Patents by Inventor Akira Miyagishi
Akira Miyagishi 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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Publication number: 20240116291Abstract: There is provided a liquid discharge system that controls an operation of a liquid discharge head provided with a first nozzle for discharging a liquid, the liquid discharge system including: an acquisition section that acquires first information indicating a discharge state of the first nozzle; a reception section that receives second information on a determination reference for determining that the discharge state of the first nozzle is abnormal according to an operation of a user; and a determination section that determines presence or absence of a discharge abnormality of the first nozzle based on the first information and the second information.Type: ApplicationFiled: October 2, 2023Publication date: April 11, 2024Inventors: Toshiro MURAYAMA, Nobuaki ITO, Akira MIYAGISHI, Tomonaga HASEGAWA
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Publication number: 20240116294Abstract: There is provided a liquid discharge system that controls an operation of a first liquid discharge head provided with a plurality of nozzles for discharging a liquid, the liquid discharge system including: a determination section that determines presence or absence of a discharge abnormality of a first nozzle among the plurality of nozzles; a reception section that receives designation information indicating complementary processing designated by a user among a plurality of complementary processing for complementing the discharge abnormality of the first nozzle when the first nozzle has a discharge abnormality, that is, among the plurality of complementary processing different from each other, according to an operation of the user; and an execution section that executes the complementary processing indicated by the designation information received by the reception section when the determination section determines that the first nozzle has the discharge abnormality.Type: ApplicationFiled: October 2, 2023Publication date: April 11, 2024Inventors: Toshiro MURAYAMA, Nobuaki ITO, Akira MIYAGISHI, Tomonaga HASEGAWA
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Patent number: 11878523Abstract: A liquid ejecting head includes a flow passage, an energy producing element, and a nozzle. A direction in which a portion which is a part of the flow passage and with which the nozzle is in communication extends is defined as a first direction. A direction in which the liquid is ejected from the nozzle and which is orthogonal to the first direction is defined as a second direction. A direction which is orthogonal to both the first direction and the second direction is defined as a third direction. Given this definition, the nozzle includes a first portion and a second portion, the second portion being located closer to the flow passage along the second direction than the first portion is. The cross-sectional area size of the first portion when viewed in the second direction is smaller than the cross-sectional area size of the second portion when viewed in the second direction.Type: GrantFiled: April 7, 2022Date of Patent: January 23, 2024Assignee: Seiko Epson CorporationInventors: Akira Miyagishi, Toshiro Murayama
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Publication number: 20240010000Abstract: A liquid discharge head includes a first nozzle and a second nozzle, the first nozzle includes a first downstream nozzle portion opened on a discharge surface of a nozzle substrate and a first upstream nozzle portion of which a cross-sectional area is larger than a cross-sectional area of the first downstream nozzle portion, the second nozzle includes a second downstream nozzle portion opened on the discharge surface and a second upstream nozzle portion of which a cross-sectional area is larger than a cross-sectional area of the second downstream nozzle portion, and, when viewed in a thickness direction, a second distance between a gravity center position of the second downstream nozzle portion and a gravity center position of the second upstream nozzle portion is longer than a first distance between a gravity center position of the first downstream nozzle portion and a gravity center position of the first upstream nozzle portion.Type: ApplicationFiled: July 6, 2023Publication date: January 11, 2024Inventors: Shohei MIZUTA, Akira MIYAGISHI, Toshiro MURAYAMA, Madoka ITO
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Publication number: 20240009996Abstract: A liquid ejecting head includes a first driving element, a first pressure chamber, and a first nozzle that is formed in a nozzle substrate, in which the first nozzle includes a first upstream nozzle portion including a first supply opening opened in a second surface of the nozzle substrate and a first bottom surface and a first downstream nozzle portion including a first ejection opening opened in a first surface of the nozzle substrate and a first coupling section opened in the first bottom surface, when viewed in a thickness direction of the nozzle substrate, a sectional area of the first upstream nozzle portion is larger than a sectional area of the first downstream nozzle portion, and a center of gravity of the first coupling section is positioned between a center of gravity of the first ejection opening and a center of gravity of the first bottom surface.Type: ApplicationFiled: July 6, 2023Publication date: January 11, 2024Inventors: Shohei MIZUTA, Yuma FUKUZAWA, Akira MIYAGISHI, Toshiro MURAYAMA, Madoka ITO
