Patents by Inventor Haruhisa Uezawa

Haruhisa Uezawa 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: 12179489
    Abstract: A liquid ejecting head includes: a nozzle row configured by arranging nozzles ejecting a liquid in a first-direction in a second-direction orthogonal to the first-direction; a drive element; and stacked components defining a common liquid chamber communicating with the nozzle row, in which the stacked components include a filter partitioning the common liquid chamber into an upstream common liquid chamber and a downstream common liquid chamber, a first-case defining a first-common-liquid-chamber-portion as a part of the upstream common liquid chamber and stacked on the filter, and a second-case defining a second-common-liquid-chamber-portion as a part of the upstream common liquid chamber and stacked on the first-case, the second-common liquid-chamber-portion is positioned in a direction opposite to the first-direction from the drive element, and a width of the second-common-liquid-chamber-portion in a third-direction orthogonal to the first-direction and the second-direction is longer than a width of the fir
    Type: Grant
    Filed: December 27, 2022
    Date of Patent: December 31, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kentaro Murakami, Katsuhiro Okubo, Takahiro Kanegae, Haruhisa Uezawa, Hiroki Kobayashi
  • Patent number: 11981136
    Abstract: A liquid ejecting head includes: a plurality of head chips having a nozzle surface; a thermally conductive holder holding the plurality of head chips; a thermally conductive flow path structure provided with a flow path of a liquid supplied to the plurality of head chips; and a planar heater disposed between the holder and the flow path structure and along a direction parallel to the nozzle surface, in which the heater overlaps the plurality of head chips in a plan view.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: May 14, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takahiro Kanegae, Katsuhiro Okubo, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Patent number: 11938728
    Abstract: A liquid ejecting head includes: head chips including a first-head-chip and a second-head-chip; a holder holding the head chips; and a heater along a direction parallel to a nozzle surface. The first-head-chip and the second-head-chip are disposed to be offset from each other in both a first-direction and a second-direction parallel to the nozzle surface and intersecting with each other. When a first-side is one of the four sides of a virtual rectangle circumscribing the aggregate of the head chips and a second-side and a third-side are coupled to both ends of the first-side, the first-head-chip is in contact with the first-side and the third-side and the second-head chip is in contact with the second-side. The heater overlaps the head chips. A first-region surrounded by the first-side, the second-side, the first-head-chip, and the second-head-chip includes a first-outside-part positioned outside the outer edge of the heater.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: March 26, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takahiro Kanegae, Katsuhiro Okubo, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Patent number: 11938732
    Abstract: A liquid ejecting head supported by a support body includes: a first head chip; a holder having a holding portion holding the first head chip and a flange portion; and a heater heating the holding portion, in which the holding portion has a heat receiving portion receiving heat from the heater, and a shortest path of heat transferred through the holder from the heat receiving portion to the flange portion is bent or curved at two or more points.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: March 26, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Katsuhiro Okubo, Takahiro Kanegae, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Patent number: 11780243
    Abstract: A liquid ejecting head includes: a plurality of head chips having nozzles; a holder holding the plurality of head chips; and a planar heater disposed on the holder and heating the holder, in which the heater includes an outer peripheral region along an outer edge of the holder and a middle region positioned inside the outer peripheral region in a plan view, and a heat generation amount per unit time of the outer peripheral region is larger than a heat generation amount per unit time of the middle region.
    Type: Grant
    Filed: May 17, 2022
    Date of Patent: October 10, 2023
    Assignee: Seiko Epson Corporation
    Inventors: Haruhisa Uezawa, Hiroki Kobayashi, Katsuhiro Okubo, Kentaro Murakami, Takahiro Kanegae, Shingo Tomimatsu
  • Publication number: 20230202185
    Abstract: A liquid ejecting head includes: a nozzle row configured by arranging nozzles ejecting a liquid in a first-direction in a second-direction orthogonal to the first-direction; a drive element; and stacked components defining a common liquid chamber communicating with the nozzle row, in which the stacked components include a filter partitioning the common liquid chamber into an upstream common liquid chamber and a downstream common liquid chamber, a first-case defining a first-common-liquid-chamber-portion as a part of the upstream common liquid chamber and stacked on the filter, and a second-case defining a second-common-liquid-chamber-portion as a part of the upstream common liquid chamber and stacked on the first-case, the second-common liquid-chamber-portion is positioned in a direction opposite to the first-direction from the drive element, and a width of the second-common-liquid-chamber-portion in a third-direction orthogonal to the first-direction and the second-direction is longer than a width of the fir
    Type: Application
    Filed: December 27, 2022
    Publication date: June 29, 2023
    Inventors: Kentaro MURAKAMI, Katsuhiro OKUBO, Takahiro KANEGAE, Haruhisa UEZAWA, Hiroki KOBAYASHI
  • Publication number: 20220371338
    Abstract: A liquid ejecting head includes: a plurality of head chips having nozzles; a holder holding the plurality of head chips; and a planar heater disposed on the holder and heating the holder, in which the heater includes an outer peripheral region along an outer edge of the holder and a middle region positioned inside the outer peripheral region in a plan view, and a heat generation amount per unit time of the outer peripheral region is larger than a heat generation amount per unit time of the middle region.
