Patents by Inventor Kyoshiro Okude

Kyoshiro Okude 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: 11034159
    Abstract: An inkjet recording apparatus that the throughput until a start of a recording operation in the structure in which an ink is circulated between a recording head and an ink tank includes the recording head which discharges the ink to perform a recording operation, the ink tank which stores the ink, and a buffer chamber having a volume which is changed according to a pressure. When the inkjet recording apparatus is changed from a circulation state in which a supply pump and a collection pump are driven to circulate the ink between the recording head and the ink tank to a pause state in which the driving of the supply pump and the collection pump is stopped to stop the circulation of the ink, a negative pressure due to a change in the volume of the buffer chamber is maintained.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: June 15, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Saeki, Toshiaki Tokisawa, Kyoshiro Okude
  • Patent number: 10994551
    Abstract: An object of the present invention is to prevent a sub tank the does not need replenishment from being replenished with ink. The present invention is a printing apparatus that includes: a print head; a sub tank; a main tank; a supply valve; an atmosphere release valve; and one pump, and performs a replenishment operation to replenish the sub tank with ink from the main tank by driving the pump in a state where the atmosphere release valve is closed and the supply valve is open, wherein a second ink, and a third ink, and in a case where replenishment of a first ink and the third ink is necessary and replenishment of the second ink is not necessary, the atmosphere release valve is opened after the supply valve of the first ink is closed and before the supply valve of the second ink is opened.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: May 4, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Tokisawa, Kyoshiro Okude, Yumi Mukoyama, Ryoma Arai
  • Publication number: 20200346468
    Abstract: According to an aspect of the present invention, an inkjet printing apparatus includes a print head having an ejection opening surface on which ejection openings for ejecting ink are formed, a tank storing ink to be supplied to the print head, a supply flow path for supplying the ink from the tank to the print head, a collection flow path for collecting the ink from the print head to the tank, a supply pump provided in the supply flow path to supply the ink from the tank to the print head, a tank decompression pump which decompresses the inside of the tank, and a control unit which controls to drive the supply pump and the tank decompression pump to fill the collection flow path with ink.
    Type: Application
    Filed: July 22, 2020
    Publication date: November 5, 2020
    Inventors: Toshiaki Tokisawa, Yumi Mukoyama, Kyoshiro Okude, Takashi Abe, Takahiro Kiuchi
  • Patent number: 10766265
    Abstract: An object of the present invention is to provide an ink jet printing apparatus whose compactness is improved. The ink jet printing apparatus includes: a print head; an ink tank for each ink color; an ink flow path plate for each ink color having a supply flow path that guides the ink supplied from the ink tank to the print head and a recovery flow path that guides the ink recovered from the print head to the ink tank; a flow path concentration plate in which the supply flow path and the recovery flow path for each ink color are concentrated and which guides the ink between the ink flow path plate and the print head; and one or a plurality of function parts provided within a range of a space demarcated by the ink flow path plate and the flow path concentration plate.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: September 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Tokisawa, Junya Kosuge, Kyoshiro Okude, Yumi Mukoyama
  • Patent number: 10766271
    Abstract: In a color inkjet printing apparatus using an ink circulation system, there is provided an inkjet printing apparatus capable of making appropriate circulation control for individual inks without resulting in cost increase. To achieve this, an inkjet printing apparatus includes a plurality of diaphragm pumps for circulating ink within a print head, a sub-tank, a supply flow path, and a collection flow path. The plurality of diaphragm pumps are configured by mounting control members of different types which can press against diaphragm units of a same type.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: September 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
  • Patent number: 10759181
    Abstract: According to an aspect of the present invention, an inkjet printing apparatus includes a print head having an ejection opening surface on which ejection openings for ejecting ink are formed, a tank storing ink to be supplied to the print head, a supply flow path for supplying the ink from the tank to the print head, a collection flow path for collecting the ink from the print head to the tank, a supply pump provided in the supply flow path to supply the ink from the tank to the print head, a tank decompression pump which decompresses the inside of the tank, and a control unit which controls to drive the supply pump and the tank decompression pump to fill the collection flow path with ink.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: September 1, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Tokisawa, Yumi Mukoyama, Kyoshiro Okude, Takashi Abe, Takahiro Kiuchi
  • Publication number: 20200164658
    Abstract: An inkjet recording apparatus that the throughput until a start of a recording operation in the structure in which an ink is circulated between a recording head and an ink tank includes the recording head which discharges the ink to perform a recording operation, the ink tank which stores the ink, and a buffer chamber having a volume which is changed according to a pressure. When the inkjet recording apparatus is changed from a circulation state in which a supply pump and a collection pump are driven to circulate the ink between the recording head and the ink tank to a pause state in which the driving of the supply pump and the collection pump is stopped to stop the circulation of the ink, a negative pressure due to a change in the volume of the buffer chamber is maintained.
