Patents by Inventor Yoshito Mizoguchi
Yoshito Mizoguchi 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: 8540339Abstract: An ink jet printing apparatus is provided which can stir ink efficiently and reduce user stresses by specifying the time for stirring ink in an ink tank. A stir operation that reciprocally moves a carriage for stirring ink in the ink tank is executed in parallel with a suction-based operation of sucking out ink from a cap after a print operation.Type: GrantFiled: June 13, 2007Date of Patent: September 24, 2013Assignee: Canon Kabushiki KaishaInventors: Yoshito Mizoguchi, Hitoshi Nishikori, Daisaku Ide, Satoshi Seki, Yasuo Kotaki, Tetsuya Ohashi, Ryoji Inoue
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Patent number: 8517503Abstract: An object of the present invention is to appropriately dispense treatment fluid to wipers, and to always wipe ejection-orifice formation surfaces in a favorable state regardless of an environmental change and the like. To this end, in the present invention, a treatment-fluid holding portion holds treatment fluid used in a wiping operation of wipers. When the wipers contact the treatment-fluid holding portion, the treatment fluid is transferred to the wipers. In an environment where the treatment fluid is thickened, the wipers with ink dispensed thereto are brought into contact with the treatment-fluid holding portion to supply ink to the treatment-fluid holding portion. Thus, the viscosity of the treatment fluid near a contact portion between the treatment-fluid holding portion and the wipers decreases, and the treatment fluid is sufficiently transferred to the wipers.Type: GrantFiled: May 24, 2007Date of Patent: August 27, 2013Assignee: Canon Kabushiki KaishaInventors: Yoshito Mizoguchi, Hiroshi Tajika, Yuji Konno, Hitoshi Nishikori, Daisaku Ide, Takeshi Yazawa, Satoshi Seki, Hirokazu Yoshikawa, Hideaki Takamiya, Fumiko Yano
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Ink jet printing apparatus and ink jet printing method with stir mode for stir operation of ink tank
Patent number: 8322807Abstract: The present invention provides an ink jet printing apparatus and a method for controlling an ink jet printing apparatus which, during a non-print operation excluding a print operation, can stir ink at a required time and to a required level according to the state of the ink in the ink tank. During a non-print operation excluding a print operation accompanied by a reciprocal movement of the carriage, a stir operation is executed to stir the ink in the ink tank by reciprocating the carriage according to a stir mode. As the stir mode, one of different modes is set according to an elapsed time from the previous stir operation.Type: GrantFiled: June 11, 2007Date of Patent: December 4, 2012Assignee: Canon Kabushiki KaishaInventors: Satoshi Seki, Hitoshi Nishikori, Daisaku Ide, Yoshito Mizoguchi, Yasuo Kotaki, Tetsuya Ohashi, Ryoji Inoue -
Patent number: 8201919Abstract: Image deterioration due to decrease in transfer amount, which arises when a remaining amount of wetting liquid for wet wiping is decreased, is reduced in an ink-jet printing apparatus. When the remaining amount of the wetting liquid decreases to reach a predetermined amount or less, a wetting liquid tank is moved down, and thereby an intrusion amount of a wiper into a transfer portion is made larger than a standard value. This increases an area of the wiper where the wiper comes into contact with the transfer portion, which allows the transfer amount to be maintained at a substantially same level as the reference value. This enables the transfer amount to be prevented from decreasing when the remaining amount decreases, and the transfer amount almost the same as that in an initial stage to be ensured even in a later stage of an apparatus life time.Type: GrantFiled: May 24, 2007Date of Patent: June 19, 2012Assignee: Canon Kabushiki KaishaInventors: Yoshito Mizoguchi, Hirokazu Yoshikawa, Yuji Konno, Daisaku Ide, Hajime Nagai
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Patent number: 7980649Abstract: An apparatus and method of ink jet printing is provided that poor ejection less occurs even where making a printing on a printing medium ready to cause a paper powder, such as a fine art paper. An image is to be printed on a printing medium by performing a relative movement of a printing medium and a printing head having a plurality of arrays each having a plurality of ejection openings. On this occasion, the image is printed by using ejection openings in a number changed in accordance with a type of the printing medium, out of a plurality of ejection openings on the two arrays adjacent to each other.Type: GrantFiled: December 10, 2007Date of Patent: July 19, 2011Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hiroshi Tajika, Takeshi Yazawa, Yoshito Mizoguchi, Hideaki Takamiya
