Patents by Inventor Yasuyuki Tsutsumi
Yasuyuki Tsutsumi 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: 9285711Abstract: A developing device includes a developer container including a first chamber and a second chamber arranged along a lateral direction, which crosses a gravitational direction, developer circulating through the first chamber and the second chamber; a transporting member rotatably disposed in the first chamber; and a supply member rotatably disposed in the second chamber. A lower end position of the supply member and a lower end position of the transporting member in the gravitational direction are at the same level. While the supply member and the transporting member are rotating, an upper surface of developer contained in the first chamber and an upper surface of developer contained in the second chamber are at levels not higher than an upper end position of the transporting member but not lower than an upper end position of the supply member in the gravitational direction.Type: GrantFiled: August 20, 2013Date of Patent: March 15, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Yasuyuki Tsutsumi, Yoshinobu Kariya
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Patent number: 9164418Abstract: There is provided a developing device including a toner holding member that is rotatably provided to face an image holding member and holds and transports a nonmagnetic single-component toner toward a development region to develop an electrostatic latent image on the image holding member, a supplying member that is rotatably provided in elastic contact with the toner holding member to supply the toner from a contact region therebetween to the toner holding member, a toner replenishing unit that faces a replenishment region at a portion apart from the contact region to replenish a new toner, and a regulating member that is provided on a downstream side of the contact region in a rotation direction thereof and on an upstream side of the development region to triboelectrically charge the toner held on the toner holding member and regulate the amount of toner provided for the development.Type: GrantFiled: May 1, 2013Date of Patent: October 20, 2015Assignee: FUJI XEROX CO., LTD.Inventors: Masaru Sakuma, Munenobu Okubo, Shinji Mitsui, Yasuyuki Tsutsumi, Kazuaki Iikura, Yosuke Ninomiya, Yoshifumi Ozaki, Akihiko Noda, Hirokazu Hamano, Takafumi Wakai
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Patent number: 9128413Abstract: A developing device includes a toner holding member that is rotatably installed opposite to an image holding member which holds a latent image and circularly moves, a supply member that has a rough surface capable of capturing toner, a toner supply portion that supplies new toner, and a restriction member that restricts an amount of toner used for development, wherein the toner supply portion connects an accommodation chamber to a developing chamber via a toner transport path, wherein a developing chamber side opening is located on a lower side of an accommodation chamber side opening of the toner transport path, and wherein a width size in a direction following a rotation direction of the supply member in the developing chamber side opening of the toner transport path is set to be smaller than an outer diameter of the supply member in a projection plane viewed from the supply member side.Type: GrantFiled: May 7, 2013Date of Patent: September 8, 2015Assignee: FUJI XEROX CO., LTD.Inventors: Shinji Mitsui, Munenobu Okubo, Yasuyuki Tsutsumi, Kazuaki Iikura, Yosuke Ninomiya, Yoshifumi Ozaki, Akihiko Noda, Hirokazu Hamano, Takafumi Wakai, Masaru Sakuma
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Patent number: 9063466Abstract: A developing device includes a transporting unit that rotates while facing an image carrier that carries an electrostatic latent image, the transporting unit transporting developer toward the image carrier; a feeding unit that contacts the transporting unit to feed the developer to the transporting unit; a transport path that connects a containing chamber that contains the developer to a feeding chamber that houses the feeding unit; a supplying unit that retains the developer to be supplied in the transport path and supplies the developer to the feeding unit in a supply region that is separated from a contact region in which the feeding unit contacts the transporting unit; and an attaching unit that is disposed downstream of the contact region and upstream of the supply region in a rotation direction of the feeding unit and that attaches the developer to the feeding unit at a location below the contact region.Type: GrantFiled: April 18, 2013Date of Patent: June 23, 2015Assignee: FUJI XEROX CO., LTD.Inventors: Munenobu Okubo, Yasuyuki Tsutsumi, Shinji Mitsui, Kazuaki Iikura, Yosuke Ninomiya, Yoshifumi Ozaki, Akihiko Noda, Hirokazu Hamano, Takafumi Wakai, Masaru Sakuma
