Patents by Inventor Ken Nakagawa
Ken Nakagawa 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).
-
Publication number: 20230400803Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: ApplicationFiled: August 28, 2023Publication date: December 14, 2023Inventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 11774891Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: GrantFiled: August 9, 2022Date of Patent: October 3, 2023Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 11531294Abstract: An image forming apparatus includes a fixing device having a heater, a first temperature detection unit, a pair of second temperature detection units, a pair of first sheet-width detection units, a pair of second sheet-width detection units, and a control unit. The heater includes a first heat generating element, a second heat generating element having a length smaller than a length of the first heat generating element in a longitudinal direction, and a third heat generating element having a length smaller than the length of the second heat generating element in the longitudinal direction. The control unit controls a temperature of the heater based on a detection result of the pair of first sheet-width detection units, a detection result of the pair of second sheet-width detection units, and a detection result of the pair of second temperature detection units.Type: GrantFiled: November 29, 2021Date of Patent: December 20, 2022Assignee: Canon Kabushiki KaishaInventors: Tsuguhiro Yoshida, Kohei Wakatsu, Kazuhiro Doda, Yutaka Sato, Ken Nakagawa
-
Publication number: 20220390882Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: ApplicationFiled: August 9, 2022Publication date: December 8, 2022Inventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 11477377Abstract: A function relating to communication of imaging data is assigned to an operational switch of an operating unit. A control unit switches a working mode of the assigned assignment function among a stop mode in which power supply to a communication unit that communicates the imaging data is stopped, a standby mode in which standby is performed to enable the communication of the imaging data by supplying power to the communication unit, and an executing mode in which the imaging data is communicated, depending on operational duration of the operational switch. In a case where the imaging data is not communicated, the assignment function is set to the stop mode, thereby realizing power saving. Further, the working mode of the assignment function can be switched depending on the operational duration of the operational switch, which improves the operability of an imaging device.Type: GrantFiled: July 8, 2020Date of Patent: October 18, 2022Assignee: SONY CORPORATIONInventors: Ichiro Sudo, Hiroshi Sasahara, Ken Nakagawa, Takuji Moriya
-
Patent number: 11442385Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: GrantFiled: June 21, 2021Date of Patent: September 13, 2022Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Publication number: 20220082969Abstract: An image forming apparatus includes a fixing device having a heater that includes a first heating element, a second heating element having a length smaller than the first heating element length, and a third heating element having a length smaller than the second heating element length. The image forming apparatus further includes a first temperature detection unit, a control unit, second temperature detection units, first and second sheet-width detection units, and a determination unit. The control unit controls a heater temperature based on the first temperature detection unit detection result. The determination unit determines a width of the recording material based on a detection result of the first sheet-width detection units, a detection result of the second sheet-width detection units, and a detection result of the second temperature detection units.Type: ApplicationFiled: November 29, 2021Publication date: March 17, 2022Inventors: Tsuguhiro Yoshida, Kohei Wakatsu, Kazuhiro Doda, Yutaka Sato, Ken Nakagawa
-
Patent number: 11221575Abstract: An image forming apparatus includes a fixing device having a heater that includes a first heating element, a second heating element having a length smaller than the first heating element length, and a third heating element having a length smaller than the second heating element length. The image forming apparatus further includes a first temperature detection unit, a control unit, second temperature detection units, first and second sheet-width detection units, and a determination unit. The control unit controls a heater temperature based on the first temperature detection unit detection result. The determination unit determines a width of the recording material based on a detection result of the first sheet-width detection units, a detection result of the second sheet-width detection units, and a detection result of the second temperature detection units.Type: GrantFiled: September 3, 2020Date of Patent: January 11, 2022Assignee: Canon Kabushiki KaishaInventors: Tsuguhiro Yoshida, Kohei Wakatsu, Kazuhiro Doda, Yutaka Sato, Ken Nakagawa
-
