Patents by Inventor Kimihiro Yoshimura
Kimihiro Yoshimura 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).
-
Patent number: 11181856Abstract: Provided is a fixing member for electrophotography having excellent toner releasability even when used for a long time period. The fixing member includes a base layer, an elastic layer, and a surface layer in the stated order. The surface layer contains a fluorine resin and a fluorine oil having a perfluoropolyether structure. The mass P11 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of a QCM sensor when a measurement sample collected from the surface layer is subjected to a predetermined treatment (i), is 1.0×102 ng or more and 1.0×104 ng or less, and the mass P12 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of the QCM sensor when the sample is subjected to a predetermined treatment (ii), is 0.5×P11 or more and 1.2×P11 or less.Type: GrantFiled: September 15, 2020Date of Patent: November 23, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Patent number: 10983466Abstract: Provided is a fixing member including a base layer, and a surface layer on an outer surface of the base layer directly or with a primer layer interposed between the base layer and the surface layer, in which the surface layer is constituted by a single layer, the surface layer contains a fluororesin, and fluorine oil having a perfluoropolyether structure, and as for a measurement sample taken from the surface layer, when subjecting to predetermined treatments (i) and (ii), masses of an adhered material adhered in a unit area of a detection surface of a QCM sensor and containing the fluorine oil are within specific ranges.Type: GrantFiled: September 15, 2020Date of Patent: April 20, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Publication number: 20210041100Abstract: A premixing apparatus for mixing air with a fuel gas in order to supply a burner with an air-fuel mixture through a fan, wherein a downstream end of a gas supply passage is connected to a gas suction part disposed in a portion, on an upstream side of the fan, of an air supply passage. The gas supply passage has interposed therein a zero governor for adjusting a secondary gas pressure to an atmospheric pressure. Even if the calorific value of the fuel gas may fluctuate, excess air ratio of the air-fuel mixture is arranged to be maintained at a constant value. The premixing apparatus is provided with: an excess air ratio detection device for detecting an excess air ratio of the air-fuel mixture; and a flow control valve interposed in a portion, on a downstream side of the zero governor, of the gas supply passage. The flow control valve is controlled such that the excess air ratio of the air-fuel mixture detected by the excess air ratio detection device becomes constant.Type: ApplicationFiled: June 2, 2020Publication date: February 11, 2021Applicant: RINNAI CORPORATIONInventors: Katsuya Noritake, Masaru Takeuchi, Kimihiro Yoshimura
-
Patent number: 10901354Abstract: Provided is a fixing member in which hot offset of a toner is difficult to be generated. The fixing member has a substrate and a release layer as a surface layer, wherein the release layer includes PFPE and a second fluororesin, the second fluororesin being at least one selected from PFA and FEP, and in a 19F-NMR spectrum of the release layer measured at a temperature of 200° C., a relaxation time T1 of longitudinal relaxation of a peak derived from PFPE is 0.5 seconds or more and 3.5 seconds or less.Type: GrantFiled: March 13, 2019Date of Patent: January 26, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Yasuharu Notoya, Yohei Miyauchi, Kimihiro Yoshimura
-
Publication number: 20210003953Abstract: Provided is a fixing member for electrophotography having excellent toner releasability even when used for a long time period. The fixing member includes a base layer, an elastic layer, and a surface layer in the stated order. The surface layer contains a fluorine resin and a fluorine oil having a perfluoropolyether structure. The mass P11 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of a QCM sensor when a measurement sample collected from the surface layer is subjected to a predetermined treatment (i), is 1.0×102 ng or more and 1.0×104 ng or less, and the mass P12 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of the QCM sensor when the sample is subjected to a predetermined treatment (ii), is 0.5×P11 or more and 1.2×P11 or less.Type: ApplicationFiled: September 15, 2020Publication date: January 7, 2021Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Publication number: 20200409294Abstract: Provided is a fixing member including a base layer, and a surface layer on an outer surface of the base layer directly or with a primer layer interposed between the base layer and the surface layer, in which the surface layer is constituted by a single layer, the surface layer contains a fluororesin, and fluorine oil having a perfluoropolyether structure, and as for a measurement sample taken from the surface layer, when subjecting to predetermined treatments (i) and (ii), masses of an adhered material adhered in a unit area of a detection surface of a QCM sensor and containing the fluorine oil are within specific ranges.Type: ApplicationFiled: September 15, 2020Publication date: December 31, 2020Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Patent number: 10739712Abstract: Provided is a fixing member having an outer surface including excellent toner releasability