Patents by Inventor Takeshi Zengo
Takeshi Zengo 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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Publication number: 20170217210Abstract: A droplet drying device includes a plurality of light emitting devices arranged in a two-dimensional manner to irradiate droplets with light to dry the droplets, the droplets being ejected on a recording medium by an ejection unit, a regular irradiation capability portion provided in a region corresponding to an image forming region of the recording medium where an image is formed, the regular irradiation capability portion having a predetermined light irradiation capability, and a low irradiation capability portion provided in a region corresponding to a region of the recording medium set to have a lower image forming density than the image forming region, a light irradiation capability of the low irradiation capability portion being lower than the predetermined Hein irradiation capability.Type: ApplicationFiled: August 16, 2016Publication date: August 3, 2017Inventors: Takuma Ishihara, Takeshi Zengo, Takehiro Niitsu, Akira Sakamoto
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Patent number: 9688081Abstract: There is provided a droplet drying device including: a light source that irradiates, with light, and dries a droplet ejected to a recording medium by a forming unit that ejects the droplet to form an image; a reading unit that reads a specifying image in which a light emitting condition of the light source is specified and which is formed by the forming unit in a region out of an image forming region on the recording medium; and a light source controller that controls the light source such that the light source emits light in accordance with the light emitting condition specified in the specifying image read by the reading unit so as to irradiate the droplet with the light.Type: GrantFiled: August 10, 2016Date of Patent: June 27, 2017Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Zengo, Jun Isozaki, Akira Sakamoto
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Publication number: 20170050447Abstract: A liquid droplet drying device includes: a drying unit that includes a plurality of light sources emitting light to a liquid droplet ejected to a recording medium by a forming unit which ejects the liquid droplet to form an image and drying the image and in which an amount of light of each of the plurality of light sources is variable; and a correction unit that corrects the amount of light of each of the plurality of light sources so that a light amount distribution of the drying unit is within a range of a pre-decided target using light amount information obtained by reading the amount of light emitted from each of the plurality of light sources by a reading unit which reads the image formed on the recording medium by the forming unit.Type: ApplicationFiled: January 15, 2016Publication date: February 23, 2017Inventors: Takeshi Zengo, Akira Sakamoto, Jun Isozaki
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Patent number: 9550385Abstract: In the case where, by driving nozzles, test images are formed on paper so that the area of a width predetermined from an end portion in an intersecting direction that intersects with a transporting direction of the paper of a reading area of image reading units is not included in the test images, and the nozzles in an abnormal state are detected by using reading data obtained by reading by the image reading units, the application scope of the reading data applied for detection of an abnormal state is determined so that reading data of each of the test images formed by the nozzles as a detection target of an abnormal state is not repeatedly included with regard to each nozzle, and the nozzles in an abnormal state are detected by using the reading data in the determined application scope.Type: GrantFiled: August 26, 2015Date of Patent: January 24, 2017Assignee: Fuji Xerox Co., Ltd.Inventors: Masami Furuya, Takeshi Zengo
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Patent number: 9505237Abstract: There is provided a drying device. A controller is configured to control a laser intensity so that the laser intensity becomes lower than a drying intensity set as an intensity for drying a liquid droplet when a printing part printed in advance on a recording medium is included in an illumination range of a laser element on an image formation surface of the recording medium, the laser element configured to illuminate laser to the liquid droplet ejected on the image formation surface of the recording medium in accordance with an image.Type: GrantFiled: January 30, 2015Date of Patent: November 29, 2016Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Zengo, Akira Sakamoto, Naoki Morita, Takuma Ishihara
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Patent number: 9487028Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.Type: GrantFiled: May 12, 2015Date of Patent: November 8, 2016Assignee: Fuji Xerox Co., Ltd.Inventors: Yukari Motosugi, Takeshi Zengo, Takuma Ishihara, Jun Isozaki, Akira Sakamoto
