Patents by Inventor Keigo Nakajima
Keigo Nakajima 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: 20240088343Abstract: An electrode manufacturing method includes a first step of applying an electrode liquid composition in a desired shape at a desired position on a substrate, the electrode liquid composition containing an electrode mixture material; a second step of acquiring positional information as to where the electrode liquid composition is applied; and a third step of cutting only the substrate at a desired position in a region other than an electrode mixture material region where the electrode liquid composition is applied to obtain an electrode cut out in a desired shape.Type: ApplicationFiled: February 28, 2022Publication date: March 14, 2024Inventors: Hiromichi KURIYAMA, Satoshi NAKAJIMA, Shun GOTO, Tomomasa KAJITA, Masayoshi NOMURA, Keigo TAKAUJI, Miku OHKIMOTO
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Publication number: 20230408954Abstract: An image forming apparatus includes: a photosensitive drum; a magnetic roller; a transfer belt; a drum cleaning roller for collecting toner on the photosensitive drum and discharging collected toner to the photosensitive drum; a belt cleaner; a waste toner accommodating unit; and a controller configured to perform a printing operation for forming an image on a sheet and a cleaning operation for cleaning the drum cleaning roller. The controller is configured to perform: when performing the printing operation, collecting toner on the photosensitive drum using the drum cleaning roller; and when performing the cleaning operation, discharging the toner on the drum cleaning roller collected in the collecting to the photosensitive drum; transferring the toner on the photosensitive drum onto the transfer belt; and collecting the toner on the transfer belt using the belt cleaner so that the collected toner is accommodated in the waste toner accommodating unit.Type: ApplicationFiled: September 6, 2023Publication date: December 21, 2023Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Toshio FURUKAWA, Koji OGAWA, Fan XU, Kazuma HINOUE, Hotaka KAKUTANI, Shintaro FUKUOKA, Soun KANADA, Masahiko HAYAKAWA, Marika OZAKI, Masaki UEJI, Ayaka KOMORI, Enao YAMADA, Miho ISHIDA, Keigo NAKAJIMA, Shota IRIYAMA, Kengo YADA, Yuwen WANG, Junichi HASHIMOTO
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Publication number: 20230266703Abstract: In an image forming apparatus a toner cartridge includes a toner memory storing toner identification information. The toner cartridge is detachably attachable to a drum cartridge. The drum cartridge includes a drum memory storing drum identification information. The drum cartridge is detachably attached to the main-body casing.Type: ApplicationFiled: April 20, 2023Publication date: August 24, 2023Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tadao KYOTANI, Keigo NAKAJIMA
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Patent number: 11720049Abstract: A developing cartridge includes: a developing roller rotatable about an axis extending in a first direction; a casing; a first cam and a first gear rotatable together relative to the casing about a first axis extending in the first direction; and a second cam and a second gear rotatable together relative to the casing about a second axis extending in the first direction. The second gear contacts the first gear. When the developing cartridge is attached to a drum cartridge including a photosensitive drum: at a first position of the first cam, the second cam is at a third position and the developing roller and the photosensitive drum contact each other; and at a second position of the first cam, the second cam is at a fourth position and contacts a part of the drum cartridge to move the developing cartridge to separate the developing roller from the photosensitive drum.Type: GrantFiled: May 16, 2022Date of Patent: August 8, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Nao Itabashi, Atsushi Fukaya, Naoya Kamimura, Daisuke Maeta, Keigo Nakajima
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Patent number: 11675304Abstract: In an image forming apparatus a toner cartridge includes a toner memory storing toner identification information. The toner cartridge is detachably attachable to a drum cartridge. The drum cartridge includes a drum memory storing drum identification information. The drum cartridge is detachably attached to the main-body casing.Type: GrantFiled: May 2, 2022Date of Patent: June 13, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tadao Kyotani, Keigo Nakajima
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Publication number: 20230167755Abstract: An engine valve having a shaft portion and a head portion expanding in diameter like a head at an edge of the shaft portion, and being to open and close a port provided in a cylinder head, wherein the head portion has a head front surface on a bottom side facing a combustion chamber side, a head rear surface on a top side facing the port side, and an outer peripheral surface of the head portion formed between the head front surface and the head rear surface, and the head portion is provided a mirror-finished mirror portion, and the head portion is provided a mirror-finished mirror portion on the entire area of the head front surface exposed to the combustion chamber and the entire area of the outer peripheral surface exposed to the combustion chamber.Type: ApplicationFiled: July 29, 2020Publication date: June 1, 2023Applicant: FUJI OOZX Inc.Inventors: Takahiro TSUCHIYA, Takaaki KUMAGAI, Keigo NAKAJIMA, Koji KUSHIMA, Shingo AGATA
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Publication number: 20230108945Abstract: A developing cartridge includes: a casing, a developing roller, a first agitator, a supply roller, and a second agitator. The casing is configured to accommodate toner. The developing roller is rotatable about a developing roller rotation axis extending in a first direction. The first agitator is configured to agitate the toner. The first agitator is rotatable about a first agitator rotation axis extending in the first direction. The supply roller is positioned between the first agitator and the developing roller. The supply roller is rotatable about a supply roller rotation axis extending in the first direction. The second agitator is positioned between the supply roller and the first agitator. The second agitator is rotatable about a second agitator rotation axis extending in the first direction. A rotation locus of the second agitator is positioned outside of a rotation locus of the first agitator.Type: ApplicationFiled: December 12, 2022Publication date: April 6, 2023Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki Ooka, Junichi Hashimoto, Shota Iriyama, Keigo Nakajima, Kengo Yada
