Patents by Inventor Tetsuya Ida
Tetsuya Ida 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).
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Patent number: 7288348Abstract: In a color toner having toner particles which have toner base particles containing a binder resin, a colorant and a wax, and inorganic fine particles, (i) in the toner base particles, particles having a circle-equivalent diameter of 3.00 ?m or more as measured with a flow type particle image analyzer have an average circularity of from 0.920 or more to less than 0.950, (ii) in the particles having a circle-equivalent diameter of 3.00 ?m or more in the toner base particles, particles having a circularity of 0.960 or more are in a number frequency cumulative value of 40% or less; and (iii) in the particles having a circle-equivalent diameter of 3.00 ?m or more in the toner base particles, particles having a circularity of 0.920 or less are in a number frequency cumulative value of 30% or less. Also disclosed is a full-color image forming method making use of the toner.Type: GrantFiled: September 9, 2004Date of Patent: October 30, 2007Assignee: Canon Kabushiki KaishaInventors: Kazuhiko Hayami, Tetsuya Ida, Nozomu Komatsu, Yasuhiro Ichikawa, Akira Hashimoto, Hirohide Tanikawa, Takakuni Kobori, Takayuki Itakura, Hiroyuki Fujikawa, Koh Ishigami, Nobuyoshi Sugahara
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Publication number: 20070224531Abstract: The present invention provides a yellow toner which is excellent in transparency of an image formed on an OHP sheet, excellent in color reproducibility even when a light-pressure fixing unit is employed, excellent in coloring power and charge property, and is reduced in occurrence of filming. The present invention also provides a yellow toner having excellent durability and capable of contributing to the simplification or miniaturization of the constitution of an image forming apparatus. The yellow toner of the invention comprises a binder resin and a colorant, the binder resin contains at least a polyester unit, and the toner in the powder state has a lightness L* satisfying the relationship of L*>87 and has a chromaticity b* satisfying the relationship of 106<b*<120.Type: ApplicationFiled: May 24, 2007Publication date: September 27, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Ida, Yasuhiro Ichikawa, Wakashi Iida, Yojiro Hotta, Kazuhiko Hayami, Hirohide Tanikawa
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Publication number: 20070122727Abstract: Provided a toner including at least: toner particles each containing at least a binder resin, a release agent, and a colorant; and an inorganic fine powder, in which: a degree of aggregation Y1 at a time of compression (200 kpa) of the toner satisfies a relationship of 15?Y1?35, and a degree of aggregation Y2 at a time of non-compression of the toner satisfies a relationship of 7?Y2?15; and a highest endothermic peak of the toner is present in a temperature range of 30 to 200° C. in an endothermic curve measured with a differential scanning calorimeter (DSC), and a peak temperature Tsc (° C.) of the highest endothermic peak satisfies a relationship of 60?Tsc?130.Type: ApplicationFiled: January 30, 2007Publication date: May 31, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Ida, Takeshi Ootsu, Koh Ishigami, Naoki Okamoto, Nozomu Komatsu, Noriyoshi Umeda, Yoshinobu Baba, Takayuki Itakura, Takeshi Naka, Hirohide Tanikawa
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Patent number: 7112395Abstract: To provide a color toner which is effective in mitigating contamination of a charging member, which is good at low temperature fixing in high-speed copying, and which is excellent in blocking resistance and electrification stability in continuous copying. Provided is a color toner containing at least a binder resin, a colorant, and a releasing agent, in which: (i) the binder resin contains at least a polyester unit; (ii) a weight average particle diameter of the color toner is greater than 6.5 ?m and equal to or less than 11 ?m; (iii) an average circularity A of particles in the color toner each having a circle-equivalent diameter of 3 ?m or more satisfies the relationship of 0.915?A?0.960; (iv) a permeability B (%) of the color toner in a 45 vol % aqueous solution of methanol satisfies the relationship of 10?B?70; and (v) an endothermic curve obtained through differential thermal analysis (DSC) measurement of the color toner has one or multiple endothermic peaks in the temperature range of 30 to 200° C.Type: GrantFiled: March 5, 2004Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Tetsuya Ida, Yasuhiro Ichikawa, Hirohide Tanikawa, Nozomu Komatsu
