Patents by Inventor Yasuharu Saita
Yasuharu Saita 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: 20220040980Abstract: There is provided a method for cleaning an ink discharger of an inkjet head, and the method includes causing dry ice particles to collide with an ink discharge port of an inkjet head.Type: ApplicationFiled: July 29, 2021Publication date: February 10, 2022Inventors: Junji UJIHARA, Yasuharu SAITA
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Publication number: 20220009235Abstract: There is provided a cleaning method of a flow path in an inkjet head, including: introducing cleaning liquid into the flow path in the inkjet head; and introducing gas into the flow path in the inkjet head, wherein bubbles made of the gas are generated in the cleaning liquid introduced into the flow path.Type: ApplicationFiled: June 21, 2021Publication date: January 13, 2022Inventors: Junji UJIHARA, Yasuharu SAITA
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Patent number: 11168209Abstract: Provided is a resin mixture containing two kinds of polycarbonate particles having different weight average molecular weights, wherein a melt flow rate (MFR-1) of a blended material of the polycarbonate particles and a melt flow rate (MFR-2) of a kneaded material of the polycarbonate particles satisfy the following relation (1), Relation (1): MRF-2<MRF-1, provided that MRF-1 and MRF-2 are measured using a melt flow rate (MRF) measuring apparatus under conditions of a temperature 300° C. and a load of 1.2 kg.Type: GrantFiled: November 7, 2019Date of Patent: November 9, 2021Assignee: KONICA MINOLTA, INC.Inventors: Toshio Tsukamoto, Yasuharu Saita
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Publication number: 20200231802Abstract: Provided is a resin mixture containing two kinds of polycarbonate particles having different weight average molecular weights, wherein a melt flow rate (MFR-1) of a blended material of the polycarbonate particles and a melt flow rate (MFR-2) of a kneaded material of the polycarbonate particles satisfy the following relation (1), Relation (1): MRF-2<MRF-1, provided that MRF-1 and MRF-2 are measured using a melt flow rate (MRF) measuring apparatus under conditions of a temperature 300° C. and a load of 1.2 kg.Type: ApplicationFiled: November 7, 2019Publication date: July 23, 2020Inventors: Toshio TSUKAMOTO, Yasuharu SAITA
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Patent number: 8865795Abstract: A copier/printer exterior part uses a halogen-free flame-retardant resin composition. The halogen-free flame-retardant resin composition includes 5 wt % to 50 wt % of unused polycarbonate, 20 wt % to 63 wt % of recycled polycarbonate, 5 wt % to 35 wt % of recycled polyethylene terephthalate, 0.2 wt % to 2 wt % of a styrene-acrylonitrile-glycidyl methacrylate terpolymer, 5 wt % to 15 wt % of a toughener, 10 wt % to 20 wt % of a flame retardant, 0.1 wt % to 0.8 wt % of a flame-retardant antidrip agent, 0.1 wt % to 1 wt % of an antioxidant, and 0.1 wt % to 2 wt % of a lubricant. The styrene-acrylonitrile-glycidyl methacrylate terpolymer includes 1 wt % to 5 wt % of glycidyl methacrylate and 20 wt % to 33 wt % of acrylonitrile.Type: GrantFiled: June 12, 2014Date of Patent: October 21, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Minqi Xin, Minghua Luo, Wenqiang Li, Lei Gao, Qiang Li, Ryuji Kitani, Yasuharu Saita
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Publication number: 20140296383Abstract: A copier/printer exterior part uses a halogen-free flame-retardant resin composition. The halogen-free flame-retardant resin composition includes 5 wt % to 50 wt % of unused polycarbonate, 20 wt % to 63 wt % of recycled polycarbonate 5 wt % to 35 wt % of recycled polyethylene terephthalate, 0.2 wt % to 2 wt % of a styrene-acrylonitrile-glycidyl methacrylate terpolymer, 5 wt % to 15 wt % of a toughener, 10 wt % to 20 wt % of a flame retardant, 0.1 wt % to 0.8 wt % of a flame-retardant antidrip agent, 0.1 wt % to 1 wt % of an antioxidant, and 0.1 wt % to 2 wt % of a lubricant. The styrene-acrylonitrile-glycidyl methacrylate terpolymer includes 1 wt % to 5 wt % of glycidyl methacrylate and 20 wt % to 33 wt % of acrylonitrile.Type: ApplicationFiled: June 12, 2014Publication date: October 2, 2014Applicants: SHANGHAI KUMHOSUNNY PLASTICS CO., LTD., KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Minqi XIN, Minghua LUO, Wenqiang LI, Lei GAO, Qiang LI, Ryuji KITANI, Yasuharu SAITA
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Publication number: 20130237644Abstract: A copier/printer exterior part uses a halogen-free flame-retardant resin composition. The halogen-free flame-retardant resin composition includes 5 wt % to 50 wt % of unused polycarbonate, 20 wt % to 63 wt % of recycled polycarbonate, 5 wt % to 35 wt % of recycled polyethylene terephthalate, 0.2 wt % to 2 wt % of a styrene-acrylonitrile-glycidyl methacrylate terpolymer, 5 wt % to 15 wt % of a toughener, 10 wt % to 20 wt % of a flame retardant, 0.1 wt % to 0.8 wt % of a flame-retardant antidrip agent, 0.1 wt % to 1 wt % of an antioxidant, and 0.1 wt % to 2 wt % of a lubricant. The styrene-acrylonitrile-glycidyl methacrylate terpolymer includes 1 wt % to 5 wt % of glycidyl methacrylate and 20 wt % to 33 wt % of acrylonitrile.Type: ApplicationFiled: January 17, 2013Publication date: September 12, 2013Inventors: Minqi XIN, Minghua LUO, Wenqiang LI, Lei GAO, Qiang LI, Ryuji KITANI, Yasuharu SAITA
