Patents by Inventor Tomoya Ichikawa
Tomoya Ichikawa 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: 20200233335Abstract: A developing cartridge includes: a casing configured to accommodate therein toner; a developing roller; a supply roller configured to supply the toner to the developing roller; a layer thickness regulation blade in contact with a circumferential surface of the developing roller; a developing electrode electrically connected to the developing roller; and a supply electrode electrically connected to the supply roller and the layer thickness regulation blade. The supply electrode includes: an electrode member electrically connected to a rotation shaft of the supply roller and movable in a direction perpendicular to the rotation shaft; and a connection member in contact with and electrically connecting the electrode member and the layer thickness regulation blade. The electrode member is movable relative to the connection member in the direction perpendicular to the rotation shaft in a state where the electrode member is in contact with the connection member.Type: ApplicationFiled: April 9, 2020Publication date: July 23, 2020Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Atsushi FUKAYA, Tomoya ICHIKAWA, Koji ABE, Naoya KAMIMURA
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Patent number: 10663916Abstract: A first cartridge support is configured to support a drum cartridge. The first cartridge support is configured to move in a first direction between a first position at which the drum cartridge is mounted on a housing and a second position at which the drum cartridge is detachable. A second cartridge support is configured to support a development cartridge. The second cartridge support is configured to move in the first direction between a third position at which the development cartridge is mounted on the drum cartridge and a fourth position at which the development cartridge is detachable. In a state where the second cartridge support is located at the third position, the second cartridge support is located between the first cartridge support located at the first position and a cover located at a closed position with respect to the first direction.Type: GrantFiled: July 16, 2019Date of Patent: May 26, 2020Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shougo Sato, Tomoya Ichikawa
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Patent number: 10663917Abstract: A first drawer configured to support a drum cartridge moves in a first direction between a first mount position and a first detachment position. A second drawer configured to support a development cartridge moves in the first direction between a second mount position and a second detachment position. The second drawer is located between the first drawer located at the first mount position and a cover located at a closed position with respect to the first direction in a state where the second drawer is located at the second mount position. A lock member moves between a lock position at which the first drawer and the second drawer are locked together and a lock release position at which a lock state between the first drawer and the second drawer is released. A lock release member causes the lock member at the lock position to move to the lock release position.Type: GrantFiled: July 22, 2019Date of Patent: May 26, 2020Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya Ichikawa, Shougo Sato
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Patent number: 10649366Abstract: A developing cartridge includes: a casing configured to accommodate therein toner; a developing roller; a supply roller configured to supply the toner to the developing roller; a layer thickness regulation blade in contact with a circumferential surface of the developing roller; a developing electrode electrically connected to the developing roller; and a supply electrode electrically connected to the supply roller and the layer thickness regulation blade. The supply electrode includes: an electrode member electrically connected to a rotation shaft of the supply roller and movable in a direction perpendicular to the rotation shaft; and a connection member in contact with and electrically connecting the electrode member and the layer thickness regulation blade. The electrode member is movable relative to the connection member in the direction perpendicular to the rotation shaft in a state where the electrode member is in contact with the connection member.Type: GrantFiled: July 30, 2019Date of Patent: May 12, 2020Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Atsushi Fukaya, Tomoya Ichikawa, Koji Abe, Naoya Kamimura
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Publication number: 20200096936Abstract: A first drawer configured to support a drum cartridge moves in a first direction between a first mount position and a first detachment position. A second drawer configured to support a development cartridge moves in the first direction between a second mount position and a second detachment position. The second drawer is located between the first drawer located at the first mount position and a cover located at a closed position with respect to the first direction in a state where the second drawer is located at the second mount position. A lock member moves between a lock position at which the first drawer and the second drawer are locked together and a lock release position at which a lock state between the first drawer and the second drawer is released. A lock release member causes the lock member at the lock position to move to the lock release position.Type: ApplicationFiled: July 22, 2019Publication date: March 26, 2020Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya ICHIKAWA, Shougo SATO
