Patents by Inventor Masahiro Tsujibayashi
Masahiro Tsujibayashi 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: 11960219Abstract: An image forming apparatus controls a generation circuit to modulate a DC component of a developing voltage based on a first correction component such that a density unevenness is reduced. The image forming apparatus further restricts the first correction component for modulating the DC component of the developing voltage such that fogging of toner that may occur on a non-exposure region which is not exposed by an exposure unit and adhesion to a photosensitive member of carrier included in a developer are reduced.Type: GrantFiled: November 3, 2022Date of Patent: April 16, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Shohei Okumura, Shinya Suzuki, Masahiro Tsujibayashi
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Patent number: 11934131Abstract: An image forming apparatus includes an image forming unit includes a photosensitive member; a charging unit configured to uniformly charge the photosensitive member; an exposure unit configured to form an electrostatic latent image on the photosensitive member by scanning the charged photosensitive member with laser light; and a developing device configured to develop the electrostatic latent image to form an image on the photosensitive member, a reading unit configured to read a test image, which is formed by the image forming unit, for detecting image density of the image, and a controller configured to: control the image forming unit to form the test image; detect periodic fluctuation of the image density based on a detection result of the test image which is acquired by controlling the reading unit to read the test image; and correct an image forming condition to suppress the detected fluctuation.Type: GrantFiled: October 21, 2022Date of Patent: March 19, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Masahiro Tsujibayashi, Shinya Suzuki, Shohei Okumura
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Publication number: 20240013499Abstract: An image processing apparatus generates an image pertaining to a subject. The apparatus obtains a captured image and asperity information of the subject; generates 3D data of the subject based on the captured image and the asperity information obtained; makes a change instruction to change a form of the 3D data generated; and generates, as the image pertaining to the subject, an image corresponding to the 3D data changed based on the change instruction.Type: ApplicationFiled: June 23, 2023Publication date: January 11, 2024Inventors: KIYOKATSU IKEMOTO, YOSUKE EGUCHI, TAKUYA ISHIBASHI, SHINGO MORI, KANJI SUZUKI, MASAHIRO TSUJIBAYASHI, TAISEI MORI
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Patent number: 11733631Abstract: An image forming apparatus includes an image forming unit configured to convey a recording medium and form an image on the recording medium based on an image forming condition; and a controller configured to control the image forming unit to form a test image and a scale image extending in a conveyance direction in which the recording medium is conveyed, obtain user instruction information related to a density fluctuation of the test image in the conveyance direction, and generate the image forming condition to suppress image density unevenness in the conveyance direction in an image to be formed by the image forming unit based on the user instruction information.Type: GrantFiled: July 19, 2022Date of Patent: August 22, 2023Assignee: Canon Kabushiki KaishaInventors: Kimiaki Yamaguchi, Shinya Suzuki, Masahiro Tsujibayashi, Shohei Okumura
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Patent number: 11726421Abstract: An image forming apparatus includes an image forming unit configured to form an image on an image carrier, a transfer unit configured to transfer the image from the image carrier to a sheet, a reader configured to read a pattern image on the sheet while conveying the sheet, a sensor configured to measure a measuring image on the image carrier, and a controller configured to control the image forming unit to form the pattern image and the measuring image while forming images on a plurality of sheets, control the reader to read the pattern image, control the sensor to measure the measuring image, and generate an image forming condition based on a result of reading the pattern image by the reader and a result of measuring the measuring image by the sensor.Type: GrantFiled: May 25, 2022Date of Patent: August 15, 2023Assignee: Canon Kabushiki KaishaInventors: Sumito Tanaka, Masahiro Tsujibayashi
