Patents by Inventor Ryoma Arai
Ryoma Arai 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: 11845290Abstract: 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: GrantFiled: September 30, 2021Date of Patent: December 19, 2023Assignee: Canon Kabushiki KaishaInventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
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Publication number: 20220016899Abstract: 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: ApplicationFiled: September 30, 2021Publication date: January 20, 2022Inventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
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Patent number: 11167559Abstract: 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: GrantFiled: January 29, 2020Date of Patent: November 9, 2021Assignee: Canon Kabushiki KaishaInventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
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Patent number: 11007786Abstract: 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: GrantFiled: September 26, 2019Date of Patent: May 18, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe, Yumi Mukoyama, Ryoma Arai
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Patent number: 10994551Abstract: 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: GrantFiled: February 28, 2019Date of Patent: May 4, 2021Assignee: Canon Kabushiki KaishaInventors: Toshiaki Tokisawa, Kyoshiro Okude, Yumi Mukoyama, Ryoma Arai
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Patent number: 10843480Abstract: 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: GrantFiled: February 8, 2019Date of Patent: November 24, 2020Assignee: Canon Kabushiki KaishaInventors: Ryoma Arai, Tsuyoshi Saeki, Toshiaki Tokisawa, Junya Kosuge
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Patent number: 10843481Abstract: 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: GrantFiled: March 22, 2019Date of Patent: November 24, 2020Assignee: Canon Kabushiki KaishaInventors: Noboru Shimoyama, Atsushi Kohnotoh, Ryoma Arai, Tsuyoshi Saeki
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Patent number: 10780703Abstract: 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: GrantFiled: September 16, 2019Date of Patent: September 22, 2020Assignee: Canon Kabushiki KaishaInventors: Takashi Abe, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, Yumi Mukoyama
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Patent number: 10766271Abstract: 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: GrantFiled: June 5, 2019Date of Patent: September 8, 2020Assignee: Canon Kabushiki KaishaInventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
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Publication number: 20200164657Abstract: 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: ApplicationFiled: January 29, 2020Publication date: May 28, 2020Inventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
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Publication number: 20200108617Abstract: 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: ApplicationFiled: September 26, 2019Publication date: April 9, 2020Inventors: Toshiaki Tokisawa, Tsuyoshi Saeki, Takashi Abe, Yumi Mukoyama, Ryoma Arai
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Publication number: 20200101744Abstract: 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: ApplicationFiled: September 16, 2019Publication date: April 2, 2020Inventors: Takashi Abe, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, Yumi Mukoyama
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Publication number: 20200101746Abstract: 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: ApplicationFiled: September 13, 2019Publication date: April 2, 2020Inventors: Yumi Mukoyama, Tsuyoshi Saeki, Toshiaki Tokisawa, Ryoma Arai, Takashi Abe
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Patent number: 10589534Abstract: 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: GrantFiled: June 14, 2018Date of Patent: March 17, 2020Assignee: Canon Kabushiki KaishaInventors: Kyoshiro Okude, Ryoma Arai, Toshiaki Tokisawa, Takashi Abe
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Patent number: 10538096Abstract: 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: GrantFiled: June 28, 2018Date of Patent: January 21, 2020Assignee: Canon Kabushiki KaishaInventors: Takashi Abe, Toshiaki Tokisawa, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
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Publication number: 20190299648Abstract: 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: ApplicationFiled: February 28, 2019Publication date: October 3, 2019Inventors: Toshiaki Tokisawa, Kyoshiro Okude, Yumi Mukoyama, Ryoma Arai
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Publication number: 20190299649Abstract: 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: ApplicationFiled: March 22, 2019Publication date: October 3, 2019Inventors: Noboru Shimoyama, Atsushi Kohnotoh, Ryoma Arai, Tsuyoshi Saeki
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Publication number: 20190283443Abstract: 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: ApplicationFiled: June 5, 2019Publication date: September 19, 2019Inventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai
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Publication number: 20190263136Abstract: 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: ApplicationFiled: February 8, 2019Publication date: August 29, 2019Inventors: Ryoma Arai, Tsuyoshi Saeki, Toshiaki Tokisawa, Junya Kosuge
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Patent number: 10357977Abstract: 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: GrantFiled: June 26, 2018Date of Patent: July 23, 2019Assignee: Canon Kabushiki KaishaInventors: Yumi Mukoyama, Junya Kosuge, Kyoshiro Okude, Tsuyoshi Saeki, Ryoma Arai