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Publication number: 20200089159Abstract: A first cartridge support is configured to support a drum cartridge. The first cartridge support is configured to move in a first direction between a first position at which the drum cartridge is mounted on a housing and a second position at which the drum cartridge is detachable. A second cartridge support is configured to support a development cartridge. The second cartridge support is configured to move in the first direction between a third position at which the development cartridge is mounted on the drum cartridge and a fourth position at which the development cartridge is detachable. In a state where the second cartridge support is located at the third position, the second cartridge support is located between the first cartridge support located at the first position and a cover located at a closed position with respect to the first direction.Type: ApplicationFiled: July 16, 2019Publication date: March 19, 2020Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shougo SATO, Tomoya ICHIKAWA
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Publication number: 20190369548Abstract: An image forming apparatus including: a main body housing; a drawer; a developing cartridge detachably supported by the drawer; a toner container configured to be mounted to and demounted from the main body housing; and a supply tube being movable between a connection position at which the supply tube is connected to the developing cartridge and is capable of supplying toner from the toner container to the developing cartridge supported by the drawer and a non-connection position at which the supply tube is not connected to the developing cartridge, wherein in a case where the drawer is moved from an inner position to an outer position in a state where the developing cartridge is supported by the drawer, the supply tube comes into contact with a part of the developing cartridge and is thus moved from the connection position to the non-connection position.Type: ApplicationFiled: May 30, 2019Publication date: December 5, 2019Inventor: Tomoya Ichikawa
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Publication number: 20190361391Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: ApplicationFiled: August 7, 2019Publication date: November 28, 2019Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita SHIMIZU, Tomoya ICHIKAWA, Takashi SHIMIZU, Kazuna TAGUCHI
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Publication number: 20190354037Abstract: A developing cartridge includes: a casing configured to accommodate therein toner; a developing roller; a supply roller configured to supply the toner to the developing roller; a layer thickness regulation blade in contact with a circumferential surface of the developing roller; a developing electrode electrically connected to the developing roller; and a supply electrode electrically connected to the supply roller and the layer thickness regulation blade. The supply electrode includes: an electrode member electrically connected to a rotation shaft of the supply roller and movable in a direction perpendicular to the rotation shaft; and a connection member in contact with and electrically connecting the electrode member and the layer thickness regulation blade. The electrode member is movable relative to the connection member in the direction perpendicular to the rotation shaft in a state where the electrode member is in contact with the connection member.Type: ApplicationFiled: July 30, 2019Publication date: November 21, 2019Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Atsushi FUKAYA, Tomoya ICHIKAWA, Koji ABE, Naoya KAMIMURA
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Patent number: 10466646Abstract: A photosensitive drum is rotatable about a first axis extending in a particular direction. A frame rotatably supports the photosensitive drum. A developing roller is rotatable according to driving force about a second axis extending in the particular direction. A surface of the developing roller contacts a surface of the photosensitive drum through toner. A resistance generating member generates a resistance torque TQ1 serving as resistance between the frame and photosensitive drum in a case where the photosensitive drum rotates relative to the frame. In a case where the developing roller rotates according to the driving force in a state where the surface of the developing roller contacts the surface of the photosensitive drum through toner, the resistance torque TQ1 is smaller than a torque TQ2 that causes the photosensitive drum to rotate due to friction between the surface of the developing roller and the surface of the photosensitive drum.Type: GrantFiled: March 22, 2018Date of Patent: November 5, 2019Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya Ichikawa, Takashi Shimizu, Masaaki Furukawa, Naoya Kamimura, Takashi Yasuda, Masanari Yoshikawa, Koji Abe
