Patents by Inventor Kazuki KURAMOTO
Kazuki KURAMOTO 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: 20220100141Abstract: An image forming apparatus includes: an image bearing member that has a toner image formed thereon while rotating and that retains the toner image until the toner image is transferred; a charging unit that receives an image-formation charge voltage having a predetermined first polarity and used for electrostatically charging the image bearing member; an exposure unit that radiates exposure light onto a region of the image bearing member so as to form an electrostatic latent image on the image bearing member, the region of the image bearing member receiving the image-formation charge voltage applied by the charging unit; a developing unit that uses a toner to develop the electrostatic latent image formed on the image bearing member by the exposure unit; a transfer unit that nips a transfer member by working together with the image bearing member and that receives a transfer voltage having a second polarity opposite to the first polarity between the transfer unit and the image bearing member so as to transfer tType: ApplicationFiled: April 8, 2021Publication date: March 31, 2022Applicant: FUJIFILM Business Innovation Corp.Inventors: Kazuki Kuramoto, Akira Shimodaira
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Patent number: 10908525Abstract: A bearing component for rotatably receiving a rotating shaft on an end of a rotating unit includes a component body, an inner protrusion, and one or more outer protrusions. The component body has a recess into which the rotating shaft is rotatably inserted. The inner protrusion protrudes from a wall portion of the recess facing an end surface of the rotating shaft. The inner protrusion receives an axial load by the rotating shaft. The outer protrusions protrude from an outer surface of the component body opposite to the recess. The one or more outer protrusions are in contact with a holding unit. A contact portion between the outer protrusions and the holding unit is offset from a contact portion position between the inner protrusion and the end surface. The contact portion between at least one of the outer protrusions and the holding unit has a non-planar shape.Type: GrantFiled: December 20, 2019Date of Patent: February 2, 2021Assignee: FUJI XEROX CO.. LTD.Inventors: Kazuki Kuramoto, Keiichiro Sato, Shuhei Yamazaki, Hirofumi Hamada, Toru Morioka
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Publication number: 20200319572Abstract: A bearing component for rotatably receiving a rotating shaft on an end of a rotating unit includes a component body, an inner protrusion, and one or more outer protrusions. The component body has a recess into which the rotating shaft is rotatably inserted. The inner protrusion protrudes from a wall portion of the recess facing an end surface of the rotating shaft. The inner protrusion receives an axial load by the rotating shaft. The outer protrusions protrude from an outer surface of the component body opposite to the recess. The one or more outer protrusions are in contact with a holding unit. A contact portion between the outer protrusions and the holding unit is offset from a contact portion position between the inner protrusion and the end surface. The contact portion between at least one of the outer protrusions and the holding unit has a non-planar shape.Type: ApplicationFiled: December 20, 2019Publication date: October 8, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Kazuki KURAMOTO, Keiichiro Sato, Shuhei Yamazaki, Hirofumi Hamada, Toru Morioka
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Patent number: 10564581Abstract: An image forming apparatus includes a photoreceptor, a charging unit, an exposure unit, a developing unit, a transfer unit, a detector, and a controller. The charging unit charges the photoreceptor. The exposure unit exposes the photoreceptor charged by the charging unit to light and forms an electrostatic latent image on the photoreceptor. The developing unit develops the electrostatic latent image that has been exposed by the exposure unit and formed on the photoreceptor. The transfer unit transfers an image obtained by development by the developing unit to a transfer object. The detector detects strip developer, which is a strip-shaped developer image formed on the transfer object.Type: GrantFiled: February 27, 2019Date of Patent: February 18, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Kazuki Kuramoto, Yasuhiro Funayama, Hirofumi Hamada
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Patent number: 10496001Abstract: A transfer device includes a transfer member that transfers a visible image on an image bearing member onto a medium. When an image forming rate is low, a total amount of transfer current to be supplied to a transfer region where the image bearing member and the transfer member face each other is increased, as compared with when the image forming rate is high.Type: GrantFiled: October 23, 2017Date of Patent: December 3, 2019Assignee: FUJI XEROX CO., LTD.Inventor: Kazuki Kuramoto
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Patent number: 10365577Abstract: An image forming apparatus includes an image bearing member and a charging member that electrostatically charges a surface of the image bearing member. Control is performed for increasing a voltage to be applied to the charging member in a stepwise manner so that the voltage becomes higher than when the image bearing member passes through a region where the image bearing member faces the charging member in a previous rotation, the control being performed as the image bearing member rotates while a single image region worth of image is being formed in an image region that is longer than a length equivalent to one rotation of the image bearing member in a rotational direction of the image bearing member.Type: GrantFiled: October 30, 2017Date of Patent: July 30, 2019Assignee: FUJI XEROX CO., LTD.Inventor: Kazuki Kuramoto
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Publication number: 20180284637Abstract: An image forming apparatus includes an image bearing member and a charging member that electrostatically charges a surface of the image bearing member. Control is performed for increasing a voltage to be applied to the charging member in a stepwise manner so that the voltage becomes higher than when the image bearing member passes through a region where the image bearing member faces the charging member in a previous rotation, the control being performed as the image bearing member rotates while a single image region worth of image is being formed in an image region that is longer than a length equivalent to one rotation of the image bearing member in a rotational direction of the image bearing member.Type: ApplicationFiled: October 30, 2017Publication date: October 4, 2018Applicant: FUJI XEROX CO., LTD.Inventor: Kazuki KURAMOTO
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Publication number: 20180284636Abstract: A transfer device includes a transfer member that transfers a visible image on an image bearing member onto a medium. When an image forming rate is low, a total amount of transfer current to be supplied to a transfer region where the image bearing member and the transfer member face each other is increased, as compared with when the image forming rate is high.Type: ApplicationFiled: October 23, 2017Publication date: October 4, 2018Applicant: FUJI XEROX CO., LTD.Inventor: Kazuki KURAMOTO