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Patent number: 7914101Abstract: The present invention provides an ink jet printing apparatus that can print appropriate images by efficiently stirring ink in an ink tank in accordance with its status to homogenize it. When the elapsed time from the end of reciprocation of the carriage is shorter than a specified time, a printing operation is performed after the end of the reciprocation. The number of times that the carriage is reciprocated so as to stir the ink after the printing operation is set in accordance with the number of scans of the carriage during the printing operation.Type: GrantFiled: May 3, 2007Date of Patent: March 29, 2011Assignee: Canon Kabushiki KaishaInventors: Tetsuya Ohashi, Yasuo Kotaki, Ryoji Inoue, Yoshito Mizoguchi, Daisaku Ide
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Patent number: 7878613Abstract: Mask patterns to be used for multi-pass printing make it possible to make a print with a higher quality at a higher speed. Specifically, by performing a swapping process with adjacency forbiddance, two points in the horizontal direction, or the scanning direction of a printing head, are selected in a buffer in which codes for each scan pass are set depending on printing ratios of a gradation mask. Subsequently, codes are swapped between the two points. By this swap, adjacencies between print permitting areas are eliminated in the mask pattern. As a result, when driving frequencies set for the printing head is kept constant, the scanning speed can be doubled at minimum.Type: GrantFiled: November 9, 2006Date of Patent: February 1, 2011Assignee: Canon Kabushiki KaishaInventors: Hitoshi Nishikori, Hiroshi Tajika, Yuji Konno, Yoshito Mizoguchi, Daisaku Ide, Takeshi Yazawa, Satoshi Seki, Hirokazu Yoshikawa, Hideaki Takamiya, Fumiko Yano
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Patent number: 7798601Abstract: An amount of deposit in an ink receiving portion can be controlled using an inexpensive configuration which does not require any complicated mechanisms or control and which avoids increasing ink consumption. An ejection control section controls ejecting of ink from a printing section into an ink receiving portion. The printing section has a first ink ejecting portion that ejects ink that accumulates easily in the ink receiving portion and a second ink ejecting portion that ejects ink that is hard to accumulate in the ink receiving portion. The ejection control section changes the landing position, in the ink receiving portion, of the ink ejected from the ink ejecting portions depending on the status of accumulation of the ink in the ink receiving portion.Type: GrantFiled: November 2, 2006Date of Patent: September 21, 2010Assignee: Canon Kabushiki KaishaInventors: Hirokazu Yoshikawa, Yoshito Mizoguchi, Daisaku Ide
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Patent number: 7722143Abstract: A content (an amount of ink to be suctioned, or the number of times ink is preliminarily ejected) of the maintenance process to be performed after the ink tank replacement is made different depending on the amount of ink so far consumed from a tank which is replaced. This makes it possible to check the color mixture which would otherwise occur after the new ink tank is attached to the printing apparatus, and to concurrently manage an amount of waste ink in order that ink should not be consumed more than necessary in a case where the color mixture is less likely to occur.Type: GrantFiled: March 3, 2008Date of Patent: May 25, 2010Assignee: Canon Kabushiki KaishaInventors: Hirokazu Yoshikawa, Hitoshi Nishikori, Yoshito Mizoguchi
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Publication number: 20080158273Abstract: A content of (an amount of ink to be suctioned for, or the number of times ink is preliminarily ejected for) the maintenance process to be performed after the ink tank replacement is made different depending on the amount of ink so far consumed from a tank which is replaced. This makes it possible to check the color mixture which would otherwise occur after the new ink tank is attached to the printing apparatus, and to concurrently manage an amount of waste ink in order that ink should not be consumed more than necessary in a case where the color mixture is less likely to occur.Type: ApplicationFiled: March 3, 2008Publication date: July 3, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Hirokazu Yoshikawa, Hitoshi Nishikori, Yoshito Mizoguchi