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Publication number: 20230145679Abstract: An image forming apparatus is configured to control a generation circuit to modulate a DC component of a developing voltage based on a first correction component such that a density unevenness is reduced. The image forming apparatus is further configured to restrict the first correction component for modulating the DC component of the developing voltage such that fogging of toner that may occur on a non-exposure region which is not exposed by an exposure unit and adhesion to a photosensitive member of carrier included in a developer are reduced.Type: ApplicationFiled: November 3, 2022Publication date: May 11, 2023Inventors: Shohei Okumura, Shinya Suzuki, Masahiro Tsujibayashi
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Publication number: 20230125186Abstract: An image forming apparatus includes an image forming unit configured to form an image on a rotating photosensitive member to transfer the image on a recording medium, and a controller configured to control the image forming unit to form a test image and a scale correlated with a phase of the photosensitive member on a recording medium, acquire information related to a determination result, which is determined by a user based on the scale, of correspondence relationship between an uneven density of the test image and the phase of the photosensitive member, and control an uneven density in a rotating direction of the photosensitive member which occurs in the image formed by the image forming unit based on the information.Type: ApplicationFiled: October 21, 2022Publication date: April 27, 2023Inventors: Shinya Suzuki, Masahiro Tsujibayashi, Kimiaki Yamaguchi, Shohei Okumura
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Publication number: 20230128451Abstract: An image forming apparatus includes an image forming unit includes a photosensitive member; a charging unit configured to uniformly charge the photosensitive member; an exposure unit configured to form an electrostatic latent image on the photosensitive member by scanning the charged photosensitive member with laser light; and a developing device configured to develop the electrostatic latent image to form an image on the photosensitive member, a reading unit configured to read a test image, which is formed by the image forming unit, for detecting image density of the image, and a controller configured to: control the image forming unit to form the test image; detect periodic fluctuation of the image density based on a detection result of the test image which is acquired by controlling the reading unit to read the test image; and correct an image forming condition to suppress the detected fluctuation.Type: ApplicationFiled: October 21, 2022Publication date: April 27, 2023Inventors: Masahiro Tsujibayashi, Shinya Suzuki, Shohei Okumura
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Publication number: 20230113467Abstract: An image forming apparatus includes: an image forming unit comprising: a photosensitive member configured to rotate; a charging unit configured to charge the photosensitive member based on a charging bias; an exposure unit configured to expose the photosensitive member charged by the charging unit with laser light to form an electrostatic latent image on the photosensitive member; and a developing device configured to develop the electrostatic latent image based on a development bias to form an image on the photosensitive member, a reading unit configured to read a test image formed by the image forming unit, and a controller configured to: control the image forming unit to form the test image; control the reading unit to read the test image.Type: ApplicationFiled: October 6, 2022Publication date: April 13, 2023Inventors: Shinya Suzuki, Shohei Okumura, Masahiro Tsujibayashi
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Publication number: 20230025235Abstract: An image forming apparatus comprising: an image forming unit configured to convey a recording medium, and form an image on the recording medium based on an image forming condition; and a controller configured to control the image forming unit to form a test image and a scale image extending a conveyance direction in which the recording medium is conveyed, obtain user instruction information related to a density fluctuation of the test image in the conveyance direction, and to generate the image forming condition to suppresses image density unevenness in the conveyance direction to an image to be formed by the image forming unit based on the user instruction information.Type: ApplicationFiled: July 19, 2022Publication date: January 26, 2023Inventors: Kimiaki Yamaguchi, Shinya Suzuki, Masahiro Tsujibayashi, Shohei Okumura
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Publication number: 20220382199Abstract: An image forming apparatus includes an image forming unit configured to form an image on an image carrier, a transfer unit configured to transfer the image from the image carrier to a sheet, a reader configured to read a pattern image on the sheet while conveying the sheet, a sensor configured to measure a measuring image on the image carrier, and a controller configured to control the image forming unit to form the pattern image and the measuring image while forming images on a plurality of sheets, control the reader to read the pattern image, control the sensor to measure the measuring image, and generate an image forming condition based on a result of reading the pattern image by the reader and a result of measuring the measuring image by the sensor.Type: ApplicationFiled: May 25, 2022Publication date: December 1, 2022Inventors: Sumito Tanaka, Masahiro Tsujibayashi
