Patents by Inventor Nobuyuki Ichizawa
Nobuyuki Ichizawa 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: 9291953Abstract: A transfer member includes a support, an elastic layer, and a resin layer having a sea-island structure on the elastic layer, wherein elongation at break of the resin layer is from 20% to 180%, and an average diameter of an island portion thereof is from 0.5 ?m to 3 ?m.Type: GrantFiled: August 1, 2014Date of Patent: March 22, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Nobuyuki Ichizawa, Masato Ono
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Publication number: 20150205228Abstract: A transfer member includes a support, an elastic layer, and a resin layer having a sea-island structure on the elastic layer, wherein elongation at break of the resin layer is from 20% to 180%, and an average diameter of an island portion thereof is from 0.5 ?m to 3 ?m.Type: ApplicationFiled: August 1, 2014Publication date: July 23, 2015Inventors: Nobuyuki ICHIZAWA, Masato ONO
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Patent number: 8855537Abstract: A transfer roller includes a conductive support, a first conductive elastic layer disposed on the conductive support, and a second conductive elastic layer disposed on the first conductive elastic layer. A common logarithm of surface resistivity of the second conductive elastic layer is higher than a common logarithm of volume resistivity of the second conductive elastic layer by about 1 or more.Type: GrantFiled: August 10, 2012Date of Patent: October 7, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Nobuyuki Ichizawa
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Patent number: 8792813Abstract: A transfer roll includes a cylindrical conductive substrate; an inner elastic layer having an Asker-C hardness of from 5° to 20°; and an outer elastic layer having an Asker-C hardness of from 30° to 45° in this order, wherein the transfer roll satisfies the following Expression (1): ?0(in)>?0(out)??Expression (1): wherein ?0(in) is a volume resistivity of the inner elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state, and ?0(out) is a volume resistivity of the outer elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state.Type: GrantFiled: February 21, 2012Date of Patent: July 29, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Nobuyuki Ichizawa
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Publication number: 20130216280Abstract: A transfer roller includes a conductive support, a first conductive elastic layer disposed on the conductive support, and a second conductive elastic layer disposed on the first conductive elastic layer. A common logarithm of surface resistivity of the second conductive elastic layer is higher than a common logarithm of volume resistivity of the second conductive elastic layer by about 1 or more.Type: ApplicationFiled: August 10, 2012Publication date: August 22, 2013Applicant: FUJI XEROX CO., LTD.Inventor: Nobuyuki Ichizawa
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Patent number: 8503917Abstract: A roller component includes a layer composed of a foamed rubber material including plural cells formed by gas, the layer being formed into a substantially cylindrical body, wherein a volume of the cells decreases from an inner side of the substantially cylindrical body toward the outside.Type: GrantFiled: February 2, 2011Date of Patent: August 6, 2013Assignee: Fuji Xerox Co., LtdInventor: Nobuyuki Ichizawa
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Publication number: 20130196836Abstract: A conductive roller includes a conductive support, a conductive elastic layer disposed on the conductive support, and a conductive resin layer disposed on the conductive elastic layer and containing a resin and a conductor. The conductive resin layer includes a first region forming an outermost surface thereof and a second region between the first region and the conductive elastic layer. The second region adjoins the conductive elastic layer and has a lower surface resistivity than the first region.Type: ApplicationFiled: July 26, 2012Publication date: August 1, 2013Applicant: FUJI XEROX CO., LTD.Inventor: Nobuyuki ICHIZAWA
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Publication number: 20130034373Abstract: A transfer roll includes a cylindrical conductive substrate; an inner elastic layer having an Asker-C hardness of from 5° to 20°; and an outer elastic layer having an Asker-C hardness of from 30° to 45° in this order, wherein the transfer roll satisfies the following Expression (1): ?0(in)>?0(out) ??Expression (1): wherein ?0(in) is a volume resistivity of the inner elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state, and ?0(out) is a volume resistivity of the outer elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state.Type: ApplicationFiled: February 21, 2012Publication date: February 7, 2013Applicant: FUJI XEROX CO., LTD.Inventor: Nobuyuki ICHIZAWA
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Patent number: 8335460Abstract: A tubular body 101 includes a layer containing a resin and conductive particles 112, the layer having a first region 111C that is free of conductive particles and lies at the outermost surface, and a second region 111B that has higher conductivity than other regions and lies closer to the innermost surface than the first region. A coating film of a coating liquid containing the conductive particles and resin material is dried, and then an eluting solvent for eluting the resin material from the film is applied thereto. As a result of this, the conductive particles are localized in the coating film at the side coated with the eluting solvent. Thereafter, upon drying the eluting solvent, the resin material dissolved in the eluting solvent deposits on the region where the conductive particles are localized, whereby a particle-free resin region free of the conductive particles is formed.Type: GrantFiled: September 3, 2009Date of Patent: December 18, 2012Assignee: Fuji Xerox Co., LtdInventors: Nobuyuki Ichizawa, Masato Ono, Tomoko Suzuki
