Patents by Inventor Taku Yokozawa
Taku Yokozawa 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: 9139008Abstract: An inkjet recording apparatus includes a recording head including a discharge port, a carriage configured to perform reciprocating scanning with the recording head mounted thereon, a main tank configured to store ink, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, and a control unit configured to control the carriage, wherein the control unit controls acceleration of the carriage such that a dynamic pressure of ink inside the supply tube becomes greater than a pressure resistance to an ink movement and a pressure resistance to an air movement in the tube.Type: GrantFiled: April 23, 2013Date of Patent: September 22, 2015Assignee: Canon Kabushiki KaishaInventors: Hiroaki Komatsu, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Masataka Kato, Tsuyoshi Ibe, Asako Tomida
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Patent number: 9114651Abstract: A recording apparatus includes: a recording unit for applying ink on a sheet by a printing head; a drying unit for drying the sheet; a measuring unit for measuring patterns on the sheet; a conveying unit for conveying the sheet; a recovering unit for performing a printing head-recovering operation; and a control unit for controlling the apparatus such that, the recording apparatus performs recording to form patterns, the conveying unit performs first conveying to convey the sheet from a recording region to a drying region, the drying unit performs drying, the conveying unit performs second conveying to convey the sheet from the drying region to a measuring region, and the measuring unit performs measuring, in sequence, wherein the recovering operation is performed at timing at least partially overlapping at least one of the first and second conveying operations, the drying operation, and the color measuring operation, after the recording operation.Type: GrantFiled: April 5, 2013Date of Patent: August 25, 2015Assignee: Canon Kabushiki KaishaInventors: Masataka Kato, Tsuyoshi Ibe, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Asako Tomida, Shin Genta, Hiroaki Komatsu
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Patent number: 9108409Abstract: The invention prevents inconveniences from being caused by ejection failure and unintended mixing of different colors. To this end, the invention performs preliminary ejection of ink after a wiping action to sweep mist adhering to a face of a printing head, in which an ejection opening is formed. Moreover, the amount of ink to be wastefully consumed by the preliminary ejection after the wiping is reduced. To this end, the number of preliminary ejections is regulated. The degree of adherence of mist to the ejection-opening-formed face depends on the amount of printing (the number of printed sheets, the number of ink ejections for printing, or the like). So, at the time of the preliminary ejection after the wiping, the number of ink ejections in the preliminary ejection is regulated in accordance with the amount of printing that has been done since the last wiping action.Type: GrantFiled: May 26, 2010Date of Patent: August 18, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Kazuo Suzuki, Kazuhiko Sato, Taku Yokozawa, Yosuke Ishii
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Patent number: 9028021Abstract: An inkjet recording apparatus includes a recording head, a carriage with the recording head mounted thereon, a main tank, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, a supply unit connected to the supply tube and configured to supply ink from the main tank to the sub-tank, and a control unit configured to control acceleration of the carriage and to control the supply unit, wherein, when an empty volume in the sub-tank is greater than or equal to an ink volume in the main tank, the supply unit is controlled to supply ink to the sub-tank.Type: GrantFiled: April 23, 2013Date of Patent: May 12, 2015Assignee: Canon Kabushiki KaishaInventors: Masaya Uetsuki, Taku Yokozawa, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida, Hiroaki Komatsu
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Patent number: 9010903Abstract: An ink jet printing apparatus inhibits the temperature of a print head from increasing excessively while preventing significant density or hue unevenness from occurring in images, without the need for a complicated structure or complicated control. Thus, the temperature of the print head is detected, and the number of scans in which the print head is to stand by until start of scanning and a standby time for each of the set number of scans by the print head are set, on the basis of the detected temperature.Type: GrantFiled: May 28, 2008Date of Patent: April 21, 2015Assignee: Canon Kabushiki KaishaInventors: Taku Yokozawa, Yuhei Oikawa, Daigoro Kanematsu, Kazuo Suzuki, Satoshi Hayashi
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Patent number: 8991959Abstract: A recording apparatus including a recording head that includes an element array of a plurality of recording elements for discharging a liquid, the plurality of recording elements in the element array being divided into groups, and a drive unit configured to drive the recording head in a driving mode selected from a plurality of driving modes including a continuous driving mode in which recording elements in each of the groups are driven in order from one end and a distributed driving mode in which recording elements in each of the groups are driven such that adjacent recording elements are not driven sequentially.Type: GrantFiled: January 11, 2012Date of Patent: March 31, 2015Assignee: Canon Kabushiki KaishaInventors: Masaki Nitta, Hiroaki Shirakawa, Yasunori Fujimoto, Taku Yokozawa
