Patents by Inventor Yoshiyuki Nakagawa

Yoshiyuki Nakagawa 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: 9764550
    Abstract: A liquid ejection head substrate includes a heating resistor array including a plurality of heating resistors and a protective film covering at least one of the heating resistors. The liquid ejection head substrate further includes a supply opening array and an electrode. The supply opening array is disposed on a side of a surface of the liquid ejection head substrate on which the protective film is provided. The supply opening array includes a plurality of supply openings through which a liquid is supplied arranged in a direction along the heating resistor array. The electrode is disposed on the side of the surface in a space between the supply openings adjacent to each other in a direction along the supply opening array. The electrode is configured such that a voltage is applied between the electrode and the protective film.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 19, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Ishida, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Takatsugu Moriya, Tatsuya Yamada, Shuzo Iwanaga
  • Publication number: 20170239946
    Abstract: Provided is an inkjet print head capable of favorably cleaning an ejection port surface and also of improving landing accuracy of ejected ink onto a print medium. For that purpose, a conductive layer formed of a conductive material is formed on a support substrate, flattening processing is executed, and a liquid ejection substrate is mounted on the support substrate with good positional accuracy without protrusion of a sealant for protecting an electric connection portion of the liquid ejection substrate from the ejection port surface.
    Type: Application
    Filed: February 10, 2017
    Publication date: August 24, 2017
    Inventor: Yoshiyuki Nakagawa
  • Patent number: 9731504
    Abstract: A liquid ejection head having at least one energy generation element for generating heat to be used for ejecting a liquid includes an insulating layer which is provided in contact with a substrate and supports the energy generation element; at least one heat transmitting layer which is composed of a material having a higher thermal conductivity than that of a material of the insulating layer and which is provided, in the insulating layer, between the energy generation element and the substrate; and a heat transmitting member which thermally connects the at least one heat transmitting layer and the substrate, wherein the heat transmitting member is connected to an area, on the heat transmitting layer, excluding an area directly below the energy generation element in a position interposed between the energy generation element and the substrate.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: August 15, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Sekine, Yoshiyuki Nakagawa, Masataka Sakurai
  • Publication number: 20170197412
    Abstract: Multiple recording elements are disposed on one face of a recording element board, and a groove-shaped liquid supply channel is provided on the other face in common for the recording elements. Multiple supply ports passing through the recording element board and communicating the liquid supply channel with pressure chambers, and supply-side openings serving as supply ports of liquid to the liquid supply channel are further provided. When discharging liquid, the sum of pressure drop of the liquid from any supply-side opening to the supply port at a position farthest removed from that supply-side opening, and the pressure drop of the liquid at the supply port, is 5000 Pa or less.
    Type: Application
    Filed: December 29, 2016
    Publication date: July 13, 2017
    Inventors: Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada, Shuzo Iwanaga, Ayako Tozuka, Tomoki Ishiwata, Tomohiro Sato
  • Publication number: 20170197411
    Abstract: A recording element board includes a discharge orifice configured to discharge liquid, a pressure chamber communicating with the discharge orifice, a recording element configured to generate thermal energy to cause bubbling of the liquid, the recording element being disposed in the pressure chamber facing the discharge orifice, and a substrate on which the recording element is formed. When the recording element is driven and the liquid of within the pressure chamber is discharged, a generated bubble communicates with the atmosphere. A discharge orifice projection region where the discharge orifice has been projected on the substrate includes a region includes a region extending beyond a heat-generating region projection region where the heat-generating region of the recording element has been projected on the substrate, the outline of the discharge orifice projection region is circumscribed by the outline of the heat-generating region projection region.
    Type: Application
    Filed: January 3, 2017
    Publication date: July 13, 2017
    Inventors: Takatsugu Moriya, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Koichi Ishida, Tatsuya Yamada, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga
  • Publication number: 20170197410
    Abstract: 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: Application
    Filed: December 30, 2016
    Publication date: July 13, 2017
    Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Akiko Saito, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada
  • Publication number: 20170197419
    Abstract: A liquid ejection head including: an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside, wherein an expression of H?0.34×P?0.66×W>1.7 is satisfied when a height of the passage is set to H, a length of the ejection opening portion is set to P, and a length of the ejection opening portion is set to W.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Shingo Okushima, Seiichiro Karita, Takatsuna Aoki, Noriyasu Nagai, Eisuke Nishitani, Yoshiyuki Nakagawa
  • Publication number: 20170197430
    Abstract: A liquid is reliably supplied to a liquid ejection head through a plurality of supply paths. The liquid is supplied to a plurality of areas of the liquid ejection head through the plurality of supply paths and a liquid ejection amount per unit time from the liquid ejection head is controlled so that a liquid flow amount of each of the areas becomes a predetermined flow amount or less.