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Patent number: 8229336Abstract: The invention provides an annular body having a resin layer. The resin layer has a resin and particles. The particles are at least one of conductive or magnetic. A surface of the resin layer has a first region and a second region. The first region is different from the second region in at least one of the surface resistivity or the magnetic flux density. The second region has a resin region and a high density region. The resin region is provided at an outer side with respect to the high density region in the thickness direction of the resin layer and is substantially free of the particle. The high density region has a higher content of the particles comparing to the resin region and the first region. The invention further provides a cartridge having the annular body. The invention further provides an image forming apparatus having the annular body.Type: GrantFiled: November 6, 2009Date of Patent: July 24, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Masato Ono, Nobuyuki Ichizawa, Hideaki Kakyo, Yousuke Tsutsumi
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Patent number: 8145106Abstract: The invention provides an annular body provided at an image forming apparatus, the annular body has at least an outermost periphery layer and an innermost periphery layer, each of which comprise carbon black, and a content of carbon black contained per unit of volume of the outermost periphery layer being smaller than a content of carbon black contained per unit of volume of the innermost periphery layer. The invention further provides an annular body stretching device, having at least the annular body and a plurality of annular body stretching units rotatably stretching the annular body at an inner surface of the annular body. The invention further provides an image forming apparatus having at least an image holder, a charging device, an exposing device, a developing device, a first transferring device, a second transferring device, and a fixing device, in which the intermediate transfer belt is the annular body.Type: GrantFiled: September 22, 2008Date of Patent: March 27, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiko Miyamoto, Nobuyuki Ichizawa, Yousuke Tsutsumi, Taku Fukuhara
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Publication number: 20120070202Abstract: A roller component includes a layer composed of a foamed rubber material including plural cells formed by gas, the layer being formed into a substantially cylindrical body, wherein the volume of the cells decreases from the inner side of the substantially cylindrical body toward the outside.Type: ApplicationFiled: February 2, 2011Publication date: March 22, 2012Applicant: FUJI XEROX CO., LTD.Inventor: Nobuyuki ICHIZAWA
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Patent number: 8131195Abstract: The invention provides an annular body having an inner surface including a base material layer, the base material layer having a resin and a conductive agent, and the inner surface comprising a carbonized region. The invention further provides an annular body stretching device having: the annular body; and a stretching unit pushing outward the annular body with tension from an inner circumferential side of the annular body. The invention further provides an image forming apparatus having the annular body as an intermediate transfer body provided thereto. The invention further provides a method for forming the annular body, having forming a carbonized region by a process to give conductivity to the inner surface of the annular body.Type: GrantFiled: December 8, 2008Date of Patent: March 6, 2012Assignee: Fuji Xerox Co., Ltd.Inventor: Nobuyuki Ichizawa
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Patent number: 8032067Abstract: This invention provides a circular body, which is used for an image forming apparatus employing an electrophotographic system, the circular body containing: at least an inner layer containing resin and an outer layer that is laminated on an outer circumferential surface side of the inner layer and contains resin; and, as a conductive agent, polyaniline in the outer layer and carbon black in the inner layer; and satisfying the following relational expressions (1) and (2): 13.0?C1?15.0??(1) 21.5?C2?25.0??(2), wherein C1 represents the content (parts by weight) of the polyaniline with respect to 100 parts by weight of the resin forming the outer layer, and C2 represents the content (parts by weight) of the carbon black with respect to 100 parts by weight of the resin forming the inner layer, as well as a circular body unit using the circular body and an image forming apparatus using the circular body.Type: GrantFiled: March 25, 2009Date of Patent: October 4, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiko Miyamoto, Nobuyuki Ichizawa, Yousuke Tsutsumi
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Publication number: 20100247171Abstract: The invention provides an annular body having a resin layer. The resin layer has a resin and particles. The particles are at least one of conductive or magnetic. A surface of the resin layer has a first region and a second region. The first region is different from the second region in at least one of the surface resistivity or the magnetic flux density. The second region has a resin region and a high density region. The resin region is provided at an outer side with respect to the high density region in the thickness direction of the resin layer and is substantially free of the particle. The high density region has a higher content of the particles comparing to the resin region and the first region. The invention further provides a cartridge having the annular body. The invention further provides an image forming apparatus having the annular body.Type: ApplicationFiled: November 6, 2009Publication date: September 30, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Masato ONO, Nobuyuki ICHIZAWA, Hideaki KAKYO, Yousuke TSUTSUMI