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Patent number: 10379492Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: GrantFiled: February 25, 2019Date of Patent: August 13, 2019Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita Shimizu, Tomoya Ichikawa, Takashi Shimizu, Kazuna Taguchi
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Publication number: 20190187610Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: ApplicationFiled: February 25, 2019Publication date: June 20, 2019Applicant: Brother Kogyo Kabushiki KaishaInventors: Keita Shimizu, Tomoya Ichikawa, Takashi Shimizu, Kazuna Taguchi
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Patent number: 10241467Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: GrantFiled: April 19, 2018Date of Patent: March 26, 2019Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita Shimizu, Tomoya Ichikawa, Takashi Shimizu, Kazuna Taguchi
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Publication number: 20190033779Abstract: A photosensitive drum is rotatable about a first axis extending in a particular direction. A frame rotatably supports the photosensitive drum. A developing roller is rotatable according to driving force about a second axis extending in the particular direction. A surface of the developing roller contacts a surface of the photosensitive drum through toner. A resistance generating member generates a resistance torque TQ1 serving as resistance between the frame and photosensitive drum in a case where the photosensitive drum rotates relative to the frame. In a case where the developing roller rotates according to the driving force in a state where the surface of the developing roller contacts the surface of the photosensitive drum through toner, the resistance torque TQ1 is smaller than a torque TQ2 that causes the photosensitive drum to rotate due to friction between the surface of the developing roller and the surface of the photosensitive drum.Type: ApplicationFiled: March 22, 2018Publication date: January 31, 2019Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya ICHIKAWA, Takashi SHIMIZU, Masaaki FURUKAWA, Naoya KAMIMURA, Takashi YASUDA, Masanari YOSHIKAWA, Koji ABE
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Patent number: 10108130Abstract: A developer cartridge attachable to a drum cartridge including a photosensitive drum is provided. The developer cartridge includes a casing configured to store toner therein, a developer roller rotatable about a first axis extending in an axial direction, and a developer electrode electrically connectable with the developer roller. The developer electrode is configured to be in contact with a first electrode of an image forming apparatus along the axial direction. In a state where the developer cartridge is attached to the drum cartridge, a portion of the developer electrode faces a surface of a lateral wall of the drum cartridge on an opposite side to a surface facing the casing.Type: GrantFiled: March 27, 2017Date of Patent: October 23, 2018Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya Ichikawa, Takashi Shimizu
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Publication number: 20180239303Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: ApplicationFiled: April 19, 2018Publication date: August 23, 2018Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita SHIMIZU, Tomoya ICHIKAWA, Takashi SHIMIZU, Kazuna TAGUCHI
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Patent number: 9964922Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: GrantFiled: March 29, 2017Date of Patent: May 8, 2018Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita Shimizu, Tomoya Ichikawa, Takashi Shimizu, Kazuna Taguchi
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Publication number: 20180017928Abstract: A developer cartridge attachable to a drum cartridge including a photosensitive drum is provided. The developer cartridge includes a casing configured to store toner therein, a developer roller rotatable about a first axis extending in an axial direction, and a developer electrode electrically connectable with the developer roller. The developer electrode is configured to be in contact with a first electrode of an image forming apparatus along the axial direction. In a state where the developer cartridge is attached to the drum cartridge, a portion of the developer electrode faces a surface of a lateral wall of the drum cartridge on an opposite side to a surface facing the casing.Type: ApplicationFiled: March 27, 2017Publication date: January 18, 2018Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tomoya ICHIKAWA, Takashi SHIMIZU
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Publication number: 20180017893Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.Type: ApplicationFiled: March 29, 2017Publication date: January 18, 2018Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Keita SHIMIZU, Tomoya ICHIKAWA, Takashi SHIMIZU, Kazuna TAGUCHI
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Patent number: D849131Type: GrantFiled: July 11, 2017Date of Patent: May 21, 2019Assignee: BROTHER INDUSTRIES, LTD.Inventors: Takashi Shimizu, Naoya Kamimura, Koji Abe, Hideshi Nishiyama, Keita Shimizu, Shinya Kusuda, Atsushi Fukaya, Tomoya Ichikawa