Patents by Inventor Yoshifumi Watanabe
Yoshifumi Watanabe 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: 9963603Abstract: A colored resin particle dispersion and an ink are provided which exhibit excellent color development and abrasion resistance. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent color development and abrasion resistance, together with excellent water resistance and marker resistance. Specifically provided are a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles contain a colorant, and a phosphorylated solid resin and/or a nitrated solid resin. The phosphorylated solid resin may include a phosphorylated polyvinyl alcohol and/or a phosphorylated polyvinyl acetal, and the nitrated solid resin may include a nitrocellulose.Type: GrantFiled: January 16, 2015Date of Patent: May 8, 2018Assignee: RISO KAGAKU CORPORATIONInventors: Yoshifumi Watanabe, Kazuyuki Ando, Manami Shimizu
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Publication number: 20180086927Abstract: A colored resin particle dispersion having improved fixation to the printed item immediately after printing and improved color development properties for the printed item, and an inkjet ink containing the colored resin particle dispersion. The colored resin particle dispersion contains colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles contain a colorant and a (meth)acrylic-based resin, and the (meth)acrylic-based resin has a unit A having a carboxyl group, a unit B having a phosphoric acid group and/or a phosphate ester group, and a unit C having an aromatic ring.Type: ApplicationFiled: August 24, 2017Publication date: March 29, 2018Inventors: Manami SHIMIZU, Yoshifumi WATANABE
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Publication number: 20180079854Abstract: An oil-based inkjet ink that exhibits excellent repellency by the nozzle plate, prevents degradation of the nozzle plate, reduces image show-through, and yields high image density. The oil-based inkjet ink includes an encapsulated pigment containing a pigment and a urethane compound that coats the surface of the pigment, and a non-aqueous solvent, wherein the urethane compound has a urethane skeleton and one or more side chains and is insoluble in the non-aqueous solvent, and the side chains of the urethane compound contain one or more moieties selected from the group consisting of an aromatic ring, a heterocyclic ring, a carboxyl group, an amide linkage, a fluoroalkyl group having one or more fluorine atoms, and a nitrile group.Type: ApplicationFiled: June 26, 2017Publication date: March 22, 2018Inventors: Yoshifumi WATANABE, Manami SHIMIZU, Kenji YAMADA, Tomohiro MATSUZAWA
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Publication number: 20180031427Abstract: A second case includes a projection that projects on an opposite side of a threaded portion of the second case, which is opposite from a first case, while the projection is placed in a passage when the second case is installed to an installation-subject member. An opening is formed in a visible area of an outer peripheral surface of the projection, which is visible at a time of viewing the outer peripheral surface in a flow direction of the measurement-subject medium upon installation of the second case to the installation-subject member, and the projection includes a flow direction changing portion that changes a flow direction of the measurement-subject medium, which is introduced from the passage into an introducing hole through the opening, from a direction along the passage to a direction toward the sensor unit.Type: ApplicationFiled: April 4, 2016Publication date: February 1, 2018Inventors: Kazuaki FUJISAWA, Yoshifumi WATANABE, Kouji HASHIMOTO
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Patent number: 9803064Abstract: A colored resin particle dispersion and an ink are provided which yield excellent abrasion resistance and prevent change in the color tone. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent abrasion resistance, together with excellent water resistance and marker resistance. Specifically provided is a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant, a solid resin and a liquid organic compound having an acidic group, and the oxidation-reduction potential of the colored resin particle dispersion is 300 mV or less. Also provided is an inkjet ink containing this colored resin particle dispersion.Type: GrantFiled: January 15, 2015Date of Patent: October 31, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Kazuyuki Ando, Yoshifumi Watanabe, Manami Shimizu
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Patent number: 9758693Abstract: A colored resin particle dispersion and an ink are provided which exhibit excellent abrasion resistance of the printed items and excellent storage stability of the dispersion. Specifically provided is a colored resin particle dispersion comprising colored resin particles containing a colorant and a solid resin, a basic dispersant, and a non-aqueous solvent, wherein the solid resin is a resin having alkoxy groups and/or a polysilsesquioxane. The resin having alkoxy groups preferably has methoxy groups and/or ethoxy groups. Further, the resin having alkoxy groups preferably contains at least one of a polyamide resin having methoxymethyl groups, a methoxypolysilsesquioxane and an ethoxypolysilsesquioxane.Type: GrantFiled: January 16, 2015Date of Patent: September 12, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Manami Shimizu, Yoshifumi Watanabe, Kazuyuki Ando