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Publication number: 20100239764Abstract: A tubular body 101 includes a layer containing a resin and conductive particles 112, the layer having a first region 111C that is free of conductive particles and lies at the outermost surface, and a second region 111B that has higher conductivity than other regions and lies closer to the innermost surface than the first region. A coating film of a coating liquid containing the conductive particles and resin material is dried, and then an eluting solvent for eluting the resin material from the film is applied thereto. As a result of this, the conductive particles are localized in the coating film at the side coated with the eluting solvent. Thereafter, upon drying the eluting solvent, the resin material dissolved in the eluting solvent deposits on the region where the conductive particles are localized, whereby a particle-free resin region free of the conductive particles is formed.Type: ApplicationFiled: September 3, 2009Publication date: September 23, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Nobuyuki ICHIZAWA, Masato ONO, Tomoko SUZUKI
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Publication number: 20090279924Abstract: The invention provides an annular body having an inner surface including a base material layer, the base material layer having a resin and a conductive agent, and the inner surface comprising a carbonized region. The invention further provides an annular body stretching device having: the annular body; and a stretching unit pushing outward the annular body with tension from an inner circumferential side of the annular body. The invention further provides an image forming apparatus having the annular body as an intermediate transfer body provided thereto. The invention further provides a method for forming the annular body, having forming a carbonized region by a process to give conductivity to the inner surface of the annular body.Type: ApplicationFiled: December 8, 2008Publication date: November 12, 2009Applicant: FUJI XEROX CO., LTD.Inventor: Nobuyuki ICHIZAWA
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Publication number: 20090245895Abstract: This invention provides a circular body, which is used for an image forming apparatus employing an electrophotographic system, the circular body containing: at least an _inner layer containing resin and an outer layer that is laminated on an outer circumferential surface side of the inner layer and contains resin; and, as a conductive agent, polyaniline in the outer layer and carbon black in the inner layer; and satisfying the following relational expressions (1) and (2): 13.0?C1?15.0 ??(1) 21.5?C2?25.0 ??(2), wherein C1 represents the content (parts by weight) of the polyaniline with respect to 100 parts by weight of the resin forming the outer layer, and C2 represents the content (parts by weight) of the carbon black with respect to 100 parts by weight of the resin forming the inner layer, as well as a circular body unit using the circular body and an image forming apparatus using the circular body.Type: ApplicationFiled: March 25, 2009Publication date: October 1, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Masahiko MIYAMOTO, Nobuyuki ICHIZAWA, Yousuke TSUTSUMI
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Publication number: 20090245893Abstract: The invention provides an annular body provided at an image forming apparatus, the annular body has at least an outermost periphery layer and an innermost periphery layer, each of which comprise carbon black, and a content of carbon black contained per unit of volume of the outermost periphery layer being smaller than a content of carbon black contained per unit of volume of the innermost periphery layer. The invention further provides an annular body stretching device, having at least the annular body and a plurality of annular body stretching units rotatably stretching the annular body at an inner surface of the annular body. The invention further provides an image forming apparatus having at least an image holder, a charging device, an exposing device, a developing device, a first transferring device, a second transferring device, and a fixing device, in which the intermediate transfer belt is the annular body.Type: ApplicationFiled: September 22, 2008Publication date: October 1, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Masahiko MIYAMOTO, Nobuyuki ICHIZAWA, Yousuke TSUTSUMI, Taku FUKUHARA
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Patent number: 7438405Abstract: The present invention provides an ink set for ink jet recording, an ink jet recording method and an ink jet recording apparatus using the same. The ink set for ink jet recording includes a black ink and color inks including at least cyan, magenta and yellow inks. The black ink includes at least one coagulable agent, and one or more of the color inks is a coagulant-containing color ink containing a coagulant. The contact angle of each of the black ink and the color inks to a recording material is about 50° or less after 1 second of contact. The surface tension of each of the black ink and the color inks is about 40 mN/m or less. The difference between the surface tension of the black ink and that of the coagulant-containing color ink is about 5 mN/m or less.Type: GrantFiled: June 15, 2004Date of Patent: October 21, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Nobuyuki Ichizawa, Yoshiro Yamashita