Patents by Inventor Kazuhito Wakabayashi
Kazuhito Wakabayashi 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: 20140093278Abstract: A high quality electrophotographic member that is excellent in deformation recovery property under high-temperature and high-humidity and that also satisfies filming resistance under low-temperature and low-humidity is provided. The electrophotographic member includes a substrate, an elastic layer, and a surface layer containing a urethane resin, wherein the urethane resin has a partial structure having at least one structure selected from the group consisting of structures of structural formulae (1) to (7) between adjacent two urethane linkages, and the urethane resin further has a partial structure derived from a reaction of a compound represented by a structural formula (8) with a polyisocyanate.Type: ApplicationFiled: December 9, 2013Publication date: April 3, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Masaki Yamada, Kazutoshi Ishida, Minoru Ito, Kazuhito Wakabayashi, Tomoya Uesugi
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Patent number: 8628846Abstract: Provided is a developer carrying member that can stably provide a negatively chargeable developer with triboelectric charge and whose surface hardly wears even after its long-term use. The developer carrying member is a developer carrying member, comprising: a substrate; and a surface layer, wherein: the surface layer contains a matrix resin and electro-conductive particles; and the matrix resin contains a crosslinked product of a polymer chain having units represented by the following structural formula (1) and the following structural formula (2), and a polymer chain represented by the following structural formula (3).Type: GrantFiled: January 17, 2013Date of Patent: January 14, 2014Assignee: Canon Kabushiki KaishaInventors: Kazuhito Wakabayashi, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Takuma Matsuda, Minoru Ito, Atsushi Noguchi, Hironori Mori
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Patent number: 8546051Abstract: A developer bearing member is provided which can charge a toner stably and uniformly during the period from the initial stage to the terminal stage of extensive operation even in various environments. The developer bearing member includes a substrate and an electrically conductive resin coating layer formed on the surface thereof. The electrically conductive resin coating layer is formed from a resin composition containing a phenolic resin having in its structure at least one of an —NH2 group, an ?NH group and an —NH— linkage, a quaternary phosphonium salt and electrically conductive fine particles and the resin composition contains 1 part by mass or more and 60 parts by mass or less of the quaternary phosphonium salt with respect to 100 parts by mass of the phenolic resin.Type: GrantFiled: July 23, 2009Date of Patent: October 1, 2013Assignee: Canon Kabushiki KaishaInventors: Satoshi Otake, Masayoshi Shimamura, Yasutaka Akashi, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Patent number: 8538303Abstract: A developer carrying member having less environmental dependence is provided. The developer carrying member has a substrate and a resin layer, which resin layer contains an acrylic resin; the acrylic resin having a unit (1) represented by the following formula (1) and a unit (2) represented by the following formula (2). In the formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents an alkylene group having 1 to 4 carbon atoms, and an asterisk * represents the part of linkage to the part shown by a double asterisk ** in the formula (2). In the formula (2), R3 represents a hydrogen atom or a methyl group; R4 represents an alkylene group having 1 to 4 carbon atom(s); R5, R6 and R7 each represent an alkyl group having 1 to 18 carbon atoms; A? represents an anion.Type: GrantFiled: November 1, 2012Date of Patent: September 17, 2013Assignee: Canon Kabushiki KaishaInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akahashi, Satoshi Otake, Minoru Ito, Kazuhito Wakabayashi, Atsushi Noguchi, Hironori Mori
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Patent number: 8377549Abstract: The present invention relates to a developer carrying member which includes a substrate and the resin layer formed on the surface of the substrate, wherein the resin layer is obtained by thermally curing the coating material composition including at least the following (A) to (E): (A) a thermosetting resin as a binder resin; (B) an alcohol as a solvent, containing 1 to 4 carbon atoms; (C) a resin including the unit represented by the following formula (1); (D) graphitized carbon black having a graphite (002) lattice spacing of 0.3370 nm or more and 0.3450 nm or less as measured by X-ray diffraction; and (E) acid carbon black having a pH of 5.Type: GrantFiled: July 14, 2011Date of Patent: February 19, 2013Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Takayama, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Patent number: 8372570Abstract: The present invention provides a developer carrying member capable of maintaining excellent charge imparting property even under long-term use. The present invention relates to a developer carrying member including a substrate and a resin layer, wherein the resin layer includes an acrylic resin having three specific structural units and electroconductive particles.Type: GrantFiled: July 15, 2011Date of Patent: February 12, 2013Assignee: Canon Kabushiki KaishaInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Yoshiyuki Takayama, Kazuhito Wakabayashi
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Patent number: 8295745Abstract: A developer carrying member and a developing assembly are provided which can stably provide the toner with triboelectric charges, may prevent any problems such as image density decrease, density non-uniformity and spots around images even during running on a large number of sheets, and can enjoy a stable and good developing performance. The developer carrying member has a substrate and a resin layer, and the resin layer containing a thermosetting resin, an acrylic resin having specific units and electroconductive particles.Type: GrantFiled: May 27, 2011Date of Patent: October 23, 2012Assignee: Canon Kabushiki KaishaInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Yoshiyuki Takayama, Kazuhito Wakabayashi
