Patents by Inventor Tatsuya Tada

Tatsuya Tada 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: 11052609
    Abstract: A molding system to manufacture a three-dimensional object corresponding to a three-dimensional model. The molding apparatus includes a slice data generation unit to generate slice data from three-dimensional shape data of the three-dimensional model, and a lamination unit to laminate a layer of a molding material on the basis of the slice data. The slice data generation unit analyzes data, and, if a region in which a layer of a second molding material different from a first molding material is to be laminated on a layer of the first molding material and in which it is difficult to laminate the layers is extracted, modifies the data of a region of at least one of an ith layer and an (i+1)th layer to data in which a portion in which the first molding material is disposed and a portion in which the second molding material is disposed.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 6, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirokazu Usami, Tatsuya Tada, Kenji Karashima, Genya Anan, Takashi Kase, Satoru Yamanaka, Yuji Wakabayashi
  • Patent number: 10695988
    Abstract: A method of producing a three-dimensional shaped article includes a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack by melting and stacking the particle layers, and a step of removing the material having higher solubility in the fluid than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the fluid than the material for forming the shaped article in the fluid.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 30, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yukio Hanyu, Akira Sugiyama, Naotake Sato, Tatsuya Tada, Satoru Yamanaka
  • Publication number: 20190315052
    Abstract: A method of producing a three-dimensional shaped article includes a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack by melting and stacking the particle layers, and a step of removing the material having higher solubility in the fluid than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the fluid than the material for forming the shaped article in the fluid.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Yukio Hanyu, Akira Sugiyama, Naotake Sato, Tatsuya Tada, Satoru Yamanaka
  • Patent number: 10357956
    Abstract: A shaping apparatus includes a storage section that stores in advance a first relationship between a temperature of a shaping material and a heating time at a time at which oxidation of the shaping material starts as the shaping material is heated; and a control section that estimates a timing at which the oxidation of a material layer starts, based on an acquisition result from a temperature acquisition section, a measurement result from a time measurement section, and the first relationship stored in the storage section when the material layer on a conveyance body is preheated by a preheating section, and reduces a front surface temperature of the material layer on the conveyance body before the oxidation of the material layer starts.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: July 23, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirokazu Usami, Tatsuya Tada, Kenji Karashima, Genya Anan, Takashi Kase, Satoru Yamanaka, Yuji Wakabayashi
  • Publication number: 20190056688
    Abstract: Occurrence of layering defects is suppressed in a layering forming method where material layers on a conveyance member are heated and layered. A forming apparatus 1 configured to sequentially layer a plurality of material layers and form a three-dimensional object includes a stage having a forming face on which the material layers are layered, a conveyance member configured to support and convey the material layers to a layering position facing the forming face, and a heating member configured to nip the material layers between itself and the forming face of the stage at the layering position, and pressurize and heat the material layer. When a heating region of the heating member is perpendicularly projected onto a plane where a supporting face at which the conveyance member supports the material layer exists, a projection plane of the heating region has extending regions that extend further to the outer side from both edges of the supporting face, on both edges of the projection plane of the heating region.
    Type: Application
    Filed: October 23, 2018
    Publication date: February 21, 2019
    Inventors: Yuji Wakabayashi, Tatsuya Tada, Hirokazu Usami, Kenji Karashima, Genya Anan, Takashi Kase, Satoru Yamanaka
  • Publication number: 20190001578
    Abstract: A molding system to manufacture a three-dimensional object corresponding to a three-dimensional model. The molding apparatus includes a slice data generation unit to generate slice data from three-dimensional shape data of the three-dimensional model, and a lamination unit to laminate a layer of a molding material on the basis of the slice data. The slice data generation unit analyzes data, and, if a region in which a layer of a second molding material different from a first molding material is to be laminated on a layer of the first molding material and in which it is difficult to laminate the layers is extracted, modifies the data of a region of at least one of an ith layer and an (i+1)th layer to data in which a portion in which the first molding material is disposed and a portion in which the second molding material is disposed.
    Type: Application
    Filed: December 16, 2016
    Publication date: January 3, 2019
    Inventors: Hirokazu Usami, Tatsuya Tada, Kenji Karashima, Genya Anan, Takashi Kase, Satoru Yamanaka, Yuji Wakabayashi
  • Publication number: 20170232673
    Abstract: A shaping apparatus includes a storage section that stores in advance a first relationship between a temperature of a shaping material and a heating time at a time at which oxidation of the shaping material starts as the shaping material is heated; and a control section that estimates a timing at which the oxidation of a material layer starts, based on an acquisition result from a temperature acquisition section, a measurement result from a time measurement section, and the first relationship stored in the storage section when the material layer on a conveyance body is preheated by a preheating section, and reduces a front surface temperature of the material layer on the conveyance body before the oxidation of the material layer starts.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 17, 2017
    Inventors: Hirokazu Usami, Tatsuya Tada, Kenji Karashima, Genya Anan, Takashi Kase, Satoru Yamanaka, Yuji Wakabayashi
  • Publication number: 20170015063
    Abstract: A method of producing a three-dimensional shaped article includes a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack by melting and stacking the particle layers, and a step of removing the material having higher solubility in the fluid than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the fluid than the material for forming the shaped article in the fluid.