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Publication number: 20160214421Abstract: In the case where, by driving nozzles, test images are formed on paper so that the area of a width predetermined from an end portion in an intersecting direction that intersects with a transporting direction of the paper of a reading area of image reading units is not included in the test images, and the nozzles in an abnormal state are detected by using reading data obtained by reading by the image reading units, the application scope of the reading data applied for detection of an abnormal state is determined so that reading data of each of the test images formed by the nozzles as a detection target of an abnormal state is not repeatedly included with regard to each nozzle, and the nozzles in an abnormal state are detected by using the reading data in the determined application scope.Type: ApplicationFiled: August 26, 2015Publication date: July 28, 2016Inventors: Masami Furuya, Takeshi Zengo
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Publication number: 20160167398Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.Type: ApplicationFiled: May 12, 2015Publication date: June 16, 2016Inventors: Yukari Motosugi, Takeshi Zengo, Takuma Ishihara, Jun Isozaki, Akira Sakamoto
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Patent number: 9340042Abstract: A drying device includes: an irradiation unit that irradiates, with laser light, a printing medium onto which ink droplets have been ejected from a droplets ejecting unit; and a control unit that controls the irradiation unit so that a temperature of ink on the printing medium becomes an ink target temperature that is determined using a thermal deformation temperature of the printing medium as a reference in case the thermal deformation temperature of the printing medium is lower than or equal to an ink drying temperature, and becomes an ink target temperature that is determined using the ink drying temperature as a reference in case the thermal deformation temperature of the printing medium is higher than the ink drying temperature.Type: GrantFiled: April 10, 2015Date of Patent: May 17, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Takeshi Zengo, Takuma Ishihara, Akira Sakamoto, Yukari Motosugi, Jun Isozaki
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Patent number: 9321282Abstract: A drying device includes a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction.Type: GrantFiled: September 2, 2014Date of Patent: April 26, 2016Assignee: Fuji Xerox Co., Ltd.Inventors: Jun Isozaki, Akira Sakamoto, Takehiro Niitsu, Yasuhiro Ogasawara, Takeshi Zengo, Naoki Morita
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Publication number: 20160082748Abstract: There is provided a drying device. A controller is configured to control a laser intensity so that the laser intensity becomes lower than a drying intensity set as an intensity for drying a liquid droplet when a printing part printed in advance on a recording medium is included in an illumination range of a laser element on an image formation surface of the recording medium, the laser element configured to illuminate laser to the liquid droplet ejected on the image formation surface of the recording medium in accordance with an image.Type: ApplicationFiled: January 30, 2015Publication date: March 24, 2016Inventors: Takeshi Zengo, Akira Sakamoto, Naoki Morita, Takuma Ishihara
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Patent number: 9186916Abstract: A drying device includes: a drying unit in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium by ejecting ink droplets from an ejecting unit by irradiating the ink with laser light; a measuring unit that measures a temperature characteristic, in a conveying direction of the recording medium, of the ink placed on the recording medium; a generation unit that generates, based on the temperature characteristic, a laser light irradiation profile with which the ink temperature will be raised by irradiation with laser light to become higher than or equal to a flex temperature at which the ink temperature starts to flex and then kept in a range being higher than or equal to the flex temperature and lower than a boiling temperature or the ink; and a control unit that controls the drying unit using the irradiation profile.Type: GrantFiled: April 20, 2015Date of Patent: November 17, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Takuma Ishihara, Yukari Motosugi, Takeshi Zengo, Jun Isozaki, Akira Sakamoto
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Publication number: 20150251449Abstract: A drying device includes a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction.Type: ApplicationFiled: September 2, 2014Publication date: September 10, 2015Inventors: Jun Isozaki, Akira Sakamoto, Takehiro Niitsu, Yasuhiro Ogasawara, Takeshi Zengo, Naoki Morita
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Patent number: 9114638Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.Type: GrantFiled: June 10, 2014Date of Patent: August 25, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuhiro Ogasawara, Naoki Morita, Manabu Numata, Akira Sakamoto, Mami Hatanaka, Yukari Motosugi, Takeshi Zengo, Jun Isozaki, Takehiro Niitsu, Atsushi Murakami, Masaki Kobayashi
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Publication number: 20150158311Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.Type: ApplicationFiled: June 10, 2014Publication date: June 11, 2015Applicant: FUJI XEROX CO., LTD.Inventors: Yasuhiro Ogasawara, Naoki Morita, Manabu Numata, Akira Sakamoto, Mami Hatanaka, Yukari Motosugi, Takeshi Zengo, Jun Isozaki, Takehiro Niitsu, Atsushi Murakami, Masaki Kobayashi
