Patents by Inventor Jun Isozaki
Jun Isozaki 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: 8506029Abstract: There is provided a liquid droplet circulation control apparatus including: a first circulation controller that sets a first circulation mode in which liquid is circulated with pressure control by driving a supply side pressure generator and a return side pressure generator, the supply side pressure generator supplying the liquid to the liquid droplet ejector and the return side pressure generator returning the liquid from the liquid droplet ejector; a second circulation controller that sets a second circulation mode in which the liquid is circulated by driving the supply side pressure generator and/or the return side pressure generator, such that the liquid is made to bypass at least the liquid droplet ejector; a selector that selects one or other circulation modes; and a setting unit that sets a circulation path of the liquid based on the selected circulation mode.Type: GrantFiled: November 1, 2010Date of Patent: August 13, 2013Assignees: Fuji Xerox Co., Ltd., Fujifilm CorporationInventors: Jun Isozaki, Masaki Kataoka, Koji Furukawa, Hiroshi Shibata
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Patent number: 8449087Abstract: A liquid circulating apparatus includes a liquid discharging unit for having a nozzle, a supply path, a recovery path, first and second pressure adjusting units, an opening/closing valve and a circulation controlling unit. The circulation controlling unit controls the first and second pressure adjusting units and the opening/closing valve to circulate the liquid by causing a differential pressure between the liquid at a supply side and at a recovery side with respect to the nozzle while the liquid maintains a meniscus in the nozzle. The circulation controlling unit (i) makes a differential pressure between the liquid of the supply path and the recovery path to be lower than the differential pressure in middle of the circulation while the opening/closing valve is closed when the liquid starts circulating, (ii) opens the opening/closing valve, and (iii) changes the differential pressure to the differential pressure in middle of the circulation.Type: GrantFiled: November 28, 2011Date of Patent: May 28, 2013Assignees: Fuji Xerox Co., Ltd., Fujifilm CorporationInventors: Masaki Kataoka, Jun Isozaki, Hiroshi Shibata
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Patent number: 8403439Abstract: A flow rate control device includes a pressure generating unit that delivers a liquid to a liquid reservoir unit including an ejecting port; a flow rate control unit that controls a flow rate of the pressure generating unit by performing a first flow rate control and a second flow rate control, the first flow rate control being to raise a pressure inside the liquid reservoir unit up to a target pressure at a first pressure change rate which is sufficiently high to float air bubbles adhering to a wall surface inside the liquid reservoir unit, the second flow rate control being to maintain the target pressure or to lower the pressure inside the liquid reservoir unit from the target pressure at a second pressure change rate lower than the first pressure change rate in order to eject air bubbles floating inside the liquid reservoir unit from the ejecting port.Type: GrantFiled: May 20, 2011Date of Patent: March 26, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Kumiko Tanaka, Jun Isozaki, Masaki Kataoka
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Publication number: 20130002772Abstract: A liquid supply mechanism includes: a supply pathway that supplies liquid to a plurality of ejection sections each ejecting the liquid from nozzles; a branching path that is branched off from the supply pathway and through which the liquid circulates; a buffer unit that is disposed in the branching path and that lessens pressure fluctuations occurred in the liquid in the branching path; and a changing unit that changes a pathway to the buffer unit so that the changing unit shuts the pathway to the buffer unit during maintenance for discharging the liquid from the nozzles of the ejection sections. The liquid discharged during the maintenance is greater in quantity than the liquid discharged during normal operation.Type: ApplicationFiled: November 17, 2011Publication date: January 3, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Masashi Hiratsuka, Masaki Kataoka, Jun Isozaki