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Patent number: 9002244Abstract: A developing device including a toner holding member that faces but is not in contact with an image carrier carrying a latent image and that rotates while holding a nonmagnetic toner, a charging member that charges the toner, and a developing electric field forming unit that forms a developing electric field at least including a direct current component to cause the charged toner to fly and adhere to the latent image to develop the latent image. When the developing electric field is applied such that the toner is caused to fly toward the image carrier by the direct current component of the developing electric field, maintaining a non-electrostatic adhesion of the toner to the toner holding member to be about 2 nN or more under a low-temperature low-humidity environment of a temperature of 10° C. and a relative humidity of 15%. The toner holding member's surface has a specific surface roughness specified by a specific oil retention volume.Type: GrantFiled: January 18, 2013Date of Patent: April 7, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshifumi Ozaki, Shinji Mitsui, Akihiko Noda, Masahiro Andoh, Hisashi Murase, Takafumi Wakai, Munenobu Okubo, Masaru Sakuma, Yasuyuki Tsutsumi, Hirokazu Hamano, Kazuaki Iikura, Yosuke Ninomiya
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Publication number: 20140286676Abstract: A developing device includes a developer container including a first chamber and a second chamber arranged along a lateral direction, which crosses a gravitational direction, developer circulating through the first chamber and the second chamber; a transporting member rotatably disposed in the first chamber; and a supply member rotatably disposed in the second chamber. A lower end position of the supply member and a lower end position of the transporting member in the gravitational direction are at the same level. While the supply member and the transporting member are rotating, an upper surface of developer contained in the first chamber and an upper surface of developer contained in the second chamber are at levels not higher than an upper end position of the transporting member but not lower than an upper end position of the supply member in the gravitational direction.Type: ApplicationFiled: August 20, 2013Publication date: September 25, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yasuyuki TSUTSUMI, Yoshinobu KARIYA
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Publication number: 20140147142Abstract: There is provided a developing device including a toner holding member that is rotatably provided to face an image holding member and holds and transports a nonmagnetic single-component toner toward a development region to develop an electrostatic latent image on the image holding member, a supplying member that is rotatably provided in elastic contact with the toner holding member to supply the toner from a contact region therebetween to the toner holding member, a toner replenishing unit that faces a replenishment region at a portion apart from the contact region to replenish a new toner, and a regulating member that is provided on a downstream side of the contact region in a rotation direction thereof and on an upstream side of the development region to triboelectrically charge the toner held on the toner holding member and regulate the amount of toner provided for the development.Type: ApplicationFiled: May 1, 2013Publication date: May 29, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Masaru SAKUMA, Munenobu OKUBO, Shinji MITSUI, Yasuyuki TSUTSUMI, Kazuaki IIKURA, Yosuke NINOMIYA, Yoshifumi OZAKI, Akihiko NODA, Hirokazu HAMANO, Takafumi WAKAI
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Publication number: 20140147141Abstract: A developing device includes a transporting unit that rotates while facing an image carrier that carries an electrostatic latent image, the transporting unit transporting developer toward the image carrier; a feeding unit that contacts the transporting unit to feed the developer to the transporting unit; a transport path that connects a containing chamber that contains the developer to a feeding chamber that houses the feeding unit; a supplying unit that retains the developer to be supplied in the transport path and supplies the developer to the feeding unit in a supply region that is separated from a contact region in which the feeding unit contacts the transporting unit; and an attaching unit that is disposed downstream of the contact region and upstream of the supply region in a rotation direction of the feeding unit and that attaches the developer to the feeding unit at a location below the contact region.Type: ApplicationFiled: April 18, 2013Publication date: May 29, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Munenobu OKUBO, Yasuyuki TSUTSUMI, Shinji MITSUI, Kazuaki IIKURA, Yosuke NINOMIYA, Yoshifumi OZAKI, Akihiko NODA, Hirokazu HAMANO, Takafumi WAKAI, Masaru SAKUMA
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Publication number: 20140147144Abstract: A developing device includes a toner holding member that is rotatably installed opposite to an image holding member which holds a latent image and circularly moves, a supply member that has a rough surface capable of capturing toner, a toner supply portion that supplies new toner, and a restriction member that restricts an amount of toner used for development, wherein the toner supply portion connects an accommodation chamber to a developing chamber via a toner transport path, wherein a developing chamber side opening is located on a lower side of an accommodation chamber side opening of the toner transport path, and wherein a width size in a direction following a rotation direction of the supply member in the developing chamber side opening of the toner transport path is set to be smaller than an outer diameter of the supply member in a projection plane viewed from the supply member side.Type: ApplicationFiled: May 7, 2013Publication date: May 29, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Shinji MITSUI, Munenobu OKUBO, Yasuyuki TSUTSUMI, Kazuaki IIKURA, Yosuke NINOMIYA, Yoshifumi OZAKI, Akihiko NODA, Hirokazu HAMANO, Takafumi WAKAI, Masaru SAKUMA
