Patents by Inventor Takatsugu Moriya
Takatsugu Moriya 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: 11970004Abstract: A liquid discharge head includes a liquid discharge substrate that has a discharge-orifice row, pressure generating elements, and pressure chambers. The liquid discharge head discharges a liquid in a block-by-block manner using sequential driving. The discharge-orifice row is disposed so as to incline at an angle ?=Arctan (d1/d2) relative to a direction extending orthogonal to the conveyance direction of the medium, in which d1 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the conveyance direction and d2 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the direction orthogonal to the conveyance direction. A partition wall is formed between adjacent pressure chambers so as to separate the adjacent pressure chambers from each other. The partition wall has a communicating portion that communicates the adjacent pressure chambers with each other.Type: GrantFiled: April 12, 2022Date of Patent: April 30, 2024Assignee: Canon Kabushiki KaishaInventors: Tomohiro Sato, Shuzo Iwanaga, Takatsugu Moriya, Koichi Ishida, Shingo Okushima, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura
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Publication number: 20240109303Abstract: In order to make it less likely for the accuracy of determination of the ejection state of a liquid ejection head to be low, a liquid ejection apparatus sets a determination threshold for determining an ejection state of the liquid ejection head using first energy, the determination threshold being set based on a first output value outputted from the output unit in an event where the heat generating resistance element is driven with the first energy in an ejection state in which the liquid is ejected from an ejection port and a second output value estimated to be outputted from the output unit assuming the heat generating resistance element is driven with the first energy in a non-ejection state in which the liquid is not ejected.Type: ApplicationFiled: August 30, 2023Publication date: April 4, 2024Inventors: TAKATSUGU MORIYA, NOBUYUKI HIRAYAMA, HIROYASU NOMURA, TAKESHI MURASE
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Publication number: 20230271425Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: ApplicationFiled: May 1, 2023Publication date: August 31, 2023Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Patent number: 11667132Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: GrantFiled: March 2, 2022Date of Patent: June 6, 2023Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Publication number: 20230008821Abstract: A recording apparatus includes: a liquid ejection head including a heating element, a first protection layer that blocks contact between the heating element and liquid, a second protection layer that covers at least a portion of the first protection layer to be heated by the heating element and that functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, an ejection port that ejects the liquid, and a temperature detection element that corresponds to the heating element, and a detection unit configured to detect a feature point in a temperature curve that indicates a relationship between time and temperature, in which a combination of a potential set for the first electrode and a potential set for the second electrode in a case where printing is performed varies from that in a case where the detection unit detects the feature point.Type: ApplicationFiled: July 6, 2022Publication date: January 12, 2023Inventors: Yoshihiro Hamada, Takahiro Matsui, Takatsugu Moriya, Nobuyuki Hirayama
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Patent number: 11541656Abstract: A recording apparatus includes a liquid ejection head, where the liquid ejection head includes: an ejection port, a first substrate, and a temperature detection element. The ejection port ejects liquid and includes a protrusion extending toward an ejection port inside. The first substrate includes a heating element that ejects liquid from the ejection port using heat. The temperature detection element detects temperature of the first substrate. Driving of the heating element is controlled based on whether a difference between a voltage value Vp1 measured by the temperature detection element and a preset voltage value Vp01 has a positive value within or outside a predetermined range or a negative value outside the predetermined range. The voltage value Vp1 is measured when a temperature change amount becomes maximum in a temperature falling process of a second substrate located, after the heating element is driven, at a position corresponding to the heating element.Type: GrantFiled: September 10, 2020Date of Patent: January 3, 2023Assignee: Canon Kabushiki KaishaInventors: Tomoki Ishiwata, Takatsugu Moriya, Nobuyuki Hirayama