    Type: Application
    Filed: March 3, 2015
    Publication date: January 19, 2017
    Inventors: Yukio Hanyu, Akira Sugiyama, Naotake Sato, Tatsuya Tada, Satoru Yamanaka
  • Patent number: 9454103
    Abstract: A developing device includes a developing member and a carrier collecting member. An outer surface of the developing member includes a plurality of protrusion portions aligned at regular intervals that are equal to or larger than an average particle diameter of toner particles and smaller than an average particle diameter of magnetic carrier particles. Each protrusion portion has a first face formed at one side of an apex of each protrusion portion and a second face formed at the other side of the apex, and an inclination angle of the first face is less than an inclination angle of the second face. In the circumferential direction of the developing member, when a downward direction of the first face is set to be positive, a relative velocity of a surface velocity of an image bearing member to a surface velocity of the developing member is set to be positive.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: September 27, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Tomohito Ishida, Shunichi Takada, Koichi Hashimoto, Tatsuya Tada
  • Patent number: 9372439
    Abstract: A developing device includes a developing member, a toner supplying member, and a carrier recovering member configured to recover magnetic carrier particles from the toner supplying member. An outer surface of the toner supplying member includes a plurality of protrusion portions with a regular interval between adjacent protrusion portions. The regular interval is equal to or larger than a particle diameter of a toner particle having an average particle diameter from among the particle diameters of the toner particles and smaller than a carrier particle diameter of a magnetic carrier particle having an average particle diameter from among the particle diameters of the magnetic carrier particles. The protrusion portions protrude from the remainder of the outer surface of the toner supplying member with a height that is smaller than the average particle diameter of the toner particles.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: June 21, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Tatsuya Tada, Satoru Yamanaka, Hideaki Okamoto
  • Patent number: 9366988
    Abstract: A developing device configured to develop an electrostatic image includes a developing member and a carrier recovering member. An outer surface of the developing member includes a plurality of protrusion portions which extend in a direction intersecting a toner particle carrying direction and are aligned with a regular interval between adjacent protrusion portions. The regular interval is equal to or larger than a particle diameter of a toner particle having an average particle diameter from among the toner particles and smaller than a carrier particle diameter of a magnetic carrier particle having an average particle diameter from among the magnetic carrier particles. The protrusion portions protrude from the outer surface of the developing member with a height that is smaller than the average particle diameter of the toner particles, and the developing member contacts with the image bearing member at a developing portion.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: June 14, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Hideaki Okamoto, Satoru Yamanaka, Tatsuya Tada
  • Publication number: 20150227078
    Abstract: Provided is a developing device including a toner carrying member which carries a toner, a toner supplying member which transports the toner to the toner carrying member, wherein an outer layer surface of the toner supplying member includes a plurality of protrusion portions which extend in a direction intersecting a toner transporting direction, an aperture width in the toner transporting direction between the adjacent protrusion portions is equal to or larger than a particle diameter of the toner and smaller than a particle diameter of the carrier, and a height of the protrusion portions is equal to or smaller than the particle diameter of the toner, and wherein the toner supplying member and the toner carrying member are movable so as to have a relative velocity difference in a toner supplying portion where the toner is supplied from the toner supplying member to the toner carrying member.
    Type: Application
    Filed: February 4, 2015
    Publication date: August 13, 2015
    Inventors: Kenta Kubo, Tatsuya Tada, Satoru Yamanaka, Hideaki Okamoto
  • Publication number: 20150227077
    Abstract: A toner bearing member has a plurality of convex portions formed on the surface thereof and extended in a direction crossing a developer carrying direction. An opening width between the adjacent convex portions in the developer carrying direction is equal to or greater than a particle diameter of a toner and less than a particle diameter of a carrier. The convex portion has a height equal to or less than the particle diameter of the toner 11. At a developing portion at which the toner bearing member and an image bearing member face each other to develop an electrostatic image, the toner bearing member and the image bearing member are moved so as to have a relative velocity difference.