and excellent scratch resistance, wherein the fixing member has a base material, an elastic layer, and a release layer in this order, the release layer including a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, and has a loss tangent at a frequency of 10 Hz and 180° C. of 5.0×10?2 or more and 3.0×10?1 or less.Type: GrantFiled: March 13, 2019Date of Patent: August 11, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Publication number: 20190294089Abstract: Provided is a fixing member having an outer surface including excellent toner releasability and excellent scratch resistance, wherein the fixing member has a base material, an elastic layer, and a release layer in this order, the release layer including a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, and has a loss tangent at a frequency of 10 Hz and 180° C. of 5.0×10?2 or more and 3.0×101 or less.Type: ApplicationFiled: March 13, 2019Publication date: September 26, 2019Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
-
Publication number: 20190294090Abstract: Provided is a fixing member in which hot offset of a toner is difficult to be generated. The fixing member has a substrate and a release layer as a surface layer, wherein the release layer includes PFPE and a second fluororesin, the second fluororesin being at least one selected from PFA and FEP, and in a 19F-NMR spectrum of the release layer measured at a temperature of 200° C., a relaxation time T1 of longitudinal relaxation of a peak derived from PFPE is 0.5 seconds or more and 3.5 seconds or less.Type: ApplicationFiled: March 13, 2019Publication date: September 26, 2019Inventors: Yasuharu Notoya, Yohei Miyauchi, Kimihiro Yoshimura
-
Patent number: 10025232Abstract: An intermediate transfer member for electrophotography comprising a substrate and a surface layer provided on the substrate. The surface layer comprises a binder resin and a perfluoropolyether. An extraction amount of the perfluoropolyether per 10 mm3 of the surface layer, is 0.10 mg to 5.00 mg, the extraction amount of the perfluoropolyether obtained by immersing the intermediate transfer member into a solvent that can dissolve the perfluoropolyether at 25° C. for 24 hours. A surface of the intermediate transfer member that is not subjected to first and second treatments, has a n-hexadecane contact angle of 55° or more. A surface of the intermediate transfer member that has been subjected to the first treatment, has a n-hexadecane contact angle of 40° or less. A surface of the intermediate transfer member that has been subjected to the second treatment, has a n-hexadecane contact angle of 50° or more.Type: GrantFiled: June 23, 2014Date of Patent: July 17, 2018Assignee: Canon Kabushiki KaishaInventors: Rieko Sakamoto, Kenji Onuma, Naoto Kameyama, Kimihiro Yoshimura, Akira Watanabe, Koichi Sato
-
Patent number: 9791792Abstract: An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.Type: GrantFiled: April 18, 2016Date of Patent: October 17, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Yohei Miyauchi, Kimihiro Yoshimura, Harunobu Ogaki, Atsushi Okuda, Yuki Yamamoto, Wataru Kitamura, Mai Murakami
-
Patent number: 9720353Abstract: The present invention relates to an electrophotographic intermediate transfer member that, even if an image is repeatedly and continuously transferred, can retain its transfer performance and can obtain an excellent image for a long time. The electrophotographic intermediate transfer member has a base layer and a surface layer, the surface layer has a matrix-domain structure in the cross section in the thickness direction, the matrix is formed of a binder resin, the domains contains a perfluoropolyether, and a microhardness of a surface of the electrophotographic intermediate transfer member measured by an ultramicro-hardness meter is 50 MPa or more.Type: GrantFiled: April 3, 2013Date of Patent: August 1, 2017Assignee: Canon Kabushiki KaishaInventors: Rieko Sakamoto, Koichi Sato, Kenji Onuma, Kimihiro Yoshimura, Naoto Kameyama, Yasushi Shimizu, Akira Watanabe
-
Patent number: 9611951Abstract: A solenoid valve has: a valve body; a moving core with a valve body on one end; a guide tube slidably enclosing the moving core; a stationary core disposed in an inner circumference of an opposite end portion of the guide tube so as to face an opposite end of the moving core; a valve spring to urge the moving core in a direction away from the stationary core; an electromagnetic coil disposed to enclose the guide tube; and a magnetic plate disposed on an opposite end of the guide tube having a caulked portion. The guide tube has a caulked portion formed to fix in position the stationary core by engagement of the caulked portion with a recessed groove formed on an outer periphery of the stationary core. When the stationary core is fixed in position by the caulked portion, that surface of the stationary core which faces the magnetic plate is either flush with, or is protruding beyond, the opposite end of the guide tube.Type: GrantFiled: September 1, 2015Date of Patent: April 4, 2017Assignee: RINNAI CORPORATIONInventor: Kimihiro Yoshimura
-
