Patents by Inventor Tsuyoshi Saeki

Tsuyoshi Saeki 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).

  • Publication number: 20210178777
    Abstract: An inkjet printing apparatus includes a tank in which ink is contained; a print head for ejecting ink supplied from the tank to perform print operation; 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; and a pump provided in the supply flow path or the collection flow path. The pump is driven, during print operation, at a first speed to circulate ink within a circulation path including the tank, the supply flow path, the print head, and the collection flow path, and the pump is driven, from a start of the ink circulation until a lapse of predetermined time period, at a second speed which is faster than the first speed.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Inventors: Junya Kosuge, Yumi Mukoyama, Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe
  • 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: 11007786
    Abstract: An inkjet printing apparatus performs: a first operation for pulling out ink in a flow path of the ejection opening up to the collection flow path into the first tank by operating the tank vacuum pump with the supply valve being closed and a second operation for pulling out ink in a flow path of the first tank up to the ejection opening by operating the cap vacuum pump with the collection valve being closed and the atmosphere release valve being opened.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: May 18, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe, Yumi Mukoyama, Ryoma Arai
  • Patent number: 10960678
    Abstract: An inkjet printing apparatus includes a tank in which ink is contained; a print head for ejecting ink supplied from the tank to perform print operation; 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; and a pump provided in the supply flow path or the collection flow path. The pump is driven, during print operation, at a first speed to circulate ink within a circulation path including the tank, the supply flow path, the print head, and the collection flow path, and the pump is driven, from a start of the ink circulation until a lapse of predetermined time period, at a second speed which is faster than the first speed.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: March 30, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junya Kosuge, Yumi Mukoyama, Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe
  • Publication number: 20210072675
    Abstract: There is provided with a printing apparatus. A printing unit prints an image on a print medium. A heating unit heats the print medium with the image printed thereon. A detection unit detects a temperature of the heating unit. A housing accommodates the printing unit and the heating unit. An openable/closable cover member is provided on the housing and covers the heating unit. A restricting unit is capable of restricting an opening operation of the cover member. A control unit controls the restricting unit so as to execute the restriction if the temperature of the heating unit exceeds a first threshold value, and release the restriction if the temperature of the heating unit is not more than a second threshold value lower than the first threshold value.
    Type: Application
    Filed: September 3, 2020
    Publication date: March 11, 2021
    Inventor: Tsuyoshi Saeki
  • Patent number: 10843481
    Abstract: A liquid ejection apparatus capable of detecting ink leakage early is provided. For this purpose, an ink leakage detection pin and a wall capable of storing leaked ink are provided at a joint part which is the part connecting the print head and the ink supply unit.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: November 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Shimoyama, Atsushi Kohnotoh, Ryoma Arai, Tsuyoshi Saeki
  • Patent number: 10843480
    Abstract: An inkjet printing apparatus includes: a print head provided with an ejection opening surface; a tank; a supply flow path; a collection flow path; an intra-tank vacuum pump to reduce pressure inside the tank; and a control unit. The control unit performs a first operation and a second operation, the first operation causing the intra-tank vacuum pump to operate while a collection drive valve is closed, so as to pull out ink in a flow path which extends from the ejection opening to the supply flow path into the tank, the second operation causing the intra-tank vacuum pump to operate while a supply drive valve is closed, so as to pull out ink in a flow path which extends from the ejection opening to the collection flow path into the tank.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: November 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryoma Arai, Tsuyoshi Saeki, Toshiaki Tokisawa, Junya Kosuge
  • Patent number: 10836180
    Abstract: A printing apparatus includes: a printing unit configured to eject ink supplied from a storage unit to perform a printing operation; a detection unit configured to detect ink stored in the storage unit; and an acquisition unit configured to acquire a consumption amount of ink consumed in the printing operation from the storage unit. The printing apparatus includes: a calculation unit configured to calculate a decrease amount that is a difference between the ink amount in the storage unit detected by the detection unit prior to the printing operation and the ink amount in the storage unit detected by the detection unit after the printing operation; and a determination unit configured to determine an ink leakage in a case where a difference between the decrease amount calculated by the calculation unit and the consumption amount acquired by the acquisition unit is larger than a threshold value.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: November 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Takahashi, Yoshinori Nakagawa, Takatoshi Nakano, Takuya Fukasawa, Tsuyoshi Saeki, Toshiaki Tokisawa
  • Patent number: 10780703
    Abstract: A channel control apparatus includes: a diaphragm portion displaceable between an opening position to open a channel and a closing position to close the channel; an abutment portion for moving in a first direction and a second direction opposite to the first direction by a driving source; and a gripping member that has an inclined surface portion for abutting against the abutment portion and grips the diaphragm portion, wherein when the abutment portion moves in the first direction, the gripping member displaces the diaphragm portion to the opening position by the abutment portion abutting against the inclined surface portion, and wherein when the abutment portion moves in the second direction, the gripping member displaces the diaphragm portion to the closing position by the abutment portion being separated from the inclined surface portion.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: September 22, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Abe, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, 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
  • Publication number: 20200207111
    Abstract: An inkjet printing apparatus includes a tank in which ink is contained; a print head for ejecting ink supplied from the tank to perform print operation; 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; and a pump provided in the supply flow path or the collection flow path. The pump is driven, during print operation, at a first speed to circulate ink within a circulation path including the tank, the supply flow path, the print head, and the collection flow path, and the pump is driven, from a start of the ink circulation until a lapse of predetermined time period, at a second speed which is faster than the first speed.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 2, 2020
