Patents by Inventor Tsunenori Ashibe

Tsunenori Ashibe 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).

  • Publication number: 20200299505
    Abstract: The invention provides a resin composition containing a resin, a carbon fiber and a conductive liquid, wherein the content of the resin is 47 to 94.9% by mass in the composition, the content of the carbon fiber is 5 to 50% by mass in the composition, and the content of the conductive liquid is 0.1 to 3% by mass in the composition, and wherein the concentration of an element contained in the conductive liquid as measured by SEM-EDS on the surface of the carbon fiber is 1.3 times or more as much as the concentration of the element contained in the resin.
    Type: Application
    Filed: December 8, 2016
    Publication date: September 24, 2020
    Applicant: Canon Kabushiki Kaisha
    Inventor: Tsunenori ASHIBE
  • Publication number: 20200184861
    Abstract: A display device includes a laser irradiation device and a control device. The laser irradiation device is configured to irradiate an irradiation point located at a display position in air, with a laser beam having a wavelength equal to or larger than 380 nm and equal to or smaller than 780 nm and produce plasma at the display position. The control device is configured to control intensity of the laser beam emitted from the at least one laser irradiation device so that a relationship between intensity of plasma light emitted from the plasma at the display position and intensity of scattered light produced from the laser beam and scattered by the plasma becomes a predetermined relationship to display a color pixel.
    Type: Application
    Filed: November 15, 2019
    Publication date: June 11, 2020
    Inventors: Tsunenori Ashibe, Hidehiko Fujimura, Katsuhiro Watanabe, Hiroyuki Morimoto, Shunsuke Kuboyama, Toshiji Nishiguchi
  • Publication number: 20160070182
    Abstract: There is provided an electro-conductive member for electrophotography. The electro-conductive member for electrophotography includes, in sequence, an electro-conductive base, an electro-conductive elastic layer, and a resin layer. The elastic layer contains a cured product of an addition-curable silicone rubber mixture having a specific composition. The addition-curable silicone rubber mixture contains an organopolysiloxane that contains an alkenyl group attached to a silicon atom in its molecule, an organopolysiloxane that contains a hydrogen atom attached to a silicon atom in its molecule, carbon black, and spherical solid inorganic particles.
    Type: Application
    Filed: September 1, 2015
    Publication date: March 10, 2016
    Inventors: Takanori Kaihara, Masashi Uno, Masaki Yamada, Tsunenori Ashibe
  • Publication number: 20090052954
    Abstract: The object of the present invention is to provide an electrophotographic endless belt exhibiting high uniformity in transfer and high stability in running, and an electrophotographic apparatus having the electrophotographic endless belt. The present invention provides: an electrophotographic endless belt formed of a thermoplastic resin composition, characterized in that, assuming that the maximum heating shrinkage factor when a slice of the electrophotographic endless belt is hot-pressed in a temperature range higher than a melting point of the thermoplastic resin composition by 10° C. to 120° C. is L (%), 15?L?80 is established, and assuming that the maximum tensile rupture distortion attained by performing a heating tensile test using a slice hot-pressed at a temperature giving the maximum heating shrinkage factor in a temperature range of 80° C. to 200° C. is S, 0.10?(S+1)/L?0.
    Type: Application
    Filed: December 12, 2005
    Publication date: February 26, 2009
    Inventors: Ryota Kashiwabara, Tsunenori Ashibe
  • Patent number: 7320822
    Abstract: In an electrophotographic conductive member composed of at least a thermoplastic resin composition, the thermoplastic resin composition contains a thermoplastic resin, a conductive filler and a conductive-filler dispersing agent, and the conductive-filler dispersing agent is a polyhydric alcohol type nonionic surface-active agent.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: January 22, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsunenori Ashibe, Ryota Kashiwabara
  • Patent number: 7208211
    Abstract: In an electrophotographic belt member comprising a resin composition, the resin composition contains from 30% by weight to 90% by weight of a thermoplastic resin, from 2% by weight to 30% by weight of a compound selected from the group consisting of a polyether-ester amide, a polyether ester and a polyether amide, from 0% by weight to 5% by weight of an electrolyte, and from 2% by weight to 50% by weight of an insulating filler. Also disclosed are a process for producing the electrophotographic belt member, and an electrophotographic apparatus having the electrophotographic belt member.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: April 24, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Tanaka, Akihiko Nakazawa, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Publication number: 20070014943
    Abstract: A process is disclosed producing an intermediate transfer member used in an image-forming apparatus in which an image formed on a first image-bearing member is transferred to a second image-bearing member. The process has the steps of melt-extruding an extrusion material from a circular die by means of an extruder and thereafter making the same into a desired shape to obtain a cylindrical extruded product, and forming the resultant cylindrical extruded product into the intermediate transfer member. The cylindrical extruded product contains a thermoplastic resin and an ion-conductive resistance control agent, and a ratio of the diameter of the intermediate transfer member obtained to the die diameter of the circular die is from 0.5 to 4.0. Also disclosed are an intermediate transfer member obtained by the production process, and an intermediate transfer member having the intermediate transfer member.
