Patents by Inventor Masaya Kawada
Masaya Kawada 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: 9547272Abstract: To provide a cleaning blade having an elastic body portion containing urethane rubber and a support member supporting the elastic body portion. A free end portion of the elastic body has a first region in which the Young's modulus gradually decreases in the depth direction from the principal surface facing the surface of the member to be cleaned on the edge face side and a second region in which the Young's modulus does not vary in the depth direction from the principal surface on the side closer to the support member relative to the first region.Type: GrantFiled: October 27, 2015Date of Patent: January 17, 2017Assignee: Canon Kabushiki KaishaInventors: Shingo Ito, Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe
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Patent number: 9541887Abstract: A cleaning blade includes an image region and a non-image region in which Young's moduli at positions separated by a distance of L ?m from an edge portion in contact with an photosensitive drum are respectively defined as YL and Y?L, Y0 and Y?0 are 10 mgf/?m2 or more and 400 mgf/?m2 or less, Y50/Y0 is 0.5 or less, [{(Y0?Y20)/Y0}/(20?0)] is equal to or more than [{(Y20?Y50)/Y0}/(50?20)] and, the Young's modulus Y50 ?the Young's modulus Y?L where L satisfies 0?L ?100 ?m.Type: GrantFiled: October 23, 2015Date of Patent: January 10, 2017Assignee: Canon Kabushiki KaishaInventors: Masanobu Nakajima, Norihiko Kubo, Hisataka Hisakuni, Masaya Kawada, Kenji Karashima
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Publication number: 20160124375Abstract: A cleaning blade includes an image region and a non-image region in which Young's moduli at positions separated by a distance of L ?m from an edge portion in contact with an photosensitive drum are respectively defined as YL and Y?L, Y0 and Y?0 are 10 mgf/?m2 or more and 400 mgf/?m2 or less, Y50/Y0 is 0.5 or less, [{(Y0?Y20)/Y0}/(20?0)] is equal to or more than [{(Y20?Y50)/Y0}/(50?20)] and, the Young's modulus Y50 the Young's modulus Y?L where L satisfies 0?L?100 ?m.Type: ApplicationFiled: October 23, 2015Publication date: May 5, 2016Inventors: Masanobu Nakajima, Norihiko Kubo, Hisataka Hisakuni, Masaya Kawada, Kenji Karashima
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Publication number: 20160124376Abstract: To provide a cleaning blade having an elastic body portion containing urethane rubber and a support member supporting the elastic body portion. A free end portion of the elastic body has a first region in which the Young's modulus gradually decreases in the depth direction from the principal surface facing the surface of the member to be cleaned on the edge face side and a second region in which the Young's modulus does not vary in the depth direction from the principal surface on the side closer to the support member relative to the first region.Type: ApplicationFiled: October 27, 2015Publication date: May 5, 2016Inventors: Shingo Ito, Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe
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Patent number: 9170556Abstract: A urethane rubber cleaning blade, wherein a surface of a contact portion of the cleaning blade that comes into contact with a member to be cleaned has a Young's modulus (Y0) of 10 mgf/?m2 or more and 400 mgf/?m2 or less, the ratio (Y50/Y0) of the Young's modulus (Y50) of an internal portion of the cleaning blade 50 ?m spaced apart from the surface of the contact portion to the Young's modulus (Y0) is 0.5 or less, and the average rate of change in Young's modulus from the surface to an internal portion of the cleaning blade 20 ?m spaced apart from the surface is greater than or equal to the average rate of change in Young's modulus from the internal portion of the cleaning blade 20 ?m spaced apart from the surface to an internal portion of the cleaning blade 50 ?m spaced apart from the surface.Type: GrantFiled: April 28, 2014Date of Patent: October 27, 2015Assignee: Canon Kabushiki KaishaInventors: Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe, Shingo Ito
