Patents by Inventor Hiroshi Yusa
Hiroshi Yusa 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: 11362388Abstract: A battery pack is provided with a plurality of battery blocks each including a peripheral surface on one end of which a first connector is provided, a connecting unit which connects a plurality of battery blocks to each other such that two first connectors are opposed to each other, and a second connector which fits in the two first connectors opposed to each other. The battery block is rotationally fixed to the connecting unit.Type: GrantFiled: November 13, 2015Date of Patent: June 14, 2022Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiroshi Yusa, Hideo Uryu
-
Publication number: 20170244073Abstract: A battery pack is provided with a plurality of battery blocks each including a peripheral surface on one end of which a first connector is provided, a connecting unit which connects a plurality of battery blocks to each other such that two first connectors are opposed to each other, and a second connector which fits in the two first connectors opposed to each other. The battery block is rotationally fixed to the connecting unit.Type: ApplicationFiled: November 13, 2015Publication date: August 24, 2017Inventors: Hiroshi YUSA, Hideo URYU
-
Patent number: 7267919Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C.Type: GrantFiled: March 20, 2006Date of Patent: September 11, 2007Assignee: Canon Kabushiki KaishaInventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Patent number: 7097951Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C.Type: GrantFiled: August 29, 2005Date of Patent: August 29, 2006Assignee: Canon Kabushiki KaishaInventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Publication number: 20060177753Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/lO min at a temperature of 125° C.Type: ApplicationFiled: March 20, 2006Publication date: August 10, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Patent number: 7001703Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C.Type: GrantFiled: September 25, 2003Date of Patent: February 21, 2006Assignee: Canon Kabushiki KaishaInventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Publication number: 20060035163Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C.Type: ApplicationFiled: August 29, 2005Publication date: February 16, 2006Inventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Patent number: 6881527Abstract: In a toner having a polyester resin as a binder resin component, and a colorant, the toner contains (a) in the binder resin component, from 20.0% by weight to 65.0% by weight of a tetrahydrofuran-insoluble matter A1 in 6-hour extraction and from 35.0% by weight to 80.0% by weight of a tetrahydrofuran-soluble matter A2 in 6-hour extraction, (b) in the binder resin component, from 10.0% by weight to 30.0% by weight of a tetrahydrofuran-insoluble matter B1 in 16-hour extraction and from 70.0% by weight to 90.0% by weight of a tetrahydrofuran-soluble matter B2 in 16-hour extraction, and (c) in the binder resin component, from 0.5% by weight to 3.0% by weight of an orthodichloro-benzene-insoluble matter C1 in 6-hour extraction at 185° C. and from 97.0% by weight to 99.5% by weight of an orthodichlorobenzene-soluble matter C2 in 6-hour extraction at 185° C. The proportion of C1 to B1, C1/B1, is from 0.06 to 0.15, and the A1, B1 and C1 satisfy the following expression (1): A1>B1>C1.Type: GrantFiled: March 20, 2003Date of Patent: April 19, 2005Assignee: Canon Kabushiki KaishaInventors: Shuhei Moribe, Hirohide Tanikawa, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa, Hideto Iida, Katsuhisa Yamazaki
-
Patent number: 6875549Abstract: A toner showing a high transferability and suitable for use in cleanerless image forming system is formed of toner particles comprising at least a binder resin and magnetic iron oxide. The toner is characterized by a specific circularity distribution relative to its weight-average particle size and a controlled degree of surface-exposed magnetic iron oxide providing an extract solution with hydrochloric acid showing an absorbance of 1.0-2.5 at a wavelength of 340 nm. The toner is suitably produced by a production system including a rotary mechanical pulverizer and a one-pass surface treatment apparatus for continuously applying a mechanical impact force to pulverized toner particles therein.Type: GrantFiled: April 8, 2002Date of Patent: April 5, 2005Assignee: Canon Kabushiki KaishaInventors: Katsuhisa Yamazaki, Hirohide Tanikawa, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa, Shuhei Moribe
-