Publication number: 20210333733Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: ApplicationFiled: June 21, 2021Publication date: October 28, 2021Inventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 11073778Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: GrantFiled: January 16, 2020Date of Patent: July 27, 2021Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 10999476Abstract: An image forming apparatus includes a gradation correction unit configured to perform a correction process on first image data expressing first gradation values, and output second image data expressing second gradation values. The gradation correction unit is configured to determine the second gradation values based on the first gradation values of a plurality of colors of a plurality of pixels in an area including a process target pixel and having a size corresponding to a first color misregistration amount. The gradation correction unit is further configured to determine the second gradation values such that there is no pixel in which a sum of the second gradation values of the plurality of colors exceeds a first threshold value, even when color misregistration within the first color misregistration amount occurs.Type: GrantFiled: April 9, 2020Date of Patent: May 4, 2021Assignee: Canon Kabushiki KaishaInventors: Takayuki Tanaka, Shinji Katagiri, Shuichi Tetsuno, Ken Nakagawa
-
Publication number: 20210072683Abstract: An image forming apparatus includes a fixing device having a heater that includes a first heating element, a second heating element having a length smaller than the first heating element length, and a third heating element having a length smaller than the second heating element length. The image forming apparatus further includes a first temperature detection unit, a control unit, second temperature detection units, first and second sheet-width detection units, and a determination unit. The control unit controls a heater temperature based on the first temperature detection unit detection result. The determination unit determines a width of the recording material based on a detection result of the first sheet-width detection units, a detection result of the second sheet-width detection units, and a detection result of the second temperature detection units.Type: ApplicationFiled: September 3, 2020Publication date: March 11, 2021Inventors: Tsuguhiro Yoshida, Kohei Wakatsu, Kazuhiro Doda, Yutaka Sato, Ken Nakagawa
-
Publication number: 20200412951Abstract: A function relating to communication of imaging data is assigned to an operational switch of an operating unit. A control unit switches a working mode of the assigned assignment function among a stop mode in which power supply to a communication unit that communicates the imaging data is stopped, a standby mode in which standby is performed to enable the communication of the imaging data by supplying power to the communication unit, and an executing mode in which the imaging data is communicated, depending on operational duration of the operational switch. In a case where the imaging data is not communicated, the assignment function is set to the stop mode, thereby realizing power saving. Further, the working mode of the assignment function can be switched depending on the operational duration of the operational switch, which improves the operability of an imaging device.Type: ApplicationFiled: July 8, 2020Publication date: December 31, 2020Inventors: ICHIRO SUDO, HIROSHI SASAHARA, KEN NAKAGAWA, TAKUJI MORIYA
-
Publication number: 20200358927Abstract: An image forming apparatus includes a gradation correction unit configured to perform a correction process on first image data expressing first gradation values, and output second image data expressing second gradation values. The gradation correction unit is configured to determine the second gradation values based on the first gradation values of a plurality of colors of a plurality of pixels in an area including a process target pixel and having a size corresponding to a first color misregistration amount. The gradation correction unit is further configured to determine the second gradation values such that there is no pixel in which a sum of the second gradation values of the plurality of colors exceeds a first threshold value, even when color misregistration within the first color misregistration amount occurs.Type: ApplicationFiled: April 9, 2020Publication date: November 12, 2020Inventors: Takayuki Tanaka, Shinji Katagiri, Shuichi Tetsuno, Ken Nakagawa
-
Patent number: 10788769Abstract: Let V1 be a potential difference between a photosensitive member charged by a charging member to which a second charging voltage is applied in a preparation process and a developing member to which a developing voltage is applied. Let V2 be a potential difference between the photosensitive member charged by the charging member to which a first charging voltage is applied in an image forming process and the developing member. Given this definition, a relation of |V1|<|V2| is satisfied.Type: GrantFiled: October 16, 2018Date of Patent: September 29, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shinji Katagiri, Ken Nakagawa
-