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Patent number: 9037069Abstract: In a method for producing a cleaning blade, a first composition obtained by causing a reaction of diphenylmethane diisocyanate and a first aliphatic polyester polyol which has a number-average molecular weight of 2000 to 3500 and is used in an amount of 20 to 40 mol % relative to the diphenylmethane diisocyanate and a second composition containing a urethane rubber-synthesizing catalyst and a second aliphatic polyester polyol which has a number-average molecular weight of 2000 to 3500 and is the same as or different from the first aliphatic polyester polyol are mixed so that a relationship between a number of moles (MNCO [mol]) of an NCO group in the first composition and a number of moles (MOH [mol]) of an OH group in the second composition satisfies 0.05?MOH/MNCO?0.20.Type: GrantFiled: April 28, 2014Date of Patent: May 19, 2015Assignee: Canon Kabushiki KaishaInventors: Masahiro Watabe, Masaya Kawada, Tomohiro Tanoue
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Patent number: 9026027Abstract: A cleaning blade includes a polyester urethane rubber. In an IR spectrum measured by ?ATR on the surface of a contact portion of the polyester urethane rubber at which the cleaning blade comes into contact with a member to be cleaned, a ratio (ISI/ISE) of an intensity (ISI) of a C—N peak due to an isocyanurate group included in the polyester urethane rubber to an intensity (ISE) of a C?O peak due to an ester group included in the polyester urethane rubber is 0.65 or more and 2.50 or less. A siloxane compound is present on the surface of the contact portion of the polyester urethane rubber.Type: GrantFiled: April 28, 2014Date of Patent: May 5, 2015Assignee: Canon Kabushiki KaishaInventors: Tomohiro Tanoue, Masahiro Watabe, Masaya Kawada
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Publication number: 20140321880Abstract: A urethane rubber cleaning blade, wherein a surface of a contact portion of the cleaning blade that comes into contact with a member to be cleaned has a Young's modulus (Y0) of 10 mgf/?m2 or more and 400 mgf/?m2 or less, the ratio (Y50/Y0) of the Young's modulus (Y50) of an internal portion of the cleaning blade 50 ?m spaced apart from the surface of the contact portion to the Young's modulus (Y0) is 0.5 or less, and the average rate of change in Young's modulus from the surface to an internal portion of the cleaning blade 20 ?m spaced apart from the surface is greater than or equal to the average rate of change in Young's modulus from the internal portion of the cleaning blade 20 ?m spaced apart from the surface to an internal portion of the cleaning blade 50 ?m spaced apart from the surface.Type: ApplicationFiled: April 28, 2014Publication date: October 30, 2014Inventors: Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe, Shingo Ito
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Publication number: 20140323667Abstract: In a method for producing a cleaning blade, a first composition obtained by causing a reaction of diphenylmethane diisocyanate and a first aliphatic polyester polyol which has a number-average molecular weight of 2000 to 3500 and is used in an amount of 20 to 40 mol % relative to the diphenylmethane diisocyanate and a second composition containing a urethane rubber-synthesizing catalyst and a second aliphatic polyester polyol which has a number-average molecular weight of 2000 to 3500 and is the same as or different from the first aliphatic polyester polyol are mixed so that a relationship between a number of moles (MNCO [mol]) of an NCO group in the first composition and a number of moles (MOH [mol]) of an OH group in the second composition satisfies 0.05?MOH/MNCO?0.20.Type: ApplicationFiled: April 28, 2014Publication date: October 30, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Masahiro Watabe, Masaya Kawada, Tomohiro Tanoue
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Publication number: 20140321895Abstract: A cleaning blade includes a polyester urethane rubber. In an IR spectrum measured by ?ATR on the surface of a contact portion of the polyester urethane rubber at which the cleaning blade comes into contact with a member to be cleaned, a ratio (ISI/ISE) of an intensity (ISI) of a C—N peak due to an isocyanurate group included in the polyester urethane rubber to an intensity (ISE) of a C?O peak due to an ester group included in the polyester urethane rubber is 0.65 or more and 2.50 or less. A siloxane compound is present on the surface of the contact portion of the polyester urethane rubber.Type: ApplicationFiled: April 28, 2014Publication date: October 30, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Tomohiro Tanoue, Masahiro Watabe, Masaya Kawada
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Patent number: 8530129Abstract: Provided is an image forming method in which hydrophobized calcium carbonate particles having a number average particle diameter of 30 to 300 nm and hydrophobized strontium titanate particles having a number average particle diameter of 30 to 300 nm are applied to the surface of an image bearing member.Type: GrantFiled: July 1, 2011Date of Patent: September 10, 2013Assignee: Canon Kabushiki KaishaInventors: Masayuki Hama, Masaya Kawada, Masaharu Miura
