Patents by Inventor Katsuhiro Shirota
Katsuhiro Shirota 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: 5621447Abstract: In a jet recording method, a normally solid recording material is placed in a heat-melted state in a path defined by a nozzle leading to an ejection outlet and, in a recording step, is imparted with a thermal energy corresponding to a recording signal to generate a bubble, thus ejecting a droplet of the recording material out of the ejection outlet. As an improvement, in the recording step, the bubble is caused to communicate with ambience, and the droplet is ejected in a diameter d (.mu.m) and at an average speed v (m/sec) satisfying: 10.ltoreq.d.ltoreq.60 and 7.ltoreq.v.ltoreq.20. As a result, the droplet is deposited on a recording medium without pileup or scattering.Type: GrantFiled: June 6, 1995Date of Patent: April 15, 1997Assignee: Canon Kabushiki KaishaInventors: Yoshihisa Takizawa, Katsuhiro Shirota, Hisao Yaegashi
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Patent number: 5614007Abstract: Provided is an ink set comprising a liquid composition containing a cationic substance, and a black ink in combination, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water-soluble anionic dyes.Type: GrantFiled: March 27, 1995Date of Patent: March 25, 1997Assignee: Canon Kabushiki KaishaInventors: Yutaka Kurabayashi, Katsuhiro Shirota, Katsuhiko Takahashi
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Patent number: 5606356Abstract: An ink for ink-jet recording is provided which contains a coloring material and an aqueous liquid medium for solving or dispersing the coloring material, the liquid medium having a lower critical consolute temperature (Tc) to cause phase separation at a temperature in the range of from 40.degree. to 100.degree. C. Ink-jet recording method and an ink-jet recording apparatus employing the above ink are also provided.Type: GrantFiled: March 10, 1995Date of Patent: February 25, 1997Assignee: Canon Kabushiki KaishaInventors: Hiromichi Noguchi, Yuko Suga, Katsuhiro Shirota, Akio Kashiwazaki, Aya Takaide
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Patent number: 5593757Abstract: Disclosed herein is a process for producing a color filter, comprising the steps of: providing a plurality of color inks having different color properties from each other and a black ink; and ejecting the inks directly on a base or on a composition provided on the base using an ink-jet system to form a colored pattern, wherein a black matrix is formed with a black ink having a polarity opposite to that of the color inks.Type: GrantFiled: June 13, 1995Date of Patent: January 14, 1997Assignee: Canon Kabushiki KaishaInventors: Akio Kashiwazaki, Hiroshi Sato, Katsuhiro Shirota, Hideto Yokoi, Shoji Shiba
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Patent number: 5552192Abstract: A method for manufacturing a color filter which comprises arranging colorants on a substrate by using inks capable of curing by the application of energy, said method comprising (1) a step of imparting, to the substrate, the inks capable of curing by the application of energy to form colored portions, (2) a step of applying the energy to the substrate to partially cure the colored portions, (3) a step of forming an energy-curable resin layer on the partially cured colored portions, and (4) a step of curing the partially cured colored portions and the resin layer by the application of the energy.Type: GrantFiled: December 16, 1994Date of Patent: September 3, 1996Assignee: Canon Kabushiki KaishaInventors: Akio Kashiwazaki, Hiroshi Sato, Katsuhiro Shirota, Hideto Yokoi, Shoji Shiba
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Patent number: 5538550Abstract: A normally solid recording material is heat-melted in a path defined by a nozzle leading to an ejection outlet and is imparted with a thermal energy from a heater corresponding to a recording signal to generate a bubble. As a result, a droplet of the recording material is ejected out of the ejection outlet under the action of the bubble while the bubble is caused to communicated with ambience. The normally solid recording material preferably contains a colorant, a first heat-fusible solid substance having a melting point Tm of 36.degree.-150.degree. C. and a boiling point Tb of 150.degree.-370.degree. C., and a second heat-fusible solid substance having a melting point Tm and a solidifying point Tf satisfying a relationship of Tm-Tf.ltoreq.30.degree. C. The distance between the heater and the ejection outlet, the sectional size of the nozzle and the thermal energy imparted by the heater are controlled to cause the bubble to communicate with ambience.Type: GrantFiled: September 15, 1993Date of Patent: July 23, 1996Assignee: Canon Kabushiki KaishaInventors: Hisao Yaegashi, Yoshihisa Takizawa, Katsuhiro Shirota