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Patent number: 8059997Abstract: A developer carrying member is disclosed which can stably provide toners with triboelectric charges even in various environments. The developer carrying member has a substrate and a resin layer as a surface layer formed on the surface of the substrate, and the resin layer contains a thermosetting resin as a binder resin, an acrylic resin having two units having specific structures, and conductive particles.Type: GrantFiled: April 20, 2010Date of Patent: November 15, 2011Assignee: Canon Kabushiki KaishaInventors: Satoshi Otake, Masayoshi Shimamura, Yasutaka Akashi, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Publication number: 20110274467Abstract: The present invention relates to a developer carrying member which includes a substrate and the resin layer formed on the surface of the substrate, wherein the resin layer is obtained by thermally curing the coating material composition including at least the following (A) to (E): (A) a thermosetting resin as a binder resin; (B) an alcohol as a solvent, containing 1 to 4 carbon atoms; (C) a resin including the unit represented by the following formula (1); (D) graphitized carbon black having a graphite (002) lattice spacing of 0.3370 nm or more and 0.3450 nm or less as measured by X-ray diffraction; and (E) acid carbon black having a pH of 5.Type: ApplicationFiled: July 14, 2011Publication date: November 10, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yoshiyuki Takayama, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Publication number: 20110268477Abstract: The present invention provides a developer carrying member capable of maintaining excellent charge imparting property even under long-term use. The present invention relates to a developer carrying member including a substrate and a resin layer, wherein the resin layer includes an acrylic resin having three specific structural units and electroconductive particles.Type: ApplicationFiled: July 15, 2011Publication date: November 3, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Yoshiyuki Takayama, Kazuhito Wakabayashi
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Publication number: 20110229218Abstract: A developer carrying member and a developing assembly are provided which can stably provide the toner with triboelectric charges, may less cause any problems such as image density decrease, density non-uniformity and spots around images even during running on a large number of sheets, and can enjoy a stable and good developing performance. The developer carrying member has a substrate and a resin layer, and the resin layer containing a thermosetting resin, an acrylic resin having specific units and electroconductive particles.Type: ApplicationFiled: May 27, 2011Publication date: September 22, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Yoshiyuki Takayama, Kazuhito Wakabayashi
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Patent number: 7796926Abstract: A developing apparatus is provided which can suppress a fluctuation in image density in a discontinuous printing mode provided with a pause period. The developing apparatus includes a developer for developing an electrostatic latent image on a photosensitive drum, a developer bearing member for carrying and conveying the developer and a developer layer thickness-regulating unit placed close to the developer bearing member for regulating the amount of the developer carried and conveyed by the developer bearing member, the developer layer thickness-regulating unit being. As the developer, a negatively chargeable, one-component, magnetic toner is used having magnetic toner particles containing a binder resin and a magnetic iron oxide particle, and has a specific saturation magnetization, specific weight-average particle diameter and specific composition.Type: GrantFiled: June 17, 2009Date of Patent: September 14, 2010Assignee: Canon Kabushiki KaishaInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Kazuhito Wakabayashi, Daisuke Yoshiba
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Publication number: 20100223556Abstract: In an analyzing system including a plurality of analyzing apparatuses and an operational status collector for collecting the analyzing apparatus' operational status by way of a data communication network, each status of the plurality of analyzing apparatuses is conventionally displayed in the form of a list. This causes a problem that there is no knowing the installation position of an actual analyzing apparatus from a client for analysis which is installed separately from the analyzing apparatus. In the operational status display system for an analyzing apparatus according to the present invention, an analyzing apparatus arrangement image is displayed in which the arrangement positions of the analyzing apparatuses are illustrated with apparatus images. The user can easily grasp the actual arrangement position of an analyzing apparatus. Alternatively, each analyzing apparatus' operational status may be displayed on the apparatus image.Type: ApplicationFiled: January 30, 2006Publication date: September 2, 2010Applicant: SHIMADZU CORPORATIONInventors: Kazuhito Wakabayashi, Ryuji Nishimoto