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Publication number: 20120162331Abstract: A liquid circulating apparatus includes a liquid discharging unit for having a nozzle, a supply path, a recovery path, first and second pressure adjusting units, an opening/closing valve and a circulation controlling unit. The circulation controlling unit controls the first and second pressure adjusting units and the opening/closing valve to circulate the liquid by causing a differential pressure between the liquid at a supply side and at a recovery side with respect to the nozzle while the liquid maintains a meniscus in the nozzle. The circulation controlling unit (i) makes a differential pressure between the liquid of the supply path and the recovery path to be lower than the differential pressure in middle of the circulation while the opening/closing valve is closed when the liquid starts circulating, (ii) opens the opening/closing valve, and (iii) changes the differential pressure to the differential pressure in middle of the circulation.Type: ApplicationFiled: November 28, 2011Publication date: June 28, 2012Applicants: FUJIFILM CORPORATION, FUJI XEROX CO., LTD.Inventors: Masaki Kataoka, Jun Isozaki, Hiroshi Shibata
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Publication number: 20120033003Abstract: A flow rate control device includes a pressure generating unit that delivers a liquid to a liquid reservoir unit including an ejecting port; a flow rate control unit that controls a flow rate of the pressure generating unit by performing a first flow rate control and a second flow rate control, the first flow rate control being to raise a pressure inside the liquid reservoir unit up to a target pressure at a first pressure change rate which is sufficiently high to float air bubbles adhering to a wall surface inside the liquid reservoir unit, the second flow rate control being to maintain the target pressure or to lower the pressure inside the liquid reservoir unit from the target pressure at a second pressure change rate lower than the first pressure change rate in order to eject air bubbles floating inside the liquid reservoir unit from the ejecting portType: ApplicationFiled: May 20, 2011Publication date: February 9, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Kumiko Tanaka, Jun Isozaki, Masaki Kataoka
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Publication number: 20120024395Abstract: A liquid supplying apparatus includes: a first flow channel configured to be switchable between a state of communication with a liquid supply object and a state of noncommunication with the liquid supply object; a first pressure applying device which applies pressure to liquid in the first flow channel; a first pressure absorbing device which absorbs a pressure fluctuation of the liquid in the first flow channel; a first measuring device which measures a pressure increase value in the first flow channel when the first pressure applying device is operated under a standard operating condition in which pressure in the first flow channel varies relatively moderately in proportion to a liquid feed amount to the first flow channel in the state of noncommunication where the liquid supply object and the first flow channel are not communicated with each other; a comparing device which compares the pressure increase value measured by the first measuring device with a predetermined pressure increase target value; and aType: ApplicationFiled: July 29, 2011Publication date: February 2, 2012Inventors: Koji FURUKAWA, Jun Isozaki, Masaki Kataoka
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Publication number: 20120007902Abstract: A liquid supply controller includes a liquid circulation controller that includes supply and recovery units of a liquid droplet discharge unit, and that circulates liquid according to a differential pressure between the supply unit and the recovery unit, a back pressure setting unit that sets a back pressure that is a discharge pressure based on supply and recovery pressures set by the liquid circulation controller, a circulation amount obtaining unit that obtains a flow rate of the liquid circulated; a judging unit that judges whether or not the obtained flow rate is a proper value, and a differential pressure adjusting unit that adjusts the differential pressure while maintaining the back pressure within an allowable range when it is judged that the flow rate is not the proper value.Type: ApplicationFiled: March 3, 2011Publication date: January 12, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Masashi Hiratsuka, Masaki Kataoka, Jun Isozaki, Hirotake Sasaki
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Publication number: 20110316904Abstract: There is provided a liquid droplet circulation control apparatus including: a first circulation controller that sets a first circulation mode in which liquid is circulated with pressure control by driving a supply side pressure generator and a return side pressure generator, the supply side pressure generator supplying the liquid to the liquid droplet ejector and the return side pressure generator returning the liquid from the liquid droplet ejector; a second circulation controller that sets a second circulation mode in which the liquid is circulated by driving the supply side pressure generator and/or the return side pressure generator, such that the liquid is made to bypass at least the liquid droplet ejector; a selector that selects one or other circulation modes; and a setting unit that sets a circulation path of the liquid based on the selected circulation mode.Type: ApplicationFiled: November 1, 2010Publication date: December 29, 2011Applicants: FUJIFILM CORPORATION, FUJI XEROX CO., LTD.Inventors: Jun Isozaki, Masaki Kataoka, Koji Furukawa, Hiroshi Shibata
