Patents by Inventor Hidehiro Takano

Hidehiro Takano 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: 7149459
    Abstract: An application roller comprises inclined sections which monotonously extend from central parts of peaks to the bottom of grooves. Hence, a liquid developer (a carrier liquid and toner particles) remaining on wall surfaces of the grooves of the application roller and the like without moving to a developer roller from the application roller, due to its own gravity, moves to the bottom of the grooves while applied upon the developer roller, and stays at inner bottom parts of the grooves. This effectively prevents air from getting trapped in the grooves during carrying of the liquid developer to the grooves, and hence, permits carrying of an appropriate amount of the liquid developer.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: December 12, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Hidehiro Takano, Ken Ikuma
  • Patent number: 7125636
    Abstract: The present invention provides a toner capable of effectively controlling hot offset of a toner in fixing characteristics, while effectively preventing the winding of a recording medium round a fixing member.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: October 24, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Rie Miyazaki, Takuya Kadota, Hidehiro Takano
  • Publication number: 20060210315
    Abstract: An image forming apparatus includes a developing section in which an image is developed by using liquid toner. The liquid toner has passed through the developing section is conveyed in a first path by gravity. A tank is adapted to store a carrier liquid, and is connected to a second path in which the carrier liquid stored in the tank is conveyed by gravity and which joins the first path.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 21, 2006
    Inventors: Masahide Nakamura, Hidehiro Takano, Koichi Kamijo, Ken Ikuma
  • Patent number: 7105262
    Abstract: The invention provides a liquid developer that is used in an apparatus for forming an image by developing an electrostatic latent image formed on a latent image carrying member, transferring the developed image to a recording medium, and then fixing the image, in which the liquid developer contains a carrier liquid and particles formed with a composition containing a binder resin, a colorant, and a charge controlling agent comprising a charge controlling substance containing an ionic or neutral substance, wherein the charge controlling substance containing an ionic or neutral substance is supported by an inorganic porous material.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: September 12, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiro Takano, Tahei Ishiwatari, Takuya Kadota, Rie Miyazaki
  • Publication number: 20060099011
    Abstract: An application roller comprises inclined sections which monotonously extend from central parts of peaks to the bottom of grooves. Hence, a liquid developer (a carrier liquid and toner particles) remaining on wall surfaces of the grooves of the application roller and the like without moving to a developer roller from the application roller, due to its own gravity, moves to the bottom of the grooves while applied upon the developer roller, and stays at inner bottom parts of the grooves. This effectively prevents air from getting trapped in the grooves during carrying of the liquid developer to the grooves, and hence, permits carrying of an appropriate amount of the liquid developer.
    Type: Application
    Filed: October 26, 2005
    Publication date: May 11, 2006
    Inventors: Koichi Kamijo, Hidehiro Takano, Ken Ikuma
  • Patent number: 7018766
    Abstract: The invention provides a toner comprising a binder resin, a colorant, and a charge control agent comprising a charge control substance supported by an inorganic porous material, and having been subjected to thermal fairing treatment. Also disclosed are a toner obtained by a process comprising the steps of: kneading a composition containing a binder resin, a colorant and a charge control agent comprising an ionic or neutral substance supported by an inorganic porous material; pulverizing the kneaded product; adding the pulverized product to a solvent immiscible with water; dispersing the mixture in an aqueous medium; and removing the solvent by at least one of heating and pressure reduction, and a toner comprising associated particles formed from: primary particles obtained from an emulsion of a binder resin; a colorant; and a charge control agent comprising a water soluble charge control substance incorporated in inorganic fine particles.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: March 28, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiro Takano, Tahei Ishiwatari, Takuya Kadota, Rie Miyazaki
  • Publication number: 20060034638
    Abstract: A wire bar is formed by winding a wire, which comprises a first flat portion formed along an overall longitudinal length, around a peripheral surface of a metal core such that the peripheral surface of the metal core and the first flat portion tightly contact with each other. Since this increases the area size of a contact portion where the wire and the metal core contact each other, it is possible to increase the force of static friction which fixes the wire to the metal core. Fixing of the wound wire to the metal core by the strong force of static friction effectively prevents the wound wire from getting deviated.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 16, 2006