    Type: Application
    Filed: May 17, 2022
    Publication date: November 24, 2022
    Inventors: Haruhisa UEZAWA, Hiroki KOBAYASHI, Katsuhiro OKUBO, Kentaro MURAKAMI, Takahiro KANEGAE, Shingo TOMIMATSU
  • Publication number: 20220305787
    Abstract: A liquid ejecting head supported by a support body includes: a first head chip; a holder having a holding portion holding the first head chip and a flange portion; and a heater heating the holding portion, in which the holding portion has a heat receiving portion receiving heat from the heater, and a shortest path of heat transferred through the holder from the heat receiving portion to the flange portion is bent or curved at two or more points.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: Katsuhiro Okubo, Takahiro Kanegae, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Publication number: 20220305785
    Abstract: A liquid ejecting head includes: head chips including a first-head-chip and a second-head-chip; a holder holding the head chips; and a heater along a direction parallel to a nozzle surface. The first-head-chip and the second-head-chip are disposed to be offset from each other in both a first-direction and a second-direction parallel to the nozzle surface and intersecting with each other. When a first-side is one of the four sides of a virtual rectangle circumscribing the aggregate of the head chips and a second-side and a third-side are coupled to both ends of the first-side, the first-head-chip is in contact with the first-side and the third-side and the second-head chip is in contact with the second-side. The heater overlaps the head chips. A first-region surrounded by the first-side, the second-side, the first-head-chip, and the second-head-chip includes a first-outside-part positioned outside the outer edge of the heater.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Kentaro MURAKAMI, Shingo TOMIMATSU, Hiroki KOBAYASHI, Haruhisa UEZAWA
  • Publication number: 20220305788
    Abstract: A liquid ejecting head includes: a plurality of head chips having a nozzle surface; a thermally conductive holder holding the plurality of head chips; a thermally conductive flow path structure provided with a flow path of a liquid supplied to the plurality of head chips; and a planar heater disposed between the holder and the flow path structure and along a direction parallel to the nozzle surface, in which the heater overlaps the plurality of head chips in a plan view.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Kentaro MURAKAMI, Shingo TOMIMATSU, Hiroki KOBAYASHI, Haruhisa UEZAWA
  • Patent number: 10967641
    Abstract: A liquid ejecting apparatus including a liquid ejecting head including a nozzle for ejecting liquid by driving a drive element, an electrical component coupled to the drive element, a liquid storing member including a filling port for injecting the liquid from a refilling container therethrough, the liquid storing member receiving and storing the liquid through the filling port, and a holder mounting the liquid ejecting head, the electrical component, and the liquid storing member. In the liquid ejecting apparatus, the electrical component and the filling port do not overlap each other in plan view.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: April 6, 2021
    Assignee: Seiko Epson Corporation
    Inventors: Manabu Munakata, Haruhisa Uezawa
  • Publication number: 20200223228
    Abstract: A liquid ejecting apparatus including a liquid ejecting head including a nozzle for ejecting liquid by driving a drive element, an electrical component coupled to the drive element, a liquid storing member including a filling port for injecting the liquid from a refilling container therethrough, the liquid storing member receiving and storing the liquid through the filling port, and a holder mounting the liquid ejecting head, the electrical component, and the liquid storing member. In the liquid ejecting apparatus, the electrical component and the filling port do not overlap each other in plan view.
    Type: Application
    Filed: January 13, 2020
    Publication date: July 16, 2020
    Inventors: Manabu MUNAKATA, Haruhisa Uezawa
  • Patent number: 9862202
    Abstract: A liquid introduction member includes an inlet into which a liquid is introduced, a filter to filter the liquid introduced from the inlet, a filter chamber in which cross-sectional areas of the flow path increase from the inlet side to the filter side, and a supply flow path to supply the liquid that has passed through the filter to the nozzle side. The filter chamber has at least one guide extending from an inner wall surface of the filter chamber toward the inlet with a space between the guide and the filter, a bottom surface of the guide has a guide surface to guide bubbles which have entered from the inlet, and the guide guides the bubbles into the space by use of the guide surface to spread the bubbles onto the filter toward an outer periphery of the filter.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: January 9, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Haruhisa Uezawa
  • Publication number: 20170274670
    Abstract: A liquid introduction member includes an inlet into which a liquid is introduced, a filter to filter the liquid introduced from the inlet, a filter chamber in which cross-sectional areas of the flow path increase from the inlet side to the filter side, and a supply flow path to supply the liquid that has passed through the filter to the nozzle side. The filter chamber has at least one guide extending from an inner wall surface of the filter chamber toward the inlet with a space between the guide and the filter, a bottom surface of the guide has a guide surface to guide bubbles which have entered from the inlet, and the guide guides the bubbles into the space by use of the guide surface to spread the bubbles onto the filter toward an outer periphery of the filter.