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Patent number: 8950843Abstract: There is an object of providing a printing apparatus which can restrict a variation in ejection characteristic of an ink droplet due to a temperature change of a printing head to restrict degradation in an image. The printing apparatus adjusts temperatures of the print head to first and second temperature so as to measure ejection characteristics of the print head at the first and second temperature. Then, a driving condition is generated based on the measured ejection characteristics and a printing is performed based on the measured ejection characteristics.Type: GrantFiled: May 26, 2010Date of Patent: February 10, 2015Assignee: Canon Kabushiki KaishaInventors: Yuhei Oikawa, Taku Yokozawa, Kazuo Suzuki, Satoshi Hayashi
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Patent number: 8919904Abstract: An inkjet recording apparatus predicts the volume of air bubbles generated in a storage section of a recording head based on an input recording job. When the volume of the amount of ink in the storage section of the recording head is less than the predicted volume of air bubbles, a recovery operation is performed.Type: GrantFiled: March 15, 2013Date of Patent: December 30, 2014Assignee: Canon Kabushiki KaishaInventors: Hiroaki Shirakawa, Yuhei Oikawa, Satoshi Hayashi, Taku Yokozawa, Masaki Nitta, Yosuke Ishii
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Patent number: 8851613Abstract: A printing apparatus includes a print unit, an acquisition unit, and a setting unit. The print unit performs printing on a sheet by repeating reciprocating scans of a print head. The acquisition unit acquires information on a temperature of the print head. The setting unit sets a wait time to start a next scan after one scan. The setting unit increases the wait time by a predetermined additional time for each subsequent scan once a value acquired by the acquisition unit exceeds a first threshold, unless the value falls below a second threshold.Type: GrantFiled: July 6, 2012Date of Patent: October 7, 2014Assignee: Canon Kabushiki KaishaInventors: Taku Yokozawa, Satoshi Hayashi, Masaki Nitta, Yosuke Ishii, Hiroaki Shirakawa, Yuhei Oikawa
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Patent number: 8783811Abstract: A printing apparatus, which includes a heating unit for heating a recording medium during printing, determines a pass number for multi-pass printing based on acquired information relating to the duty in each of a plurality of regions in one band of print region. The printing apparatus sets an amount of heat of the heating unit based on the acquired information.Type: GrantFiled: July 24, 2012Date of Patent: July 22, 2014Assignee: Canon Kabushiki KaishaInventors: Masaki Nitta, Satoshi Hayashi, Taku Yokozawa, Hiroaki Shirakawa, Yuhei Oikawa, Yosuke Ishii
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Patent number: 8757753Abstract: The present invention has an object to provide an inkjet printing apparatus that can realize both high quality image formation and improvement of a device life caused by the reduction of a mist amount of a processing liquid. The present invention is provided with a control unit that can independently control an ink ejection condition in an ink ejection unit and a processing-liquid ejection condition in a processing-liquid ejection unit. The control unit controls the ejection condition in each ejection unit so that the mist amount of the processing liquid ejected from the processing-liquid eject unit is smaller than that of the ink ejected from the ink eject unit.Type: GrantFiled: December 8, 2009Date of Patent: June 24, 2014Assignee: Canon Kabushiki KaishaInventors: Kazuo Suzuki, Kazuhiko Sato, Taku Yokozawa, Yosuke Ishii
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Patent number: 8746828Abstract: An ink jet recording apparatus determines the timing of executing discharge recovery processing based on the discharge amount of ink for each predetermined region discharged from a recording head, and controls the discharge recovery processing to be executed at the determined timing. Thereby, the discharge performance of the ink can be kept to be good, and the discharge recovery processing can be executed at the suitable timing without producing any deterioration of the image quality of a recorded image, and with the deterioration of throughput reduced.Type: GrantFiled: December 4, 2012Date of Patent: June 10, 2014Assignee: Canon Kabushiki KaishaInventors: Yutaka Kawamata, Taku Yokozawa
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Patent number: 8628163Abstract: An object of the present invention is to provide a printing apparatus and a printing method even with a variation in the temperature of a print head, thus keeping the quality of images resulting from printing high. Adjustment patterns used to adjust the difference in ink ejection timing between ink ejected in a forward direction and ink ejected in a backward direction during scanning are printed at a plurality of different temperatures. Adjustment values for the ink ejection timing at the respective temperatures are selected from the adjustment patterns. Then, the correction value for the ink ejection timing is calculated from the adjustment values based on the temperature detected by the detection device. Printing is then performed with the difference in ink ejection timing between the ink ejected in the forward direction and the ink ejected in the backward direction during scanning, adjusted based on the correction value.Type: GrantFiled: December 8, 2009Date of Patent: January 14, 2014Assignee: Canon Kabushiki KaishaInventors: Daigoro Kanematsu, Kazuo Suzuki, Taku Yokozawa, Satoshi Hayashi, Yuhei Oikawa