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Patent number: 11827028Abstract: A liquid discharging apparatus has: a liquid discharging head that has a driving element and a pressure chamber in which liquid is pressurized when the driving element is driven; a driving circuit that drives the driving element; a detection circuit that detects a signal related to residual vibration in the pressure chamber; and a control section that controls a filling operation to supply liquid from the outside into the liquid discharging head. The control section terminates the filling operation according to a signal detected by the detection circuit after the driving element is driven by the driving circuit.Type: GrantFiled: June 21, 2021Date of Patent: November 28, 2023Assignee: Seiko Epson CorporationInventor: Akira Miyagishi
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Publication number: 20230241887Abstract: A liquid discharge apparatus includes: a plurality of dischargers including a nozzle, a pressure chamber, and a drive element to discharge liquid in the pressure chamber through the nozzle; and a driver that generates, for each of the plurality of dischargers, an individual drive signal to drive the drive element based on a plurality of drive signals including a first drive signal having a first contraction waveform in which an electrical potential changes to cause a volume of the pressure chamber to contract, and a second drive signal having a second contraction waveform in which an electrical potential changes to cause the volume of the pressure chamber to contract. In one cycle, a center of one of a time period of the first contraction waveform and a time period of the second contraction waveform is located in the other of the time periods.Type: ApplicationFiled: January 27, 2023Publication date: August 3, 2023Inventors: Yuki WATANABE, Akira MIYAGISHI, Madoka ITO, Akinori TANIUCHI
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Patent number: 11660866Abstract: The first nozzle channel includes a first portion including an end of the first nozzle channel and a second portion including another end of the first nozzle channel, and a width of the second portion in the second direction is larger than a width of the first portion in the second direction.Type: GrantFiled: June 3, 2022Date of Patent: May 30, 2023Assignee: Seiko Epson CorporationInventor: Akira Miyagishi
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Publication number: 20230136625Abstract: A liquid ejecting head includes a line of first pressure chambers, a line of second pressure chambers, a line of nozzles including nozzles arranged in a first direction, first piezoelectric bodies, first individual electrodes, a first common electrode, second piezoelectric bodies, second individual electrodes, a second common electrode, a wiring member, a first individual line that electrically couples the first individual electrode to the wiring member, a first common line that electrically couples the first common electrode to the wiring member, a second individual line that electrically couples the second individual electrode to the wiring member, and a second common line that electrically couples the second common electrode to the wiring member.Type: ApplicationFiled: October 31, 2022Publication date: May 4, 2023Inventor: Akira MIYAGISHI
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Publication number: 20230089063Abstract: A liquid ejection apparatus is configured to control a supply of a drive signal to a drive element by a controller so that a target period is either an ejection period or a non-ejection period based on print data. The drive signal includes an ejection pulse and a non-ejection pulse. The controller: does not supply the non-ejection pulse to the drive element when the target period is the non-ejection period and an elapsed time length from the last ejection period is less than the predetermined time length, and supplies the non-ejection pulse to the drive element when the target period is the non-ejection period and the elapsed time length is equal to or longer than the predetermined time length. The predetermined time length is an integral multiple or more of ½ of a natural vibration cycle of a meniscus of a liquid in the nozzle.Type: ApplicationFiled: September 21, 2022Publication date: March 23, 2023Inventors: Yuki WATANABE, Akira MIYAGISHI, Akinori TANIUCHI
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Patent number: 11548280Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.Type: GrantFiled: December 1, 2020Date of Patent: January 10, 2023Assignee: Seiko Epson CorporationInventors: Yuma Fukuzawa, Shotaro Tamai, Yoichi Naganuma, Akira Miyagishi, Kazuaki Uchida