    Type: Application
    Filed: January 31, 2020
    Publication date: May 28, 2020
    Inventors: Tsuyoshi Saeki, Toshiaki Tokisawa, Kyoshiro Okude
  • Publication number: 20200164657
    Abstract: An inkjet recording apparatus includes a recording head, an ink tank, a supply flow path, a supply pump located in the supply flow path, a collection flow path, a relief flow path connecting a first position in the supply flow path to a second position in the supply flow path, wherein the first position is located at a downstream side of the supply pump in the supply flow path and the second position located at an upstream side of the supply pump in the supply flow path, and a differential pressure regulating valve located in the relief flow path and configured to, in a case where the pressure of the pumped ink in the supply flow path is larger than a predetermined value, open the relief flow path so as to allow ink in the supply flow path to flow from the first position to the second position.
    Type: Application
    Filed: January 29, 2020
    Publication date: May 28, 2020
    Inventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
  • Patent number: 10589534
    Abstract: An inkjet recording apparatus includes a recording head, an ink tank, a supply flow path, a supply pump located in the supply flow path, a collection flow path, a relief flow path connecting a first position in the supply flow path to a second position in the supply flow path, wherein the first position is located at a downstream side of the supply pump in the supply flow path and the second position located at an upstream side of the supply pump in the supply flow path, and a differential pressure regulating valve located in the relief flow path and configured to, in a case where the pressure of the pumped ink in the supply flow path is larger than a predetermined value, open the relief flow path so as to allow ink in the supply flow path to flow from the first position to the second position.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: March 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
  • Patent number: 10589535
    Abstract: An inkjet recording apparatus that the throughput until a start of a recording operation in the structure in which an ink is circulated between a recording head and an ink tank includes the recording head which discharges the ink to perform a recording operation, the ink tank which stores the ink, and a buffer chamber having a volume which is changed according to a pressure. When the inkjet recording apparatus is changed from a circulation state in which a supply pump and a collection pump are driven to circulate the ink between the recording head and the ink tank to a pause state in which the driving of the supply pump and the collection pump is stopped to stop the circulation of the ink, a negative pressure due to a change in the volume of the buffer chamber is maintained.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Saeki, Toshiaki Tokisawa, Kyoshiro Okude
  • Patent number: 10538096
    Abstract: According to an aspect, an inkjet printing apparatus includes a supply pump provided in a supply flow path for supplying ink from a tank to a print head, a first flow path connecting the first position upstream of the supply pump in the supply flow path and the second position downstream of the supply pump in the supply flow path, a second flow path connecting the tank and the third position downstream of the supply pump in the supply flow path, and an open/close valve provided in the second flow path and capable of opening and closing the second flow path.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: January 21, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Abe, Toshiaki Tokisawa, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
  • Publication number: 20190299631
    Abstract: An object of the present invention is to provide an ink jet printing apparatus whose compactness is improved. The ink jet printing apparatus includes: a print head; an ink tank for each ink color; an ink flow path plate for each ink color having a supply flow path that guides the ink supplied from the ink tank to the print head and a recovery flow path that guides the ink recovered from the print head to the ink tank; a flow path concentration plate in which the supply flow path and the recovery flow path for each ink color are concentrated and which guides the ink between the ink flow path plate and the print head; and one or a plurality of function parts provided within a range of a space demarcated by the ink flow path plate and the flow path concentration plate.
    Type: Application
    Filed: March 5, 2019
    Publication date: October 3, 2019
    Inventors: Toshiaki Tokisawa, Junya Kosuge, Kyoshiro Okude, Yumi Mukoyama
  • Publication number: 20190299648
    Abstract: An object of the present invention is to prevent a sub tank the does not need replenishment from being replenished with ink. The present invention is a printing apparatus that includes: a print head; a sub tank; a main tank; a supply valve; an atmosphere release valve; and one pump, and performs a replenishment operation to replenish the sub tank with ink from the main tank by driving the pump in a state where the atmosphere release valve is closed and the supply valve is open, wherein a second ink, and a third ink, and in a case where replenishment of a first ink and the third ink is necessary and replenishment of the second ink is not necessary, the atmosphere release valve is opened after the supply valve of the first ink is closed and before the supply valve of the second ink is opened.