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Publication number: 20060127793Abstract: In a carrier comprising carrier particles; each carrier particle comprising a carrier core and a coat layer for coating the carrier core, the carrier core has a ferrite component containing i) a metal oxide having at least one of metallic elements Mg, Li and Ca, the total-sum content of which is 10 to 40 mole % based on the whole ferrite component, and ii) a metal oxide having at least one of metallic elements Mn, Cu, Cr and Zn, the total-sum content of which is 50 to 4,000 ppm based on the whole ferrite component. The carrier has a volume distribution based 50% particle diameter (D50) of from 15.0 to 55.0 ?m and a degree of surface unevenness of from 1.05 to 1.30, and the coat layer contains particles; the particles having a number-average primary particle diameter of from 10 to 500 nm.Type: ApplicationFiled: November 7, 2005Publication date: June 15, 2006Applicant: Canon Kabushiki KaishaInventors: Yojiro Hotta, Tetsuya Ida, Wakashi Iida, Akira Hashimoto, Nozomu Komatsu, Yoshinobu Baba
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Patent number: 7022449Abstract: To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles have a weight-average particle diameter of 3.5 to 8.0 ?m; total amount of acid value and hydroxyl value of the toner is 30 to 75 mgKOH/g; average circularity of particles contained in the toner having circle-equivalent diameter of 2 ?m or more is 0.915 to 0.960; loss tangent tan ? (103 to 104 Hz) of the toner is represented by the following expression: tan ?(103 to 104 Hz)?0.0060 where the loss tangent tan ? is represented by ??/?? where ?? denotes dielectric loss factor and ?? denotes dielectric constant, and tan ? (103 to 104 Hz) denotes the loss tangent in a frequency range of 103 to 104 Hz; and a ratio of tan ? (105 Hz) to tan ? (5×104 Hz) is represented by the following expression: 1.05?tan ?(105 Hz)/tan ?(5×104 Hz)?1.Type: GrantFiled: July 30, 2003Date of Patent: April 4, 2006Assignee: Canon Kabushiki KaishaInventors: Nobuyoshi Sugahara, Takaaki Kohtaki, Yasuhiro Ichikawa, Tetsuya Ida, Kazuhiko Hayami, Nozomu Komatsu
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Publication number: 20060014095Abstract: To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles have a weight-average particle diameter of 3.5 to 8.0 ?m; total amount of acid value and hydroxyl value of the toner is 30 to 75 mgKOH/g; average circularity of particles contained in the toner having circle-equivalent diameter of 2 ?m or more is 0.915 to 0.960; loss tangent tan ? (103 to 104 Hz) of the toner is represented by the following expression: tan ? (103 to 104 Hz)?0.0060 where the loss tangent tan ? is represented by ??/?? where ?? denotes dielectric loss factor and ?? denotes dielectric constant, and tan ? (103 to 104 Hz) denotes the loss tangent in a frequency range of 103 to 104 Hz; and a ratio of tan ? (105 Hz) to tan ? (5×104 Hz) is represented by the following expression: 1.05?tan ? (105 Hz)/tan ? (5×104 Hz)?1.Type: ApplicationFiled: September 14, 2005Publication date: January 19, 2006Applicant: Canon Kabushiki KaishaInventors: Nobuyoshi Sugahara, Takaaki Kohtaki, Yasuhiro Ichikawa, Tetsuya Ida, Kazuhiko Hayami, Nozomu Komatsu
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Publication number: 20050106488Abstract: The present invention provides a yellow toner which is excellent in transparency of an image formed on an OHP sheet, excellent in color reproducibility even when a light-pressure fixing unit is employed, excellent in coloring power and charge property, and is reduced in occurrence of filming. The present invention also provides a yellow toner having excellent durability and capable of contributing to the simplification or miniaturization of the constitution of an image forming apparatus. The yellow toner of the invention comprises a binder resin and a colorant, the binder resin contains at least a polyester unit, and the toner in the powder state has a lightness L* satisfying the relationship of L*>87 and has a chromaticity b* satisfying the relationship of 106<b*<120.Type: ApplicationFiled: November 4, 2004Publication date: May 19, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Ida, Yasuhiro Ichikawa, Wakashi Iida, Yojiro Hotta, Kazuhiko Hayami, Hirohide Tanikawa