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Patent number: 11491785Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.Type: GrantFiled: December 1, 2020Date of Patent: November 8, 2022Assignee: Seiko Epson CorporationInventors: Yuma Fukuzawa, Shotaro Tamai, Yoichi Naganuma, Akira Miyagishi, Kazuaki Uchida
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Publication number: 20220324229Abstract: A liquid ejecting head includes a flow passage, an energy producing element, and a nozzle. A direction in which a portion which is a part of the flow passage and with which the nozzle is in communication extends is defined as a first direction. A direction in which the liquid is ejected from the nozzle and which is orthogonal to the first direction is defined as a second direction. A direction which is orthogonal to both the first direction and the second direction is defined as a third direction. Given this definition, the nozzle includes a first portion and a second portion, the second portion being located closer to the flow passage along the second direction than the first portion is. The cross-sectional area size of the first portion when viewed in the second direction is smaller than the cross-sectional area size of the second portion when viewed in the second direction.Type: ApplicationFiled: April 7, 2022Publication date: October 13, 2022Inventors: Akira MIYAGISHI, Toshiro MURAYAMA
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Publication number: 20220288934Abstract: the first nozzle channel includes a first portion including an end of the first nozzle channel and a second portion including another end of the first nozzle channel, and a width of the second portion in the second direction is larger than a width of the first portion in the second direction.Type: ApplicationFiled: June 3, 2022Publication date: September 15, 2022Inventor: Akira MIYAGISHI
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Patent number: 11400711Abstract: the first nozzle channel includes a first portion including an end of the first nozzle channel and a second portion including another end of the first nozzle channel, and a width of the second portion in the second direction is larger than a width of the first portion in the second direction.Type: GrantFiled: February 4, 2021Date of Patent: August 2, 2022Assignee: Seiko Epson CorporationInventor: Akira Miyagishi
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Patent number: 11260661Abstract: A width of the first nozzle channel in the first direction is larger than a width of the first communication channel in the second direction and a width of the first nozzle channel in a third direction intersecting the first direction and the second direction is smaller than a width of the first communication channel in the third direction.Type: GrantFiled: February 11, 2021Date of Patent: March 1, 2022Assignee: Seiko Epson CorporationInventors: Yuki Watanabe, Akira Miyagishi, Akinori Taniuchi
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Patent number: 11225073Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.Type: GrantFiled: December 1, 2020Date of Patent: January 18, 2022Assignee: Seiko Epson CorporationInventors: Yuma Fukuzawa, Shotaro Tamai, Yoichi Naganuma, Akira Miyagishi, Kazuaki Uchida
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Patent number: 11225072Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.Type: GrantFiled: December 1, 2020Date of Patent: January 18, 2022Assignee: Seiko Epson CorporationInventors: Yuma Fukuzawa, Shotaro Tamai, Yoichi Naganuma, Akira Miyagishi, Kazuaki Uchida
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Patent number: 11207887Abstract: A liquid ejecting head includes a first flow path extending in a first axial direction between a supply port and a discharge port, and a nozzle that is provided to branch from the first flow path and that discharges a liquid along a second axial direction orthogonal to the first axial direction. The nozzle includes a first nozzle portion in which a first opening for discharging the liquid is formed and a second nozzle portion in which a second opening that is a coupling port with the first flow path is formed, and a diameter r2 of the second opening in the first axial direction is larger than a diameter r1 of the first opening in the first axial direction.Type: GrantFiled: July 1, 2020Date of Patent: December 28, 2021Assignee: Seiko Epson CorporationInventors: Akinori Taniuchi, Akira Miyagishi, Toshiro Murayama, Shotaro Tamai
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Publication number: 20210394522Abstract: A liquid discharging apparatus has: a liquid discharging head that has a driving element and a pressure chamber in which liquid is pressurized when the driving element is driven; a driving circuit that drives the driving element; a detection circuit that detects a signal related to residual vibration in the pressure chamber; and a control section that controls a filling operation to supply liquid from the outside into the liquid discharging head. The control section terminates the filling operation according to a signal detected by the detection circuit after the driving element is driven by the driving circuit.Type: ApplicationFiled: June 21, 2021Publication date: December 23, 2021Inventor: Akira MIYAGISHI