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Patent number: 8293181Abstract: Provided is a tubular flow reactor containing: a cylindrical channel; a mixing shaft which is concentric with the cylindrical channel; and a mixing blade attached to the mixing shaft, wherein the tubular flow reactor satisfy the following requirements: t<2C and t/2C<A/C?1, provided that C is a radius of the mixing shaft, t is a thickness of the mixing blade; A is a distance between a mixing blade plane B located at a forward position in a rotating direction of the mixing blade and a plane S passing through the center of the mixing shaft in a shaft direction, when plane B and plane S are parallel; and the mixing blade plane B is located at a more forward position in the rotating direction than the plane S.Type: GrantFiled: June 16, 2010Date of Patent: October 23, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasuharu Saita, Ryuji Kitani, Masashi Mamino
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Publication number: 20120235327Abstract: Disclosed are a recycled resin manufacturing process and a recycled resin, the process comprising the steps of sorting a molded waste resin product, pulverizing the sorted molded waste resin product into resin flakes, washing the resin flakes, separating the washed resin flakes to remove different kinds of resins, drying the separated resin flakes, classifying the dried resin flakes to remove foreign matter deposited on the flakes, the classifying being carried out employing a classifying apparatus comprising a classifying section and provided therein, a physical field application device having an airflow force field and another physical field other than the airflow force field, and pelletizing the classified resin flakes, wherein the recycled resin has an oligomer content of not more than 1% by mass.Type: ApplicationFiled: March 5, 2012Publication date: September 20, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasuo KURACHI, Akira OHIRA, Ryuji KITANI, Yasuharu SAITA, Masashi MAMINO
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Publication number: 20120095129Abstract: Disclosed is a resin composition comprising (A) a polyester resin or a polycarbonate resin, (B) a polyethylene resin, (C) an aromatic compound other than the polyester resin and the polycarbonate resin, the aromatic compound having a residual carbon rate of not less than 20% by mass, and (D) a flame retardant, wherein the polyethylene resin is dispersed as crystal particles in the resin composition, and the content of the polyethylene resin crystal particles having a major axis diameter of 0.1 to 10 ?m and an aspect ratio of 1 to 10 is not less than 60% by number based on the total polyethylene resin crystal particle number.Type: ApplicationFiled: October 7, 2011Publication date: April 19, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Masashi MAMINO, Yasuo KURACHI, Ryuji KITANI, Yasuharu SAITA
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Patent number: 8148477Abstract: In the present invention, a tubular flow reactor can maintain a plug flow property even though the tubular flow reactor is downsized, and provided is the tubular flow reactor with which uniform resin fine particles exhibiting a narrow particle size distribution and a narrow molecular weight distribution can be prepared when the tubular flow reactor is used for preparation of the resin fine particle via emulsion polymerization or the like. Disclosed is a tubular flow reactor possessing a stirring blade and a cylindrical channel, wherein a ratio d/D is 0.3-0.9 when a diameter of the stirring blade is represented by d and an inner diameter of the cylindrical channel is represented by D, and a ratio Lb/La is 0.80-0.99 when a length of the stirring blade is represented by Lb and a length of the cylindrical channel is represented by La.Type: GrantFiled: March 2, 2009Date of Patent: April 3, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasuharu Saita, Masashi Mamino
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Publication number: 20110040049Abstract: In the present invention, a tubular flow reactor can maintain a plug flow property even though the tubular flow reactor is downsized, and provided is the tubular flow reactor with which uniform resin fine particles exhibiting a narrow particle size distribution and a narrow molecular weight distribution can be prepared when the tubular flow reactor is used for preparation of the resin fine particle via emulsion polymerization or the like. Disclosed is a tubular flow reactor possessing a stirring blade and a cylindrical channel, wherein a ratio d/D is 0.3-0.9 when a diameter of the stirring blade is represented by d and an inner diameter of the cylindrical channel is represented by D, and a ratio Lb/La is 0.80-0.99 when a length of the stirring blade is represented by Lb and a length of the cylindrical channel is represented by La.Type: ApplicationFiled: March 2, 2009Publication date: February 17, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasuharu Saita, Masashi Mamino