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Publication number: 20050079429Abstract: In a color toner having toner particles which have toner base particles containing a binder resin, a colorant and a wax, and inorganic fine particles, (i) in the toner base particles, particles having a circle-equivalent diameter of 3.00 ?m or more as measured with a flow type particle image analyzer have an average circularity of from 0.920 or more to less than 0.950, (ii) in the particles having a circle-equivalent diameter of 3.00 ?m or more in the toner base particles, particles having a circularity of 0.960 or more are in a number frequency cumulative value of 40% or less; and (iii) in the particles having a circle-equivalent diameter of 3.00 ?m or more in the toner base particles, particles having a circularity of 0.920 or less are in a number frequency cumulative value of 30% or less. Also disclosed is a full-color image forming method making use of the toner.Type: ApplicationFiled: September 9, 2004Publication date: April 14, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiko Hayami, Tetsuya Ida, Nozomu Komatsu, Yasuhiro Ichikawa, Akira Hashimoto, Hirohide Tanikawa, Takakuni Kobori, Takayuki Itakura, Hiroyuki Fujikawa, Koh Ishigami, Nobuyoshi Sugahara
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Patent number: 6850374Abstract: To provide a lens select device in which an iris image pickup function may be incorporated into a portable information terminal at low cost. In a lens support member 34, a small gear 51 is formed at one end part of the lens support member, and a lens-housing boss part 53 and a lens-housing boss part 54 are juxtaposed at the other end part. By turning the small gear 51, the first lens or the second lens is aligned with a predetermined position. An operation part 59 is provided. When the operation part 59 engages with the small gear 51 and turns the same, the operation part 59 switches the lens which is aligned with the predetermined position to the first lens or the second lens. Preferably, the operation part 59 is an arcuate member which turns about a position, which is different from a rotational center of the small gear 51, and it is an inscribed gear 59 having teeth formed in the inner peripheral surface, which are in mesh with the small gear 51.Type: GrantFiled: May 8, 2003Date of Patent: February 1, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsurou Kajino, Jouji Wada, Takashi Kusakari, Takuya Imaoka, Tetsuya Ida
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Patent number: 6808852Abstract: A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed by copolymerization of a styrenic monomer together with at least one of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers and (meth)acrylate ester monomers, in the presence of a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin. The toner has a GPC molecular weight distribution including a weight-average molecular weight (Mw) of at least 4.0×104 an a ratio Mw/Mn of at least 50 between the Mw and a number-average molecular weight (Mn).Type: GrantFiled: September 4, 2002Date of Patent: October 26, 2004Assignee: Canon Kabushiki KaishaInventors: Yojiro Hotta, Wakashi Iida, Tetsuya Ida, Takayuki Itakura, Nozomu Komatsu
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Publication number: 20040197694Abstract: A color toner that comprises at least a binder resin, a colorant and a release agent, wherein the binder resin has at least a polyester unit and is synthesized in the presence of a tin compound as a catalyst represented by the general formula (1):Type: ApplicationFiled: April 6, 2004Publication date: October 7, 2004Inventors: Kazuhiko Hayami, Hirohide Tanikawa, Tetsuya Ida, Akira Hashimoto, Nozomu Komatsu, Hiroyuki Fujikawa