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Publication number: 20100202801Abstract: A developer carrying member is disclosed which can stably provide toners with triboelectric charges even in various environments. The developer carrying member has a substrate and a resin layer as a surface layer formed on the surface of the substrate, and the resin layer contains a thermosetting resin as a binder resin, an acrylic resin having two units having specific structures, and conductive particles.Type: ApplicationFiled: April 20, 2010Publication date: August 12, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Otake, Masayoshi Shimamura, Yasutaka Akashi, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Publication number: 20100028792Abstract: A developer bearing member is provided which can charge a toner stably and uniformly during the period from the initial stage to the terminal stage of extensive operation even in various environments. The developer bearing member includes a substrate and an electrically conductive resin coating layer formed on the surface thereof. The electrically conductive resin coating layer is formed from a resin composition containing a phenolic resin having in its structure at least one of an —NH2 group, an ?NH group and an —NH— linkage, a quaternary phosphonium salt and electrically conductive fine particles and the resin composition contains 1 part by mass or more and 60 parts by mass or less of the quaternary phosphonium salt with respect to 100 parts by mass of the phenolic resin.Type: ApplicationFiled: July 23, 2009Publication date: February 4, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Otake, Masayoshi Shimamura, Yasutaka Akashi, Takuma Matsuda, Minoru Ito, Kazuhito Wakabayashi
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Publication number: 20090257788Abstract: A developing apparatus is provided which can suppress a fluctuation in image density in a discontinuous printing mode provided with a pause period. The developing apparatus includes a developer for developing an electrostatic latent image on a photosensitive drum, a developer bearing member for carrying and conveying the developer and a developer layer thickness-regulating unit placed close to the developer bearing member for regulating the amount of the developer carried and conveyed by the developer bearing member, the developer layer thickness-regulating unit being. As the developer, a negatively chargeable, one-component, magnetic toner is used having magnetic toner particles containing a binder resin and a magnetic iron oxide particle, and has a specific saturation magnetization, specific weight-average particle diameter and specific composition.Type: ApplicationFiled: June 17, 2009Publication date: October 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akashi, Satoshi Otake, Minoru Ito, Kazuhito Wakabayashi, Daisuke Yoshiba
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Patent number: 7420563Abstract: The present invention provides an analysis data management system with which users can efficiently check a number of analysis results obtained through a batch analysis or some other process. The system creates a list of waveform images each showing a chromatogram or spectrum representing each of the analysis results. This list facilitates the visual checking of whether there is any abnormal waveform. After checking each checkbox corresponding to each waveform image showing an abnormal waveform, the user performs a predetermined operation, in response to which the system creates a list of analysis setting data corresponding to the checked waveform images. After changing the setting data on the list according to necessity, the user commands the system to carry out the batch process again.Type: GrantFiled: November 23, 2005Date of Patent: September 2, 2008Assignee: Shimadzu CorporationInventor: Kazuhito Wakabayashi
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Publication number: 20060123349Abstract: The present invention provides an analysis data management system with which users can efficiently check a number of analysis results obtained through a batch analysis or some other process. The system creates a list of waveform images each showing a chromatogram or spectrum representing each of the analysis results. This list facilitates the visual checking of whether there is any abnormal waveform. After checking each checkbox corresponding to each waveform image showing an abnormal waveform, the user performs a predetermined operation, in response to which the system creates a list of analysis setting data corresponding to the checked waveform images. After changing the setting data on the list according to necessity, the user commands the system to carry out the batch process again.Type: ApplicationFiled: November 23, 2005Publication date: June 8, 2006Applicant: SHIMADZU CORPORATIONInventor: Kazuhito Wakabayashi
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Patent number: 5345354Abstract: This invention relates to a wide-write/narrow-read head having a pair of C-shaped cores one of which is used as a read core and the other of which is used as a write core, and a closure core which is provided between the two cores to shut off side magnetic circuits at the time of data reading. The closure is reduced in thickness at the tip end and is shaped to slope toward the read head so as to increase magnetic resistance from said closure core to said read core in order to prevent the magnetic flux extending between said write core and said closure core from leaking into said read core from said closure core.Type: GrantFiled: April 12, 1993Date of Patent: September 6, 1994Assignee: TDK CorporationInventors: Tomio Ito, Hideyuki Miyazaki, Hideyuki Moriya, Kazuhito Wakabayashi
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Patent number: 5229904Abstract: This invention relates to a wide-write/narrow-read head having a pair of C-shaped cores one of which is used as a read core and the other of which is used as a write core, and a closure core which is provided between the two cores to shut off side magnetic circuits at the time of data reading. The closure core is reduced in thickness at the tip end and is shaped to slope toward the rear head so as to increase magnetic resistances from said closure core to said read core in order to prevent the magnetic flux extending between said write core and said closure core from leaking into said read core from said closure core.Type: GrantFiled: June 25, 1991Date of Patent: July 20, 1993Assignee: TDK CorporationInventors: Tomio Ito, Hideyuki Miyazaki, Hideyuki Moriya, Kazuhito Wakabayashi