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Publication number: 20110205265Abstract: An abnormality judgment apparatus of a liquid supply system which supplies liquid from a liquid tank to a liquid ejection head via a liquid flow channel, includes: a pressure change application device which applies a pressure change to the liquid flow channel; first and second pressure measurement devices which measure a pressure in the liquid flow channel; and an abnormality judgment device which performs abnormality judgment and identification of an abnormal location in the liquid supply system, according to measurement values measured by the first and second pressure measurement devices before and after the pressure change is applied by the pressure change application device.Type: ApplicationFiled: February 11, 2011Publication date: August 25, 2011Inventors: Koji FURUKAWA, Jun Isozaki, Masaki Kataoka
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Patent number: 7954930Abstract: A liquid droplet ejecting head according to an aspect of the present invention includes a liquid droplet ejecting element for ejecting liquid droplets a liquid supply path having two or more flow ports, through which a liquid can flow, and supplying the liquid flowing in from the flow ports to the liquid droplet ejecting element, and a flow path cross-sectional area variable unit for changing the flow path cross-sectional area of the liquid supply path.Type: GrantFiled: November 7, 2007Date of Patent: June 7, 2011Assignee: Fuji Xerox Co., Ltd.Inventor: Jun Isozaki
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Publication number: 20090207226Abstract: The invention presents a pattern forming apparatus including: an intermediate transfer body; a particle supply unit, for forming a liquid receptive particle layer of a specified layer thickness by supplying liquid receptive particles, capable of receiving a recording liquid containing recording material and also capable of trapping the recording material at the surface thereof, onto the intermediate transfer body; a liquid droplet ejection unit for ejecting liquid droplets of the recording liquid on the liquid receptive particle layer on the basis of specified data, and forming a pattern of the recording material near the surface of the liquid receptive particle layer; and a transferring unit, for transferring the liquid receptive particle layer containing the recording liquid onto a transfer object, so that the pattern is placed between the transfer object (recording medium) and the liquid receptive particle layer.Type: ApplicationFiled: February 3, 2009Publication date: August 20, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Hiroshi Ikeda, Ken Hashimoto, Masahiko Fujii, Jun Isozaki, Koichi Saitoh, Naosuke Ino
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Patent number: 7413271Abstract: An ink jet injection system performs detecting an ink injection condition by ejecting ink droplets so as to form a detecting pattern on a recording medium. When the detecting pattern is formed, the ink droplets are ejected at almost the same position in the state in which the transportation of the recording medium is stopped or a feeding speed of the recording medium is set slower than that during a normal printing operation.Type: GrantFiled: February 16, 2005Date of Patent: August 19, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Masami Furuya, Jun Isozaki
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Publication number: 20080129797Abstract: A liquid droplet ejecting head according to an aspect of the present invention includes a liquid droplet ejecting element for ejecting liquid droplets a liquid supply path having two or more flow ports, through which a liquid can flow, and supplying the liquid flowing in from the flow ports to the liquid droplet ejecting element, and a flow path cross-sectional area variable unit for changing the flow path cross-sectional area of the liquid supply path.Type: ApplicationFiled: November 7, 2007Publication date: June 5, 2008Applicant: FUJI XEROX CO., LTD.Inventor: Jun Isozaki
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Publication number: 20060284951Abstract: The invention presents a pattern forming apparatus including: an intermediate transfer body; a particle supply unit, for forming a liquid receptive particle layer of a specified layer thickness by supplying liquid receptive particles, capable of receiving a recording liquid containing recording material and also capable of trapping the recording material at the surface thereof, onto the intermediate transfer body; a liquid droplet ejection unit for ejecting liquid droplets of the recording liquid on the liquid receptive particle layer on the basis of specified data, and forming a pattern of the recording material near the surface of the liquid receptive particle layer; and a transferring unit, for transferring the liquid receptive particle layer containing the recording liquid onto a transfer object, so that the pattern is placed between the transfer object (recording medium) and the liquid receptive particle layer.Type: ApplicationFiled: May 31, 2006Publication date: December 21, 2006Inventors: Hiroshi Ikeda, Ken Hashimoto, Masahiko Fujii, Jun Isozaki, Koichi Saitoh, Naosuke Ino