    Type: Application
    Filed: December 27, 2016
    Publication date: July 13, 2017
    Inventors: Ayako Tozuka, Shuzo Iwanaga, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Tomohiro Sato, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada, Tomoki Ishiwata
  • Publication number: 20170197407
    Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.
    Type: Application
    Filed: December 16, 2016
    Publication date: July 13, 2017
    Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Yoshiyuki Nakagawa, Akira Yamamoto
  • Publication number: 20170197413
    Abstract: 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: Application
    Filed: December 29, 2016
    Publication date: July 13, 2017
    Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Saito, Koichi Ishida, Takatsugu Moriya
  • Publication number: 20170197433
    Abstract: A liquid discharge apparatus has a liquid discharge head having a recording element board that includes a plurality of discharge orifices configured to discharge liquid, a plurality of pressure chambers internally provided with a recording element configured to generate energy used to discharge liquid, the plurality of pressure chambers each communicating with the plurality of discharge orifices via discharge channels, a liquid supply channel configured to supply liquid to the plurality of pressure chambers, and a liquid recovery channel configured to recover liquid from the plurality of pressure chambers, and a tank configured to store liquid supplied to the liquid discharge head. The plurality of pressure chambers communicate between the liquid supply channel and the liquid recovery channel so that liquid flows through the plurality of pressure chambers, and the specific permittivity ?r of the liquid stored in the tank satisfies the relationship of ?r?65.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Yoshiyuki Nakagawa, Shuzo Iwanaga, Shingo Okushima, Mikio Sanada, Shin-ichi Hakamada
  • Publication number: 20170197416
    Abstract: A liquid ejection module and a liquid ejection head capable of suppressing unevenness in printing are provided. Accordingly, openings are disposed so that a center position of at least one of openings in a plurality of ejection opening rows is not disposed on the same line extending in a print medium movement direction in a relative movement with respect to center positions of the other openings.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Takatsugu Moriya, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Koichi Ishida, Tatsuya Yamada, Shuzo Iwanaga, Ayako Tozuka, Tomoki Ishiwata, Tomohiro Sato
  • Patent number: 9581379
    Abstract: A floor-standing air-conditioning apparatus includes a lower air inlet, an air outlet having an air outlet opening, a heat exchanger that is provided in the body, a crossflow fan that is provided in the body and produces a flow of air in which the air that has flowed into the body passes through the heat exchanger and is guided to the air outlet, a drain pan that is provided below the heat exchanger in the height direction of the body. The heat exchanger includes a front heat exchanger and a rear heat exchanger, a pair of which form a V shape with their lower ends being in contact with, or in proximity to, each other, and are arranged so that the crossflow fan is positioned between the front heat exchanger and the rear heat exchanger.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: February 28, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Ikeda, Koji Yamaguchi, Tetsuo Yamashita, Tetsuya Tazawa, Yoshiyuki Nakagawa
  • Publication number: 20160375685
    Abstract: A liquid ejection head substrate includes a heating resistor array including a plurality of heating resistors and a protective film covering at least one of the heating resistors. The liquid ejection head substrate further includes a supply opening array and an electrode. The supply opening array is disposed on a side of a surface of the liquid ejection head substrate on which the protective film is provided. The supply opening array includes a plurality of supply openings through which a liquid is supplied arranged in a direction along the heating resistor array. The electrode is disposed on the side of the surface in a space between the supply openings adjacent to each other in a direction along the supply opening array. The electrode is configured such that a voltage is applied between the electrode and the protective film.
