Patents by Inventor Akihisa Saikawa
Akihisa Saikawa 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: 9144981Abstract: A liquid ejection apparatus includes a liquid ejection head including: an element substrate; a first recess having inner walls including a first side surface of the element substrate, a second side surface facing thereto, and a part of a fitting surface to which the element substrate is fitted; and a second recess having inner walls including a third side surface of the element substrate, which is a rear surface of the first side surface, a fourth side surface facing the third side surface, and another part of the fitting surface; and the liquid ejection apparatus also includes a wiping member configured to move from the second recess toward the first recess to wipe the ejection port surface. The first recess is provided with a sealing material to a level higher than the level of a sealing material in the second recess, in a direction of ejecting liquid.Type: GrantFiled: July 25, 2011Date of Patent: September 29, 2015Assignee: Canon Kabushiki KaishaInventor: Akihisa Saikawa
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Patent number: 8814322Abstract: An inkjet recording apparatus includes a recording head that includes a discharge port face on which a plurality of discharge ports for discharging ink is formed, a cap configured to cap the discharge port face, a suction recovery unit configured to suck ink from the recording head via the cap, and a control unit configured to control the suction recovery unit so that a suction amount changes based on elapsed time from when the discharge port face is capped by the cap, in a state where ink discharged from the recording head is present, wherein the control unit controls the suction recovery unit so that the suction amount decreases as the elapsed time increases when the elapsed times does not exceed a first time.Type: GrantFiled: November 25, 2009Date of Patent: August 26, 2014Assignee: Canon Kabushiki KaishaInventor: Akihisa Saikawa
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Patent number: 8353565Abstract: An ink refilling method capable of refilling ink into at least two kinds of ink cartridges having different ink capacities and having substantially the same outer configurations, the method includes a step of discriminating the kind of the ink cartridge; a step of determining the capacity of the ink cartridge on the basis of a result of the discriminating step; and a step of filling, into the ink cartridge, an amount of the ink on the basis of the capacity determined in the determining step.Type: GrantFiled: June 12, 2008Date of Patent: January 15, 2013Assignee: Canon Kabushiki KaishaInventor: Akihisa Saikawa
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Publication number: 20120026243Abstract: A liquid ejection apparatus includes a liquid ejection head including: an element substrate; a first recess having inner walls including a first side surface of the element substrate, a second side surface facing thereto, and a part of a fitting surface to which the element substrate is fitted; and a second recess having inner walls including a third side surface of the element substrate, which is a rear surface of the first side surface, a fourth side surface facing the third side surface, and another part of the fitting surface; and the liquid ejection apparatus also includes a wiping member configured to move from the second recess toward the first recess to wipe the ejection port surface. The first recess is provided with a sealing material to a level higher than the level of a sealing material in the second recess, in a direction of ejecting liquid.Type: ApplicationFiled: July 25, 2011Publication date: February 2, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Akihisa Saikawa
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Patent number: 7909423Abstract: An ink jet recording head includes an ejection outlet array including a plurality of ejection outlets; an ink flow path portion in fluid communication with the ejection outlets to supply ink to the ejection outlets; a recording element substrate provided with the ejection outlet array, the ink flow path portion and a plurality of ejection heat generating resistors, provided correspondingly to the ejection outlets, for generating thermal energy for ejecting ink; a first warming heat generating resistor which is provided in lower layers of the ejecting heat generating resistors and which is extended below the ink flow path portion; and a second warming heat generating resistor provided in an outer peripheral portion of the recording element substrate.Type: GrantFiled: June 18, 2008Date of Patent: March 22, 2011Assignee: Canon Kabushiki KaishaInventors: Akihisa Saikawa, Yoshiyuki Toge
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Publication number: 20100134548Abstract: An inkjet recording apparatus includes a recording head that includes a discharge port face on which a plurality of discharge ports for discharging ink is formed, a cap configured to cap the discharge port face, a suction recovery unit configured to suck ink from the recording head via the cap, and a control unit configured to control the suction recovery unit so that a suction amount changes based on elapsed time from when the discharge port face is capped by the cap, in a state where ink discharged from the recording head is present, wherein the control unit controls the suction recovery unit so that the suction amount decreases as the elapsed time increases when the elapsed times does not exceed a first time.Type: ApplicationFiled: November 25, 2009Publication date: June 3, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Akihisa Saikawa
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Publication number: 20090033719Abstract: An ink jet recording head includes an ejection outlet array including a plurality of ejection outlets; an ink flow path portion in fluid communication with said ejection outlets to supply ink to said ejection outlets; a recording element substrate provided with said ejection outlet array, said ink flow path portion and a plurality of ejection heat generating resistors, provided correspondingly to said ejection outlets, for generating thermal energy for ejecting ink; a first warming heat generating resistor which is provided in lower layers of said ejecting heat generating resistors and which is extended below said ink flow path portion; and a second warming heat generating resistor provided in an outer peripheral portion of said recording element substrate.Type: ApplicationFiled: June 18, 2008Publication date: February 5, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Akihisa Saikawa, Yoshiyuki Toge
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Publication number: 20080309741Abstract: An ink refilling method capable of refilling ink into at least two kinds of ink cartridges having different ink capacities and having substantially the same outer configurations, the method includes a step of discriminating the kind of the ink cartridge; a step of determining the capacity of the ink cartridge on the basis of a result of the discriminating step; and a step of filling, into the ink cartridge, an amount of the ink on the basis of the capacity determined in the determining step.Type: ApplicationFiled: June 12, 2008Publication date: December 18, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Akihisa Saikawa