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Publication number: 20060152541Abstract: The droplet discharging apparatus of the present invention comprises: droplet discharging heads that discharge a discharge fluid in droplet form; multiple head drive elements that drive the droplet discharging heads; and a heat-dissipating block that is thermally connected to the respective head drive elements and which has a discharge fluid flowing conduit therein that cools the head drive elements by making the discharge fluid flow through.Type: ApplicationFiled: December 12, 2005Publication date: July 13, 2006Inventors: Jun Isozaki, Kishiharu Itazu, Naoki Morita, Satoshi Yashima
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Publication number: 20060055719Abstract: An ink jet injection system performs detecting an ink injection condition by ejecting ink droplets so as to form a detecting pattern on a recording medium. When the detecting pattern is formed, the ink droplets are ejected at almost the same position in the state in which the transportation of the recording medium is stopped or a feeding speed of the recording medium is set slower than that during a normal printing operation.Type: ApplicationFiled: February 16, 2005Publication date: March 16, 2006Inventors: Masami Furuya, Jun Isozaki
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Patent number: 6866372Abstract: An ink jet printer is disclosed which, only when ink is to be supplied, supplies ink from a main tank disposed outside a carriage and which can effect the supply of ink stably without the leakage of ink. When it is detected by an ink level sensor that the ink level in a second ink chamber of an ink tank has become lower than a predetermined position, pipes in ports are inserted respectively into slit valves provided in the second ink chamber. Then, by operating a pump, the air present in the second ink chamber is discharged by suction to increase a negative pressure in the second ink chamber, allowing ink to be supplied from a main tank into the second ink chamber. Thus, since the supply of ink is performed by a negative pressure, it is possible to prevent the leakage of ink from the portion where the pipe is inserted into the slit valve.Type: GrantFiled: February 25, 2003Date of Patent: March 15, 2005Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuyuki Oda, Ichiro Tomikawa, Atsumichi Imazeki, Fumihiko Ogasawara, Yumiko Namba, Jun Isozaki
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Patent number: 6726313Abstract: An ink jet printer is disclosed which, only when ink is to be supplied, supplies ink from a main tank disposed outside a carriage and which can effect the supply of ink stably without the leakage of ink. When it is detected by an ink level sensor that the ink level in a second ink chamber of an ink tank has become lower than a predetermined position, pipes in ports are inserted respectively into slit valves provided in the second ink chamber. Then, by operating a pump, the air present in the second ink chamber is discharged by suction to increase a negative pressure in the second ink chamber, allowing ink to be supplied from a main tank into the second ink chamber. Thus, since the supply of ink is performed by a negative pressure, it is possible to prevent the leakage of ink from the portion where the pipe is inserted into the slit valve.Type: GrantFiled: August 30, 2000Date of Patent: April 27, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuyuki Oda, Ichiro Tomikawa, Atsumichi Imazeki, Fumihiko Ogasawara, Yumiko Namba, Jun Isozaki
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Publication number: 20030128256Abstract: An ink jet printer is disclosed which, only when ink is to be supplied, supplies ink from a main tank disposed outside a carriage and which can effect the supply of ink stably without the leakage of ink. When it is detected by an ink level sensor that the ink level in a second ink chamber of an ink tank has become lower than a predetermined position, pipes in ports are inserted respectively into slit valves provided in the second ink chamber. Then, by operating a pump, the air present in the second ink chamber is discharged by suction to increase a negative pressure in the second ink chamber, allowing ink to be supplied from a main tank into the second ink chamber. Thus, since the supply of ink is performed by a negative pressure, it is possible to prevent the leakage of ink from the portion where the pipe is inserted into the slit valve.Type: ApplicationFiled: February 25, 2003Publication date: July 10, 2003Applicant: Fuji Xerox Co., Ltd.Inventors: Kazuyuki Oda, Ichiro Tomikawa, Atsumichi Imazeki, Fumihiko Ogasawara, Yumiko Namba, Jun Isozaki