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Patent number: 8608268Abstract: A recording apparatus includes a first acquisition unit configured to acquire a speed of ink discharged from a recording head, a second acquisition unit configured to acquire information relating to a speed change based on the speed acquired by the first acquisition unit and a reference speed; a setting unit configured to set driving information relating to the recording head based on the information relating to the speed change acquired by the second acquisition unit, and a drive unit configured to drive the recording head based on the driving information set by the setting unit.Type: GrantFiled: January 21, 2011Date of Patent: December 17, 2013Assignee: Canon Kabushiki KaishaInventors: Masaki Nitta, Hiroaki Shirakawa, Yosuke Ishii, Yuhei Oikawa, Satoshi Hayashi, Taku Yokozawa
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Publication number: 20130286065Abstract: An inkjet recording apparatus includes a recording head, a carriage with the recording head mounted thereon, a main tank, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, a supply unit connected to the supply tube and configured to supply ink from the main tank to the sub-tank, and a control unit configured to control acceleration of the carriage and to control the supply unit, wherein, when an empty volume in the sub-tank is greater than or equal to an ink volume in the main tank, the supply unit is controlled to supply ink to the sub-tank.Type: ApplicationFiled: April 23, 2013Publication date: October 31, 2013Inventors: Masaya Uetsuki, Taku Yokozawa, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida, Hiroaki Komatsu
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Publication number: 20130286063Abstract: An inkjet recording apparatus includes a recording head including a discharge port, a carriage configured to perform reciprocating scanning with the recording head mounted thereon, a main tank configured to store ink, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, and a control unit configured to control the carriage, wherein the control unit controls acceleration of the carriage such that a dynamic pressure of ink inside the supply tube becomes greater than a pressure resistance to an ink movement and a pressure resistance to an air movement in the tube.Type: ApplicationFiled: April 23, 2013Publication date: October 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hiroaki Komatsu, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Masataka Kato, Tsuyoshi Ibe, Asako Tomida
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Publication number: 20130286078Abstract: A recording apparatus includes: a recording unit for applying ink on a sheet by a printing head; a drying unit for drying the sheet; a measuring unit for measuring patterns on the sheet; a conveying unit for conveying the sheet; a recovering unit for performing a printing head-recovering operation; and a control unit for controlling the apparatus such that, the recording apparatus performs recording to form patterns, the conveying unit performs first conveying to convey the sheet from a recording region to a drying region, the drying unit performs drying, the conveying unit performs second conveying to convey the sheet from the drying region to a measuring region, and the measuring unit performs measuring, in sequence, wherein the recovering operation is performed at timing at least partially overlapping at least one of the first and second conveying operations, the drying operation, and the color measuring operation, after the recording operation.Type: ApplicationFiled: April 5, 2013Publication date: October 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Masataka Kato, Tsuyoshi Ibe, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Asako Tomida, Shin Genta, Hiroaki Komatsu
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Publication number: 20130257933Abstract: An inkjet recording apparatus predicts the volume of air bubbles generated in a storage section of a recording head based on an input recording job. When the volume of the amount of ink in the storage section of the recording head is less than the predicted volume of air bubbles, a recovery operation is performed.Type: ApplicationFiled: March 15, 2013Publication date: October 3, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hiroaki Shirakawa, Yuhei Oikawa, Satoshi Hayashi, Taku Yokozawa, Masaki Nitta, Yosuke Ishii
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Publication number: 20130235107Abstract: A color measuring method includes: recording color patterns on a sheet by an inkjet head; measuring colors of the color patterns formed on the sheet; and recovering the inkjet head, wherein the recovering is prohibited within a period after the recording and before the measuring.Type: ApplicationFiled: March 5, 2013Publication date: September 12, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Tsuyoshi Ibe, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Masataka Kato, Asako Tomida, Hiroaki Komatsu, Shin Genta
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Patent number: 8523314Abstract: Suitable preliminary discharge conditions are set for a recording head using reaction liquid in bidirectional recording. While the recording head makes a reciprocating motion and scans a recording medium, a preliminary discharge of the reaction liquid is executed after recording on the recording medium from discharge ports on the rear side in a direction in which the recording head travels and a preliminary discharge of ink is executed when a preliminary discharge of the reaction liquid is not executed.Type: GrantFiled: February 16, 2010Date of Patent: September 3, 2013Assignee: Canon Kabushiki KaishaInventors: Kazuhiko Sato, Kazuo Suzuki, Taku Yokozawa, Yosuke Ishii