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Patent number: 7393078Abstract: High image quality is maintained even on front and rear ends of a printing medium where deterioration in the image quality is more likely to occur due to reduction in conveyance accuracy of the printing medium. In printing on the front and rear ends, the printing medium being not supported by both conveying means respectively placed upstream and downstream of a printing point in a printing medium conveying direction, a print swath of a printing head and the amount of conveying a printing medium are reduced. Moreover, the reducing print swath and the reducing conveyance amount are designed to be decreased in the cases of selecting a printing medium for high-quality printing as well as a monochrome print mode where image distortion caused by deviation of ink-landing positions is more noticeable due to a small number of colors of ink to be used and low coverage thereof.Type: GrantFiled: September 6, 2006Date of Patent: July 1, 2008Assignee: Canon Kabushiki KaishaInventors: Takeshi Yazawa, Hiroshi Tajika, Yuji Konno, Hitoshi Nishikori, Yoshito Mizoguchi, Daisaku Ide, Satoshi Seki, Hirokazu Yoshikawa, Hideaki Takamiya, Fumiko Yano, Kosuke Yamamoto
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Publication number: 20080143772Abstract: An apparatus and method of ink jet printing is provided that poor ejection less occurs even where making a printing on a printing medium ready to cause a paper powder, such as a fine art paper. An image is to be printed on a printing medium by performing a relative movement of a printing medium and a printing head having a plurality of arrays each having a plurality of ejection openings. On this occasion, the image is printed by using ejection openings in a number changed in accordance with a type of the printing medium, out of a plurality of ejection openings on the two arrays adjacent to each other.Type: ApplicationFiled: December 10, 2007Publication date: June 19, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Konno, Hiroshi Tajika, Takeshi Yazawa, Yoshito Mizoguchi, Hideaki Takamiya
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Publication number: 20070291077Abstract: The present invention provides an ink jet printing apparatus and a method for controlling an ink jet printing apparatus which, during a non-print operation excluding a print operation, can stir ink at a required time and to a required level according to the state of the ink in the ink tank. During a non-print operation excluding a print operation accompanied by a reciprocal movement of the carriage, a stir operation is executed to stir the ink in the ink tank by reciprocating the carriage according to a stir mode. As the stir mode, one of different modes is set according to an elapsed time from the previous stir operation.Type: ApplicationFiled: June 11, 2007Publication date: December 20, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Seki, Hitoshi Nishikori, Daisaku Ide, Yoshito Mizoguchi, Yasuo Kotaki, Tetsuya Ohashi, Ryoji Inoue
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Publication number: 20070291076Abstract: The present invention provides an ink jet printing apparatus and a method for controlling an ink jet printing apparatus which can shorten the stirring duration without losing any stirring effect by stirring ink at a required time to only a required level and still perform a printing operation with no image impairments. By a reciprocal movement of the carriage according to a mode during a non-printing operation excluding a print operation that is accompanied by a reciprocal movement of the carriage, ink in an ink tank is stirred. The stir mode is set according to the color of the ink in the ink tank mounted on the carriage.Type: ApplicationFiled: June 13, 2007Publication date: December 20, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Seki, Hitoshi Nishikori, Daisaku Ide, Yoshito Mizoguchi, Yasuo Kotaki, Tetsuya Ohashi, Ryoji Inoue
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Publication number: 20070291075Abstract: An ink jet printing apparatus is provided which can stir ink efficiently and reduce user stresses by specifying the time for stirring ink in an ink tank. A stir operation that reciprocally moves a carriage for stirring ink in the ink tank is executed in parallel with a suction-based operation of sucking out ink from a cap after a print operation.Type: ApplicationFiled: June 13, 2007Publication date: December 20, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yoshito Mizoguchi, Hitoshi Nishikori, Daisaku Ide, Satoshi Seki, Yasuo Kotaki, Tetsuya Ohashi, Ryoji Inoue