    Inventors: Koichi Kamijo, Hidehiro Takano, Ken Ikuma
  • Publication number: 20060034639
    Abstract: Widths of a coating area, a developing agent carrier, a maximum image area and a first cleaning member taken along a second direction are respectively W1, W2, W3 and W4, the following conditions are satisfied: a first condition that W1>W2 is met and in the second direction, the both edges of the developing agent carrier are located on the inner side to the both edges of the coating area, a second condition that W2>W3 is met and in the second direction, the both edges of the image area are located on the inner side to the both edges of the developing agent carrier, and a third condition that W4>W2 is met and in the second direction, the both edges of the developing agent carrier are located on the inner side to the both edges of the first cleaning member.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 16, 2006
    Inventors: Koichi Kamijo, Hidehiro Takano, Ken Ikuma
  • Patent number: 6994942
    Abstract: A non-magnetic single-component toner 8 of the present invention has toner mother particles 8a, and external additives 12 comprising: two hydrophobic silicas 13, 14 of which particle diameters are different from each other, i.e. a mean primary particle diameter of 7 nm to 12 nm and a mean primary particle diameter of 40 nm to 50 nm, and a hydrophobic rutile/anatase type titanium oxide 15 having a spindle shape of which major axial diameter is in a range from 0.02 nm to 0.10 nm and the ratio of the major axial diameter to the minor axial diameter is set to be 2 to 8, wherein the external additives 12 adhere to the toner mother particles 8a. By the hydrophobic silicas 13, 14 having work function smaller than the work function of the toner mother particles 8a, the negative charging property is imparted to the toner mother particles 8a and the fluidity is also insured.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: February 7, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Nobuhiro Miyakawa, Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi
  • Patent number: 6875550
    Abstract: A non-magnetic single-component toner 8 of the present invention has toner mother particles 8a, and external additives 12 comprising: two hydrophobic silicas 13, 14 of which particle diameters are different from each other, i.e. a mean primary particle diameter of 7 nm to 12 nm and a mean primary particle diameter of 40 nm to 50 nm, and a hydrophobic rutile/anatase type titanium oxide 15 having a spindle shape of which major axial diameter is in a range from 0.02 nm to 0.10 nm and the ratio of the major axial diameter to the minor axial diameter is set to be 2 to 8, wherein the external additives 12 adhere to the toner mother particles 8a. By the hydrophobic silicas 13, 14 having work function smaller than the work function of the toner mother particles 8a, the negative charging property is imparted to the toner mother particles 8a and the fluidity is also insured.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: April 5, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Nobuhiro Miyakawa, Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi
  • Publication number: 20050003293
    Abstract: The invention provides a liquid developer that is used in an apparatus for forming an image by developing an electrostatic latent image formed on a latent image carrying member, transferring the developed image to a recording medium, and then fixing the image, in which the liquid developer contains a carrier liquid and particles formed with a composition containing a binder resin, a colorant, and a charge controlling agent comprising a charge controlling substance containing an ionic or neutral substance, wherein the charge controlling substance containing an ionic or neutral substance is supported by an inorganic porous material.
    Type: Application
    Filed: January 5, 2004
    Publication date: January 6, 2005
    Inventors: Hidehiro Takano, Tahei Ishiwatari, Takuya Kadota, Rie Miyazaki
  • Publication number: 20040234881
    Abstract: A non-magnetic single-component toner 8 of the present invention has toner mother particles 8a, and external additives 12 comprising: two hydrophobic silicas 13, 14 of which particle diameters are different from each other, i.e. a mean primary particle diameter of 7 nm to 12 nm and a mean primary particle diameter of 40 nm to 50 nm, and a hydrophobic rutile/anatase type titanium oxide 15 having a spindle shape of which major axial diameter is in a range from 0.02 nm to 0.10 nm and the ratio of the major axial diameter to the minor axial diameter is set to be 2 to 8, wherein the external additives 12 adhere to the toner mother particles 8a. By the hydrophobic silicas 13, 14 having work function smaller than the work function of the toner mother particles 8a, the negative charging property is imparted to the toner mother particles 8a and the fluidity is also insured.
