corresponding electrothermal transducer element than each of the plurality of the ejection ports connected to the ink paths having a high ink flow resistance.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: June 21, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Oikawa, Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Chiaki Muraoka, Yuichiro Akama, Tomotsugu Kuroda
  • Patent number: 7938511
    Abstract: Provided are a printing head and an inkjet printing apparatus, which eject liquid droplets without leaving behind any bubble in each nozzle, thus having an enhanced durability. An ejection port of the printing head includes a first ejection port part communicating with the atmosphere and a second ejection port part having a cross-section orthogonal to an ejection direction being larger than a cross-section of the first ejection port part orthogonal to the ejection direction, and being formed between the energy effect chamber and the first ejection port part. In addition, the second ejection port part is formed to be eccentric to an electrothermal transducing element in an ink supply direction in which ink is supplied from an ink supplying port to the bubbling chamber.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: May 10, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Chiaki Muraoka, Yuichiro Akama, Masaki Oikawa, Tomotsugu Kuroda
  • Publication number: 20110074884
    Abstract: To provide an inkjet head which includes high-density nozzle rows and which does not easily cause an ejection failure due to adhesion of ink mist around ejection orifices when a high-density image of a secondary color is printed with a small number of paths. An inkjet head includes at least two or more types of nozzle rows that eject different amounts of ink. When A is the cross section, with respect to an ink supplying direction, of an ink supply path from each ejection orifice to a supply port and L is the length of the ink supply path, the value of A/L differs between the two or more types of nozzle rows. The nozzle row of which the value of A/L is small is disposed outside an area between the nozzle rows that eject a largest amount of ink and that are arranged next to each other.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 31, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chiaki Muraoka, Yasushi Iijima, Tomotsugu Kuroda, Naoko Tsujiuchi, Mikiya Umeyama, Masaki Oikawa, Yuichiro Akama, Keiji Tomizawa
  • Publication number: 20100315466
    Abstract: An inkjet printing apparatus is provided which can print images with no print quality variations. For this purpose, the fluid viscosity resistances between the print head and the print medium beneath respective nozzle arrays that occur as the print head moves in the forward direction are made equal to those that occur as the print head moves in the backward direction.
    Type: Application
    Filed: May 26, 2010
    Publication date: December 16, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Toru Yamane, Yukuo Yamaguchi, Mikiya Umeyama, Kiyomitsu Kudo, Chiaki Muraoka, Ken Tsuchii, Shuichi Ide
  • Patent number: 7784908
    Abstract: In a flexible wiring board for use in, for example, a liquid discharge head, wires disposed on a substrate in parallel are covered with a film material. The flexible wiring board is bendable towards one of a front surface side and a back surface side of the substrate and includes a bending line. The bending line is formed by bending the flexible wiring board along a bending direction crossing a longitudinal direction of the wires. The bending line contains the wires. Both ends of the flexible wiring board in the bending direction are located on the bending line. A distance between one of the wires located closest to one end of the flexible wiring board and the one end is larger on the bending line than in another part of the flexible wiring board. Accordingly, even if the flexible wiring board is bent at a small bend radius, peeling does not easily occur between a base film and a cover film.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: August 31, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mikiya Umeyama, Yutaka Koizumi, Yukuo Yamaguchi, Akira Goto, Masaru Iketani, Yuichiro Akama
  • Publication number: 20100046012
    Abstract: A liquid discharge head that is detachably attached to a recording apparatus includes a liquid discharge substrate, a planar region including a plurality of connection terminals that electrically connect the liquid discharge head to the recording apparatus by sliding relative to the recording apparatus while turning when mounted on the recording apparatus, and definition portions defining a rotational center. The planar region is disposed parallel to the rotational center. Among the plurality of connection terminals, the connection terminal disposed closer to the rotational center is longer in a direction perpendicular to the rotational center and parallel to the planar region than the connection terminal disposed more distant from the rotational center.