Publication number: 20040110076Abstract: To provide a toner including at least a binder resin and magnetic iron oxide, in which the magnetic iron oxide contains 0.1 to 2.0% by mass of Si with respect to the magnetic iron oxide and 0.1 to 4.0% by mass of Zn with respect to the magnetic iron oxide, a concentration of Si atoms is 12.50 to 17.50%, a concentration of Fe atoms is 70.00 to 85.00%, and a concentration of Zn atoms is 1.00 to 7.00% on an outermost surface of the magnetic iron oxide, measured by an X-ray photoelectron spectroscopy (XPS), and a Zn/Si ratio being 0.05 to 0.5, a Fe/Si ratio being 3.00 to 7.00, and a Fe/Zn ratio is 10.00 to 70.00 on an outermost surface of the magnetic iron oxide. As a result, a magnetic toner in which the rising of the toner charge amount is rapid, the degradation of image quality and reduction in image density are not caused even after a long-term use, and which is excellent in environmental stability can be obtained.Type: ApplicationFiled: September 29, 2003Publication date: June 10, 2004Inventors: Katsuhisa Yamazaki, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa, Hideto Iida, Syuhei Moribe
-
Publication number: 20040081905Abstract: A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C.Type: ApplicationFiled: September 25, 2003Publication date: April 29, 2004Inventors: Syuhei Moribe, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Publication number: 20040005509Abstract: In a toner having a polyester resin as a binder resin component, and a colorant, the toner contains (a) in the binder resin component, from 20.0% by weight to 65.0% by weight of a tetrahydrofuran-insoluble matter A1 in 6-hour extraction and from 35.0% by weight to 80.0% by weight of a tetrahydrofuran-soluble matter A2 in 6-hour extraction, (b) in the binder resin component, from 10.0% by weight to 30.0% by weight of a tetrahydrofuran-insoluble matter B1 in 16-hour extraction and from 70.0% by weight to 90.0% by weight of a tetrahydrofuran-soluble matter B2 in 16-hour extraction, and (c) in the binder resin component, from 0.5% by weight to 3.0% by weight of an orthodichloro- benzene-insoluble matter C1 in 6-hour extraction at 185° C. and from 97.0% by weight to 99.5% by weight of an orthodichlorobenzene-soluble matter C2 in 6-hour extraction at 185° C. The proportion of C1 to B1, C1/B1, is from 0.06 to 0.Type: ApplicationFiled: March 20, 2003Publication date: January 8, 2004Inventors: Shuhei Moribe, Hirohide Tanikawa, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa, Hideto Iida, Katsuhisa Yamazaki
-
Publication number: 20030036008Abstract: A toner showing a high transferability and suitable for use in cleanerless image forming system is formed of toner particles comprising at least a binder resin and magnetic iron oxide. The toner is characterized by a specific circularity distribution relative to its weight-average particle size and a controlled degree of surface-exposed magnetic iron oxide providing an extract solution with hydrochloric acid showing an absorbance of 1.0-2.5 at a wavelength of 340 nm. The toner is suitably produced by a production system including a rotary mechanical pulverizer and a one-pass surface treatment apparatus for continuously applying a mechanical impact force to pulverized toner particles therein.Type: ApplicationFiled: April 8, 2002Publication date: February 20, 2003Inventors: Katsuhisa Yamazaki, Hirohide Tanikawa, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa, Shuhei Moribe
-
Patent number: 6485875Abstract: A toner is constituted by at least a binder resin, a colorant and a wax. The binder resin has been formed from monomers including a vinyl monomer and polyester-forming monomers containing at least a polybasic carboxylic acid having three or more carboxyl groups or its anhydride, and comprises at least a hybrid resin comprising a vinyl polymer unit and a polyester unit.Type: GrantFiled: October 26, 2000Date of Patent: November 26, 2002Assignee: Canon Kabushiki KaishaInventors: Yuki Karaki, Hiroshi Yusa, Takashige Kasuya, Yoshihiro Ogawa
-
Publication number: 20020055053Abstract: A toner showing quick chargeability and stable chargeability in a high humidity environment is provided by a combination of a specific polyester binder resin and a specific azo iron compound. The polyester binder resin has an acid value (Av) of 0.5 to 30 mgKOH/g and a hydroxyl value (OHv) of 1 to 50 mgKOH/g giving a ratio (Av/OHv) therebetween satisfying: 0.05≦Av/OHv≦2.0. The azo iron compound is preferably an iron complex (salt) including as a ligand a mono-azo compound formed by diazo coupling between a 2-aminophenol (derivative) and an alkyl-substituted naphthol (derivative).Type: ApplicationFiled: September 6, 2001Publication date: May 9, 2002Inventors: Takashige Kasuya, Hirohide Tanikawa, Hiroshi Yusa, Yoshihiro Ogawa, Katsuhisa Yamazaki, Ryota Kashiwabara
-