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Patent number: 5427611Abstract: A normally solid recording material for use in a jet recording method wherein a recording material is ejected through an ejection outlet for recording, is composed from a heat-fusible solid vehicle and a dye compound. The dye compound is formed as a salt of a dye having a group of --SO.sub.3 M or --COOM (wherein M denotes an alkali metal) and a linear alkylamine. As a result, the dye compound is provided with an increased molecular length, because of which the sublimability of the dye compound is suppressed to provide the recording material with improved fixability and freeness from a bleeding phenomenon that the color of a recorded image is transferred to another sheet contacting the image.Type: GrantFiled: October 12, 1994Date of Patent: June 27, 1995Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Yoshihisa Takizawa
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Patent number: 5331344Abstract: A method for producing a liquid discharging recording head including an ink discharge opening, an ink supply opening, an ink channel communicating with the ink discharge opening and the ink supply opening, and an energy generating element provided corresponding to the ink channel and adapted for generating energy to be utilized for ink discharge comprises the steps of:forming a first photosensitive material layer for ink channel formation, on a substrate bearing thereon the energy generating element;pattern exposing the first photosensitive material layer for forming the ink channel;forming a second photosensitive material layer on the first photosensitive material layer;pattern exposing the second photosensitive material layer for forming the ink discharge opening and the ink supply opening; anddeveloping the first and the second layers of photosensitive materials.Type: GrantFiled: December 19, 1991Date of Patent: July 19, 1994Assignee: Canon Kabushiki KaishaInventors: Masashi Miyagawa, Masanori Takenouchi, Katsuhiro Shirota, Norio Ohkuma, Yoshihisa Takizawa, Toshiharu Inui, Kazuhiro Nakajima
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Patent number: 5270730Abstract: A normally solid recording material is heat-melted in a path defined by a nozzle leading to an ejection outlet and is imparted with a thermal energy from a heater corresponding to a recording signal to generate a bubble. As a result, a droplet of the recording material is ejected out of the ejection outlet under the action of the bubble while the bubble is caused to communicate with ambience. The normally solid recording material preferably contains a colorant, a first heat-fusible solid substance having a melting point Tm of 36.degree.-150.degree. C. and a boiling point Tb of 150.degree.-370.degree. C., and a second heat-fusible solid substance having a melting point Tm and a solidifying point Tf satisfying a relationship of Tm-Tf.ltoreq.30.degree. C. The distance between the heater and the ejection outlet, the sectional size of the nozzle and the thermal energy imparted by the heater are controlled to cause the bubble to communicate with ambience.Type: GrantFiled: September 30, 1991Date of Patent: December 14, 1993Assignee: Canon Kabushiki KaishaInventors: Hisao Yaegashi, Yoshihisa Takizawa, Katsuhiro Shirota
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Patent number: 5231417Abstract: A recording process, ink-jet device, ink jet recording apparatus and ink cartridge employing an ink comprising a dye and a liquid medium, wherein said dye is a dye of Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent independently an alkyl group, an alkoxy group or an acetylamino group; R.sub.3 represents --SO.sub.3 M or a hydrogen atom; R.sub.4 represents a hydrogen atom, --SO.sub.3 M or --NRR.sub.5, where R.sub.5 represents a hydrogen atom, a phenyl group that may have a substituent, or a group of the formula ##STR2## where R.sub.6 and R.sub.7 represent independently a hydrogen atom or --C.sub.2 H.sub.4 OH; M represents an alkali metal; an ammonium group or an organic ammonium group; and l, m and n represent independently an integer of 0 or 1.Type: GrantFiled: January 31, 1992Date of Patent: July 27, 1993Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Tsuyoshi Eida, Megumi Saito, Takao Yamamoto