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Patent number: 8688018Abstract: A developing device includes a container, a toner holding member, a developing electric field forming unit, a layer forming unit, an electrode member, and a low-frequency electric field forming unit. The container accommodates toner. The toner holding member holds toner and transports the toner to a developing region where the toner holding member and the latent image holding member face. The developing electric field forming unit forms a developing electric field for developing a latent image held on a latent image holding member. The layer forming unit forms a toner layer on the toner holding member prior to the developing region. The electrode member faces the toner holding member. The low-frequency electric field forming unit forms a low-frequency electric field acting on residual toner between the electrode member and the toner holding member, and forms stripe-shaped projections in accordance with a period of the low-frequency electric field.Type: GrantFiled: February 22, 2012Date of Patent: April 1, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Tsutomu Uezono, Takafumi Wakai, Yasuyuki Tsutsumi
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Publication number: 20140056623Abstract: A development method is used for a developing device including a toner holding member that faces but is not in contact with an image carrier carrying a latent image and that rotates while holding a nonmagnetic toner, a charging member that charges the toner, and a developing electric field forming unit that forms a developing electric field at least including a direct current component to cause the charged toner to fly and adhere to the latent image to develop the latent image. The method includes, when the developing electric field is applied such that the toner is caused to fly toward the image carrier by the direct current component of the developing electric field alone, maintaining a non-electrostatic adhesion of the toner to the toner holding member to be about 2 nN or more under a low-temperature low-humidity environment of a temperature of 10° C. and a relative humidity of 15%.Type: ApplicationFiled: January 18, 2013Publication date: February 27, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yoshifumi OZAKI, Shinji MITSUI, Akihiko NODA, Masahiro ANDOH, Hisashi MURASE, Takafumi WAKAI, Munenobu OKUBO, Masaru SAKUMA, Yasuyuki TSUTSUMI, Hirokazu HAMANO, Kazuaki IIKURA, Yosuke NINOMIYA
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Publication number: 20130051869Abstract: A developing device includes a container, a toner holding member, a developing electric field forming unit, a layer forming unit, an electrode member, and a low-frequency electric field forming unit. The container accommodates toner. The toner holding member holds toner and transports the toner to a developing region where the toner holding member and the latent image holding member face. The developing electric field forming unit forms a developing electric field for developing a latent image held on a latent image holding member. The layer forming unit forms a toner layer on the toner holding member prior to the developing region. The electrode member faces the toner holding member. The low-frequency electric field forming unit forms a low-frequency electric field acting on residual toner between the electrode member and the toner holding member, and forms stripe-shaped projections in accordance with a period of the low-frequency electric field.Type: ApplicationFiled: February 22, 2012Publication date: February 28, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Tsutomu UEZONO, Takafumi WAKAI, Yasuyuki TSUTSUMI
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Patent number: 6785494Abstract: An image formation apparatus including a photoreceptor, a charger having a charger member for charging the photoreceptor, a latent image write unit for writing an electrostatic latent image onto the photoreceptor charged by the charger, and a developing device having a developer support with a magnetic field production member, for rendering visible the electrostatic latent image written by the latent image write unit with a developer. Further, the charging member of the charger is disposed under effect of a magnetic field produced by the magnetic field production member of the developing device, and the charging member is made of a nonmagnetic material.Type: GrantFiled: January 28, 2002Date of Patent: August 31, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuya Yamanoi, Shigeo Ohno, Shigeki Nishimura, Yasuyuki Tsutsumi, Ryuichi Yamamoto, Yusuke Kitagawa, Noritaka Ide, Tadashi Kiyama, Masahiro Satoh, Toshio Masubuchi, Hiromitsu Koizumi
