Patents by Inventor Kenji Karashima

Kenji Karashima 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: 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
  • Patent number: 9851681
    Abstract: An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: December 26, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino
  • 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: 20170146943
    Abstract: An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.
    Type: Application
    Filed: February 7, 2017
    Publication date: May 25, 2017
    Inventors: Yoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino
  • Patent number: 9588465
    Abstract: An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: March 7, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino
  • Patent number: 9547272
    Abstract: To provide a cleaning blade having an elastic body portion containing urethane rubber and a support member supporting the elastic body portion. A free end portion of the elastic body has a first region in which the Young's modulus gradually decreases in the depth direction from the principal surface facing the surface of the member to be cleaned on the edge face side and a second region in which the Young's modulus does not vary in the depth direction from the principal surface on the side closer to the support member relative to the first region.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: January 17, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shingo Ito, Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe
  • Patent number: 9541887
    Abstract: A cleaning blade includes an image region and a non-image region in which Young's moduli at positions separated by a distance of L ?m from an edge portion in contact with an photosensitive drum are respectively defined as YL and Y?L, Y0 and Y?0 are 10 mgf/?m2 or more and 400 mgf/?m2 or less, Y50/Y0 is 0.5 or less, [{(Y0?Y20)/Y0}/(20?0)] is equal to or more than [{(Y20?Y50)/Y0}/(50?20)] and, the Young's modulus Y50 ?the Young's modulus Y?L where L satisfies 0?L ?100 ?m.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: January 10, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanobu Nakajima, Norihiko Kubo, Hisataka Hisakuni, Masaya Kawada, Kenji Karashima
  • Patent number: 9501000
    Abstract: The present invention relates to an image forming apparatus that forms an image by consecutively superposing toner images that have been formed on a plurality of photosensitive drums, on an intermediate transfer member or a transfer medium. The image forming apparatus is made compact and operates at a low cost. Since a current supply member supplies a current in a rotational direction of an intermediate transfer belt, multiple first transfer portions do not need corresponding voltage sources. Even in the case where a charging member supplies a current, the potential of the intermediate transfer belt is maintained at a predetermined potential by a constant-voltage element connected to support rollers.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: November 22, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Karashima, Satoshi Tsuruya, Yoshikuni Ito, Yasuhiro Horiguchi, Takeshi Fujino, Takahiro Kawamoto, Takayuki Tanaka, Osamu Iwasaki, Kazunari Hagiwara
  • Publication number: 20160124376
    Abstract: To provide a cleaning blade having an elastic body portion containing urethane rubber and a support member supporting the elastic body portion. A free end portion of the elastic body has a first region in which the Young's modulus gradually decreases in the depth direction from the principal surface facing the surface of the member to be cleaned on the edge face side and a second region in which the Young's modulus does not vary in the depth direction from the principal surface on the side closer to the support member relative to the first region.
    Type: Application
    Filed: October 27, 2015
    Publication date: May 5, 2016
    Inventors: Shingo Ito, Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe
  • Publication number: 20160124375
    Abstract: A cleaning blade includes an image region and a non-image region in which Young's moduli at positions separated by a distance of L ?m from an edge portion in contact with an photosensitive drum are respectively defined as YL and Y?L, Y0 and Y?0 are 10 mgf/?m2 or more and 400 mgf/?m2 or less, Y50/Y0 is 0.5 or less, [{(Y0?Y20)/Y0}/(20?0)] is equal to or more than [{(Y20?Y50)/Y0}/(50?20)] and, the Young's modulus Y50 the Young's modulus Y?L where L satisfies 0?L?100 ?m.
    Type: Application
    Filed: October 23, 2015
    Publication date: May 5, 2016
    Inventors: Masanobu Nakajima, Norihiko Kubo, Hisataka Hisakuni, Masaya Kawada, Kenji Karashima
  • Publication number: 20160097994
    Abstract: An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.
    Type: Application
    Filed: December 15, 2015
    Publication date: April 7, 2016
    Inventors: Yoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino
  • Publication number: 20160070194
    Abstract: The present invention relates to an image forming apparatus that forms an image by consecutively superposing toner images that have been formed on a plurality of photosensitive drums, on an intermediate transfer member or a transfer medium. The image forming apparatus is made compact and operates at a low cost. Since a current supply member supplies a current in a rotational direction of an intermediate transfer belt, multiple first transfer portions do not need corresponding voltage sources. Even in the case where a charging member supplies a current, the potential of the intermediate transfer belt is maintained at a predetermined potential by a constant-voltage element connected to support rollers.
