Patents by Inventor Hisashi Yamauchi
Hisashi Yamauchi 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: 11635705Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: GrantFiled: April 8, 2022Date of Patent: April 25, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Bunro Noguchi, Hisashi Yamauchi
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Publication number: 20220229380Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: ApplicationFiled: April 8, 2022Publication date: July 21, 2022Inventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 11327415Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: GrantFiled: September 16, 2020Date of Patent: May 10, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 11073781Abstract: An image forming apparatus that executes an image forming operation for forming a toner image on a recording material and an application operation of applying a metal soap to a surface of an image bearing member by supplying a toner stored in a toner storing unit to the surface of the image bearing member from the developing member. A surficial moving speed of the image bearing member during the application operation is lower than the surficial moving speed of the image bearing member during the image forming operation, and a speed difference between the surficial moving speed of the developing member and the surficial moving speed of the image bearing member during the application operation is larger than that during the image forming operation.Type: GrantFiled: June 18, 2020Date of Patent: July 27, 2021Assignee: Canon Kabushiki KaishaInventors: Kosuke Ikada, Go Shindo, Keitaro Nakata, Hisashi Yamauchi, Shinichi Agata, Yoshihiro Mitsui, Masahito Kato, Yuichiro Hirata
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Publication number: 20200409287Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: ApplicationFiled: September 16, 2020Publication date: December 31, 2020Inventors: Bunro Noguchi, Hisashi Yamauchi
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Publication number: 20200409297Abstract: An image forming apparatus that executes an image forming operation for forming a toner image on a recording material and an application operation of applying a metal soap to a surface of an image bearing member by supplying a toner stored in a toner storing unit to the surface of the image bearing member from the developing member. A surficial moving speed of the image bearing member during the application operation is lower than the surficial moving speed of the image bearing member during the image forming operation, and a speed difference between the surficial moving speed of the developing member and the surficial moving speed of the image bearing member during the application operation is larger than that during the image forming operation.Type: ApplicationFiled: June 18, 2020Publication date: December 31, 2020Inventors: Kosuke Ikada, Go Shindo, Keitaro Nakata, Hisashi Yamauchi, Shinichi Agata, Yoshihiro Mitsui, Masahito Kato, Yuichiro Hirata
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Patent number: 10802418Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: GrantFiled: September 5, 2019Date of Patent: October 13, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 10754265Abstract: An image forming apparatus including: an image bearing member; a developing member to supply a developer to the image bearing member; and a cleaning member to clean a peripheral surface of the image bearing member in contact with the peripheral surface, wherein a plurality of grooves extend in a circumferential direction on the peripheral surface, and have a width in a generatrix direction of the peripheral surface within a range of at least 0.5 ?m and not more than 40 ?m, and are formed to be side by side in the generatrix direction; the number of the grooves is at least 20 and not more than 1000 per a width of 1000 ?m in the generatrix direction of the peripheral surface; and an average depth (Rvk) of a valley of a projection under a core section of a roughness curve of the peripheral surface is 0.08 ?m or less.Type: GrantFiled: November 11, 2019Date of Patent: August 25, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Hisashi Yamauchi, Keitaro Nakata, Yasukazu Ikami, Kosuke Ikada, Kentaro Yamawaki
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Publication number: 20200150578Abstract: An image forming apparatus including: an image bearing member; a developing member to supply a developer to the image bearing member; and a cleaning member to clean a peripheral surface of the image bearing member in contact with the peripheral surface, wherein a plurality of grooves extend in a circumferential direction on the peripheral surface, and have a width in a generatrix direction of the peripheral surface within a range of at least 0.5 ?m and not more than 40 ?m, and are formed to be side by side in the generatrix direction; the number of the grooves is at least 20 and not more than 1000 per a width of 1000 ?m in the generatrix direction of the peripheral surface; and an average depth (Rvk) of a valley of a projection under a core section of a roughness curve of the peripheral surface is 0.08 ?m or less.Type: ApplicationFiled: November 11, 2019Publication date: May 14, 2020Inventors: Hisashi Yamauchi, Keitaro Nakata, Yasukazu Ikami, Kosuke Ikada, Kentaro Yamawaki
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Publication number: 20200009606Abstract: A surface decoration structure includes an undercoat film, a silver mirror film layer, and a topcoat film formed on a surface of a substrate. The silver mirror film layer includes a film of stacked nanometer-sized silver particles having surfaces coated with a polymer dispersing agent, and the topcoat film includes, as a solvent, at least one member selected from the group consisting of an aliphatic hydrocarbon compound, an aliphatic hydrocarbon compound solution including 10% by mass or less of an aromatic compound, and diisobutyl ketone. The undercoat film and/or the topcoat film may include a corrosion inhibitor. The silver mirror film layer may further include a corrosion inhibitor. The surface decoration structure includes the silver mirror film layer with improved luster and corrosion resistance.Type: ApplicationFiled: November 24, 2017Publication date: January 9, 2020Inventors: Yasushi NISHIMURA, Akio NAGAI, Hisashi YAMAUCHI, Kazumi YASUDA, Hiroyuki ARIMOTO, Mai OOE