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Publication number: 20220339934Abstract: A liquid discharge head includes a liquid discharge substrate that has a discharge-orifice row, pressure generating elements, and pressure chambers. The liquid discharge head discharges a liquid in a block-by-block manner using sequential driving. The discharge-orifice row is disposed so as to incline at an angle ?=Arctan (d1/d2) relative to a direction extending orthogonal to the conveyance direction of the medium, in which d1 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the conveyance direction and d2 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the direction orthogonal to the conveyance direction. A partition wall is formed between adjacent pressure chambers so as to separate the adjacent pressure chambers from each other. The partition wall has a communicating portion that communicates the adjacent pressure chambers with each other.Type: ApplicationFiled: April 12, 2022Publication date: October 27, 2022Inventors: Tomohiro Sato, Shuzo Iwanaga, Takatsugu Moriya, Koichi Ishida, Shingo Okushima, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura
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Publication number: 20220184968Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: ApplicationFiled: March 2, 2022Publication date: June 16, 2022Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Patent number: 11298954Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: GrantFiled: October 1, 2020Date of Patent: April 12, 2022Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Patent number: 11027543Abstract: A printing apparatus measures a temperature of an electrothermal transducer by a corresponding temperature detection element, detects, based on the measured temperature, a peak voltage which indicates a point of change, from a state where ink is discharged normally from a printhead to a state where the ink is not discharged from the printhead, and compares the peak voltage with a threshold value. The measurement, detection, and comparison are repeated until the peal voltage becomes equal to or more than the threshold value. Energy supplied to the electrothermal transducer at a time in which the peak voltage is determined to be equal to or more than the threshold is determined to be minimum discharge energy.Type: GrantFiled: December 3, 2019Date of Patent: June 8, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Takatsugu Moriya, Masaki Oikawa, Nobuyuki Hirayama, Hiroyasu Nomura
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Publication number: 20210086508Abstract: A recording apparatus includes a liquid ejection head, where the liquid ejection head includes: an ejection port, a first substrate, and a temperature detection element. The ejection port ejects liquid and includes a protrusion extending toward an ejection port inside. The first substrate includes a heating element that ejects liquid from the ejection port using heat. The temperature detection element detects temperature of the first substrate. Driving of the heating element is controlled based on whether a difference between a voltage value Vp1 measured by the temperature detection element and a preset voltage value Vp01 has a positive value within or outside a predetermined range or a negative value outside the predetermined range. The voltage value Vp1 is measured when a temperature change amount becomes maximum in a temperature falling process of a second substrate located, after the heating element is driven, at a position corresponding to the heating element.Type: ApplicationFiled: September 10, 2020Publication date: March 25, 2021Inventors: Tomoki Ishiwata, Takatsugu Moriya, Nobuyuki Hirayama
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Publication number: 20210016577Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: ApplicationFiled: October 1, 2020Publication date: January 21, 2021Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Patent number: 10828906Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.Type: GrantFiled: May 13, 2019Date of Patent: November 10, 2020Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
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Patent number: 10723127Abstract: A liquid ejection head including first and second recording element substrates adjacent in a direction intersecting a relative movement direction include ejection opening rows that include ejection openings arranged in the intersecting direction. A straight line connecting the ejection openings in end portions on a second recording element substrate side in the first recording element substrate and a straight line connecting the ejection openings in end portions on a first recording element substrate side in the second recording element substrate are inclined towards a middle area side of the first recording element substrate, and arrangement intervals of the ejection openings in an end portion area on the second recording element substrate side of a first ejection opening row is larger than arrangement intervals of the ejection openings in an end portion area on the first recording element substrate side of a second ejection opening row.Type: GrantFiled: April 1, 2019Date of Patent: July 28, 2020Assignee: Canon Kabushiki KaishaInventors: Koichi Ishida, Shuzo Iwanaga, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura, Takatsugu Moriya, Tomohiro Sato, Tatsuya Yamada, Tomoki Ishiwata, Ayako Iwasaki