Patent number: 10742884Abstract: A function relating to communication of imaging data is assigned to an operational switch of an operating unit. A control unit switches a working mode of the assigned assignment function among a stop mode in which power supply to a communication unit that communicates the imaging data is stopped, a standby mode in which standby is performed to enable the communication of the imaging data by supplying power to the communication unit, and an executing mode in which the imaging data is communicated, depending on an operational duration of the operational switch. In a case where the imaging data is not communicated, the assignment function is set to the stop mode, thereby realizing power saving. Further, the working mode of the assignment function can be switched depending on the operational duration of the operational switch, which improves the operability of an imaging device.Type: GrantFiled: May 8, 2019Date of Patent: August 11, 2020Assignee: SONY CORPORATIONInventors: Ichiro Sudo, Hiroshi Sasahara, Ken Nakagawa, Takuji Moriya
-
Publication number: 20200233352Abstract: The heater including a substrate, a first heat generation member, a second heat generation member having a length substantially a same in a longitudinal direction as a length of the first heat generation member, a third heat generation member having a length shorter than lengths of the first heat generation member and the second heat generation member in the longitudinal direction, and a fourth heat generation member having a length shorter than length of the third heat generation member in the longitudinal direction, wherein the first heat generation member, the second heat generation member, the third heat generation member and the fourth heat generation member are arranged on the substrate.Type: ApplicationFiled: January 16, 2020Publication date: July 23, 2020Inventors: Kazuhiro Doda, Ken Nakagawa, Tsuguhiro Yoshida, Yutaka Sato, Kohei Wakatsu
-
Patent number: 10503105Abstract: A tubular film used for a fixing apparatus includes a heat generating layer, and a first conductive layer and a second conductive layer respectively provided at one end and another end of the film in a longitudinal direction of the film so as to contact the heat generating layer. The first conductive layer and the second conductive layer each has a volume resistivity that is less than that of the heat generating layer. A low resistance layer is formed in an area of the heat generating layer between the first conductive layer and the second conductive layer in the longitudinal direction, so as not to contact the first conductive layer and the second conductive layer. The low resistance layer has a volume resistivity that is less than that of the heat generating layer, and extends in a circumferential direction of the heat generating layer.Type: GrantFiled: January 11, 2019Date of Patent: December 10, 2019Assignee: Canon Kabushiki KaishaInventors: Toru Imaizumi, Ken Nakagawa, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
-
Publication number: 20190268539Abstract: A function relating to communication of imaging data is assigned to an operational switch of an operating unit 32. A control unit 310 switches a working mode of the assigned assignment function among a stop mode in which power supply to a communication unit 307 that communicates the imaging data is stopped, a standby mode in which standby is performed to enable the communication of the imaging data by supplying power to the communication unit 307, and an executing mode in which the imaging data is communicated, depending on operational duration of the operational switch. In a case where the imaging data is not communicated, the assignment function is set to the stop mode, thereby realizing power saving. Further, the working mode of the assignment function can be switched depending on the operational duration of the operational switch, which improves the operability of an imaging device.Type: ApplicationFiled: May 8, 2019Publication date: August 29, 2019Inventors: ICHIRO SUDO, HIROSHI SASAHARA, KEN NAKAGAWA, TAKUJI MORIYA
-
Patent number: 10321057Abstract: A function relating to communication of imaging data is assigned to an operational switch of an operating unit 32. A control unit 310 switches a working mode of the assigned assignment function among a stop mode in which power supply to a communication unit 307 that communicates the imaging data is stopped, a standby mode in which standby is performed to enable the communication of the imaging data by supplying power to the communication unit 307, and an executing mode in which the imaging data is communicated, depending on operational duration of the operational switch. In a case where the imaging data is not communicated, the assignment function is set to the stop mode, thereby realizing power saving. Further, the working mode of the assignment function can be switched depending on the operational duration of the operational switch, which improves the operability of an imaging device.Type: GrantFiled: July 27, 2016Date of Patent: June 11, 2019Assignee: SONY CORPORATIONInventors: Ichiro Sudo, Hiroshi Sasahara, Ken Nakagawa, Takuji Moriya