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Patent number: 11537062Abstract: A developing cartridge includes: a casing, a developing roller, a first agitator, a supply roller, and a second agitator. The casing is configured to accommodate toner. The developing roller is rotatable about a developing roller rotation axis extending in a first direction. The first agitator is configured to agitate the toner. The first agitator is rotatable about a first agitator rotation axis extending in the first direction. The supply roller is positioned between the first agitator and the developing roller. The supply roller is rotatable about a supply roller rotation axis extending in the first direction. The second agitator is positioned between the supply roller and the first agitator. The second agitator is rotatable about a second agitator rotation axis extending in the first direction. A rotation locus of the second agitator is positioned outside of a rotation locus of the first agitator.Type: GrantFiled: September 16, 2021Date of Patent: December 27, 2022Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki Ooka, Junichi Hashimoto, Shota Iriyama, Keigo Nakajima, Kengo Yada
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Patent number: 11537061Abstract: There is provided image forming apparatus including: photosensitive member; developing roller configured to supply a developer to the photosensitive member; belt to which a developer image is to be transferred from the photosensitive member; sensor; and controller configured to execute a developing bias correcting process for correcting a developing bias to be applied to the developing roller. The developing bias correcting process includes: a setting process for setting testing biases, all of the testing biases being smaller than an old developing bias; a forming process for forming developer images on the belt by using the testing biases set in the setting process; a detecting process for detecting densities of the developer images formed in the forming process by the sensor; and a calculating process for calculating the developing bias based on the densities of the developer images detected in the detecting process.Type: GrantFiled: December 16, 2021Date of Patent: December 27, 2022Assignee: Brother Kogyo Kabushiki KaishaInventors: Shota Iriyama, Keigo Nakajima, Toshio Furukawa
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Publication number: 20220404759Abstract: A developing cartridge includes: a developing roller rotatable about an axis extending in a first direction; a casing; a first cam and a first gear rotatable together relative to the casing about a first axis extending in the first direction; and a second cam and a second gear rotatable together relative to the casing about a second axis extending in the first direction. The second gear contacts the first gear. When the developing cartridge is attached to a drum cartridge including a photosensitive drum: at a first position of the first cam, the second cam is at a third position and the developing roller and the photosensitive drum contact each other; and at a second position of the first cam, the second cam is at a fourth position and contacts a part of the drum cartridge to move the developing cartridge to separate the developing roller from the photosensitive drum.Type: ApplicationFiled: May 16, 2022Publication date: December 22, 2022Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Nao ITABASHI, Atsushi FUKAYA, Naoya KAMIMURA, Daisuke MAETA, Keigo NAKAJIMA
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Publication number: 20220276582Abstract: In an image forming apparatus a toner cartridge includes a toner memory storing toner identification information. The toner cartridge is detachably attachable to a drum cartridge. The drum cartridge includes a drum memory storing drum identification information. The drum cartridge is detachably attached to the main-body casing.Type: ApplicationFiled: May 2, 2022Publication date: September 1, 2022Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tadao KYOTANI, Keigo NAKAJIMA
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Patent number: 11415912Abstract: A developing cartridge includes a casing, a developing roller, a supply roller, a first agitator and a second agitator. The casing is configured to accommodate toner therein. The supply roller is configured to supply the toner to the developing roller. The first agitator is configured to agitate the toner in the casing. The second agitator is configured to agitate the toner in the casing. The second agitator is positioned between the first agitator and the supply roller. The second agitator includes a blade having a tip end configured to contact a peripheral surface of the supply roller.Type: GrantFiled: January 28, 2021Date of Patent: August 16, 2022Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Hotaka Kakutani, Kazuaki Ooka, Kengo Yada, Ayaka Komori, Shota Iriyama, Keigo Nakajima, Junichi Hashimoto
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Publication number: 20220206409Abstract: There is provided image forming apparatus including: photosensitive member; developing roller configured to supply a developer to the photosensitive member; belt to which a developer image is to be transferred from the photosensitive member; sensor; and controller configured to execute a developing bias correcting process for correcting a developing bias to be applied to the developing roller. The developing bias correcting process includes: a setting process for setting testing biases, all of the testing biases being smaller than an old developing bias; a forming process for forming developer images on the belt by using the testing biases set in the setting process; a detecting process for detecting densities of the developer images formed in the forming process by the sensor; and a calculating process for calculating the developing bias based on the densities of the developer images detected in the detecting process.Type: ApplicationFiled: December 16, 2021Publication date: June 30, 2022Inventors: Shota IRIYAMA, Keigo NAKAJIMA, Toshio FURUKAWA
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Patent number: 11372359Abstract: In an image forming apparatus a toner cartridge includes a toner memory storing toner identification information. The toner cartridge is detachably attachable to a drum cartridge. The drum cartridge includes a drum memory storing drum identification information. The drum cartridge is detachably attached to the main-body casing.Type: GrantFiled: November 12, 2020Date of Patent: June 28, 2022Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tadao Kyotani, Keigo Nakajima
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Publication number: 20220004118Abstract: A developing cartridge includes: a casing, a developing roller, a first agitator, a supply roller, and a second agitator. The casing is configured to accommodate toner. The developing roller is rotatable about a developing roller rotation axis extending in a first direction. The first agitator is configured to agitate the toner. The first agitator is rotatable about a first agitator rotation axis extending in the first direction. The supply roller is positioned between the first agitator and the developing roller. The supply roller is rotatable about a supply roller rotation axis extending in the first direction. The second agitator is positioned between the supply roller and the first agitator. The second agitator is rotatable about a second agitator rotation axis extending in the first direction. A rotation locus of the second agitator is positioned outside of a rotation locus of the first agitator.Type: ApplicationFiled: September 16, 2021Publication date: January 6, 2022Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki OOKA, Junichi HASHIMOTO, Shota IRIYAMA, Keigo NAKAJIMA, Kengo YADA
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Patent number: 11143981Abstract: A developing cartridge includes: a casing, a developing roller, a first agitator, a supply roller, and a second agitator. The casing is configured to accommodate toner. The developing roller is rotatable about a developing roller rotation axis extending in a first direction. The first agitator is configured to agitate the toner. The first agitator is rotatable about a first agitator rotation axis extending in the first direction. The supply roller is positioned between the first agitator and the developing roller. The supply roller is rotatable about a supply roller rotation axis extending in the first direction. The second agitator is positioned between the supply roller and the first agitator. The second agitator is rotatable about a second agitator rotation axis extending in the first direction. A rotation locus of the second agitator is positioned outside of a rotation locus of the first agitator.Type: GrantFiled: January 19, 2021Date of Patent: October 12, 2021Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki Ooka, Junichi Hashimoto, Shota Iriyama, Keigo Nakajima, Kengo Yada
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Publication number: 20210255567Abstract: A developing cartridge includes a casing, a developing roller, a supply roller, a first agitator and a second agitator. The casing is configured to accommodate toner therein. The supply roller is configured to supply the toner to the developing roller. The first agitator is configured to agitate the toner in the casing. The second agitator is configured to agitate the toner in the casing. The second agitator is positioned between the first agitator and the supply roller. The second agitator includes a blade having a tip end configured to contact a peripheral surface of the supply roller.Type: ApplicationFiled: January 28, 2021Publication date: August 19, 2021Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Hotaka KAKUTANI, Kazuaki OOKA, Kengo YADA, Ayaka KOMORI, Shota IRIYAMA, Keigo NAKAJIMA, Junichi HASHIMOTO
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Image forming apparatus with rotation-controllable photosensitive drum and movable developing roller
Patent number: 11061357Abstract: An image forming apparatus, having a casing, a cover, a first motor, a photosensitive drum, a second motor, a developing motor, a clutch, a contact/separation cam, a switching cam, and a controller, is provided. The controller conducts a first process, in which, when the cover is moved from an open position to a closed position, the controller drives the first motor to rotate the photosensitive drum without causing rotation of the developing roller; and a second process, in which, after a lapse of a first period since the controller started driving the first motor, the controller drives the second motor to move the contact/separation cam from the first phase to the second phase and move the switching cam from the first phase to the second phase causing the developing roller to be moved from the contacting position to the separated position while the photosensitive drum is rotating.Type: GrantFiled: December 20, 2019Date of Patent: July 13, 2021Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki Ooka, Keigo Nakajima, Masahito Saeki -
Publication number: 20210149331Abstract: In an image forming apparatus a toner cartridge includes a toner memory storing toner identification information. The toner cartridge is detachably attachable to a drum cartridge. The drum cartridge includes a drum memory storing drum identification information. The drum cartridge is detachably attached to the main-body casing.Type: ApplicationFiled: November 12, 2020Publication date: May 20, 2021Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tadao KYOTANI, Keigo NAKAJIMA
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Publication number: 20210141320Abstract: A developing cartridge includes: a casing, a developing roller, a first agitator, a supply roller, and a second agitator. The casing is configured to accommodate toner. The developing roller is rotatable about a developing roller rotation axis extending in a first direction. The first agitator is configured to agitate the toner. The first agitator is rotatable about a first agitator rotation axis extending in the first direction. The supply roller is positioned between the first agitator and the developing roller. The supply roller is rotatable about a supply roller rotation axis extending in the first direction. The second agitator is positioned between the supply roller and the first agitator. The second agitator is rotatable about a second agitator rotation axis extending in the first direction. A rotation locus of the second agitator is positioned outside of a rotation locus of the first agitator.Type: ApplicationFiled: January 19, 2021Publication date: May 13, 2021Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Kazuaki OOKA, Junichi HASHIMOTO, Shota IRIYAMA, Keigo NAKAJIMA, Kengo YADA