Patent number: 9599232Abstract: A single coil dual solenoid valve includes: first and second moving cores having connected to respective ends thereof first and second valve bodies; first and second plunger tubes having slidably inserted thereinto the first and second moving cores, respectively; first and second stationary cores disposed at respective opposite ends of the first and second plunger tubes so as to lie opposite to the first and second moving cores, respectively; a first frame disposed to connect the first and second stationary cores; a second frame disposed to connect one end of the first and second plunger tubes, respectively; and a single solenoid disposed to enclose one of the first and second plunger tubes. By activating the solenoid, the first and second moving cores are sucked to move toward the respective first and second stationary cores, whereby the first and second valve bodies are changed over.Type: GrantFiled: November 4, 2014Date of Patent: March 21, 2017Assignee: RINNAI CORPORATIONInventor: Kimihiro Yoshimura
-
Patent number: 9575422Abstract: Provided are a method of producing an electrophotographic photosensitive member, particularly, a method of producing an electrophotographic photosensitive member and an organic device by which, in a method of forming a charge transporting layer, the stability of an application liquid for the layer after long-term storage is improved while the usage of an organic solvent in the application liquid is curtailed, and the layer having high uniformity is formed. The method is a method of producing an electrophotographic photosensitive member which includes a support and a charge transporting layer formed thereon, the method including: preparing a solution including: a first liquid whose solubility in water under 25° C. and 1 atmosphere is 1.0 mass % or less; a second liquid whose solubility in water under 25° C. and 1 atmosphere is 5.Type: GrantFiled: December 11, 2012Date of Patent: February 21, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Atsushi Okuda, Keiko Yamagishi, Harunobu Ogaki, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
-
Patent number: 9494882Abstract: The invention has a process of preparing a dispersion liquid by dispersing particles containing a charge transporting substance and a binder resin in liquid medium containing a specific liquid to prepare a dispersion liquid and a process of forming a coat of the dispersion liquid, and heating and drying the coat to dissolve the particles containing the charge transporting substance and the binder resin with liquid medium to form a charge transporting layer.Type: GrantFiled: May 22, 2013Date of Patent: November 15, 2016Assignee: Canon Kabushiki KaishaInventors: Keiko Yamagishi, Harunobu Ogaki, Kimihiro Yoshimura, Hiroki Uematsu, Yohei Miyauchi, Atsushi Okuda
-
Publication number: 20160327876Abstract: An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.Type: ApplicationFiled: April 18, 2016Publication date: November 10, 2016Inventors: Yohei Miyauchi, Kimihiro Yoshimura, Harunobu Ogaki, Atsushi Okuda, Yuki Yamamoto, Wataru Kitamura, Mai Murakami
-
Patent number: 9341964Abstract: In a process for producing an electrophotographic photosensitive member, in particular, a process of forming a charge transporting layer, a production process is provided by which the stability of a charge transporting layer coating fluid even after its storage for a long time is improved so as to form a coat for a charge transporting layer having a high uniformity.Type: GrantFiled: December 14, 2012Date of Patent: May 17, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Harunobu Ogaki, Keiko Yamagishi, Atsushi Okuda, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
-
Publication number: 20160123476Abstract: A single coil dual solenoid valve includes: first and second moving cores having connected to respective ends thereof first and second valve bodies; first and second plunger tubes having slidably inserted thereinto the first and second moving cores, respectively; first and second stationary cores disposed at respective opposite ends of the first and second plunger tubes so as to lie opposite to the first and second moving cores, respectively; a first frame disposed to connect the first and second stationary cores; a second frame disposed to connect one end of the first and second plunger tubes, respectively; and a single solenoid disposed to enclose one of the first and second plunger tubes. By activating the solenoid, the first and second moving cores are sucked to move toward the respective first and second stationary cores, whereby the first and second valve bodies are changed over.Type: ApplicationFiled: November 4, 2014Publication date: May 5, 2016Applicant: RINNAI CORPORATIONInventor: Kimihiro Yoshimura
-
Publication number: 20160084399Abstract: A solenoid valve has: a valve body; a moving core with a valve body on one end; a guide tube slidably enclosing the moving core; a stationary core disposed in an inner circumference of an opposite end portion of the guide tube so as to face an opposite end of the moving core; a valve spring to urge the moving core in a direction away from the stationary core; an electromagnetic coil disposed to enclose the guide tube; and a magnetic plate disposed on an opposite end of the guide tube having a caulked portion. The guide tube has a caulked portion formed to fix in position the stationary core by engagement of the caulked portion with a recessed groove formed on an outer periphery of the stationary core. When the stationary core is fixed in position by the caulked portion, that surface of the stationary core which faces the magnetic plate is either flush with, or is protruding beyond, the opposite end of the guide tube.Type: ApplicationFiled: September 1, 2015Publication date: March 24, 2016Applicant: RINNAI CORPORATIONInventor: Kimihiro Yoshimura