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Patent number: 10520852Abstract: An image forming apparatus includes an image bearing member on which an electrostatic latent image is formable, and a developing device including a developer carrying member, a container, and a supply roller. When the developing device including the developer carrying member, to which a lubricant different from the developer is applied, is used for the first time, a first initial operation of transferring the lubricant from the developer carrying member to the image bearing member together with the developer is performed. The image forming apparatus further includes a storage unit configured to store a suspension state when suspension is detected before the initial operation completes, and a controller configured to execute a second initial operation as an operation of resuming the suspended first initial operation on the basis of the stored suspension state.Type: GrantFiled: September 13, 2018Date of Patent: December 31, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Masataka Mochizuki, Hisashi Yamauchi, Norihito Naito
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Publication number: 20190391509Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: ApplicationFiled: September 5, 2019Publication date: December 26, 2019Inventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 10466634Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member configured to contact with the image bearing member and to be separated from the image bearing member; a control unit for controlling the image bearing member and the developer carrying member; and a contact member disposed in contact with the image bearing member. The control unit is configured to sequentially execute: (1) rotating the image bearing member at a first speed in a separated state; (2) switching the image bearing member and the developer carrying member from the separated state to a contact state in a state in which the image bearing member rotates at the first speed; and (3) rotating the image bearing member by decreasing a rotation speed of the image bearing member from the first speed to a second speed smaller than the first speed in the contact state.Type: GrantFiled: September 25, 2018Date of Patent: November 5, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Hisashi Yamauchi, Masataka Mochizuki, Norihito Naito
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Patent number: 10444658Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: GrantFiled: March 9, 2018Date of Patent: October 15, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Bunro Noguchi, Hisashi Yamauchi
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Publication number: 20190101844Abstract: An image forming apparatus includes: an image bearing member on which an electrostatic latent image is formable; and a developing device including a developer carrying member, a container, and a supply roller, wherein when the developing device including the developer carrying member, to which a lubricant different from the developer is applied, is used for the first time, a first initial operation of transferring the lubricant from the developer carrying member to the image bearing member together with the developer is performed, and wherein the image forming apparatus further includes: a storage unit configured to store a suspension state when suspension is detected before the initial operation completes; and a controller configured to execute a second initial operation as an operation of resuming the suspended first initial operation on the basis of the stored suspension state.Type: ApplicationFiled: September 13, 2018Publication date: April 4, 2019Inventors: Masataka Mochizuki, Hisashi Yamauchi, Norihito Naito
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Publication number: 20190101855Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member configured to contact with the image bearing member and to be separated from the image bearing member; a control unit for controlling the image bearing member and the developer carrying member; and a contact member disposed in contact with the image bearing member. The control unit is configured to sequentially execute: (1) rotating the image bearing member at a first speed in a separated state; (2) switching the image bearing member and the developer carrying member from the separated state to a contact state in a state in which the image bearing member rotates at the first speed; and (3) rotating the image bearing member by decreasing a rotation speed of the image bearing member from the first speed to a second speed smaller than the first speed in the contact state.Type: ApplicationFiled: September 25, 2018Publication date: April 4, 2019Inventors: Hisashi Yamauchi, Masataka Mochizuki, Norihito Naito
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Publication number: 20180210368Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: ApplicationFiled: March 9, 2018Publication date: July 26, 2018Inventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 9946188Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: GrantFiled: March 14, 2017Date of Patent: April 17, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Bunro Noguchi, Hisashi Yamauchi
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Publication number: 20170277067Abstract: An image forming apparatus is capable of performing a second image forming operation in which a peripheral velocity ratio of a developer bearing member to an image bearing member becomes greater than that in a first image forming operation, and in which a potential difference between a developing bias applied to the developer bearing member and a supply bias applied to a supply member becomes a potential difference at which a urging force causing a developer at the contact portion between the developer bearing member and the supply member to move from the supply member to the developer bearing member becomes smaller than that in the first image forming operation, or becomes a potential difference at which a urging force causing the developer to move from the developer bearing member to the supply member is generated.Type: ApplicationFiled: March 14, 2017Publication date: September 28, 2017Inventors: Bunro Noguchi, Hisashi Yamauchi
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Patent number: 9507314Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member for carrying developer; a cartridge detachably mountable to a main assembly of the image forming apparatus, the cartridge includes a cleaning means for removing the developer remaining on the developer carrying member after a developer image is transferred onto a transfer material, a developer buffering portion for accommodating the developer removed by the cleaning portion, and a feeding member driven for feeding the developer from the developer buffering portion to a developer container provided in the main assembly; a storing portion for storing cartridge operation information; and a controller for controlling the feeding member to stop drive of the feeding member on the basis of the cartridge operation information stored in the storing portion.Type: GrantFiled: September 3, 2015Date of Patent: November 29, 2016Assignee: Canon Kabushiki KaishaInventor: Hisashi Yamauchi