Patents by Inventor Takaya Kitawaki
Takaya Kitawaki 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: 8133313Abstract: An embodiment of the invention is concerned with an aqueous inkjet ink containing an ink solvent containing water and a water-soluble organic solvent containing glycerin and triethylene glycol and a pigment dispersed in the ink solvent. The water-soluble organic solvent accounts for from 30 to 80% by weight of the ink solvent, a weight of the triethylene glycol is from 0.5 to 1.5 times the weight of the glycerin, and the pigment is blended in an amount of from 2 to 20% by weight of the total weight of the ink.Type: GrantFiled: February 11, 2009Date of Patent: March 13, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takaya Kitawaki
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Publication number: 20110279502Abstract: According to one embodiment, an ink jet head has a pressure room that is filled with liquid, a nozzle which ejects the liquid in the pressure room, an actuator which varies a volume of the pressure room, and a processor. The processor outputs a voltage having a waveform which sequentially includes an increasing pulse for increasing the volume of the pressure room, a first decreasing pulse for decreasing the volume of the pressure room, and a second decreasing pulse for decreasing the volume of the pressure room, to the actuator as a driving voltage.Type: ApplicationFiled: May 6, 2011Publication date: November 17, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Yoshiaki Kaneko, Takao Izumi, Takaya Kitawaki, Takashi Kado
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Publication number: 20110273508Abstract: According to one embodiment, an aqueous inkjet ink includes water in an amount of from 35 to 60% by mass of the total amount, an ether in an amount of from 5 to 50% by mass of the total amount, 2,5,8,11-tetramethyl-6-dodecine-5,8-diol in an amount of from 0.2 to 2% by mass of the total amount, and a pigment in an amount of from 3 to 10% by mass of the total amount. The ether includes at least one of polyoxyethylene diglyceryl ether having a weight average molecular weight of not more than 1,000 and polyoxypropylene diglyceryl ether having a weight average molecular weight of not more than 1,000.Type: ApplicationFiled: April 27, 2011Publication date: November 10, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Hiroshi Kiyomoto, Kazuhiko Ohtsu, Takaya Kitawaki
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Publication number: 20110181641Abstract: According to one embodiment, an image recording apparatus has a printing unit and a controller. The printing unit prints—using a removable color material. The controller is configured to control the printing unit to print images on a paper over plural passes in a divided manner.Type: ApplicationFiled: January 19, 2011Publication date: July 28, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Takaya Kitawaki, Yoshiaki Kaneko, Takashi Kado
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Publication number: 20100171784Abstract: An image recording apparatus includes a recording head and a first conveyance unit. An applying unit applies the recording medium on the first conveyance unit with treatment liquid. One end of a second conveyance unit is connected on an upstream side from the applying unit disposed on the first conveyance unit and the other end is connected on a downstream side from the applying unit disposed on the first conveyance unit and on the upstream side from the recording head in the conveyance direction, the second conveyance unit conveying the recording medium. A conveyance switching unit is disposed on the one end of the second conveyance unit and switches conveyance of the recording medium to the applying unit side of the first conveyance unit or to the second conveyance unit side according to a content of recording data.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takaya Kitawaki, Satoshi Kaiho, Atsushi Kubota
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Patent number: 7708821Abstract: An aqueous ink for inkjet recording is provided, which includes water, pigment, a water-soluble organic solvent incorporated at a content of not less than 30% by weight, a surfactant, and 3-methoxy-3-methyl-1-butanol. The surfactant is formed of at least one selected from the group consisting of acetylene glycol-based surfactant and a fluorinated surfactant.Type: GrantFiled: May 14, 2008Date of Patent: May 4, 2010Assignee: Toshiba Tec Kabushiki KaishaInventors: Hiroshi Kiyomoto, Masashi Hiroki, Takaya Kitawaki, Ryozo Akiyama