Patent number: 6300024Abstract: A toner is principally constituted by a binder resin, a colorant and a wax. The toner has a maximum heat-absorption peak of 60-135° C. as measured by differential scanning calorimetry (DSC). The toner further has a viscoelastic characteristic measured at an angular frequency of the toner of 6.28 rad/sec including: a temperature giving a loss molecules G″ of 3×104 Pa of 90-115° C., a temperature giving a loss modulus G″ of 2×104 Pa of 95-120° C., a temperature giving a loss modulus G″ of 1×104 Pa of 105-135° C., a tan &dgr; (loss modulus G″/storage modulus G′) when G″=1×104-3×104 Pa of 0.6-2.0, a storage modulus at 170° C. (G′ (170° C.)) of 1×102-1×104 Pa, a loss modulus at 170° C. (G″ (170° C.)) of 1×102-1×104 Pa, and a ratio of a tan &dgr; at 170° C. (tan &dgr;170) to a tan &dgr; at 150° C. (tan &dgr;150) (tan &dgr;170/tan &dgr;150) of 1.05-1.6.Type: GrantFiled: June 28, 2000Date of Patent: October 9, 2001Assignee: Canon Kabushiki KaishaInventors: Hiroshi Yusa, Satoshi Yoshida, Takashige Kasuya, Yuki Karaki
-
Patent number: 6214509Abstract: The objects of the present invention are to provide a toner excellent in transferability, little remaining on the photosensitive member and causing no defective image in roll-aided transfer (or at least such a phenomenon is well-controlled), and also to provide an image forming method using the same toner. The above objects are achieved when the toner contains a binder resin and colorant, inorganic fine particles, and a hydrotalcite compound shown by the formula: M1y12+M2y22+ . . . Mjyj2+L1x13+L2x23+ . . . Lkxk3+(OH)2.(X/n)An−.mH2O (1) wherein 0<[X=(x1+x2+ . . . xk)]≦0.5; Y=(y1+y2+ . . . +yj)=1−X; j and k are each an integer of 2 or larger; M13+, M23+, . . . and Mj2+ are divalent metallic ions different from each other; L13+, L23+ . . .Type: GrantFiled: May 13, 1999Date of Patent: April 10, 2001Assignee: Canon Kabushiki KaishaInventors: Takashige Kasuya, Tsutomu Kukimoto, Satoshi Yoshida, Hiroshi Yusa, Manabu Ohno, Tsuyoshi Takiguchi, Yuki Karaki, Satoshi Handa, Masanori Ito
-
Patent number: 6033817Abstract: A toner for developing an electrostatic image is disclosed which has at least one endothermic peak in the temperature region of 120.degree. C. or below in differential thermal analysis and contains, in its particles having particle diameters of 3 .mu.m or larger, not less than 93% by number of particles having a circularity of at least 0.90 and less than 30% by number of particles having a circularity of at least 0.98. The toner does not cause the re-transfer under high transfer current conditions and can realize the formation of good images with high image density. Also, an image forming method using the toner is disclosed.Type: GrantFiled: July 29, 1997Date of Patent: March 7, 2000Assignee: Canon Kabushiki KaishaInventors: Hiroshi Yusa, Motoo Urawa, Keita Nozawa, Yuki Karaki, Kazuo Maruyama
-
Patent number: 6002895Abstract: A toner is comprised of a composition containing at least a polymer component and a charge control agent. The polymer component contains substantially no tetrahydrofuran (THF)-insoluble matter. The polymer component THF-soluble has a major peak and a minor peak in the specific molecular weight regions in gel permeation chromatography (GPC). The low molecular weight component and high molecular weight component of the polymer component, each of which shows the specific molecular weight region in GPC, have the specific acid values, respectively. The difference between the acid values is in the specific range.Type: GrantFiled: July 15, 1997Date of Patent: December 14, 1999Assignee: Canon Kabushiki KaishaInventors: Takashige Kasuya, Hiroyuki Suematsu, Koichi Tomiyama, Hiroshi Yusa, Takakuni Kobori, Masaichiro Katada
-
Patent number: 5912101Abstract: A toner for forming an image has toner particles containing at least a colorant, a binder resin and a wax. The toner has (i) a circularity distribution in which the toner has an average circularity of 0.900 to less than 0.965, contains 20 to 60% by number of particles with a circularity of less than 0.95 and has a mode circularity of 0.90 or more; and (ii) a particle size distribution in which the toner has a circle-equivalent average diameter of 2.0 to 10.0 .mu.m and has at least one peak of frequency by number in the region of a circle-equivalent diameter of 0.6 to 3.0 .mu.m and at least one peak of frequency by number in the region of a circle-equivalent diameter of from more than 3.0 .mu.m to 10.0 .mu.m. The wax has an endothermic main peak as measured by DSC of 60 to 120.degree. C. The binder resin contains THF soluble matter and 0 to 5.0% by weight of THF insoluble matter.Type: GrantFiled: April 6, 1998Date of Patent: June 15, 1999Assignee: Canon Kabushiki KaishaInventors: Yuki Karaki, Hiroshi Yusa, Takashige Kasuya, Kazuo Maruyama, Masao Takano