Patents by Inventor Yutaka Kawamata
Yutaka Kawamata 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: 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: 8702192Abstract: This invention prevents a possible color mixing, that may occur more than a predetermined time after the wiping operation, by executing a pre-printing cleaning ejection while at the same time minimizing the amount of waste ink produced by the cleaning ejection. To this end, if a color mixing is determined as being likely to occur an elapsed time after the previous wiping operation, the pre-printing cleaning ejection uses a second ink volume U, which represents both the color mixing elimination ink volume and the ejection failure elimination ink volume. If it is decided that there is no likelihood of the color mixing occurring the elapsed time after the wiping operation, the pre-printing cleaning ejection uses the first ink volume D which represents only the ejection failure elimination ink volume.Type: GrantFiled: July 22, 2011Date of Patent: April 22, 2014Assignee: Canon Kabushiki KaishaInventors: Toshimitsu Danzuka, Kazuo Suzuki, Yutaka Kawamata, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
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Patent number: 8613492Abstract: In an inkjet apparatus using an inkjet head ejecting multiple types of inks different in viscosity after evaporation of solvent, a replacement timing for a component is judged by using a consumption amount of each type of ink and a generation rate in amount of ink droplets. Accordingly, in the case of using a large amount of ink strongly susceptible to fixed adhesion and increase in viscosity, the component is replaced at an earlier timing, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, in the case of using a large amount of ink less susceptible to fixed adhesion and increase in viscosity, the component is replaced at a later timing and thus can be used until reaching its lifetime.Type: GrantFiled: June 15, 2011Date of Patent: December 24, 2013Assignee: Canon Kabushiki KaishaInventors: Kazuo Suzuki, Yutaka Kawamata, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
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Patent number: 8469484Abstract: In an inkjet apparatus capable of ejecting an ink and a treatment liquid for insolubilizing or coagulating a color material in the ink, a replacement timing for a component of the apparatus is judged based on both the consumption amounts of the ink and treatment liquid measured when the two are consumed together and the consumption amount of the ink measured when the ink is consumed alone. Thus, the component is replaced at an earlier timing when the influence of fixed adhesion is great due to frequent ejection of both of the ink and treatment liquid, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, when the fixed adhesion slowly develops because of less-frequent ejection of both of the ink and treatment liquid, the component is replaced at a later timing and thus can be used until reaching its lifetime.Type: GrantFiled: June 16, 2011Date of Patent: June 25, 2013Assignee: Canon Kabushiki KaishaInventors: Jumpei Jogo, Yutaka Kawamata, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
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Patent number: 8342626Abstract: 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: May 25, 2007Date of Patent: January 1, 2013Assignee: Canon Kabushiki KaishaInventors: Yutaka Kawamata, Taku Yokozawa
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Publication number: 20120026230Abstract: This invention prevents a possible color mixing, that may occur more than a predetermined time after the wiping operation, by executing a pre-printing cleaning ejection while at the same time minimizing the amount of waste ink produced by the cleaning ejection. To this end, if a color mixing is determined as being likely to occur an elapsed time after the previous wiping operation, the pre-printing cleaning ejection uses a second ink volume U, which represents both the color mixing elimination ink volume and the ejection failure elimination ink volume. If it is decided that there is no likelihood of the color mixing occurring the elapsed time after the wiping operation, the pre-printing cleaning ejection uses the first ink volume D which represents only the ejection failure elimination ink volume.Type: ApplicationFiled: July 22, 2011Publication date: February 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Toshimitsu Danzuka, Kazuo Suzuki, Yutaka Kawamata, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
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Publication number: 20110310160Abstract: In an inkjet apparatus capable of ejecting an ink and a treatment liquid for insolubilizing or coagulating a color material in the ink, a replacement timing for a component of the apparatus is judged based on both the consumption amounts of the ink and treatment liquid measured when the two are consumed together and the consumption amount of the ink measured when the ink is consumed alone. Thus, the component is replaced at an earlier timing when the influence of fixed adhesion is great due to frequent ejection of both of the ink and treatment liquid, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, when the fixed adhesion slowly develops because of less-frequent ejection of both of the ink and treatment liquid, the component is replaced at a later timing and thus can be used until reaching its lifetime.Type: ApplicationFiled: June 16, 2011Publication date: December 22, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Jumpei Jogo, Yutaka Kawamata, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