    Type: Application
    Filed: June 21, 2016
    Publication date: December 29, 2016
    Inventors: Koichi Ishida, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Takatsugu Moriya, Tatsuya Yamada, Shuzo Iwanaga
  • Publication number: 20160297199
    Abstract: The liquid ejection head having at least one energy generation element for generating heat to be used for ejecting a liquid includes: an insulating layer which is provided in contact with a substrate and supports the energy generation element; at least one heat transmitting layer which is composed of a material having a higher thermal conductivity than that of a material of the insulating layer and which is provided, in the insulating layer, between the energy generation element and the substrate; and a heat transmitting member which thermally connects the at least one heat transmitting layer and the substrate, wherein the heat transmitting member is connected to an area, on the heat transmitting layer, excluding an area directly below the energy generation element in a position interposed between the energy generation element and the substrate.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 13, 2016
    Inventors: Takayuki Sekine, Yoshiyuki Nakagawa, Masataka Sakurai
  • Patent number: 9382624
    Abstract: A film formation method controls with accuracy the thickness of a thin film formed on a film formation object. The film formation method includes a film formation step of heating a film formation source and forming a film on a film formation object while moving the film formation source and monitoring an amount of released vapors of the film forming material using a quartz oscillator for measurement, a control step of adjusting a heating temperature of the film formation source based on the monitored value of the quartz oscillator for measurement, and a calibration step of calibrating the monitored value of the quartz oscillator for measurement, using a quartz oscillator for calibration and the quartz oscillator for measurement. The calibration step is performed in a middle of the film formation step, after movement of the film formation source is started from a waiting position.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: July 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Shingo Nakano, Naoto Fukuda
  • Patent number: 9096063
    Abstract: A method of manufacturing a liquid ejection head includes the steps of (1) forming a recess in a second surface of a substrate to form a common supply port, (2) forming an etching mask, which specifies opening positions of independent supply ports, on a bottom surface of the common supply port, and (3) performing ion etching using plasma with the etching mask employed as a mask, thereby forming the independent supply ports. The etching mask has an opening pattern formed therein such that respective distances from an ejection energy generation element to openings of two independent supply ports adjacent to the ejection energy generation element on the first surface side of the substrate are equal to each other.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: August 4, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Kubota, Ken Tsuchii, Masataka Sakurai, Yoshiyuki Nakagawa, Akiko Saito, Shinji Kishikawa, Ryoji Kanri, Atsunori Terasaki, Akihiko Okano, Atsushi Hiramoto
  • Publication number: 20150211782
    Abstract: A floor-standing air-conditioning apparatus includes a lower air inlet, an air outlet having an air outlet opening, a heat exchanger that is provided in the body, a crossflow fan that is provided in the body and produces a flow of air in which the air that has flowed into the body passes through the heat exchanger and is guided to the air outlet, a drain pan that is provided below the heat exchanger in the height direction of the body. The heat exchanger includes a front heat exchanger and a rear heat exchanger, a pair of which form a V shape with their lower ends being in contact with, or in proximity to, each other, and are arranged so that the crossflow fan is positioned between the front heat exchanger and the rear heat exchanger.
    Type: Application
    Filed: April 6, 2012
    Publication date: July 30, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takashi Ikeda, Koji Yamaguchi, Tetsuo Yamashita, Tetsuya Tazawa, Yoshiyuki Nakagawa
  • Patent number: 9085144
    Abstract: A liquid ejection head capable of more efficiently ejecting ink and an inkjet printing apparatus are provided. The liquid ejection head has a block member which surrounds at least a part of an effective bubble-generating region involved with heat generation in a heat-generating element and which is formed so as to protrude from the heat-generating element in a direction in which a liquid is ejected. The block member is arranged in a position where a distance of a position of an inner end part from an outer end part of the effective bubble-generating region is +2 ?m or less, with an outward direction being set to be positive.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: July 21, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Takatsuna Aoki, Kazuhiro Yamada, Yumi Komamiya, Ryo Kasai
  • Publication number: 20150176129
    Abstract: Provided are a film formation apparatus and a film formation method which may control with accuracy the thickness of a thin film formed on the film formation object. A film formation apparatus includes a moving part (film formation source unit) for moving a film formation source between a predetermined film formation waiting position and a predetermined film forming position is provided, and the moving part holds a quartz oscillator for measurement and a quartz oscillator for calibration so that their relative positions with respect to the film formation source are maintained. And a calibration step for calibrating a monitored value of the quartz oscillator for measurement, using a monitored value of the quartz oscillator for calibration, is performed in a middle of the film forming step of forming the film on the film formation object.
    Type: Application
    Filed: March 2, 2015
    Publication date: June 25, 2015
    Inventors: Yoshiyuki Nakagawa, Shingo Nakano, Naoto Fukuda