    Type: Application
    Filed: September 19, 2006
    Publication date: January 18, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Minoru Shimojo, Hiroyuki Kobayashi, Akihiko Nakazawa, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Publication number: 20060151907
    Abstract: A method of manufacturing an electrophotographic seamless belt, includes setting a substantially cylindrical preform made of a thermoplastic resin mixture containing a thermoplastic resin and having an outer diameter “a”, in a seamless belt molding die including a cylindrical cavity having an inner diameter “b”, and stretch blow molding at a predetermined stretch temperature T1 to obtain a stretch-blow-molded part; and cutting the stretch-blow-molded part to obtain a seamless belt. The thermoplastic resin mixture has a temperature T2 at which a parameter S/P calculated from a tensile-stress to strain curve obtained by performing a JIS K7161 test on a sheet test piece made of the thermoplastic resin mixture is 2.0 to 15.0 T2 is set as the predetermined stretch temperature T1. P indicates stress when a stretch magnification is 0.6×(b/a) and S indicates stress when the stretch magnification is 1.6×(b/a) and (b/a)?1.7.
    Type: Application
    Filed: December 23, 2005
    Publication date: July 13, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryota Kashiwabara, Hiroyuki Kobayashi, Tsunenori Ashibe
  • Patent number: 6928256
    Abstract: An electrophotographic endless belt has a beltlike substrate and a meandering-preventive member attached to the inner peripheral surface of the beltlike substrate via a pressure-sensitive adhesive, double-coated tape. The pressure-sensitive adhesive, double-coated tape is a pressure-sensitive adhesive, double-coated tape having i) a reinforcing base material and ii) pressure-sensitive adhesive layers on both sides of the reinforcing base material. The reinforcing base material has a thickness of from 25 ?m or more to 200 ?m or less, and the pressure-sensitive adhesive layers on both sides each have a thickness of 200 ?m or less and at least one of the pressure-sensitive adhesive layers has a thickness of from more than 100 ?m to 200 ?m or less, and the meandering-preventive member has a hardness of from 15° or more to 70° or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic endless belt as an intermediate transfer belt.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: August 9, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidekazu Matsuda, Akihiko Nakazawa, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba
  • Publication number: 20050118421
    Abstract: In an electrophotographic conductive member composed of at least a thermoplastic resin composition, the thermoplastic resin composition contains a thermoplastic resin, a conductive filler and a conductive-filler dispersing agent, and the conductive-filler dispersing agent is a polyhydric alcohol type nonionic surface-active agent.
    Type: Application
    Filed: November 24, 2004
    Publication date: June 2, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsunenori Ashibe, Ryota Kashiwabara
  • Patent number: 6856776
    Abstract: An electrophotographic endless belt has a belt-like substrate, and a meandering-preventive member for preventing the electrophotographic endless belt from meandering and a position detection member for detecting a prescribed position of the electrophotographic endless belt. The meandering preventive member is, disposed on the inner-periphery side of one end portion of the belt-like substrate, and the position detection member is disposed on the outer-periphery side of the other end portion of the belt-like substrate. The meandering-preventive member and the position detection member are kept apart by a distance of from 200 mm to 250 mm in the width direction of the electrophotographic endless belt. A process cartridge and an electrophotographic apparatus employ such an electrophotographic endless belt as an intermediate transfer belt.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: February 15, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidekazu Matsuda, Hiroyuki Kobayashi, Akihiko Nakazwa, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Ryota Kashiwabara, Yuji Sakurai
  • Patent number: 6853824
    Abstract: In an electrophotographic endless belt having a beltlike substrate, a meandering-preventive member and a position detection member, the meandering-preventive member is disposed on the inner-periphery side of one end portion of the beltlike substrate, the position detection member is disposed on the outer-periphery side of the other end portion of the beltlike substrate, and the meandering-preventive member and the position detection member are 200 mm to 250 mm away from each other in the width direction of the electrophotographic endless belt. The beltlike substrate contains a thermoplastic resin as a binder resin, and the beltlike substrate has a 25 ?m×25 ?m surface total current value of from 300 nA to 2,000 nA at the time of application of 100 V as measured by SPM.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: February 8, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryota Kashiwabara, Hiroyuki Kobayashi, Akihiko Nakazawa, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda, Yuji Sakurai
  • Patent number: 6852400
    Abstract: An endless belt for electrophotography is disclosed which is obtainable continuously by melt extrusion from a circular die. The endless belt has a layer containing a thermoplastic resin having a diphenyl sulfone structure represented by the following Formula (1) Also disclosed are a process for producing the endless belt and an image forming apparatus having the endless belt.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: February 8, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Nakazawa, Hiroyuki Kobayashi, Minoru Shimojo, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Patent number: 6795667