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Publication number: 20040175642Abstract: To provide a color toner which is effective in mitigating contamination of a charging member, which is good at low temperature fixing in high-speed copying, and which is excellent in blocking resistance and electrification stability in continuous copying. Provided is a color toner containing at least a binder resin, a colorant, and a releasing agent, in which: (i) the binder resin contains at least a polyester unit; (ii) a weight average particle diameter of the color toner is greater than 6.5 &mgr;m and equal to or less than 11 &mgr;m; (iii) an average circularity A of particles in the color toner each having a circle-equivalent diameter of 3 &mgr;m or more satisfies the relationship of 0.915≦A≦0.Type: ApplicationFiled: March 5, 2004Publication date: September 9, 2004Inventors: Tetsuya Ida, Yasuhiro Ichikawa, Hirohide Tanikawa, Nozomu Komatsu
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Publication number: 20040058264Abstract: To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles have a weight-average particle diameter of 3.5 to 8.0 &mgr;m; total amount of acid value and hydroxyl value of the toner is 30 to 75 mgKOH/g; average circularity of particles contained in the toner having circle-equivalent diameter of 2 &mgr;m or more is 0.915 to 0.Type: ApplicationFiled: July 30, 2003Publication date: March 25, 2004Inventors: Nobuyoshi Sugahara, Takaaki Kohtaki, Yasuhiro Ichikawa, Tetsuya Ida, Kazuhiko Hayami, Nozomu Komatsu
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Publication number: 20030214732Abstract: To provide a lens select device in which an iris image pickup function may be incorporated into a portable information terminal at low cost.Type: ApplicationFiled: May 8, 2003Publication date: November 20, 2003Applicant: Matsushita Electric Industrial Co. Ltd.Inventors: Tetsurou Kajino, Jouji Wada, Takashi Kusakari, Takuya Imaoka, Tetsuya Ida
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Patent number: 6641967Abstract: A carrier for electrophotography and a two component type developer using the carrier. The carrier is composed of magnetic particles of a magnetic ferrite component represented by Formula: (Fe2O3)X(MnO)Y(A)Z. An image forming method is also disclosed which uses the two component type developer.Type: GrantFiled: March 28, 2002Date of Patent: November 4, 2003Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Takiguchi, Kenji Okado, Tetsuya Ida
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Publication number: 20030129517Abstract: A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed by copolymerization of a styrenic monomer together with at least one of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers and (meth)acrylate ester monomers, in the presence of a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin. The toner has a GPC molecular weight distribution including a weight-average molecular weight (Mw) of at least 4.0×104 an a ratio Mw/Mn of at least 50 between the Mw and a number-average molecular weight (Mn).Type: ApplicationFiled: September 4, 2002Publication date: July 10, 2003Inventors: Yojiro Hotta, Wakashi Iida, Tetsuya Ida, Takayuki Itakura, Nozomu Komatsu
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Publication number: 20030008226Abstract: A carrier for electrophotography and a two component type developer using the carrier. The carrier is composed of magnetic particles of a magnetic ferrite component represented by Formula: (Fe2O3)X(MnO)Y(A)Z. An image forming method is also disclosed which uses the two component type developer.Type: ApplicationFiled: March 28, 2002Publication date: January 9, 2003Inventors: Tsuyoshi Takiguchi, Kenji Okado, Tetsuya Ida
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Publication number: 20020037470Abstract: A carrier for electrophotography and a two component type developer using the carrier.Type: ApplicationFiled: August 30, 2001Publication date: March 28, 2002Inventors: Tsuyoshi Takiguchi, Kenji Okado, Tetsuya Ida
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Patent number: 6316156Abstract: A carrier for electrophotography and a two component type developer using the carrier. The carrier is composed of magnetic particles of a magnetic ferrite component represented by Formula: (Fe2O3)X(MnO)Y(A)Z. An image forming method is also disclosed which uses the two component type developer.Type: GrantFiled: June 21, 1995Date of Patent: November 13, 2001Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Takiguchi, Kenji Okado, Tetsuya Ida