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Patent number: 6674987Abstract: An image forming apparatus includes an intermediate transfer member to which a toner image is transferred, a transfer roll for transferring the toner image from the intermediate transfer member onto a recording sheet, a brush roll for removing the residual toner from the intermediate transfer member, and a toner collecting device for collecting the toner attached to the surface of the transfer roll. In the apparatus, an axial length of the intermediate transfer member is longer than that of the brush roll, and the axial length of each of the transfer roll and the toner collecting device is longer than that of the intermediate transfer member.Type: GrantFiled: June 7, 2002Date of Patent: January 6, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Shigeki Nishimura, Yasuyuki Tsutsumi
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Patent number: 6594457Abstract: A cleaning unit having a brush roll with a myriad of slidingly scrubbing bristles upright relative to a rotation shaft for slidingly scrubbing the surface of a rotation body with the brush roll for removing toner deposited on the rotation body. When the brush roll is out of contact with the rotation body, the tips of the slidingly scrubbing bristles are inclined in the circumferential direction and when the brush roll is placed in contact with the rotation body, the brush roll does not rotate by itself and is rotated with rotation of the rotation body. The linear speed of the brush roll at the contact position is made different from that of the rotation body.Type: GrantFiled: April 1, 2002Date of Patent: July 15, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuyuki Tsutsumi, Shigeki Nishimura
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Patent number: 6589700Abstract: In an image recording apparatus, the surface of an image carrier is formed of a material having a high affinity to particulates the particle size of which is smaller than toner and the surfaces of which have been treated to be hydrophobic, so that a layer of the particulates treated to be hydrophobic is retained on the surface of the image carrier.Type: GrantFiled: September 14, 2001Date of Patent: July 8, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuyuki Tsutsumi, Shigeki Nishimura, Kazuya Yamanoi, Tadashi Kiyama, Kazuo Maruyama
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Publication number: 20030012584Abstract: A charging member 2a of a charger 2 is disposed under the effect of a magnetic field produced by a magnetic field production member 4b of a developing device 4 and is made of a nonmagnetic material. The charger 2 comprises the charging member 2a and a removal member 2b disposed in contact with an photoreceptor 1 in the upstream of the charging member 2a, the removal member 2b for removing a deposit on the photoreceptor 1 and the charging member 2a is disposed under the effect of a magnetic field produced by the magnetic field production member 4b of the developing device 4 and is made of a nonmagnetic material. On the other hand, the removal member 2b is disposed under the effect of a magnetic field produced by the magnetic field production member 4b of the developing device 4 and is made of a magnetic material.Type: ApplicationFiled: January 28, 2002Publication date: January 16, 2003Applicant: FUJI XEROX CO., LTD.Inventors: Kazuya Yamanoi, Shigeo Ohno, Shigeki Nishimura, Yasuyuki Tsutsumi, Ryuichi Yamamoto, Yusuke Kitagawa, Noritaka Ide, Tadashi Kiyama, Masahiro Satoh, Toshio Masubuchi, Hiromitsu Koizumi
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Publication number: 20020186989Abstract: An image forming apparatus includes an intermediate transfer member to which a toner image is transferred, a transfer roll for transferring the toner image from the intermediate transfer member onto a recording sheet, a brush roll for removing the residual toner from the intermediate transfer member, and a toner collecting device for collecting the toner attached to the surface of the transfer roll. In the apparatus, an axial length of the intermediate transfer member is longer than that of the brush roll, and the axial length of each of the transfer roll and the toner collecting device is longer than that of the intermediate transfer member.Type: ApplicationFiled: June 7, 2002Publication date: December 12, 2002Applicant: FUJI XEROX CO., LTD.Inventors: Shigeki Nishimura, Yasuyuki Tsutsumi
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Publication number: 20020146260Abstract: A cleaning unit having a brush roll with a myriad of slidingly scrubbing bristles upright relative to a rotation shaft for slidingly scrubbing the surface of a rotation body with the brush roll for removing toner deposited on the rotation body. When the brush roll is out of contact with the rotation body, the tips of the slidingly scrubbing bristles are inclined in the circumferential direction and when the brush roll is placed in contact with the rotation body, the brush roll does not rotate by itself and is rotated with rotation of the rotation body. The linear speed of the brush roll at the contact position is made different from that of the rotation body.Type: ApplicationFiled: April 1, 2002Publication date: October 10, 2002Applicant: FUJI XEROX CO., LTD.Inventors: Yasuyuki Tsutsumi, Shigeki Nishimura
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Patent number: D518851Type: GrantFiled: February 15, 2005Date of Patent: April 11, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Toyohiko Awano, Naomasa Okimura, Shigeki Nishimura, Yasuyuki Tsutsumi