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Patent number: 7645332Abstract: A non-aqueous ink composition for inkjet which comprises a pigment, a dispersant, and a non-aqueous solvent is disclosed. The non-aqueous solvent comprises 50 to 90% by weight of a first liquid paraffin, and the balance of a second liquid paraffin, which is characterized in that an average number of carbon atom in the first liquid paraffin is 28 and an average number of carbon atom in the second liquid paraffin ranges from 23 to 27.Type: GrantFiled: April 28, 2006Date of Patent: January 12, 2010Assignee: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto
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Publication number: 20090295892Abstract: According to an embodiment of the invention, in an inkjet printer, after attaching a colorless pretreatment liquid onto plain paper, at least one ink composition capable of reacting with the pretreatment liquid is injected, thereby forming an image. The pretreatment liquid contains water, a metal salt, a fluorescent brightener and at least one butane derivative selected from the group consisting of 3-methoxy-3-methyl-1-butanol, 1,3-butylene glycol and isoprene glycol. The ink composition contains a coloring material and water.Type: ApplicationFiled: March 23, 2009Publication date: December 3, 2009Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takaya Kitawaki, Atsushi Kubota, Kazuhiko Ohtsu
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Publication number: 20090220694Abstract: An embodiment of the invention is concerned with an aqueous inkjet ink containing an ink solvent containing water and a water-soluble organic solvent containing glycerin and triethylene glycol and a pigment dispersed in the ink solvent. The water-soluble organic solvent accounts for from 30 to 80% by weight of the ink solvent, a weight of the triethylene glycol is from 0.5 to 1.5 times the weight of the glycerin, and the pigment is blended in an amount of from 2 to 20% by weight of the total weight of the ink.Type: ApplicationFiled: February 11, 2009Publication date: September 3, 2009Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takaya Kitawaki
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Publication number: 20090219330Abstract: According to an embodiment of the present invention, with an inkjet printer, an image is formed by adhering a colorless pretreatment liquid containing a polyvalent metal salt, 3-methoxy-3-methyl-1-butanol, and water to a plain paper thereby subjecting the plain paper to pretreatment, and thereafter, ejecting at least one type of ink composition containing a pigment and water and reacting with the polyvalent metal salt onto the plain paper.Type: ApplicationFiled: February 18, 2009Publication date: September 3, 2009Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Hiroshi Kiyomoto, Ryoze Akiyama, Takaya Kitawaki
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Publication number: 20080282932Abstract: An aqueous ink for inkjet recording is provided, which includes water, pigment, a water-soluble organic solvent incorporated at a content of not less than 30% by weight, a surfactant, and 3-methoxy-3-methyl-1-butanol. The surfactant is formed of at least one selected from the group consisting of acetylene glycol-based surfactant and a fluorinated surfactant.Type: ApplicationFiled: May 14, 2008Publication date: November 20, 2008Inventors: Hiroshi Kiyomoto, Masashi Hiroki, Takaya Kitawaki, Ryozo Akiyama
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Patent number: 7393400Abstract: Disclosed is a non-aqueous ink composition for ink jet, comprising a pigment, a dispersant, and a non-aqueous solvent. At least 50% by weight of the entire non-aqueous solvent is an ester series solvent having 24 to 36 carbon atoms.Type: GrantFiled: December 8, 2005Date of Patent: July 1, 2008Assignee: Toshiba Tec Kabushiki KaishaInventors: Takaya Kitawaki, Masashi Hiroki, Hiroshi Kiyomoto
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Patent number: 7311371Abstract: A method for recording on a recording medium by discharging a non-aqueous ink containing a non-aqueous solvent and a pigment by an inkjet system. The method contains a step of preparing recording paper having a thickness exceeding 0.083 mm as a recording medium, a step of obtaining a volume Vm and a thickness Tm of the recording paper, a step of obtaining a volume Vs of a solvent that is capable of being retained by the recording paper by using a solvent having a vapor pressure at 25° C. of 0.001 mmHg or less and a specific gravity of from 0.800 to 1.200, a step of obtaining a solvent absorptivity Asl. (%) of the recording paper by the following equation (1): Asl.=(Vs/Vm)×100 ??(1) a step of obtaining an allowable ink amount VI (pl/m2) per unit area of the recording paper by the following equation (2): VI=(Tm?0.083)×Asl.×1012 ??(2) and a step of discharging the non-aqueous ink in an amount Vd (pl/m2) satisfying the following equation (3) by an inkjet system: Vd?VI.Type: GrantFiled: April 26, 2006Date of Patent: December 25, 2007Assignee: Toshiba Tec Kabushiki KaishaInventors: Takaya Kitawaki, Masashi Hiroki, Hiroshi Kiyomoto