    Abstract: A process cartridge which is detachably mountable to a main body of an electrophotographic apparatus, includes an electrophotographic photosensitive member to carry a toner image; an intermediate transfer belt having a contact part with the photosensitive member, and a primary transfer unit to primarily transfer the toner image at the contact part from the photosensitive member to the intermediate transfer belt, being integrally supported in one body. After the contact part is formed by the photosensitive member and the intermediate transfer belt is brought into contact with under a linear pressure of 0.5 N/cm and is left for 10 hours in an environment of 45° C.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: September 21, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Nakazawa, Hiroyuki Kobayashi, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda, Yuji Sakurai
  • Patent number: 6775494
    Abstract: A process cartridge integrally supports therein a cylindrical latent-image-bearing member on which a toner image is formed and an intermediate transfer belt to which the toner image is primarily transferred and from which it is secondarily transported to a transfer medium.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: August 10, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kusaba, Hiroyuki Kobayashi, Akihiko Nakazawa, Atsushi Tanaka, Tsunenori Ashibe, Hidekazu Matsuda
  • Patent number: 6766127
    Abstract: A process cartridge detachably mountable on the main body of an electrophotographic apparatus, integrally supports a photosensitive drum for bearing toner images, and an intermediate transferring belt having a contact part with the photosensitive drum. The moisture amount of the intermediate transferring belt at 23° C./50% RH is less than 1% by weight and the sum of the surface roughness Ra of the photosensitive drum and the surface roughness Ra of the intermediate transferring belt is less than 0.8 &mgr;m. The present invention also provides an electrophotographic apparatus having the process cartridge and an image forming method using the electrophotographic apparatus.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: July 20, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Tanaka, Hiroyuki Kobayashi, Akihiko Nakazawa, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda, Yuji Sakurai
  • Publication number: 20040124568
    Abstract: A method for producing an endless belt for electrophotography by melt-extruding a thermoplastic resin having a diphenyl sulfone structure represented by the following Formula (1) from a circular die to produce the endless belt continuously 1
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Akihiko Nakazawa, Hiroyuki Kobayashi, Minoru Shimojo, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Patent number: 6737133
    Abstract: An electrophotographic seamless belt containing a thermoplastic fluorine resin, which contains 3 to 40 parts by weight of a polyether-ester amide or polyether amide and 0.02 to 10 parts by weight of a fluorine-atom-containing surface-active agent or halogenated alkali metal salt, based on 100 parts by weight of the thermoplastic fluorine resin. Also disclosed is an electrophotographic apparatus having the electrophotographic seamless belt.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: May 18, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kusaba, Akihiko Nakazawa, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Hidekazu Matsuda
  • Patent number: 6725002
    Abstract: A process cartridge detachably mountable to the electrophotographic apparatus main body, integrally including an electrophotographic photosensitive member to carry a toner image; an intermediate transfer belt having a contact part with the photosensitive member; primary transfer member to primarily transfer the toner image from the photosensitive member to the intermediate transfer belt; and electric charge member to give electric charges in polarity opposite to the polarity of the toner at the time of the primary transfer to the toner on the intermediate transfer belt to return the toner on the intermediate transfer belt to the photosensitive member at the contact part to clean the intermediate transfer belt, wherein the intermediate transfer belt has an average glossiness of 30 to 90; glossiness deviation within 10; average film thickness of 40 to 200 &mgr;m; and film thickness unevenness within ±20% relative to the average film thickness.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: April 20, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Sakurai, Hiroyuki Kobayashi, Akihiko Nakazawa, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Patent number: 6718148
    Abstract: A process cartridge integrally supports an electrophotographic photosensitive member, an intermediate transfer belt, primary transferer for transferring a toner image primarily from the member to the belt, a charge provider for providing the toner on the belt with electric charges having a polarity reverse to the polarity the toner has at the time of the primary transfer and returning the toner on the belt to the member at a contact zone to clean the belt, and an electrophotographic-photosensitive-member cleaner. The cartridge is dividable into an electrophotographic photosensitive member unit and an intermediate transfer belt unit and has a joining unit which joins the two units. The peripheral length and average thickness of the belt and the diameter of at least one of rollers over and around which the belt is placed satisfy specific conditions.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: April 6, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Kobayashi, Akihiko Nakazawa, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidehiko Matsuda, Yuji Sakurai