    Type: Application
    Filed: January 15, 2015
    Publication date: August 13, 2015
    Inventors: Kenta Kubo, Hideaki Okamoto, Satoru Yamanaka, Tatsuya Tada
  • Publication number: 20150227087
    Abstract: An image forming apparatus includes: a developing container; a concave-convex member which has a plurality of grooves formed in a rotation direction; a collecting portion; and a receiving member, wherein each groove has side surfaces including a first side surface formed in one direction and a second side surface formed in the other direction in a circumferential direction of the concave-convex member, wherein the first side surface has a smaller inclination angle than the second side surface, and when a direction which moves down the first side surface in the circumferential direction of the concave-convex member is set to be positive, a relative velocity of a surface velocity of the concave-convex member to a surface velocity of the receiving member is set to be positive, at a position in which the concave-convex member and the receiving member come into contact with each other.
    Type: Application
    Filed: February 3, 2015
    Publication date: August 13, 2015
    Inventors: Kenta Kubo, Tomohito Ishida, Shunichi Takada, Koichi Hashimoto, Tatsuya Tada
  • Patent number: 9104142
    Abstract: The developing device includes a developing container that stores a developer including a non-magnetic toner and a magnetic carrier, a toner bearing member that bears the toner and conveys the toner to a developing portion and a separating portion wherein a surface of the toner bearing member includes a plurality of recess structures. A percentage of the recess structures per unit area in a toner bearing region of the toner bearing member is equal to or larger than 55%.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: August 11, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Tatsuya Tada, Satoru Yamanaka, Hideaki Okamoto
  • Publication number: 20140161493
    Abstract: The developing device includes: a developing container that stores a developer including a non-magnetic toner and a magnetic carrier; a toner bearing member that bears the toner and conveys the toner to a developing portion; and a separating portion wherein a surface of the toner bearing member includes a plurality of recess structures in which a smallest opening width R is equal to or larger than rt10 and equal to or smaller than rc10, and a depth D is equal to or larger than rt10/2, where rt10 is a particle diameter in which an accumulated number distribution in a toner granularity distribution is 10%, and rc10 is a particle diameter in which an accumulated number distribution in a carrier granularity distribution is 10%; and a percentage of the recess structures per unit area in a toner bearing region of the toner bearing member is equal to or larger than 55%.
    Type: Application
    Filed: December 5, 2013
    Publication date: June 12, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Tatsuya Tada, Satoru Yamanaka, Hideaki Okamoto
  • Patent number: 5781836
    Abstract: A developing device for an image forming apparatus such as a copying machine, a printer, or the like to develop an electrostatic latent image on an image carrier includes a toner carrier which moves while carrying a toner on its surface, and a regulating member for regulating the amount of toner on the toner carrier by applying a moving force to the toner in a direction opposite to the moving direction of the toner carrier. In a regulating portion defined by the regulating member, a convey force received by a toner portion, which does not contact the surface of the toner carrier, from the regulating member is larger than a convey force received from the toner carrier.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: July 14, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Tada, Isami Itoh
  • Patent number: 5754929
    Abstract: A development apparatus having a development sleeve for carrying and transporting a magnetic developer, a regulating roll for controlling the thickness of a layer of the developer on the development sleeve, a first magnetic pole provided in the development sleeve in the vicinity of a position of layer thickness control by the regulating roll, a second magnetic pole provided in the regulating roll to form a magnetic field for restraining the developer in cooperation with the first magnetic pole. The first and second magnetic poles are provided on the upstream side of a straight line connecting a center of the development sleeve and a center of the regulating roll in the direction of transport of the developer by the development sleeve so that the following inequalities are satisfied:0<.theta..ltoreq..alpha./2, , 0.ltoreq.r.multidot.sin .phi.<R.multidot.sin .theta.where .alpha. is an angle of a half-value width of a magnetic flux density distribution of the first magnetic pole; .theta.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: May 19, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Nonomura, Tatsuya Tada, Isami Itoh, Takeshi Yamamoto
  • Patent number: 5523533
    Abstract: A developing device including a developing agent container for storing a developing agent composed of toner particles and magnetic carrier particles, a toner carrier for carrying and conveying the toner particles to supply the toner particles to an image carrier for carrying an electrostatic image, and a developing agent regulating rotary member, disposed adjacent the toner carrier with a gap therebetween, for forming a brush of the magnetic carrier particles by a magnetic force between itself and the toner carrier. The regulating rotary member allows only the toner to pass therethrough without substantially allowing passage of the carrier.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: June 4, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isami Itoh, Tatsuya Tada
  • Patent number: RE38026
    Abstract: A developing device for an image forming apparatus such as a copying machine, a printer, or the like to develop an electrostatic latent image on an image carrier includes a toner carrier which moves while carrying a toner on its surface, and a regulating member for regulating the amount of toner on the toner carrier by applying a moving force to the toner in a direction opposite to the moving direction of the toner carrier. In a regulating portion defined by the regulating member, a convey force received by a toner portion, which does not contact the surface of the toner carrier, from the regulating member is larger than a convey force received from the toner carrier.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: March 11, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Tada, Isami Itoh