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Publication number: 20070279452Abstract: Image deterioration due to decrease in transfer amount, which arises when a remaining amount of wetting liquid for wet wiping is decreased, is reduced in an ink-jet printing apparatus. When the remaining amount of the wetting liquid decreases to reach a predetermined amount or less, a wetting liquid tank is moved down, and thereby an intrusion amount of a wiper into a transfer portion is made larger than a standard value. This increases an area of the wiper where the wiper comes into contact with the transfer portion, which allows the transfer amount to be maintained at a substantially same level as the reference value. This enables the transfer amount to be prevented from decreasing when the remaining amount decreases, and the transfer amount almost the same as that in an initial stage to be ensured even in a later stage of an apparatus life time.Type: ApplicationFiled: May 24, 2007Publication date: December 6, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yoshito Mizoguchi, Hirokazu Yoshikawa, Yuji Konno, Daisaku Ide, Hajime Nagai
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Publication number: 20070279451Abstract: An object of the present invention is to appropriately dispense treatment fluid to wipers, and to always wipe ejection-orifice formation surfaces in a favorable state regardless of an environmental change and the like. To this end, in the present invention, a treatment-fluid holding portion holds treatment fluid used in a wiping operation of wipers. When the wipers contact the treatment-fluid holding portion, the treatment fluid is transferred to the wipers. In an environment where the treatment fluid is thickened, the wipers with ink dispensed thereto are brought into contact with the treatment-fluid holding portion to supply ink to the treatment-fluid holding portion. Thus, the viscosity of the treatment fluid near a contact portion between the treatment-fluid holding portion and the wipers decreases, and the treatment fluid is sufficiently transferred to the wipers.Type: ApplicationFiled: May 24, 2007Publication date: December 6, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yoshito Mizoguchi, Hiroshi Tajika, Yuji Konno, Hitoshi Nishikori, Daisaku Ide, Takeshi Yazawa, Satoshi Seki, Hirokazu Yoshikawa, Hideaki Takamiya, Fumiko Yano
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Publication number: 20070263025Abstract: The present invention provides an ink jet printing apparatus that can print appropriate images by efficiently stirring ink in an ink tank in accordance with its status to homogenize it. When the elapsed time from the end of reciprocation of the carriage is shorter than a specified time, a printing operation is performed after the end of the reciprocation. The number of times that the carriage is reciprocated so as to stir the ink after the printing operation is set in accordance with the number of scans of the carriage during the printing operation.Type: ApplicationFiled: May 3, 2007Publication date: November 15, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Ohashi, Yasuo Kotaki, Ryoji Inoue, Yoshito Mizoguchi, Daisaku Ide
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Publication number: 20070126789Abstract: Mask patterns to be used for multi-pass printing make it possible to make a print with a higher quality at a higher speed. Specifically, by performing a swapping process with adjacency forbiddance, two points in the horizontal direction, or the scanning direction of a printing head, are selected in a buffer in which codes for each scan pass are set depending on printing ratios of a gradation mask. Subsequently, codes are swapped between the two points. By this swap, adjacencies between print permitting areas are eliminated in the mask pattern. As a result, when driving frequencies set for the printing head is kept constant, the scanning speed can be doubled at minimum.Type: ApplicationFiled: November 9, 2006Publication date: June 7, 2007Applicant: CANON KABUSHIKI KAISHAInventors: HITOSHI NISHIKORI, HIROSHI TAJIKA, YUJI KONNO, YOSHITO MIZOGUCHI, DAISAKU IDE, TAKESHI YAZAWA, SATOSHI SEKI, HIROKAZU YOSHIKAWA, HIDEAKI TAKAMIYA, FUMIKO YANO
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Publication number: 20070103494Abstract: An object of the present invention is to control the amount of deposit in an ink receiving portion using an inexpensive configuration which does not require any complicated mechanisms or control and which avoids increasing ink consumption. The present invention thus has ejection control section for ejecting ink from printing section into an ink receiving portion provided opposite a print head. The printing section has a first ink ejecting portion that ejects ink that accumulates easily in the ink receiving portion and a second ink ejecting portion that ejects ink that is hard to accumulate in the ink receiving portion. The ejection control section changes the landing position, in the ink receiving portion, of the ink ejected from the ink ejecting portion depending on the status of accumulation of the ink in the ink receiving portion.Type: ApplicationFiled: November 2, 2006Publication date: May 10, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Hirokazu Yoshikawa, Yoshito Mizoguchi, Daisaku Ide