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Publication number: 20110310159Abstract: In an inkjet apparatus using an inkjet head ejecting multiple types of inks different in viscosity after evaporation of solvent, a replacement timing for a component is judged by using a consumption amount of each type of ink and a generation rate in amount of ink droplets. Accordingly, in the case of using a large amount of ink strongly susceptible to fixed adhesion and increase in viscosity, the component is replaced at an earlier timing, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, in the case of using a large amount of ink less susceptible to fixed adhesion and increase in viscosity, the component is replaced at a later timing and thus can be used until reaching its lifetime.Type: ApplicationFiled: June 15, 2011Publication date: December 22, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazuo Suzuki, Yutaka Kawamata, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
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Publication number: 20070291074Abstract: 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: ApplicationFiled: May 25, 2007Publication date: December 20, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yutaka Kawamata, Taku Yokozawa
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Patent number: 6796633Abstract: Before starting printing and/or after finishing printing, a preliminary ejection of ink is performed for a cap, which covers a recording head, until the cap is almost filled (S17, S23, S38). Then, a sucking operation (S18, S24, S39) is performed to suck ink stored in the cap. Alternatively, based on a predetermined criterion such as the accumulated number of printed dots, the number of printed pages, or a print time (S71, S72), a first print operation (S73), which preliminarily ejects a predetermined amount of ink at least before starting printing or after printing, and a second print operation (S74), which preliminarily ejects more ink than the predetermined amount at least before starting printing or after printing, are alternately performed. This prevents ink from adhering to a restoring system of an ink-jet recorder and allows the sucking operation and the preliminary ejection operation to be performed smoothly.Type: GrantFiled: December 20, 2002Date of Patent: September 28, 2004Assignee: Canon Finetech Inc.Inventors: Yutaka Kawamata, Yasuyuki Takagi, Tomohiro Ishitsu
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Patent number: 6612679Abstract: The invention provides an ink-jet recording apparatus capable of automatically adjusting the feed of a recording medium without troubling a user. Such an ink-jet recording apparatus is provided with a means for forming at least two adjustment charts for one band by means of at least one nozzle disposed at both end portions of a print head, a nozzle width detecting means for detecting the nozzle width of the print head on the basis of information of two adjustment charts in the same band printed by both end portions, a feed detecting means for detecting an actual feed of the recording medium on the basis of information of adjustment charts printed in adjacent bands by either one end portion out of both end portions, and a compensating means for performing a compensation for a predetermined feed for one band of the recording medium on the basis of the detected nozzle width and the actual feed.Type: GrantFiled: December 28, 2001Date of Patent: September 2, 2003Assignee: Canon Finetech Inc.Inventors: Yutaka Kawamata, Yasuyuki Takagi, Keiji Okazawa
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Patent number: 5525558Abstract: A process for producing a carbon fiber reinforced carbon composite material, comprising dispersing a short fibrous bundle of carbon fibers which comprises a plurality of single fibers, preparing a sheet in which fibers are in the two-dimensional random orientation, impregnating with a resin or pitch, laminating and molding, and then applying a baking and densifying treatment, a dispersion degree of the bundle of carbon fibers being controlled based on the formula (1) expressing correlation between the dispersion degree of the bundle of carbon fibers and the mechanical strength of the carbon fiber reinforced composite material:Dispersion degree=A-B.times.coefficient of friction (1)wherein A and B are constants determined experimentally, to produce a carbon fiber reinforced carbon composite material having desired mechanical characteristic.Type: GrantFiled: March 17, 1994Date of Patent: June 11, 1996Assignee: Mitsubishi Chemical CorporationInventors: Kazuo Niwa, Toshihiro Fukagawa, Nobuyuki Oonishi, Takeo Matsui, Yutaka Kawamata, Hitoshi Seki
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Patent number: 4490826Abstract: A method of resetting an anode spike in a vertical type Soderberg electrolytic furnace for aluminum, comprising inserting at least one paste block prepared by molding packing paste into a configuration conforming to that of the top end of a spike in the spike pit formed after pulling out the spike, and setting the spike again.Type: GrantFiled: May 19, 1982Date of Patent: December 25, 1984Assignee: Mitsubishi Light Metal Industries LimitedInventors: Yutaka Kawamata, Akira Matsuo
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Patent number: 4445996Abstract: An anode paste for use in Soderberg-type electrolytic furnace for aluminum is disclosed, the paste comprising an aggregate and a binder, wherein the aggregate contains 20 to 35% by weight of a coke of a diameter of smaller than 0.08 mm and the weight ratio of the particles thereof of size of 0.2 to 2 mm to those of size of smaller than 0.08 mm is 0.5 to 1.3.Type: GrantFiled: June 22, 1982Date of Patent: May 1, 1984Assignee: Mitsubishi Light Metal Industries LimitedInventors: Yutaka Kawamata, Shunkichi Katsuki