    Type: Application
    Filed: March 21, 2017
    Publication date: September 28, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Haruhisa UEZAWA
  • Patent number: 9290004
    Abstract: A liquid ejecting head includes a head body configured to eject liquid, a flow path member including a liquid flow path for supplying the liquid to the head body, and a circuit substrate held by the flow path member and including a temperature detection unit configured to detect a temperature. The flow path member includes a detection region, which has a thermal resistance lower than a thermal resistance of other regions and which is provided in a part of a partition wall that partitions the liquid flow path. The circuit substrate is fixed to the flow path member in a state in which the temperature detection unit faces the detection region.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: March 22, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshige Owaki, Katsuhiro Okubo, Haruhisa Uezawa
  • Patent number: 9174437
    Abstract: Provided is a liquid ejecting apparatus including a first temperature sensor for detecting ink temperature and a second temperature sensor for detecting ambient temperature of a liquid ejecting head, in which a controller for controlling discharge of the ink generates a driving signal including a discharge voltage which is used for, based on a temperature detected by the first temperature sensor, discharging ink droplets through nozzle openings and a fine-oscillation voltage which is used for finely oscillating meniscuses of the ink without discharging the ink droplets and corresponds to the discharge voltage. Furthermore, the controller sets a coefficient in accordance with a temperature difference between the ink temperature and the ambient temperature and controls an energy level of the fine oscillation by applying the fine-oscillation voltage, based on the coefficient.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: November 3, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Hagiwara, Haruhisa Uezawa
  • Patent number: 9162472
    Abstract: A filter unit includes: a space portion, through which a liquid passes, whose outer cross-sectional shape when cut along the direction orthogonal to the axial direction is circular or polygonal; a filter provided at the surface on one end side of the space portion in the axial direction thereof; a protruding member, provided at the surface on the other end side of the space portion in the axial direction thereof, that protrudes toward a center area of the surface on the one end side of the space portion; an inflow channel that allows the liquid to flow into the space portion from a direction tangential to the side circumferential surface of the space portion; and an outflow channel that allows the liquid to pass through the filter and flow out from the space portion.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: October 20, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Kaoru Koike, Toshio Kumagai, Masaaki Ando, Haruhisa Uezawa
  • Patent number: 9056467
    Abstract: A liquid ejecting head unit includes: a liquid ejecting head that ejects a liquid through nozzles by driving a pressure generation element to cause the pressure within a pressure chamber to fluctuate; a flow channel member in which is formed a flow channel that supplies the liquid to a head flow channel of the liquid ejecting head; a substrate, mounted to a side surface of the flow channel member, on which is mounted an electrical component for supplying power to the pressure generation element; and a temperature measurement device provided on the surface of the substrate that faces the flow channel member. Here, the flow channel member includes an opening that passes therethrough toward the flow channel; and the temperature of the liquid within the flow channel is measured by the temperature measurement device that is provided facing the opening.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: June 16, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Akio Yamamori, Haruhisa Uezawa
  • Patent number: 9044957
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head that ejects liquid in a manifold as liquid droplets from a nozzle opening; a supply path that supplies the liquid to the manifold; a pump unit that is disposed in the supply path and pumps the liquid; and a discharge path that discharges the liquid from the manifold, wherein a flow path resistance of the discharge path from the manifold is smaller than a flow path resistance of the supply path from the pump unit to the manifold.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: June 2, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshige Owaki, Hiroyuki Hagiwara, Haruhisa Uezawa
  • Publication number: 20150049148
    Abstract: A liquid ejecting head includes a head body configured to eject liquid, a flow path member including a liquid flow path for supplying the liquid to the head body, and a circuit substrate held by the flow path member and including a temperature detection unit configured to detect a temperature. The flow path member includes a detection region, which has a thermal resistance lower than a thermal resistance of other regions and which is provided in a part of a partition wall that partitions the liquid flow path. The circuit substrate is fixed to the flow path member in a state in which the temperature detection unit faces the detection region.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 19, 2015
    Inventors: Hiroshige OWAKI, Katsuhiro OKUBO, Haruhisa UEZAWA