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Publication number: 20120003580Abstract: Provided is an image forming method in which hydrophobized calcium carbonate particles having a number average particle diameter of 30 to 300 nm and hydrophobized strontium titanate particles having a number average particle diameter of 30 to 300 nm are applied to the surface of an image bearing member.Type: ApplicationFiled: July 1, 2011Publication date: January 5, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Masayuki Hama, Masaya Kawada, Masaharu Miura
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Patent number: 7280785Abstract: An image forming apparatus provided with a photosensitive member, a charging device for charging the photosensitive member, a developing device for developing an electrostatic image formed on the photosensitive member by a developer, a cleaning blade for removing the developer residual on the photosensitive member, a rubbing member provided upstream of the cleaning blade in the direction of rotation of the photosensitive member for rubbing the photosensitive member to assist the cleaning blade in cleaning, and a controller for controlling the surface temperature of the photosensitive member, wherein the photosensitive member has the HU (universal hardness value) of 150 N/mm2 or greater and 220 N/mm2 or less, and the elastic deformation rate of 43% or greater and 65% or less.Type: GrantFiled: September 22, 2006Date of Patent: October 9, 2007Assignee: Canon Kabushiki KaishaInventors: Masaya Kawada, Hiroaki Kawakami, Noriyoshi Umeda
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Patent number: 7177581Abstract: An image forming apparatus provided with a photosensitive member, a charging device for charging the photosensitive member, a developing device for developing an electrostatic image formed on the photosensitive member by a developer, a cleaning blade for removing the developer residual on the photosensitive member, a rubbing member provided upstream of the cleaning blade in the direction of rotation of the photosensitive member for rubbing the photosensitive member to assist the cleaning blade in cleaning, and a controller for controlling the surface temperature of the photosensitive member, wherein the photosensitive member has the HU (universal hardness value) of 150 N/mm2 or greater and 220 N/mm2 or less, and the elastic deformation rate of 43% or greater and 65% or less.Type: GrantFiled: November 24, 2004Date of Patent: February 13, 2007Assignee: Canon Kabushiki KaishaInventors: Masaya Kawada, Hiroaki Kawakami, Noriyoshi Umeda
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Publication number: 20070019982Abstract: An image forming apparatus provided with a photosensitive member, a charging device for charging the photosensitive member, a developing device for developing an electrostatic image formed on the photosensitive member by a developer, a cleaning blade for removing the developer residual on the photosensitive member, a rubbing member provided upstream of the cleaning blade in the direction of rotation of the photosensitive member for rubbing the photosensitive member to assist the cleaning blade in cleaning, and a controller for controlling the surface temperature of the photosensitive member, wherein the photosensitive member has the HU (universal hardness value) of 150 N/mm2 or greater and 220 N/mm2 or less, and the elastic deformation rate of 43% or greater and 65% or less.Type: ApplicationFiled: September 22, 2006Publication date: January 25, 2007Applicant: Canon Kabushiki KaishaInventors: Masaya Kawada, Hiroaki Kawakami, Noriyoshi Umeda
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Patent number: 7060406Abstract: A light-receiving member comprising a conductive substrate, and formed superposingly thereon a photosensitive layer and a surface protective layer in order. The light-receiving member has a surface roughness Ra of from 15 nm to 100 nm. Also disclosed is an image-forming apparatus having such a light-receiving member, and an image-forming method of rendering visible an electrostatic pattern formed on the light-receiving member. The light-receiving member promises stable formation of images over a long period of time.Type: GrantFiled: May 2, 2003Date of Patent: June 13, 2006Assignee: Canon Kabushiki KaishaInventors: Kunimasa Kawamura, Shigenori Ueda, Toshiyuki Ehara, Junichiro Hashizume, Ryuji Okamura, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki
