Patents by Inventor Meizo Shirose

Meizo Shirose 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: 8178267
    Abstract: A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 74, C.I. Pigment Yellow 139, C.I. Pigment Yellow 155, C.I. Pigment Yellow 180 and C.I.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: May 15, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Naohiro Hirose, Meizo Shirose, Kaori Soeda, Shiro Hirano, Shinya Obara
  • Patent number: 8163451
    Abstract: An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon having at least one of a branched chain structure and a cyclic structure; and the colorant comprises a silicon phthalocyanine represented by Formula (I):
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 24, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Naohiro Hirose, Meizo Shirose, Hiroyuki Yasukawa, Shiro Hirano, Tatsuya Fujisaki
  • Patent number: 8007426
    Abstract: A developing roller that can form a toner image with high quality includes: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: August 30, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Meizo Shirose, Satoshi Uchino
  • Patent number: 7817949
    Abstract: The present invention provides an intermediate transfer belt allowing formation of a high-quality toner image. The present invention relates to an intermediate transfer belt having at least one resin layer that is wound around at least a pair of supporting shafts, for receiving a toner image transferred from a photosensitive member, the resin layer comprising a carbon black dispersed in a base resin material, the carbon black having a number-average particle size of Feret's diameter of 5 to 300 nm and containing primary particles in an amount of 5% or more on a number basis.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: October 19, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Meizo Shirose, Satoshi Uchino
  • Patent number: 7741000
    Abstract: Disclosed is a method for forming color image, in which one of the yellow, magenta, cyan and black toners is a high water content toner, and one of the yellow, magenta, cyan and black toners is a toner low water content toner, water content of the high water content toner is 1.2 to 2.5% by weight based on the high water content toner, and water content of the low water content toner is 0.1 to 1.2% by weight based on the low water content toner.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: June 22, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tatsuya Nagase, Meizo Shirose, Naohiro Hirose, Asao Matsushima, Yoshiyasu Matsumoto, Shiro Hirano
  • Patent number: 7704654
    Abstract: An embodiment may be an image forming method, which comprises forming a latent image on an image carrier; developing the latent image with a toner to form a toner image on the image carrier; transferring the toner image; and applying ultrasonic vibration at one of the developing step and the transferring step. The toner comprises a resin particle and a release agent particle having a melting point in a range of 40 to 75° C. and the toner has Dp50 of 3.0 to 5.0 ?m.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 27, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroshi Yamazaki, Meizo Shirose, Masafumi Uchida
  • Patent number: 7642030
    Abstract: A toner including toner particles each containing a resin and a colorant, wherein the toner particle has: a region A which contains the colorant and a region B through which more electrons can pass than the region A; and the region A is covered by the region B being within 1 ?m deep from a circumference of the toner particle, when the toner particle is observed in a state of a microscopic segment having a thickness of 80 to 200 nm through a transmission electron microscope at an acceleration voltage of 80 kV.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: January 5, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Makoto Nomiya, Mikio Koyama, Meizo Shirose, Kenji Hayashi
  • Publication number: 20090291382
    Abstract: An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon having at least one of a branched chain structure and a cyclic structure; and the colorant comprises a silicon phthalocyanine represented by Formula (I):
    Type: Application
    Filed: May 19, 2009
    Publication date: November 26, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Naohiro HIROSE, Meizo SHIROSE, Hiroyuki YASUKAWA, Shiro HIRANO, Tatsuya FUJISAKI
  • Publication number: 20090291377
    Abstract: A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 155, C. I. Pigment Yellow 180 and C. I.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 26, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Naohiro HIROSE, Meizo Shirose, Kaori Soeda, Shiro Hirano, Shinya Obara
  • Patent number: 7582402
    Abstract: An image forming method, comprising: a step of forming a toner image on a image carrying member; and a step of transferring the toner image from the image carrying member to a transfer member, wherein toner forming the toner image has a volume-basis median diameter of 3.0 to 5.0 ?m, contains a releasing agent with a melting point in the range of from 40° C. to 75° C., and is added with a lubricant.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: September 1, 2009
    Assignee: Konica Minolta Business Technologies
    Inventors: Hiroshi Yamazaki, Meizo Shirose, Masafumi Uchida
  • Publication number: 20090116881
    Abstract: The present invention provides an intermediate transfer belt allowing formation of a high-quality toner image. The present invention relates to an intermediate transfer belt having at least one resin layer that is wound around at least a pair of supporting shafts, for receiving a toner image transferred from a photosensitive member, the resin layer comprising a carbon black dispersed in a base resin material, the carbon black having a number-average particle size of Feret's diameter of 5 to 300 nm and containing primary particles in an amount of 5% or more on a number basis.