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Patent number: 9726070Abstract: An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion.Type: GrantFiled: April 25, 2014Date of Patent: August 8, 2017Assignee: MAKITA CORPORATIONInventors: Kenji Imafuku, Yoshifumi Watanabe, Hideaki Hirano, Junichi Masuda
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Patent number: 9719416Abstract: A stratified scavenging two-stroke engine includes: an intake passage that connects an intake opening through an outer surface of a cylinder member with an intake port opening to the inside of a cylinder, and supplies gaseous mixture of fuel and air; an exhaust passage that connects an exhaust outlet opening through the outer surface of the cylinder member with an exhaust port opening to the inside of the cylinder, and discharges combustion gas; a scavenging passage; and an air passage that connects an air inlet opening through the outer surface of the cylinder member with the scavenging passage and supplies pre-scavenging air into the scavenging passage. The intake and the air inlet are arranged at positions opposite from the exhaust port across the axis of the cylinder, and arranged side by side in a substantially circumferential direction of the cylinder or a direction substantially perpendicular to the axis of the cylinder.Type: GrantFiled: April 25, 2014Date of Patent: August 1, 2017Assignee: MAKITA CORPORATIONInventors: Kenji Imafuku, Junichi Masuda, Yoshifumi Watanabe, Hideaki Hirano
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Patent number: 9643417Abstract: A nozzle plate which exhibits excellent ink repellency and excellent durability to wiping, even when used with an ink that adheres readily to the nozzle plate is provided. A method for forming a silicone-based cured film on the ink discharge surface of a nozzle plate for an inkjet printer, the method comprising: (1) a step of preparing a condensation-type silicone composition containing at least one compound selected from the group consisting of bismuth compounds and cyclic amidine compounds, (2) a step of applying this condensation-type silicone composition to the ink discharge surface of the nozzle plate to form a coating film, and (3) a step of heating and curing this coating film.Type: GrantFiled: May 16, 2013Date of Patent: May 9, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Naofumi Ezaki, Yoshifumi Watanabe, Tetsuo Hosoya
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Publication number: 20170015793Abstract: A colored resin particle dispersion and an inkjet ink are provided which preferably exhibit excellent rub fastness and alcohol resistance, and yield printed items having high image density. Specifically, a colored resin particle dispersion includes colored resin particles, a basic dispersant and a non-aqueous solvent. The colored resin particles include a colorant, a thermoplastic solid resin and a liquid organic compound having an acidic group, and the thermoplastic solid resin has a polar parameter ?p and a hydrogen bonding parameter ?h from the Hansen solubility parameters that satisfy ?p=2.5 to 11.0 and ?h=5.0 to 12.0 respectively is provided.Type: ApplicationFiled: July 8, 2016Publication date: January 19, 2017Applicant: RISO KAGAKU CORPORATIONInventors: Yoshifumi WATANABE, Manami SHIMIZU
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Publication number: 20170015854Abstract: An inkjet ink is provided which preferably having a small particle size and excellent intermittent dischargeability. Moreover, the inkjet ink is provided which preferably improving the storage stability of the inkjet ink, and printing a printed item having excellent rub fastness. Specifically, an inkjet ink comprising colored resin particles, a basic dispersant and a non-aqueous solvent, wherein the colored resin particles comprise a pigment, a solid resin and a pigmentary synergist is provided.Type: ApplicationFiled: June 22, 2016Publication date: January 19, 2017Applicant: RISO KAGAKU CORPORATIONInventors: Manami SHIMIZU, Yoshifumi WATANABE
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Patent number: 9212289Abstract: A non-aqueous pigment ink is provided, wherein the non-aqueous pigment ink comprises a pigment complex including a pigment, a dispersant comprising a functional group having reactivity with a polyvalent isocyanate compound, and a polyvalent isocyanate compound, and a non-aqueous solvent.Type: GrantFiled: April 11, 2013Date of Patent: December 15, 2015Assignee: RISO KAGAKU CORPORATIONInventors: Manami Shimizu, Yoshifumi Watanabe, Kyoko Tsumura
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Publication number: 20150197648Abstract: A colored resin particle dispersion and an inkjet ink are provided which exhibit excellent color development properties and excellent abrasion resistance. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent color development properties and abrasion resistance, together with superior water resistance and marker resistance. Specifically provided is a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant, a solid resin and a liquid organic compound having an acidic group. Also provided is an inkjet ink containing this colored resin particle dispersion.Type: ApplicationFiled: January 14, 2015Publication date: July 16, 2015Inventors: Yoshifumi WATANABE, Kazuyuki ANDO, Manami SHIMIZU, Kyoko TSUMURA
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Publication number: 20150197652Abstract: A colored resin particle dispersion and an ink are provided which yield excellent abrasion resistance for printed items. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent abrasion resistance, water resistance and marker resistance, as well as favorable storage stability. Specifically provided are a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant and a crosslinked solid resin, and an inkjet ink containing this colored resin particle dispersion.Type: ApplicationFiled: January 15, 2015Publication date: July 16, 2015Inventors: Kazuyuki ANDO, Yoshifumi WATANABE, Manami SHIMIZU
