Patents by Inventor Yasuki Kamimori
Yasuki Kamimori 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: 11644788Abstract: An image forming apparatus includes a rotatable photosensitive member, an image forming portion, a cleaning device, and a controller. The cleaning device includes a blade, a rotatable brush, and an applying portion. The controller controls the applying portion so as to apply a bias to the brush so that a potential of the brush has a polarity opposite to a normal charge polarity of toner. When a tensile strength of the brush is A (cn/dtex), a thickness of the brush is B (denier), a bristle density of the brush is C (kF/inch2), a length of the brush is D (mm), and an elastic deformation rate of the surface of the photosensitive member is E (%), the following relationships are satisfied: 48(%)?E?60(%), and 400?{A×B2×C/D2}?20408.Type: GrantFiled: July 14, 2022Date of Patent: May 9, 2023Assignee: Canon Kabushiki KaishaInventor: Yasuki Kamimori
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Publication number: 20230048499Abstract: An image forming apparatus includes a rotatable photosensitive member, an image forming portion, a cleaning device, and a controller. The cleaning device includes a blade, a rotatable brush, and an applying portion. The controller controls the applying portion so as to apply the bias to the brush so that a potential of the brush has a polarity opposite to a normal charge polarity of toner. When a tensile strength of the brush is A (cn/dtex), a thickness of the brush is B (denier), a bristle density of the brush is C (kF/inch2), a length of the brush is D (mm), and an elastic deformation rate of the surface of the photosensitive member is E (%), the following relationships are satisfied: 48(%)?E?60(%), and 400?{A×B2×C/D2}?20408.Type: ApplicationFiled: July 14, 2022Publication date: February 16, 2023Inventor: Yasuki Kamimori
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Patent number: 9933746Abstract: An elastic deformation rate of a photoconductor, an additive amount of inorganic fine particles, and a rotary member are set to satisfy a relation of 0.6?(D/(A×B/C))/(1+E/20)?0.82, where A is a thickness of fibers of a brush, B is a bristle density of the fibers of the brush, C is a length of the fibers of the brush, D is an elastic deformation rate obtained from a hardness test conducted using a Vickers diamond pyramid indenter at a temperature of 23° C. and a humidity of 50%, and E is the additive amount of the inorganic fine particles relative to 100 parts by mass of toner particles.Type: GrantFiled: August 16, 2016Date of Patent: April 3, 2018Assignee: Canon Kabushiki KaishaInventors: Tadashi Fukuda, Yasuki Kamimori
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Patent number: 9927741Abstract: An image forming apparatus includes an intermediary transfer member, a toner image forming unit, a rotatable transfer member, a cleaning unit, a feeding unit, a feeding portion and an executing portion configured to execute a supplying operation for supplying a supplying toner image to a cleaning portion. The executing portion forms the supplying toner image at a position including a position different from a position where an adjusting toner image for adjusting an image forming condition is formed, with respect to a widthwise direction crossing a movement direction of an intermediary transfer member provided in contact with the rotatable transfer member. The executing portion performs the supplying operation at least one time in a double-sided image forming job and does not perform the supplying operation in a single-sided image forming job.Type: GrantFiled: June 28, 2016Date of Patent: March 27, 2018Assignee: Canon Kabushiki KaishaInventors: Akihiro Noguchi, Haruhiko Omata, Tatsuomi Murayama, Yasuki Kamimori
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Patent number: 9910397Abstract: An image forming apparatus includes a rotatable image bearing drum; a toner image transfer device; a cleaning blade for cleaning the drum after transfer of the image; a rotatable furbrush provided downstream of the transfer device and upstream of the blade, the furbrush being rotatable counterdirectionally with respect to a peripheral movement of the drum; an executing portion for executing a first mode for forming an image on the transfer material on the basis of a signal inputted to the apparatus and a second mode for supplying a band of the toner to the blade; and a controller for controlling a peripheral speed difference between the drum and the furbrush, wherein the difference when the band of the toner passes the furbrush in the second mode is smaller than that when the toner on the drum after the image transfer passes the furbrush in the first mode.Type: GrantFiled: June 23, 2016Date of Patent: March 6, 2018Assignee: Canon Kabushiki KaishaInventor: Yasuki Kamimori
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Patent number: 9760041Abstract: An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.Type: GrantFiled: June 28, 2016Date of Patent: September 12, 2017Assignee: Canon Kabushiki KaishaInventors: Haruhiko Omata, Akihiro Noguchi, Tatsuomi Murayama, Yasuki Kamimori
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Publication number: 20170052500Abstract: An elastic deformation rate of a photoconductor, an additive amount of inorganic fine particles, and a rotary member are set to satisfy a relation of 0.6?(D/(A×B/C))/(1+E/20)?0.82, where A is a thickness of fibers of a brush, B is a bristle density of the fibers of the brush, C is a length of the fibers of the brush, D is an elastic deformation rate obtained from a hardness test conducted using a Vickers diamond pyramid indenter at a temperature of 23° C. and a humidity of 50%, and E is the additive amount of the inorganic fine particles relative to 100 parts by mass of toner particles.Type: ApplicationFiled: August 16, 2016Publication date: February 23, 2017Inventors: Tadashi Fukuda, Yasuki Kamimori
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Publication number: 20170003623Abstract: An image forming apparatus includes an intermediary transfer member, a toner image forming unit, a rotatable transfer member, a cleaning unit, a feeding unit, a feeding portion and an executing portion configured to execute a supplying operation for supplying a supplying toner image to a cleaning portion. The executing portion forms the supplying toner image at a position including a position different from a position where an adjusting toner image for adjusting an image forming condition is formed, with respect to a widthwise direction crossing a movement direction of an intermediary transfer member provided in contact with the rotatable transfer member. The executing portion performs the supplying operation at least one time in a double-sided image forming job and does not perform the supplying operation in a single-sided image forming job.Type: ApplicationFiled: June 28, 2016Publication date: January 5, 2017Inventors: Akihiro Noguchi, Haruhiko Omata, Tatsuomi Murayama, Yasuki Kamimori
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Publication number: 20170003624Abstract: An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.Type: ApplicationFiled: June 28, 2016Publication date: January 5, 2017Inventors: Haruhiko Omata, Akihiro Noguchi, Tatsuomi Murayama, Yasuki Kamimori
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Publication number: 20160378053Abstract: An image forming apparatus includes a rotatable image bearing drum; a toner image transfer device; a cleaning blade for cleaning the drum after transfer of the image; a rotatable furbrush provided downstream of the transfer device and upstream of the blade, the furbrush being rotatable counterdirectionally with respect to a peripheral movement of the drum; an executing portion for executing a first mode for forming an image on the transfer material on the basis of a signal inputted to the apparatus and a second mode for supplying a band of the toner to the blade; and a controller for controlling a peripheral speed difference between the drum and the furbrush, wherein the difference when the band of the toner passes the furbrush in the second mode is smaller than that when the toner on the drum after the image transfer passes the furbrush in the first mode.Type: ApplicationFiled: June 23, 2016Publication date: December 29, 2016Inventor: Yasuki Kamimori