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Publication number: 20200180308Abstract: A printing apparatus measures a temperature of an electrothermal transducer by a corresponding temperature detection element, detects, based on the measured temperature, a peak voltage which indicates a point of change, from a state where ink is discharged normally from a printhead to a state where the ink is not discharged from the printhead, and compares the peak voltage with a threshold value. The measurement, detection, and comparison are repeated until the peal voltage becomes equal to or more than the threshold value. Energy supplied to the electrothermal transducer at a time in which the peak voltage is determined to be equal to or more than the threshold is determined to be minimum discharge energy.Type: ApplicationFiled: December 3, 2019Publication date: June 11, 2020Inventors: Takatsugu Moriya, Masaki Oikawa, Nobuyuki Hirayama, Hiroyasu Nomura
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Patent number: 10603910Abstract: A liquid discharge head includes a recording element configured to generate thermal energy and a discharge orifice disposed at a position facing the recording element. A bubble is generated in liquid by the thermal energy, liquid between the bubble and the discharge orifice is discharged from the discharge orifice by the pressure of the generated bubble, and the bubble communicates with the atmosphere on the outside of the discharge orifice.Type: GrantFiled: December 17, 2018Date of Patent: March 31, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Yoshiyuki Nakagawa, Shintaro Kasai, Akiko Hammura, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada
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Patent number: 10556433Abstract: A liquid discharge apparatus includes a liquid discharge head including a discharge port configured to discharge liquid and a discharge port surface provided with the discharge port. A head cleaning member including a contact portion contacts the discharge port surface, and is configured to cause the contact portion to contact the discharge port surface and to move relative to the discharge port surface in order to clean adherents attached to the discharge port surface. The discharge port includes a plurality of protrusion portions extending toward a discharge port inner side. The contact portion includes a fiber, and the fiber in the contact portion includes a portion having a size greater than a minimum protrusion distance among protrusion distances between the protrusion portions.Type: GrantFiled: January 10, 2019Date of Patent: February 11, 2020Assignee: Canon Kabushiki KaishaInventors: Tomoki Ishiwata, Takatsugu Moriya, Shinya Asano, Kanto Kurasawa, Ryosuke Araki
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Patent number: 10507654Abstract: A print element substrate and a liquid ejection head capable of suppressing degradation of a print quality caused by a white stripe/black stripe etc., is actualized without using a high degree of microfabrication technology. As a result of asymmetric deformation by swelling in a direction of relative movement to a print medium, print elements having different liquid droplet ejection directions are made to coexist and arrayed for that purpose.Type: GrantFiled: May 23, 2017Date of Patent: December 17, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada, Shuzo Iwanaga, Tomohiro Sato, Tomoki Ishiwata
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Patent number: 10486421Abstract: A liquid discharging head includes a discharge port that discharges a liquid, a pressure chamber that communicates with the discharge port, and an energy generating element that is disposed in the pressure chamber. In the liquid discharging head, the discharge port is provided with a plurality of projections that project towards a central portion of the discharge port from an inner peripheral edge of the discharge port, and an interval between the projections at a location where the projections are closest to each other is 5 ?m or less.Type: GrantFiled: September 27, 2018Date of Patent: November 26, 2019Assignee: Canon Kabushiki KaishaInventors: Takatsugu Moriya, Shuzo Iwanaga, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura, Tatsuya Yamada, Tomohiro Sato, Ayako Iwasaki, Tomoki Ishiwata, Koichi Ishida
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Publication number: 20190308413Abstract: A liquid ejection head including first and second recording element substrates adjacent in a direction intersecting a relative movement direction include ejection opening rows that include ejection openings arranged in the intersecting direction. A straight line connecting the ejection openings in end portions on a second recording element substrate side in the first recording element substrate and a straight line connecting the ejection openings in end portions on a first recording element substrate side in the second recording element substrate are inclined towards a middle area side of the first recording element substrate, and arrangement intervals of the ejection openings in an end portion area on the second recording element substrate side of a first ejection opening row is larger than arrangement intervals of the ejection openings in an end portion area on the first recording element substrate side of a second ejection opening row.Type: ApplicationFiled: April 1, 2019Publication date: October 10, 2019Inventors: Koichi Ishida, Shuzo Iwanaga, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura, Takatsugu Moriya, Tomohiro Sato, Tatsuya Yamada, Tomoki Ishiwata, Ayako Iwasaki