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Patent number: 10915047Abstract: An image forming apparatus includes a control portion configured to output, in a test mode, a recording member which has passed through a fixing nip portion in a case of a first temperature difference in which a center part temperature of a first rotary member is higher than an end part temperature of the first rotary member and a recording member which has passed through the fixing nip portion in a case of a second temperature difference in which the center part temperature is lower than the end part temperature by one operation of starting test mode to the input portion.Type: GrantFiled: January 27, 2020Date of Patent: February 9, 2021Assignee: Canon Kabushiki KaishaInventors: Takuma Tadomi, Daigo Matsuura, Shigeaki Takada, Masayuki Tamaki, Yasuharu Chiyoda, Masahiro Tsujibayashi
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Publication number: 20200249597Abstract: An image forming apparatus includes a control portion configured to output, in a test mode, a recording member which has passed through a fixing nip portion in a case of a first temperature difference in which a center part temperature of a first rotary member is higher than an end part temperature of the first rotary member and a recording member which has passed through the fixing nip portion in a case of a second temperature difference in which the center part temperature is lower than the end part temperature by one operation of starting test mode to the input portion.Type: ApplicationFiled: January 27, 2020Publication date: August 6, 2020Inventors: Takuma Tadomi, Daigo Matsuura, Shigeaki Takada, Masayuki Tamaki, Yasuharu Chiyoda, Masahiro Tsujibayashi
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Patent number: 10691053Abstract: A pair of rotary members nips and conveys a recording material and a heating element heats a toner image on the recording material via the pair of rotary members. A separating mechanism separates the pair of rotary members. A heating time recording portion records a cumulative length of a period during which the pair of rotary members in an abutted state is heated as a first heating time and a cumulative length of the period during which the pair of rotary members in a separated state is heated as a second heating time. A determining portion determines a remaining lifetime of the pair of rotary members using the first and second heating times and data indicating a relationship between length of the period during which the pair of rotary members is heated and decrease in lifetime of the pair of rotary members.Type: GrantFiled: July 8, 2019Date of Patent: June 23, 2020Assignee: Canon Kabushiki KaishaInventors: Shigeaki Takada, Daigo Matsuura, Masayuki Tamaki, Yasuharu Chiyoda, Masahiro Tsujibayashi
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Patent number: 10649391Abstract: An image forming apparatus includes a rotary member, a web, a moving unit, a detecting unit configured to detect a predetermined position, and a control portion. The control portion informs, in a case where an actual moving amount per one winding operation is a first moving amount, the replacement of the web, if a number of sheets of recording materials on which images have been formed after the predetermined position is detected reaches a first number of sheets. The control portion informs, in a case where the actual moving amount per one winding operation is a second moving amount which is greater than the first moving amount, the replacement of the web, if a number of sheets of recording materials on which images have been formed after the predetermined position is detected reaches a second number of sheets which is less than the first number of sheets.Type: GrantFiled: August 16, 2019Date of Patent: May 12, 2020Assignee: Canon Kabushiki KaishaInventors: Masayuki Tamaki, Shigeaki Takada, Daigo Matsuura, Yasuharu Chiyoda, Masahiro Tsujibayashi, Kengo Koyama
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Publication number: 20200073314Abstract: An image forming apparatus includes a rotary member, a web, a moving unit, a detecting unit configured to detect a predetermined position, and a control portion. The control portion informs, in a case where an actual moving amount per one winding operation is a first moving amount, the replacement of the web, if a number of sheets of recording materials on which images have been formed after the predetermined position is detected reaches a first number of sheets. The control portion informs, in a case where the actual moving amount per one winding operation is a second moving amount which is greater than the first moving amount, the replacement of the web, if a number of sheets of recording materials on which images have been formed after the predetermined position is detected reaches a second number of sheets which is less than the first number of sheets.Type: ApplicationFiled: August 16, 2019Publication date: March 5, 2020Inventors: Masayuki Tamaki, Shigeaki Takada, Daigo Matsuura, Yasuharu Chiyoda, Masahiro Tsujibayashi, Kengo Koyama