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Publication number: 20100331488Abstract: Provided is a tubular flow reactor containing: a cylindrical channel; a mixing shaft which is concentric with the cylindrical channel; and a mixing blade attached to the mixing shaft, wherein the tubular flow reactor satisfy the following requirements: t<2C and t/2C<A/C?1, provided that C is a radius of the mixing shaft, t is a thickness of the mixing blade; A is a distance between a mixing blade plane B located at a forward position in a rotating direction of the mixing blade and a plane S passing through the center of the mixing shaft in a shaft direction, when plane B and plane S are parallel; and the mixing blade plane B is located at a more forward position in the rotating direction than the plane S.Type: ApplicationFiled: June 16, 2010Publication date: December 30, 2010Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasuharu SAITA, Ryuji KITANI, Masashi MAMINO
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Patent number: 7541129Abstract: An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner contains a mixture of: (i) a compound represented by Formula (3); and (ii) a compound represented by Formula (1) and/or (2), wherein R1 to R8 each represent an alkyl group having 10 to 30 carbon atoms and X represents H or —CO—R9, wherein R9 represents an alkyl group having 1-4 carbon atoms:Type: GrantFiled: February 14, 2006Date of Patent: June 2, 2009Assignee: Konica Minolta Business Machines Technologies, Inc.Inventors: Mikio Koyama, Kenji Hayashi, Kazuya Isobe, Yasuharu Saita
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Publication number: 20090036603Abstract: Disclosed is a method for continuously producing polymer resin particles, including the steps of: introducing a mixed solution of a polymerizable monomer and a chain transfer agent into an aqueous solution of a surface active agent and dispersing a resulting mixture via a mechanical dispersion apparatus to obtain an oil droplet dispersion containing oil droplets exhibiting a median size (D50) of 50 nm-500 ?m; feeding the oil droplet dispersion and a solution of a polymerization initiator into a tubular polymerization reactor; polymerizing the polymerizable monomer in the reactor to produce polymer resin particles, wherein the chain transfer agent exhibits a chain transfer constant (Cx) of 1.9-17.1, and the mixed solution of the polymerizable monomer and the polymerization initiator are continuously fed into the reactor and are kept in a plug flow condition in the reactor so as to be polymerized to produce the polymer resin particles.Type: ApplicationFiled: July 7, 2008Publication date: February 5, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasuharu Saita, Kazuya Isobe, Masashi Mamino
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Patent number: 7470496Abstract: An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner comprises a compound represented by the following Formula (1): wherein, R1, R2, R3 and R4 each independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent.Type: GrantFiled: January 26, 2006Date of Patent: December 30, 2008Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Koyama, Kenji Hayashi, Kazuya Isobe, Yasuharu Saita
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Patent number: 7445878Abstract: A toner for developing an electrostatic charge image comprising a compound represented by a following formula (1): wherein X represents H or —CO—R4; R4 represents an alkyl group having 1 to 4 carbon atoms and the alkyl group may have a substituent; R1 though R3 independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent; and R1 through R3 may be either the same or different.Type: GrantFiled: September 13, 2005Date of Patent: November 4, 2008Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Koyama, Kenji Hayashi, Kazuya Isobe, Yasuharu Saita
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Publication number: 20060172213Abstract: An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner comprises a compound represented by the following Formula (1): wherein, R1, R2, R3 and R4 each independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent.Type: ApplicationFiled: January 26, 2006Publication date: August 3, 2006Inventors: Mikio Koyama, Kenji Hayashi, Kazuya Isobe, Yasuharu Saita
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Publication number: 20060073401Abstract: A toner for developing an electrostatic charge image comprising a compound represented by a following formula (1): wherein X represents H or —CO—R4; R4 represents an alkyl group having 1 to 4 carbon atoms and the alkyl group may have a substituent; R1 though R3 independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent; and R1 through R3 may be either the same or different.Type: ApplicationFiled: September 13, 2005Publication date: April 6, 2006Inventors: Mikio Koyama, Kenji Hayashi, Kazuya Isobe, Yasuharu Saita