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Publication number: 20150197653Abstract: A colored resin particle dispersion and an ink are provided which yield excellent abrasion resistance and prevent change in the color tone. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent abrasion resistance, together with excellent water resistance and marker resistance. Specifically provided is a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant, a solid resin and a liquid organic compound having an acidic group, and the oxidation-reduction potential of the colored resin particle dispersion is 300 mV or less. Also provided is an inkjet ink containing this colored resin particle dispersion.Type: ApplicationFiled: January 15, 2015Publication date: July 16, 2015Inventors: Kazuyuki ANDO, Yoshifumi WATANABE, Manami SHIMIZU
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Publication number: 20150197650Abstract: A colored resin particle dispersion and an ink are provided which exhibit excellent color development and abrasion resistance. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent color development and abrasion resistance, together with excellent water resistance and marker resistance. Specifically provided are a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles contain a colorant, and a phosphorylated solid resin and/or a nitrated solid resin. The phosphorylated solid resin may include a phosphorylated polyvinyl alcohol and/or a phosphorylated polyvinyl acetal, and the nitrated solid resin may include a nitrocellulose.Type: ApplicationFiled: January 16, 2015Publication date: July 16, 2015Inventors: Yoshifumi WATANABE, Kazuyuki ANDO, Manami SHIMIZU
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Publication number: 20150197666Abstract: A colored resin particle dispersion and an ink are provided which exhibit excellent abrasion resistance of the printed items and excellent storage stability of the dispersion. Specifically provided is a colored resin particle dispersion comprising colored resin particles containing a colorant and a solid resin, a basic dispersant, and a non-aqueous solvent, wherein the solid resin is a resin having alkoxy groups and/or a polysilsesquioxane. The resin having alkoxy groups preferably has methoxy groups and/or ethoxy groups. Further, the resin having alkoxy groups preferably contains at least one of a polyamide resin having methoxymethyl groups, a methoxypolysilsesquioxane and an ethoxypolysilsesquioxane.Type: ApplicationFiled: January 16, 2015Publication date: July 16, 2015Inventors: Manami SHIMIZU, Yoshifumi WATANABE, Kazuyuki ANDO
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Publication number: 20150174904Abstract: A nozzle plate which exhibits excellent ink repellency and excellent durability to wiping, even when used with an ink that adheres readily to the nozzle plate is provided. A method for forming a silicone-based cured film on the ink discharge surface of a nozzle plate for an inkjet printer, the method comprising: (1) a step of preparing a condensation-type silicone composition containing at least one compound selected from the group consisting of bismuth compounds and cyclic amidine compounds, (2) a step of applying this condensation-type silicone composition to the ink discharge surface of the nozzle plate to form a coating film, and (3) a step of heating and curing this coating film.Type: ApplicationFiled: May 16, 2013Publication date: June 25, 2015Inventors: Naofumi Ezaki, Yoshifumi Watanabe, Tetsuo Hosoya
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Patent number: 8967782Abstract: A non-aqueous ink comprising a carbon black and a non-aqueous solvent is provided, wherein the carbon black comprises: a carbon black (A) having a primary particle size of at least 18 nm but less than 30 nm, a DBP absorption of at least 80 cm3/100 g but not more than 130 cm3/100 g and a pH of at least 6.0 but not more than 9.0, and a carbon black (B) having a primary particle size of at least 30 nm but not more than 50 nm, a DBP absorption of at least 40 cm3/100 g but less than 80 cm3/100 g and a pH of at least 6.0 but not more than 9.0.Type: GrantFiled: July 10, 2012Date of Patent: March 3, 2015Assignee: Riso Kagaku CorporationInventors: Manami Shimizu, Yoshifumi Watanabe
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Patent number: 8888268Abstract: A printing method is provided, wherein the printing method including: printing an ink, having a total surface free energy ? calculated from the Kaelble-Uy theoretical formula of 25 to 30 mN/m, and a dispersive component ratio ?dr represented by a formula (1) shown below of 0.55 to 0.75, onto a recording medium, and transporting the recording medium using a transport member that opposes at least a printed surface of the printed recording medium, wherein the transport member has a total surface free energy ? calculated from the Kaelble-Uy theoretical formula of 20 mN/m or less, and a dispersive component ratio ?dr represented by the formula (1) shown below of 0.75 to 1.00: ?dr=?d/? (1), wherein ?dr represents the dispersive component ratio, ?d represents a surface free energy of as dispersive component, and ? represents the total surface free energy.Type: GrantFiled: August 17, 2012Date of Patent: November 18, 2014Assignee: Riso Kagaku CorporationInventors: Satoshi Aoki, Yoshifumi Watanabe