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Publication number: 20050117944Abstract: An image forming apparatus provided with a photosensitive member, a charging device for charging the photosensitive member, a developing device for developing an electrostatic image formed on the photosensitive member by a developer, a cleaning blade for removing the developer residual on the photosensitive member, a rubbing member provided upstream of the cleaning blade in the direction of rotation of the photosensitive member for rubbing the photosensitive member to assist the cleaning blade in cleaning, and a controller for controlling the surface temperature of the photosensitive member, wherein the photosensitive member has the HU (universal hardness value) of 150 N/mm2 or greater and 220 N/mm2 or less, and the elastic deformation rate of 43% or greater and 65% or less.Type: ApplicationFiled: November 24, 2004Publication date: June 2, 2005Applicant: Canon Kabushiki KaishaInventors: Masaya Kawada, Hiroaki Kawakami, Noriyoshi Umeda
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Patent number: 6846600Abstract: A process for producing an electrophotographic photosensitive member comprising the steps of depositing a non-single crystal material composed basically of silicon atoms, on a cylindrical substrate in a deposition chamber, thereafter once taking the substrate with film out of the deposition chamber, then returning it to the deposition chamber, and thereafter again depositing thereon a non-single-crystal material composed basically of carbon atoms. In another embodiment, the process comprises the steps of depositing on a cylindrical substrate a photoconductive layer formed of a non-single crystal material, subjecting to surface processing the deposited film having protrusions present at its surface, and depositing on the processed surface a surface protective layer formed of a non-single-crystal material. Also disclosed is the electrophotographic photosensitive member thus obtained, and an electrophotographic apparatus having that member.Type: GrantFiled: January 31, 2002Date of Patent: January 25, 2005Assignee: Canon Kabushiki KaishaInventors: Toshiyuki Ehara, Junichiro Hashizume, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki, Kunimasa Kawamura, Ryuji Okamura, Kazuto Hosoi
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Patent number: 6764800Abstract: In an electrophotographic image process, a latent image is formed on a photosensitive drum, and a toner image is formed on the latent image. The toner image is temporarily transferred onto an intermediate image-transfer element. The photosensitive drum and the intermediate image-transfer element are brought into contact at an intended contact pressure and are rotated at a prescribed relative speed. At the contact portion, fine vibrations of the photosensitive drum and the intermediate image-transfer element, which can be caused by repeated contact and separation are prevented by controlling the contact temperature between the photosensitive member and the intermediate image-transfer element to be in the range of 15 to 60° C. A kinetic frictional deviation (a standard deviation of a kinetic frictional force) is controlled to be less than the average value of the kinetic frictional force. By suppressing the fine vibration, deviation in image transfer is prevented.Type: GrantFiled: April 26, 2001Date of Patent: July 20, 2004Assignee: Canon Kabushiki KaishaInventors: Koji Yamazaki, Hiroyuki Kobayashi, Masaya Kawada, Tetsuya Karaki, Hironori Owaki
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Publication number: 20040048180Abstract: There is provided an electrophotographic method, in which influence on an image quality attributable to the conditions of the photoreceptor surface is reduced and much sharper and high image quality having high resolution is obtained, when a spot size of the exposure light is made finer as progress is made in high resolution. In a digital exposure system electrophotographic method of a BAE system which performs scan-exposing for an image formation on a photoreceptor, a photoreceptor comprising a supporting member 401 comprising aluminum or an aluminum alloy and a photosensitive layer 402 deposited on the supporting member surface by applying surface treatment using water on its surface, on which a convex structure is formed corresponding to a boundary portion of a crystal grain boundary of the supporting member surface is used.Type: ApplicationFiled: September 12, 2003Publication date: March 11, 2004Applicant: Canon Kabushiki KaishaInventors: Satoshi Kojima, Koji Yamazaki, Toshiyuki Ehara, Kazuhiko Takada, Masaya Kawada, Hironori Ohwaki