    Type: Application
    Filed: May 13, 2004
    Publication date: November 25, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Nobuhiro Miyakawa, Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi
  • Publication number: 20040234878
    Abstract: The present invention provides a toner capable of effectively controlling hot offset of a toner in fixing characteristics, while effectively preventing the winding of a recording medium round a fixing member.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 25, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Rie Miyazaki, Takuya Kadota, Hidehiro Takano
  • Publication number: 20040229149
    Abstract: The present invention provides a toner which can properly ensure elasticity and viscosity after transiting fixing nip, can improve surface smoothness of the fixing surface, fixing strength of a toner and transparency, low temperature fixing ability, and can prevent fattening of characters by using dynamic viscoelastic characteristics more conformable for actual toner behavior in fixation by heating, further provides an image-forming apparatus capable of forming a high quality image while enhancing low temperature fixing ability, realizing oil-less fixation and preventing offset of a toner.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 18, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takuya Kadota, Hidehiro Takano, Rie Miyazaki
  • Publication number: 20040229150
    Abstract: The present invention provides a toner capable of effectively controlling hot offset of a toner in fixing characteristics, while effectively preventing the winding of a recording medium round a fixing member.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 18, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Rie Miyazaki, Takuya Kadota, Hidehiro Takano
  • Publication number: 20040229148
    Abstract: The present invention provides a toner which can properly ensure elasticity and viscosity after transiting fixing nip, can improve surface smoothness of the fixing surface, fixing strength of a toner and transparency, low temperature fixing ability and offset resistance of a toner, and can prevent fattening of characters by using dynamic viscoelastic characteristics more conformable for actual toner behavior in fixation by heating, further provides an image-forming apparatus capable of forming a high quality image while enhancing low temperature fixing ability, realizing oil-less fixation and preventing offset of a toner.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 18, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takuya Kadota, Hidehiro Takano, Rie Miyazaki
  • Publication number: 20040143036
    Abstract: The invention provides a toner comprising a binder resin, a colorant, and a charge control agent comprising a charge control substance supported by an inorganic porous material, and having been subjected to thermal fairing treatment. Also disclosed are a toner obtained by a process comprising the steps of: kneading a composition containing a binder resin, a colorant and a charge control agent comprising an ionic or neutral substance supported by an inorganic porous material; pulverizing the kneaded product; adding the pulverized product to a solvent immiscible with water; dispersing the mixture in an aqueous medium; and removing the solvent by at least one of heating and pressure reduction, and a toner comprising associated particles formed from: primary particles obtained from an emulsion of a binder resin; a colorant; and a charge control agent comprising a water soluble charge control substance incorporated in inorganic fine particles.
    Type: Application
    Filed: November 6, 2003
    Publication date: July 22, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidehiro Takano, Tahei Ishiwatari, Takuya Kadota, Rie Miyazaki
  • Publication number: 20030157419
    Abstract: A non-magnetic single-component toner 8 of the present invention has toner mother particles 8a, and external additives 12 comprising: two hydrophobic silicas 13, 14 of which particle diameters are different from each other, i.e. a mean primary particle diameter of 7 nm to 12 nm and a mean primary particle diameter of 40 nm to 50 nm, and a hydrophobic rutile/anatase type titanium oxide 15 having a spindle shape of which major axial diameter is in a range from 0.02 nm to 0.10 nm and the ratio of the major axial diameter to the minor axial diameter is set to be 2 to 8, wherein the external additives 12 adhere to the toner mother particles 8a. By the hydrophobic silicas 13, 14 having work function smaller than the work function of the toner mother particles 8a, the negative charging property is imparted to the toner mother particles 8a and the fluidity is also insured.
    Type: Application
    Filed: July 10, 2002
    Publication date: August 21, 2003
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Nobuhiro Miyakawa, Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi
  • Patent number: 5458424
    Abstract: A serial printer for preventing the coil of a print head from being burned, by detecting the temperature of the print head to switch the printing mode of the print mode from a bidirectional mode to a split mode in accordance with the detected temperature. This serial printer comprises: a print head bidirectionally movable for printing line by line according to print data; temperature detecting means for detecting the temperature of the print head; print data density discriminating means for discriminating whether the print data of one line of the print data inputted have high density or low density; and print control means for switching the printing mode of the print head from a bidirectional printing mode to a split mode, in which one line is printed separately by at least two times, when it is determined that the print data of the one line is of high density and that the detected value of the temperature detecting means exceeds a predetermined value.
    Type: Grant
    Filed: September 28, 1993
    Date of Patent: October 17, 1995
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yukihisa Kato, Hidehiro Takano