    Type: Application
    Filed: February 28, 2019
    Publication date: October 3, 2019
    Inventors: Toshiaki Tokisawa, Kyoshiro Okude, Yumi Mukoyama, Ryoma Arai
  • Patent number: 10427412
    Abstract: An object is to provide a liquid ejecting apparatus that enables a liquid storage container to be properly and easily refilled with a liquid from a liquid refilling container without causing color mixture in the liquid storage container. The liquid ejecting apparatus includes liquid storage containers each configured to feed the liquid to a liquid ejecting portion and liquid refilling containers each configured to refill the liquid storage container with the liquid. A first fitting unit is provided around a liquid injection port in each of the liquid storage containers. A second fitting unit is provided around a liquid pour-out port in each of the liquid refilling containers. The second fitting unit is fitted to the first fitting unit to enable the liquid to be delivered from the liquid pour-out port to the liquid injection port.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: October 1, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyoshiro Okude, Masateru Komori, Masato Koshimizu, Tsuyoshi Saeki, Yukimichi Kimura, Masahiro Kawanishi, Masaaki Matsuura, Katsuyuki Yokoi, Akira Shiba, Ryo Shimamura, Kazuya Yoshii, Norihiro Ikebe, Takeho Miyashita, Tomoki Yamamuro, Atsushi Arai, Masatoshi Ohira, Tatsuaki Orihara, Hirofumi Okuhara, Kazumasa Matsushita, Misato Furuya
  • Publication number: 20190283443
    Abstract: In a color inkjet printing apparatus using an ink circulation system, there is provided an inkjet printing apparatus capable of making appropriate circulation control for individual inks without resulting in cost increase. To achieve this, an inkjet printing apparatus includes a plurality of diaphragm pumps for circulating ink within a print head, a sub-tank, a supply flow path, and a collection flow path. The plurality of diaphragm pumps are configured by mounting control members of different types which can press against diaphragm units of a same type.
    Type: Application
    Filed: June 5, 2019
    Publication date: September 19, 2019
    Inventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
  • Patent number: 10357977
    Abstract: In a color inkjet printing apparatus using an ink circulation system, there is provided an inkjet printing apparatus capable of making appropriate circulation control for individual inks without resulting in cost increase. To achieve this, an inkjet printing apparatus includes a plurality of diaphragm pumps for circulating ink within a print head, a sub-tank, a supply flow path, and a collection flow path. The plurality of diaphragm pumps are configured by mounting control members of different types which can press against diaphragm units of a same type.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: July 23, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
  • Patent number: 10336085
    Abstract: An inkjet printing apparatus includes a tank, a print head including a pressure chamber filled with ink supplied from the tank and an ejection opening which is communicated with the pressure chamber and which ejects ink filled in the pressure chamber a supply flow path for supplying ink from the tank to the print head, a collection flow path for collecting ink from the print head to the tank, a circulation unit configured to circulate ink so as to flow through the supply flow path, an inside of the pressure chamber, and the collection flow path, and a buffer chamber disposed inside the print head or in the collection flow path and which is volume variable. The tank is disposed higher than the print head in a vertical direction, and a one-way valve is provided between the buffer chamber and the tank in the collection flow path.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: July 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryoma Arai, Junya Kosuge, Takashi Abe, Yumi Mukoyama, Kyoshiro Okude
  • Patent number: 10214032
    Abstract: Provided is a printing apparatus enabling a user to easily perform jam processing. The printing apparatus includes a printing unit, a cassette in which a plurality of sheets to be printed by the printing unit are mounted, and which is capable of being drawn out from the device by a user, a roller pair which is capable of being in an abutting state and a separate state and transports the sheet supplied from the cassette by interposing the sheet, in the abutting state, and a mechanism which changes the roller pair from the abutting state to the separate state as the cassette is drawn out.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: February 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Matsuura, Katsuyuki Yokoi, Masateru Komori, Masato Koshimizu, Tsuyoshi Saeki, Kyoshiro Okude, Yukimichi Kimura, Masahiro Kawanishi
  • Publication number: 20190009557
    Abstract: An inkjet printing apparatus includes a tank, a print head including a pressure chamber filled with ink supplied from the tank and an ejection opening which is communicated with the pressure chamber and which ejects ink filled in the pressure chamber a supply flow path for supplying ink from the tank to the print head, a collection flow path for collecting ink from the print head to the tank, a circulation unit configured to circulate ink so as to flow through the supply flow path, an inside of the pressure chamber, and the collection flow path, and a buffer chamber disposed inside the print head or in the collection flow path and which is volume variable. The tank is disposed higher than the print head in a vertical direction, and a one-way valve is provided between the buffer chamber and the tank in the collection flow path.
    Type: Application
    Filed: June 11, 2018
    Publication date: January 10, 2019
    Inventors: Ryoma Arai, Junya Kosuge, Takashi Abe, Yumi Mukoyama, Kyoshiro Okude
  • Publication number: 20190009561
    Abstract: In a color inkjet printing apparatus using an ink circulation system, there is provided an inkjet printing apparatus capable of making appropriate circulation control for individual inks without resulting in cost increase. To achieve this, an inkjet printing apparatus includes a plurality of diaphragm pumps for circulating ink within a print head, a sub-tank, a supply flow path, and a collection flow path. The plurality of diaphragm pumps are configured by mounting control members of different types which can press against diaphragm units of a same type.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 10, 2019
    Inventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai