Patents by Inventor Masaki Ueji
Masaki Ueji 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: 20240103402Abstract: An image forming apparatus includes a main-body housing, a drum unit, and a toner cartridge. The drum unit includes a photosensitive drum, a drum frame, a developing roller, a toner-inlet shutter to open and close a toner-inlet opening, a cleaning member, and a collected-toner outlet shutter to open and close a collected-toner outlet opening. The toner cartridge includes a toner casing having a toner container and a collected-toner container, and a shutter-driving member having a transmission device and an operable device. The transmission device is movable by the operable device between a first position, at which the toner-inlet shutter and the collected-toner outlet shutter are located at positions to close the toner-inlet opening and the collected-toner outlet opening, and a second position, at which the toner-inlet shutter and the collected-toner outlet shutter are located at positions to open the toner-inlet opening and the collected-toner outlet opening.Type: ApplicationFiled: August 24, 2023Publication date: March 28, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Masaki UEJI, Shougo SATO
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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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Patent number: 11392083Abstract: An image forming apparatus includes a controller, a drum cartridge and a toner cartridge. The controller is configured to perform determining a value of a first initial developing bias for a first toner cartridge based on a cumulative number of drum rotations that is stored in a drum memory of the drum cartridge at the time when the cumulative dot count stored in the toner memory of the first toner cartridge is equal to zero. After determining the first initial developing bias, the controller is configured to perform determining a value of a second initial developing bias for a second toner cartridge based on the cumulative number of drum rotations that is stored in the drum memory at the time when the cumulative dot count stored in the toner memory of the second toner cartridge is equal to zero.Type: GrantFiled: January 19, 2021Date of Patent: July 19, 2022Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shunji Yoshimoto, Naoya Kamimura, Masashi Imai, Masaki Ueji, Keita Hironaka, Hotaka Kakutani
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Publication number: 20210141336Abstract: An image forming apparatus includes a controller, a drum cartridge and a toner cartridge. The controller is configured to perform determining a value of a first initial developing bias for a first toner cartridge based on a cumulative number of drum rotations that is stored in a drum memory of the drum cartridge at the time when the cumulative dot count stored in the toner memory of the first toner cartridge is equal to zero. After determining the first initial developing bias, the controller is configured to perform determining a value of a second initial developing bias for a second toner cartridge based on the cumulative number of drum rotations that is stored in the drum memory at the time when the cumulative dot count stored in the toner memory of the second toner cartridge is equal to zero.Type: ApplicationFiled: January 19, 2021Publication date: May 13, 2021Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shunji YOSHIMOTO, Naoya KAMIMURA, Masashi IMAI, Masaki UEJI, Keita HIRONAKA, Hotaka KAKUTANI
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Patent number: 10915064Abstract: An image forming apparatus includes a controller, a drum cartridge and a toner cartridge. The controller is configured to perform determining a value of a first initial developing bias for a first toner cartridge based on a cumulative number of drum rotations that is stored in a drum memory of the drum cartridge at the time when the cumulative dot count stored in the toner memory of the first toner cartridge is equal to zero. After determining the first initial developing bias, the controller is configured to perform determining a value of a second initial developing bias for a second toner cartridge based on the cumulative number of drum rotations that is stored in the drum memory at the time when the cumulative dot count stored in the toner memory of the second toner cartridge is equal to zero.Type: GrantFiled: March 24, 2020Date of Patent: February 9, 2021Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shunji Yoshimoto, Naoya Kamimura, Masashi Imai, Masaki Ueji, Keita Hironaka, Hotaka Kakutani
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Publication number: 20200310344Abstract: An image forming apparatus includes a controller, a drum cartridge and a toner cartridge. The controller is configured to perform determining a value of a first initial developing bias for a first toner cartridge based on a cumulative number of drum rotations that is stored in a drum memory of the drum cartridge at the time when the cumulative dot count stored in the toner memory of the first toner cartridge is equal to zero. After determining the first initial developing bias, the controller is configured to perform determining a value of a second initial developing bias for a second toner cartridge based on the cumulative number of drum rotations that is stored in the drum memory at the time when the cumulative dot count stored in the toner memory of the second toner cartridge is equal to zero.Type: ApplicationFiled: March 24, 2020Publication date: October 1, 2020Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shunji YOSHIMOTO, Naoya KAMIMURA, Masashi IMAI, Masaki UEJI, Keita HIRONAKA, Hotaka KAKUTANI
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Patent number: 9040217Abstract: The present invention provides a carrier for a two-component electrophotographic developer, comprising a core particle and a thermoset silicone resin layer coated thereon, wherein said layer comprises a charge control agent and is formed by heat-treatment at a temperature below the melting point of said charge control agent.Type: GrantFiled: February 26, 2009Date of Patent: May 26, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Kazuki Takatsuka, Tatsuo Imafuku, Takahiro Bito, Takeshi Satoh, Masaki Ueji
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Patent number: 8649706Abstract: Disclosed is a corona charging apparatus for electrically charging a surface of an image bearing member to which the corona charging apparatus faces and which is rotatably provided in an electrophotographic image forming apparatus, the corona charging apparatus including: a discharging electrode; a shield case that covers the discharging electrode, the shield case being opened at least in a region where the discharging electrode and the image bearing member face each other; and a sheet-like member being made from aluminum and being attached to a first surface of the shield case which first surface faces the discharging electrode.Type: GrantFiled: July 21, 2011Date of Patent: February 11, 2014Assignee: Sharp Kabushiki KaishaInventors: Toshiaki Ino, Hiroo Naoi, Katsuya Takano, Yasuhiro Nishimura, Masaki Ueji
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Patent number: 8369747Abstract: A charging device is provided. A charging device includes a charging section and a discharge product adsorption removal section. The charging section includes a shield case having a shield opening, a discharge electrode, and a rotation shaft which is parallel to a rotation axis of a photoreceptor. The discharge product adsorption removal section has an adsorption layer that adsorbs a discharge product and is disposed downward in a vertical direction of the photoreceptor. The charging section is displaceable about an axial line of the rotation shaft from a position where the shield opening opposes to the photoreceptor to a position where the shield opening opposes to the discharge product adsorption removal section.Type: GrantFiled: September 30, 2010Date of Patent: February 5, 2013Assignee: Sharp Kabushiki KaishaInventors: Masaki Ueji, Hiroo Naoi, Toshiaki Ino, Katsuya Takano, Yasuhiro Nishimura
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Publication number: 20120020702Abstract: Disclosed is a corona charging apparatus for electrically charging a surface of an image bearing member to which the corona charging apparatus faces and which is rotatably provided in an electrophotographic image forming apparatus, the corona charging apparatus including: a discharging electrode; a shield case that covers the discharging electrode, the shield case being opened at least in a region where the discharging electrode and the image bearing member face each other; and a sheet-like member being made from aluminum and being attached to a first surface of the shield case which first surface faces the discharging electrode.Type: ApplicationFiled: July 21, 2011Publication date: January 26, 2012Inventors: Toshiaki INO, Hiroo NAOI, Katsuya TAKANO, Yasuhiro NISHIMURA, Masaki UEJI
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Publication number: 20110081161Abstract: A charging device is provided. A charging device includes a charging section and a discharge product adsorption removal section. The charging section includes a shield case having a shield opening, a discharge electrode, and a rotation shaft which is parallel to a rotation axis of a photoreceptor. The discharge product adsorption removal section has an adsorption layer that adsorbs a discharge product and is disposed downward in a vertical direction of the photoreceptor. The charging section is displaceable about an axial line of the rotation shaft from a position where the shield opening opposes to the photoreceptor to a position where the shield opening opposes to the discharge product adsorption removal section.Type: ApplicationFiled: September 30, 2010Publication date: April 7, 2011Inventors: Masaki UEJI, Hiroo Naoi, Toshiaki Ino, Katsuya Takano, Yasuhiro Nishimura
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Publication number: 20090226218Abstract: The present invention provides a carrier for a two-component electrophotographic developer, comprising a core particle and a thermoset silicone resin layer coated thereon, wherein said layer comprises a charge control agent and is formed by heat-treatment at a temperature below the melting point of said charge control agent.Type: ApplicationFiled: February 26, 2009Publication date: September 10, 2009Inventors: Kazuki Takatsuka, Tatsuo Imafuku, Takahiro Bito, Takeshi Satoh, Masaki Ueji