    Type: Application
    Filed: June 29, 2005
    Publication date: May 7, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Meizo Shirose, Satoshi Uchino
  • Patent number: 7524601
    Abstract: A toner is disclosed, comprising a resin (A), a colorant (B) and an alkylidenecarboxylic acid (C).
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: April 28, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kenji Hayashi, Mikio Koyama, Meizo Shirose, Makoto Nomiya
  • Publication number: 20090087766
    Abstract: The present invention relates to a toner for developing electrostatic latent images, comprising carbon black having a number average particle size of Feret's diameter of 5 to 300 nm and containing primary particles at a content of 5% or more on a number basis. The toner of the present invention can prevent change of Q/M caused by adhesion of a carrier or a sleeve, and stable characteristics can be maintained for a long period without causing fogging or tone-flying.
    Type: Application
    Filed: June 29, 2005
    Publication date: April 2, 2009
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Meizo Shirose, Ryuji Kitani
  • Patent number: 7507514
    Abstract: Toner containing binder resin constituted of plural types of copolymers comprising a vinyl type polymerizing monomer, wherein at least one of the copolymers comprising a vinyl type polymerizing monomer is one formed by utilizing a monomer provided with at least two polar groups.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: March 24, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Tanma, Meizo Shirose, Asao Matsushima
  • Publication number: 20090035027
    Abstract: The objective of the present invention is to provide a developing roller that can form a toner image with high quality. The present invention relates to a developing roller comprising: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.
    Type: Application
    Filed: June 29, 2005
    Publication date: February 5, 2009
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Meizo Shirose, Satoshi Uchino
  • Patent number: 7482105
    Abstract: A toner for electrostatic latent image development contains a toner particle having a median diameter (d50) in number standard of 2.5 ?m to 7.5 ?m, acrylate of less than 12 ppm and aliphatic alcohol of 4 to 12 carbons of 40 ppm to 300 ppm.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: January 27, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Naohiro Hirose, Ken Ohmura, Meizo Shirose
  • Patent number: 7410742
    Abstract: An image forming method comprising: developing an electrostatic latent image on a latent image carrier with toner to form a toner image, transferring the toner image; and using ultrasonic vibration in the developing step or in the transferring step is disclosed. The toner includes toner particles that contain a releasing agent having a melting point 40-75° C., and has a number-based median diameter D50 of 3.0 to 5.0 ?m and a CV value of 12 to 20% in a number-based particle size distribution and/or a mean circularity of 0.975-1.000.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: August 12, 2008
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroshi Yamazaki, Meizo Shirose, Masafumi Uchida
  • Patent number: 7344815
    Abstract: A toner for developing an electrostatic image is disclosed. The arithmetic average of shape coefficient SF-1 of the toner particles calculated by Equation 1 is from 125 to 170 and a ratio of that to an arithmetic average of the shape coefficient SF-2 of the toner particles calculated by Equation 2, SF-1/SF-2, is from 1.10 to 1.52 and the ratio of the toner particles having a circle corresponding diameter measured by a flow particle image analyzer of from not less than 0.60 to less than 1.00 ?m is not more than 5.0% in number. The image forming methods employing the toner are also disclosed.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: March 18, 2008
    Assignee: Konica Corporation
    Inventors: Naohiro Hirose, Asao Matsushima, Meizo Shirose, Hiroshi Yamazaki
  • Patent number: 7270923
    Abstract: An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: September 18, 2007
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyasu Matsumoto, Meizo Shirose, Naohiro Hirose, Tatsuya Nagase, Asao Matsushima, Shiro Hirano
  • Patent number: 7138216
    Abstract: An image forming method comprising the step of transferring a toner image while applying vibration by ultrasonic wave where in the toner particle forming the toner image has a sea-island structure containing at least two islands of a releasing agent, and the average of the nearest distance between the islands is from approximately 100 nm to approximately 1060 nm and the number of the island having the nearest wall distance of not less than 1300 nm is not more than 10% of the whole number of the islands contained in the toner particle.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: November 21, 2006
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroshi Yamazaki, Meizo Shirose, Masafumi Uchida