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Patent number: 8801130Abstract: An image position inspecting apparatus includes a reading unit, a generating unit and a specifying unit. The reading unit includes light receiving elements arranged with a reading resolution Rs and reads an inspection image. The generating unit generates a profile based on the read inspection image. The specifying unit acquires a position of the center of gravity of the pixels of the inspection image with respect to the light receiving elements from the profile and specifies a position of each of the pixels of the inspection image based on a phase difference which is a deviation of the acquired position of the center of gravity of the pixels with respect to a light receiving center of the light receiving elements. A resolution of the inspection image is Rp. The reading resolution Rs and the resolution Rp satisfy the following equation. And, m is a positive integer. Rp·((m+1)/2)<Rs<Rp·((m+2)/2).Type: GrantFiled: January 12, 2012Date of Patent: August 12, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Toru Nishida, Takeshi Zengo
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Patent number: 8480202Abstract: There is provided an eccentricity amount estimation device, including: a rotation body provided with plural detected portions disposed along the rotation direction at predetermined rotation angle intervals, each of the plural detected portions being formed such that from an outer peripheral end towards an inner peripheral end a width of the detected portion at a position at the peripheral inside is the same as or greater than the width at a position at the peripheral outside; a generating section that generates a pulse signal according to passing of each of the plural detected portions accompanying rotation of the rotation body; and an estimation section that estimates a physical quantity corresponding to an eccentricity amount of the rotation body, based on a high level side pulse width and a low level side pulse width within one period of the pulse signal generated by the generating section.Type: GrantFiled: February 10, 2010Date of Patent: July 9, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Susumu Kibayashi, Hiroaki Satoh, Toru Nishida, Takeshi Zengo
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Patent number: 8449061Abstract: A speed calculation device is provided. The generation component generates a plurality of pulse signals with different phases in accordance with rotation of a rotating body. The detection component detects rises and falls of respective pulses of the plurality of pulse signals generated by the generation component. The duration calculation component, each time a rise or fall is detected by the detection component, calculates a total duration of a pre-specified number of durations representing detection intervals of rises or falls detected by the detection component prior to the current rise or fall detected by the detection component. The speed calculation component calculates a speed relating to rotation of the rotating body on the basis of the total duration and a rotation angle of the rotating body that corresponds to one pulse of the pulse signals.Type: GrantFiled: May 13, 2009Date of Patent: May 28, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Toru Nishida, Hiroaki Satoh, Susumu Kibayashi, Takeshi Zengo
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Patent number: 8441677Abstract: A velocity calculation device disclosed includes a computation section that, using as a reference period at each of plural predetermined points in time a individual period detected most recently by a detection section for one or another of plural generating sections, computes for each of the reference periods an average value of the reference period and one or more individual periods for other generating sections of the plural generating sections, detected separately prior to detecting the respective reference period for pulse signals nearest to the reference period; and a calculation section that calculates a velocity related to rotation of the rotation body based on the plural average values computed by the computation section, the number of individual generating sections, and a predetermined rotation angle.Type: GrantFiled: March 18, 2010Date of Patent: May 14, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Zengo, Hiroaki Satoh, Susumu Kibayashi, Toru Nishida
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Publication number: 20130070011Abstract: An image position inspecting apparatus includes a reading unit, a generating unit and a specifying unit. The reading unit includes light receiving elements arranged with a reading resolution Rs and reads an inspection image. The generating unit generates a profile based on the read inspection image. The specifying unit acquires a position of the center of gravity of the pixels of the inspection image with respect to the light receiving elements from the profile and specifies a position of each of the pixels of the inspection image based on a phase difference which is a deviation of the acquired position of the center of gravity of the pixels with respect to a light receiving center of the light receiving elements. A resolution of the inspection image is Rp. The reading resolution Rs and the resolution Rp satisfy the following equation. And, m is a positive integer. Rp·((m+1)/2)<Rs<Rp·((m+2)/2).Type: ApplicationFiled: January 12, 2012Publication date: March 21, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Toru Nishida, Takeshi Zengo