    Type: Application
    Filed: August 25, 2009
    Publication date: February 25, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kiyomitsu Kudo, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Kimura
  • Publication number: 20100045719
    Abstract: While the print head is reduced in size, the adverse effect of air flows produced by ink droplets as they are ejected from a small number of ejection opening arrays is minimized. A small number of first ejection opening arrays eject one of three primary colors—cyan, magenta and yellow—, and a large number of second and third ejection opening arrays eject the remaining two primary colors. A fourth ejection opening array, disposed between the first ejection opening array and second or third ejection opening array.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 25, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuichiro Akama, Keiji Tomizawa, Toru Yamane, Masaki Oikawa, Genji Inada, Mikiya Umeyama, Chiaki Muraoka, Tomotsugu Kuroda
  • Publication number: 20090315945
    Abstract: A present invention improves the impact accuracy of ejected droplets, the quality of printed images, and print speed. A print head according to the present invention has an ink channel for which the width thereof in a direction orthogonal to an ink supply direction in which ink is supplied from an ink supply port to a pressure chamber is smaller than that of a pressure chamber. In the print head, the center of a heater along the ink supply direction is offset from the center of the pressure chamber along the ink supply direction, toward the side of the pressure chamber far from the ink supply port in the ink supply direction.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masaki Oikawa, Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Yuichiro Akama, Chiaki Muraoka, Tomotsugu Kuroda, Shingo Nagata, Satoshi Kudo
  • Publication number: 20090201343
    Abstract: The present invention provides a liquid ejection head for which the peeling of an orifice plate from a substrate seldom occurs, even in a structure such that the walls that define each energy application chamber are narrowed toward a ejection port. The walls that define a first pressure chamber are inclined inward within the first pressure chamber, so that the first pressure chamber is narrowed, toward an ejection port, along a direction perpendicular to the heater formation face on which heaters are arranged. Further, the walls that define each ink flow path are inclined in the ink ejection direction. Furthermore, the angle at which the walls that define the ink flow path are inclined relative to the ink ejection direction is smaller than the angle at which the walls that define the first pressure chamber are inclined inward, within the first pressure chamber.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 13, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chiaki Muraoka, Yukuo Yamaguchi, Mikiya Umeyama, Toru Yamane, Masaki Oikawa, Yuichiro Akama, Keiji Tomizawa, Tomotsugu Kuroda
  • Publication number: 20090147056
    Abstract: The landing precision of ink drops is improved to improve the image quality and increase the printing speed. An inkjet print head ejects ink supplied from an ink supply port from a plurality of ejection ports respectively connecting to ink paths having different flow resistances by using energy generated by a plurality of electrothermal transducer elements respectively corresponding to the plurality of the ejection ports, wherein each of the plurality of the ejection ports connected to the ink paths having a low ink flow resistance is arranged so that the center of each of the plurality of the ejection ports is positioned farther away from the ink supply port to the center of the corresponding electrothermal transducer element than each of the plurality of the ejection ports connected to the ink paths having a high ink flow resistance.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 11, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masaki Oikawa, Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Chiaki Muraoka, Yuichiro Akama, Tomotsugu Kuroda
  • Publication number: 20090147050
    Abstract: A liquid ejecting head includes a substrate, a nozzle forming member for forming on a principal surface of the substrate a nozzle comprising a flow passage of liquid and an orifice for ejecting the liquid, and a dummy pattern. The dummy pattern has substantially the same dimension as at least a part of the nozzle and is formed so that a cross section of the dummy pattern is exposed at an end surface of the nozzle forming member.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 11, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomotsugu Kuroda, Toru Yamane, Mikiya Umeyama, Masaki Oikawa, Yuichiro Akama, Chiaki Muraoka, Keiji Tomizawa
  • Publication number: 20090058949
    Abstract: Provided are a printing head and an inkjet printing apparatus, which eject liquid droplets without leaving behind any bubble in each nozzle, thus having an enhanced durability. An ejection port of the printing head includes a first ejection port part communicating with the atmosphere and a second ejection port part having a cross-section orthogonal to an ejection direction being larger than a cross-section of the first ejection port part orthogonal to the ejection direction, and being formed between the energy effect chamber and the first ejection port part. In addition, the second ejection port part is formed to be eccentric to an electrothermal transducing element in an ink supply direction in which ink is supplied from an ink supplying port to the bubbling chamber.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 5, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiji Tomizawa, Mikiya Umeyama, Toru Yamane, Chiaki Muraoka, Yuichiro Akama, Masaki Oikawa, Tomotsugu Kuroda