    Inventors: Junya Kosuge, Yumi Mukoyama, Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe
  • Publication number: 20200180320
    Abstract: Provided is an inkjet printing apparatus comprising: a print head that ejects ink; a tank that contains ink to be supplied to the print head; a floating body that floats on the liquid surface of the ink inside the tank; and an electrode pin that detects the level of the liquid surface inside the tank. The floating body includes an opening portion in which to insert the electrode pin, and a perimeter of the opening portion protrudes from a top surface side of the floating body.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Inventors: Takashi Abe, Tsuyoshi Saeki
  • 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
  • Patent number: 10654283
    Abstract: A printing apparatus includes: a print head configured to eject ink; an ink tank configured to contain the ink; an ink flow path plate having a supply flow path for guiding ink to be supplied from the ink tank to the print head, and a collection flow path for guiding ink to be collected from the print head to the ink tank and provided below the ink tank in a gravitational direction; an atmosphere communication plate provided above the ink tank in the gravitational direction and having an atmosphere communication flow path for communicating the ink tank with atmosphere; a first functional component provided above the ink flow path plate in the gravitational direction to act on at least one of the supply flow path and the collection flow path; and a second functional component provided below the atmosphere communication plate in the gravitational direction to act on the atmosphere communication flow path.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: May 19, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Saeki, Toshiaki Tokisawa, Takashi Abe, Yumi Mukoyama
  • Patent number: 10632758
    Abstract: An inkjet printing apparatus includes a tank in which ink is contained; a print head for ejecting ink supplied from the tank to perform print operation; 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; and a pump provided in the supply flow path or the collection flow path. The pump is driven, during print operation, at a first speed to circulate ink within a circulation path including the tank, the supply flow path, the print head, and the collection flow path, and the pump is driven, from a start of the ink circulation until a lapse of predetermined time period, at a second speed which is faster than the first speed.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: April 28, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junya Kosuge, Yumi Mukoyama, Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe
  • Publication number: 20200108617
    Abstract: An inkjet printing apparatus performs: a first operation for pulling out ink in a flow path of the ejection opening up to the collection flow path into the first tank by operating the tank vacuum pump with the supply valve being closed and a second operation for pulling out ink in a flow path of the first tank up to the ejection opening by operating the cap vacuum pump with the collection valve being closed and the atmosphere release valve being opened.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 9, 2020
    Inventors: Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe, Yumi Mukoyama, Ryoma Arai
  • Publication number: 20200108624
    Abstract: A printing apparatus includes: a printing unit configured to eject ink supplied from a storage unit to perform a printing operation; a detection unit configured to detect ink stored in the storage unit; and an acquisition unit configured to acquire a consumption amount of ink consumed in the printing operation from the storage unit. The printing apparatus includes: a calculation unit configured to calculate a decrease amount that is a difference between the ink amount in the storage unit detected by the detection unit prior to the printing operation and the ink amount in the storage unit detected by the detection unit after the printing operation; and a determination unit configured to determine an ink leakage in a case where a difference between the decrease amount calculated by the calculation unit and the consumption amount acquired by the acquisition unit is larger than a threshold value.
    Type: Application
    Filed: September 18, 2019
    Publication date: April 9, 2020
    Inventors: Atsushi Takahashi, Yoshinori Nakagawa, Takatoshi Nakano, Takuya Fukasawa, Tsuyoshi Saeki, Toshiaki Tokisawa
  • Publication number: 20200101746
    Abstract: An ink supply unit supplying ink from an ink tank to a recording head, includes: a component including a pump by which ink is supplied and having an abutment portion constituted by a laser light absorbing material; a plate having a first surface capable of abutting against the abutment portion, a second surface opposite to the first surface, and a channel forming unit that surrounds an opening passing through the plate from the first surface to the second surface and projects from the second surface; a sealing member that seals the opening; and an ink channel from a first abutment place of a side of the second surface where the abutment portion abuts against the first surface around the opening, and from a second abutment place of the side of the second surface where the sealing member abuts against the channel forming unit.
    Type: Application
    Filed: September 13, 2019
    Publication date: April 2, 2020
    Inventors: Yumi Mukoyama, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, Takashi Abe
  • Publication number: 20200101744
    Abstract: A channel control apparatus includes: a diaphragm portion displaceable between an opening position to open a channel and a closing position to close the channel; an abutment portion for moving in a first direction and a second direction opposite to the first direction by a driving source; and a gripping member that has an inclined surface portion for abutting against the abutment portion and grips the diaphragm portion, wherein when the abutment portion moves in the first direction, the gripping member displaces the diaphragm portion to the opening position by the abutment portion abutting against the inclined surface portion, and wherein when the abutment portion moves in the second direction, the gripping member displaces the diaphragm portion to the closing position by the abutment portion being separated from the inclined surface portion.
    Type: Application
    Filed: September 16, 2019
    Publication date: April 2, 2020
    Inventors: Takashi Abe, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, Yumi Mukoyama
  • Patent number: 10596820
    Abstract: Provided is an inkjet printing apparatus comprising: a print head that ejects ink; a tank that contains ink to be supplied to the print head; a floating body that floats on the liquid surface of the ink inside the tank; and an electrode pin that detects the level of the liquid surface inside the tank. The floating body includes an opening portion in which to insert the electrode pin, and a perimeter of the opening portion protrudes from a top surface side of the floating body.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: March 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Abe, Tsuyoshi Saeki