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Patent number: 7303621Abstract: An inkjet ink composition is provided, which includes pigment, a dispersing agent, and polyalkylene glycol monoether as a solvent. This ink composition is characterized in that the polyalkylene glycol monoether polyalkylene glycol monoether is constituted by 50-90 wt %, based on an entire quantity of the solvent, of tetraethylene glycol monobutylether, and the balance of triethylene glycol monobutylether.Type: GrantFiled: August 31, 2005Date of Patent: December 4, 2007Assignee: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto
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Patent number: 7300508Abstract: There is disclosed an inkjet ink composition including a pigment, a dispersing agent, and a solvent. This solvent is constituted by 60-80 wt %, based on an entire quantity of the solvent, of tetraethylene glycol monobutylether, and the balance of aliphatic alcohol having 14 or 16 carbon atoms.Type: GrantFiled: September 6, 2005Date of Patent: November 27, 2007Assignee: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto
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Publication number: 20070252859Abstract: A method for recording on a recording medium by discharging a non-aqueous ink containing a non-aqueous solvent and a pigment by an inkjet system. The method contains a step of preparing recording paper having a thickness exceeding 0.083 mm as a recording medium, a step of obtaining a volume Vm and a thickness Tm of the recording paper, a step of obtaining a volume Vs of a solvent that is capable of being retained by the recording paper by using a solvent having a vapor pressure at 25° C. of 0.001 mmHg or less and a specific gravity of from 0.800 to 1.200, a step of obtaining a solvent absorptivity Asl. (%) of the recording paper by the following equation (1): Asl.=(Vs/Vm)×100??(1) a step of obtaining an allowable ink amount VI (pl/m2) per unit area of the recording paper by the following equation (2): VI=(Tm?0.083)×Asl.Type: ApplicationFiled: April 26, 2006Publication date: November 1, 2007Applicant: Toshiba Tec Kabushiki KaishaInventors: Takaya Kitawaki, Masashi Hiroki, Hiroshi Kiyomoto
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Publication number: 20070251413Abstract: A non-aqueous ink composition for inkjet which comprises a pigment, a dispersant, and a non-aqueous solvent is disclosed. The non-aqueous solvent comprises 50 to 90% by weight of a first liquid paraffin, and the balance of a second liquid paraffin, which is characterized in that an average number of carbon atom in the first liquid paraffin is 28 and an average number of carbon atom in the second liquid paraffin ranges from 23 to 27.Type: ApplicationFiled: April 28, 2006Publication date: November 1, 2007Applicant: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto
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Publication number: 20070131137Abstract: A non-aqueous ink composition for an ink jet is disclosed which includes a pigment, a dispersant and a non-aqueous solvent. The non-aqueous solvent contains at least 70% by weight of a vegetable oil.Type: ApplicationFiled: December 9, 2005Publication date: June 14, 2007Inventors: Takaya Kitawaki, Masashi Hiroki, Hiroshi Kiyomoto
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Publication number: 20070051273Abstract: There is disclosed an inkjet ink composition including a pigment, a dispersing agent, and a solvent. This solvent is constituted by 60-80 wt %, based on an entire quantity of the solvent, of tetraethylene glycol monobutylether, and the balance of aliphatic alcohol having 14 or 16 carbon atoms.Type: ApplicationFiled: September 6, 2005Publication date: March 8, 2007Applicant: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto
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Publication number: 20070044683Abstract: An inkjet ink composition is provided, which includes pigment, a dispersing agent, and polyalkylene glycol monoether as a solvent. This ink composition is characterized in that the polyalkylene glycol monoether polyalkylene glycol monoether is constituted by 50-90 wt %, based on an entire quantity of the solvent, of tetraethylene glycol monobutylether, and the balance of triethylene glycol monobutylether.Type: ApplicationFiled: August 31, 2005Publication date: March 1, 2007Applicant: Toshiba Tec Kabushiki KaishaInventors: Masashi Hiroki, Takaya Kitawaki, Hiroshi Kiyomoto