Patents by Inventor Hideki Maeshima
Hideki Maeshima 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: 20230273570Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: ApplicationFiled: May 8, 2023Publication date: August 31, 2023Inventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 11687029Abstract: [TASK] An object of the present invention is to provide an image developing apparatus and a process cartridge with which an image quality can be improved while reducing a number of parts and reducing an amount of remaining developer. [SOLUTION] A process cartridge detachably mountable to an electrophotographic image forming operators includes a developing chamber including a developing roller and a developer supplying roller; a developer accommodating container accommodating the developer provided below the developing chamber with respect to gravity direction, wherein the developer is fed into the developing chamber while being stirred by a feeding member. The developer supplying roller rotates such that a surface thereof moves in the same direction as a surface of the developing roller at a position where the developer supplying roller contacts the developing roller. A surface speed of the developer supplying roller is higher than a surface speed of the developing roller.Type: GrantFiled: November 11, 2021Date of Patent: June 27, 2023Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 11392079Abstract: A process cartridge includes a photosensitive drum and a first casing rotatably supporting the photosensitive drum. The process cartridge also includes a developing roller configured to develop an electrostatic latent image formed on the photosensitive drum with toner, a supplying roller configured to supply the developing roller with the toner, and a second casing rotatably supporting the developing roller and the supplying roller and containing the toner. A rotatable coupling is provided with a projection and operatively connected to the supplying roller and the developing roller so that the coupling can transmit a rotational force to the supplying roller and the developing roller, and at least a part of the coupling being movable in a direction perpendicular to a rotational axis of the coupling.Type: GrantFiled: December 21, 2020Date of Patent: July 19, 2022Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Patent number: 11320782Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: GrantFiled: September 28, 2020Date of Patent: May 3, 2022Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 11314201Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: GrantFiled: September 28, 2020Date of Patent: April 26, 2022Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Publication number: 20220066386Abstract: An object of the present invention is to provide an image developing apparatus and a process cartridge with which an image quality can be improved while reducing a number of parts and reducing an amount of remaining developer. [SOLUTION] A process cartridge detachably mountable to an electrophotographic image forming operators includes a developing chamber including a developing roller and a developer supplying roller; a developer accommodating container accommodating the developer provided below the developing chamber with respect to gravity direction, wherein the developer is fed into the developing chamber while being stirred by a feeding member. The developer supplying roller rotates such that a surface thereof moves in the same direction as a surface of the developing roller at a position where the developer supplying roller contacts the developing roller. A surface speed of the developer supplying roller is higher than a surface speed of the developing roller.Type: ApplicationFiled: November 11, 2021Publication date: March 3, 2022Inventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 11226585Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: GrantFiled: September 28, 2020Date of Patent: January 18, 2022Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 11073787Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.Type: GrantFiled: June 5, 2020Date of Patent: July 27, 2021Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Publication number: 20210109478Abstract: A process cartridge includes a photosensitive drum and a first casing rotatably supporting the photosensitive drum. The process cartridge also includes a developing roller configured to develop an electrostatic latent image formed on the photosensitive drum with toner, a supplying roller configured to supply the developing roller with the toner, and a second casing rotatably supporting the developing roller and the supplying roller and containing the toner. A rotatable coupling is provided with a projection and operatively connected to the supplying roller and the developing roller so that the coupling can transmit a rotational force to the supplying roller and the developing roller, and at least a part of the coupling being movable in a direction perpendicular to a rotational axis of the coupling.Type: ApplicationFiled: December 21, 2020Publication date: April 15, 2021Inventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Patent number: 10948868Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.Type: GrantFiled: June 5, 2020Date of Patent: March 16, 2021Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Publication number: 20210011428Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: ApplicationFiled: September 28, 2020Publication date: January 14, 2021Inventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuki, Yoshihiro Mitsui
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Publication number: 20210011429Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: ApplicationFiled: September 28, 2020Publication date: January 14, 2021Inventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 10838356Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: GrantFiled: November 26, 2019Date of Patent: November 17, 2020Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuki, Yoshihiro Mitsui
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Publication number: 20200301354Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.Type: ApplicationFiled: June 5, 2020Publication date: September 24, 2020Inventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Patent number: 10712707Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.Type: GrantFiled: December 19, 2018Date of Patent: July 14, 2020Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Patent number: 10698361Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.Type: GrantFiled: February 28, 2018Date of Patent: June 30, 2020Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
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Patent number: 10691063Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: GrantFiled: April 24, 2018Date of Patent: June 23, 2020Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuku, Yoshihiro Mitsui
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Patent number: 10670986Abstract: At ends of a frame in an axial direction of a developing roller, a first end portion member and a second end portion member are provided so as to be rotatable around a rotation axis parallel to the axial direction, and at least one of them has one side in a direction orthogonal to the rotation axis on which a force receiving portion is provided, and another side in the direction orthogonal to the rotation axis on which a regulating portion is provided. The force receiving portion receives a biasing force in a mounting direction of the developing apparatus to the apparatus main body from a biasing member. The regulating portion is brought into contact with the apparatus main body to regulate movement of the other side relative to the apparatus main body in a direction opposite to the mounting direction, with a fulcrum being the rotation axis.Type: GrantFiled: September 24, 2018Date of Patent: June 2, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shuichi Gofuku, Hideki Maeshima, Soichi Ishii
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Publication number: 20200096937Abstract: A process cartridge includes a photosensitive drum; a developing roller; a developer supplying roller, provided in contact with the developing roller; a driving force receiving portion provided at a shaft end of the supplying roller; a first driving force transmitting portion; a second driving force transmitting portion; flexible sheets provided adjacent to an engaging portion between the first portion and the second portion to intermittently contact the second portion with rotation of the second portion, wherein a rotational direction of the roller is opposite to that of the roller, and a peripheral speed of the roller is larger than that of the roller.Type: ApplicationFiled: November 26, 2019Publication date: March 26, 2020Inventors: Hideki Maeshima, Kuniaki Hirukawa, Shuichi Gofuki, Yoshihiro Mitsui
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Patent number: 10545427Abstract: At ends of a frame in an axial direction of a developing roller, a first end portion member and a second end portion member are provided so as to be rotatable around a rotation axis parallel to the axial direction, and at least one of them has one side in a direction orthogonal to the rotation axis on which a force receiving portion is provided, and another side in the direction orthogonal to the rotation axis on which a regulating portion is provided. The force receiving portion receives a biasing force in a mounting direction of the developing apparatus to the apparatus main body from a biasing member. The regulating portion is brought into contact with the apparatus main body to regulate movement of the other side relative to the apparatus main body in a direction opposite to the mounting direction, with a fulcrum being the rotation axis.Type: GrantFiled: September 24, 2018Date of Patent: January 28, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shuichi Gofuku, Hideki Maeshima, Soichi Ishii