    Type: Application
    Filed: November 13, 2015
    Publication date: March 10, 2016
    Inventors: Kenji Karashima, Satoshi Tsuruya, Yoshikuni Ito, Yasuhiro Horiguchi, Takeshi Fujino, Takahiro Kawamoto, Takayuki Tanaka, Osamu Iwasaki, Kazunari Hagiwara
  • Patent number: 9229400
    Abstract: An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino
  • Patent number: 9217962
    Abstract: The present invention relates to an image forming apparatus that forms an image by consecutively superposing toner images that have been formed on a plurality of photosensitive drums, on an intermediate transfer member or a transfer medium. The image forming apparatus is made compact and operates at a low cost. Since a current supply member supplies a current in a rotational direction of an intermediate transfer belt, multiple first transfer portions do not need corresponding voltage sources. Even in the case where a charging member supplies a current, the potential of the intermediate transfer belt is maintained at a predetermined potential by a constant-voltage element connected to support rollers.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: December 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Karashima, Satoshi Tsuruya, Yoshikuni Ito, Yasuhiro Horiguchi, Takeshi Fujino, Takahiro Kawamoto, Takayuki Tanaka, Osamu Iwasaki, Kazunari Hagiwara
  • Patent number: 9170556
    Abstract: A urethane rubber cleaning blade, wherein a surface of a contact portion of the cleaning blade that comes into contact with a member to be cleaned has a Young's modulus (Y0) of 10 mgf/?m2 or more and 400 mgf/?m2 or less, the ratio (Y50/Y0) of the Young's modulus (Y50) of an internal portion of the cleaning blade 50 ?m spaced apart from the surface of the contact portion to the Young's modulus (Y0) is 0.5 or less, and the average rate of change in Young's modulus from the surface to an internal portion of the cleaning blade 20 ?m spaced apart from the surface is greater than or equal to the average rate of change in Young's modulus from the internal portion of the cleaning blade 20 ?m spaced apart from the surface to an internal portion of the cleaning blade 50 ?m spaced apart from the surface.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: October 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe, Shingo Ito
  • Publication number: 20140321891
    Abstract: The present invention relates to an image forming apparatus that forms an image by consecutively superposing toner images that have been formed on a plurality of photosensitive drums, on an intermediate transfer member or a transfer medium. The image forming apparatus is made compact and operates at a low cost. Since a current supply member supplies a current in a rotational direction of an intermediate transfer belt, multiple first transfer portions do not need corresponding voltage sources. Even in the case where a charging member supplies a current, the potential of the intermediate transfer belt is maintained at a predetermined potential by a constant-voltage element connected to support rollers.
    Type: Application
    Filed: December 9, 2011
    Publication date: October 30, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kenji Karashima, Satoshi Tsuruya, Yoshikuni Ito, Yasuhiro Horiguchi, Takeshi Fujino, Takahiro Kawamoto, Takayuki Tanaka, Osamu Iwasaki, Kazunari Hagiwara
  • Publication number: 20140321880
    Abstract: A urethane rubber cleaning blade, wherein a surface of a contact portion of the cleaning blade that comes into contact with a member to be cleaned has a Young's modulus (Y0) of 10 mgf/?m2 or more and 400 mgf/?m2 or less, the ratio (Y50/Y0) of the Young's modulus (Y50) of an internal portion of the cleaning blade 50 ?m spaced apart from the surface of the contact portion to the Young's modulus (Y0) is 0.5 or less, and the average rate of change in Young's modulus from the surface to an internal portion of the cleaning blade 20 ?m spaced apart from the surface is greater than or equal to the average rate of change in Young's modulus from the internal portion of the cleaning blade 20 ?m spaced apart from the surface to an internal portion of the cleaning blade 50 ?m spaced apart from the surface.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 30, 2014
    Inventors: Kenji Karashima, Masaya Kawada, Tomohiro Tanoue, Masahiro Watabe, Shingo Ito