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).
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Patent number: 12179489Abstract: 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 firType: GrantFiled: December 27, 2022Date of Patent: December 31, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Kentaro Murakami, Katsuhiro Okubo, Takahiro Kanegae, Haruhisa Uezawa, Hiroki Kobayashi
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Patent number: 11981136Abstract: 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: GrantFiled: March 23, 2022Date of Patent: May 14, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Takahiro Kanegae, Katsuhiro Okubo, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
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Patent number: 11938728Abstract: 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: GrantFiled: March 23, 2022Date of Patent: March 26, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Takahiro Kanegae, Katsuhiro Okubo, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
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Patent number: 11938732Abstract: 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: GrantFiled: March 23, 2022Date of Patent: March 26, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Katsuhiro Okubo, Takahiro Kanegae, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
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Patent number: 11780243Abstract: 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: GrantFiled: May 17, 2022Date of Patent: October 10, 2023Assignee: Seiko Epson CorporationInventors: Haruhisa Uezawa, Hiroki Kobayashi, Katsuhiro Okubo, Kentaro Murakami, Takahiro Kanegae, Shingo Tomimatsu
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Publication number: 20230202185Abstract: 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 firType: ApplicationFiled: December 27, 2022Publication date: June 29, 2023Inventors: Kentaro MURAKAMI, Katsuhiro OKUBO, Takahiro KANEGAE, Haruhisa UEZAWA, Hiroki KOBAYASHI
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Publication number: 20220371338Abstract: 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: ApplicationFiled: May 17, 2022Publication date: November 24, 2022Inventors: Haruhisa UEZAWA, Hiroki KOBAYASHI, Katsuhiro OKUBO, Kentaro MURAKAMI, Takahiro KANEGAE, Shingo TOMIMATSU
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Publication number: 20220305787Abstract: 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: ApplicationFiled: March 23, 2022Publication date: September 29, 2022Inventors: Katsuhiro Okubo, Takahiro Kanegae, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
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Publication number: 20220305785Abstract: 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: ApplicationFiled: March 23, 2022Publication date: September 29, 2022Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Kentaro MURAKAMI, Shingo TOMIMATSU, Hiroki KOBAYASHI, Haruhisa UEZAWA
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Publication number: 20220305788Abstract: 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: ApplicationFiled: March 23, 2022Publication date: September 29, 2022Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Kentaro MURAKAMI, Shingo TOMIMATSU, Hiroki KOBAYASHI, Haruhisa UEZAWA
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Patent number: 10967641Abstract: 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: GrantFiled: January 13, 2020Date of Patent: April 6, 2021Assignee: Seiko Epson CorporationInventors: Manabu Munakata, Haruhisa Uezawa
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Publication number: 20200223228Abstract: 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: ApplicationFiled: January 13, 2020Publication date: July 16, 2020Inventors: Manabu MUNAKATA, Haruhisa Uezawa
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Patent number: 9862202Abstract: 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: GrantFiled: March 21, 2017Date of Patent: January 9, 2018Assignee: Seiko Epson CorporationInventor: Haruhisa Uezawa
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Publication number: 20170274670Abstract: 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: ApplicationFiled: March 21, 2017Publication date: September 28, 2017Applicant: SEIKO EPSON CORPORATIONInventor: Haruhisa UEZAWA
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Patent number: 9290004Abstract: 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: GrantFiled: October 31, 2014Date of Patent: March 22, 2016Assignee: Seiko Epson CorporationInventors: Hiroshige Owaki, Katsuhiro Okubo, Haruhisa Uezawa
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Patent number: 9174437Abstract: 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: GrantFiled: February 27, 2014Date of Patent: November 3, 2015Assignee: Seiko Epson CorporationInventors: Hiroyuki Hagiwara, Haruhisa Uezawa
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Patent number: 9162472Abstract: 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: GrantFiled: November 14, 2013Date of Patent: October 20, 2015Assignee: Seiko Epson CorporationInventors: Kaoru Koike, Toshio Kumagai, Masaaki Ando, Haruhisa Uezawa
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Patent number: 9056467Abstract: 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: GrantFiled: October 12, 2011Date of Patent: June 16, 2015Assignee: Seiko Epson CorporationInventors: Akio Yamamori, Haruhisa Uezawa
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Patent number: 9044957Abstract: 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: GrantFiled: October 8, 2013Date of Patent: June 2, 2015Assignee: Seiko Epson CorporationInventors: Hiroshige Owaki, Hiroyuki Hagiwara, Haruhisa Uezawa
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Publication number: 20150049148Abstract: 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: ApplicationFiled: October 31, 2014Publication date: February 19, 2015Inventors: Hiroshige OWAKI, Katsuhiro OKUBO, Haruhisa UEZAWA