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Publication number: 20200033784Abstract: A pair of rotary members nips and conveys a recording material and a heating element heats a toner image on the recording material via the pair of rotary members. A separating mechanism separates the pair of rotary members. A heating time recording portion records a cumulative length of a period during which the pair of rotary members in an abutted state is heated as a first heating time and a cumulative length of the period during which the pair of rotary members in a separated state is heated as a second heating time. A determining portion determines a remaining lifetime of the pair of rotary members using the first and second heating times and data indicating a relationship between length of the period during which the pair of rotary members is heated and decrease in lifetime of the pair of rotary members.Type: ApplicationFiled: July 8, 2019Publication date: January 30, 2020Inventors: Shigeaki Takada, Daigo Matsuura, Masayuki Tamaki, Yasuharu Chiyoda, Masahiro Tsujibayashi
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Publication number: 20180321634Abstract: An image forming apparatus includes an image forming station, a mounting portion for mounting one of fixing devices, each including a first roller and a second roller which cooperate to form a nip for fixing a toner image on a sheet fed from the image forming station, a rubbing roller configured to rub a surface of the first roller, a storing portion capable of storing information, a counter for counting sheets fed to the fixing device mounted on the mounting portion and to store a number indicative of the number counted by the counter in the storing portion of the fixing device, and an executing portion for effecting a rubbing treatment to the first roller of the fixing device, when the number counted by the counter on the basis of the number in the storing portion of the fixing device mounted on the mounting portion exceeds a predetermined number.Type: ApplicationFiled: July 18, 2018Publication date: November 8, 2018Inventors: Katsuya Nakama, Satoru Yamamoto, Masahiro Tsujibayashi, Yasuharu Chiyoda, Nobuhiro Kikuchi, Akinobu Nishikata, Akihiro Kawakita, Toshiyuki Miyake, Koji Yumoto, Riki Fukuhara
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Publication number: 20180307168Abstract: An image forming apparatus includes an input portion into which a job is to be input, an image forming portion configured to form a toner image on a recording material to execute the job input into the input portion, a fixing portion configured to fix, on the recording material, the toner image formed by the image forming portion, the fixing portion being capable of being replaced with another fixing portion depending on a content of the job, a selecting portion configured to prompt an operator to select one of a plurality of modes before a plurality of jobs are successively reserved, and a controller configured to control the execution order of reserved jobs. The controller can change the execution order of the plurality of jobs so as to decrease the number of times of replacement of the fixing portion, or the controller can maintain the execution order of the plurality of jobs in a reserved order.Type: ApplicationFiled: June 27, 2018Publication date: October 25, 2018Inventors: Nobuhiro Kikuchi, Yasuharu Chiyoda, Masahiro Tsujibayashi, Satoru Yamamoto, Katsuya Nakama
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Patent number: 10054881Abstract: An image heating apparatus includes a first heater for heating a first roller, a second heater for heating a second roller, a first sensor for detecting a temperature of a region of an endless belt supported by the first roller, a second sensor for detecting a temperature of a region of the endless belt supported by the second roller, and a controller for controlling energization to the first heater and to the second heater. The controller executes a first mode in which the energization to the first heater is controlled using an output of the first sensor and the energization to the second heater is controlled using an output of the second sensor, and a second mode in which the energization to the first heater and the second heater is controlled using the output of the first sensor without using the output of the second sensor.Type: GrantFiled: March 31, 2017Date of Patent: August 21, 2018Assignee: Canon Kabushiki KaishaInventors: Masahiro Tsujibayashi, Nobuhiro Kikuchi