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Patent number: 5216437Abstract: An ink that includes a liquid medium and a dye represented by the following Formula (I): ##STR1## wherein M represents a cation selected from an alkali metal, ammonium, and an organic ammonium; R.sub.1 and R.sub.2 independently represent a group selected from a hydrogen atom, a methyl group, a methoxy group, an ethoxy group, and an acetylamino group; R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 independently represent a group selected from a hydrogen atom, a hydroxyl group, a sulfonic acid group, a methoxy group, and an ethoxy group; X represents a hydrogen atom, an acetyl group, a benzoyl group, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 CH.sub.3, or ##STR2## where R.sub.9 and R.sub.10 independently represent a hydrogen atom, or --C.sub.2 H.sub.4 OH; and the sulfonic acid group is present as a salt of the same cation as that represented by M.Type: GrantFiled: February 5, 1992Date of Patent: June 1, 1993Assignee: Canon Kabushiki KaishaInventors: Takao Yamamoto, Tsuyoshi Eida, Katsuhiro Shirota, Megumi Saito
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Patent number: 5139573Abstract: An ink that includes a liquid medium and a dye represented by the following Formula (I): ##STR1## wherein M represents a cation selected from an alkali metal, ammonium, and an organic ammonium; R.sub.1 and R.sub.2 independently represent a group selected from a hydrogen atom, a methyl group, a methoxy group, an ethoxy group, and an acetylamino group; R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 independently represent a group selected from a hydrogen atom, a hydroxyl group, a sulfonic acid group, a methoxy group, and an ethoxy group; X represents a hydrogen atom, an acetyl group, a benzoyl group, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 CH.sub.3, or ##STR2## where R.sub.9 and R.sub.10 independently represent a hydrogen atom, or --C.sub.2 H.sub.4 OH; and the sulfonic acid group is present as a salt of the same cation as that represented by M.Type: GrantFiled: August 21, 1991Date of Patent: August 18, 1992Assignee: Canon Kabushiki KaishaInventors: Takao Yamamoto, Tsuyoshi Eida, Katsuhiro Shirota, Megumi Saito
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Patent number: 5135571Abstract: A recording liquid, comprising a recording agent which is a component that forms a recorded image and a liquid medium in which said recording agent is dissolved or dispersed, wherein said recording agent comprises a dye represented by the Formula (A) ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of a hydrogen atom, a methyl group, a methoxy group, a chloro group, a sulfonic acid group; X represents a residual group of an organic acid; and M represents a base selected from the group consisting of an alkali metal group, an ammonium group, and an organic amine group and at least one dye selected from the group consisting of C.I. Acid Red 131, C.I. Acid Red 274, C.I. Direct Red 227 and C.I. Direct Red 9.Type: GrantFiled: October 30, 1990Date of Patent: August 4, 1992Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Osamu Nishiwaki, Kazuo Iwata, Shinichi Tochihara
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Patent number: 5135570Abstract: An ink comprises a dye and a liquid medium, wherein said dye is a dye represented by the following Formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent hydrogen atom, a methyl group, a methoxy group or --SO.sub.3 M, R.sub.3 and R.sub.4 each represent a methyl group, methoxy group or an acetylamino group; X represents an acetyl group, a benzoyl group, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 --CH.sub.3, or --N.sub.3 C.sub.3 (NHR.sub.5)(NHR.sub.6), where R.sub.5 and R.sub.6 each represent a hydrogen atom, or --C.sub.2 H.sub.4 OH; and M represents an alkali metal, an ammonium group, or an organic ammonium group. An ink-jet recording process comprising applying the ink to a recording medium.Type: GrantFiled: July 25, 1991Date of Patent: August 4, 1992Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Megumi Saito, Katsuhiro Shirota, Takao Yamamoto
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Patent number: 5123960Abstract: An ink in which a dye and a liquid carrier medium are present. The ink includes a dye comprising a compound represented by the following general formula (I): ##STR1## wherein Ph is a copper or nickel phthalocyanine residue, M is an alkali metal or ammonium, R.sub.1 and R.sub.2 are each H, --(CH.sub.2 CH.sub.2 O).sub.m --R.sub.3 or --(CH.sub.2 CHOH).sub.m --R.sub.3 in which R.sub.3 is H, CH.sub.3, C.sub.2 H.sub.5 or CH.sub.2 OH and in which m is a number from 0 to 4, a is a number from 0 to 2, X is a lower alkylene or phenylene group, C is a number from 2 to 3, and b is a number from 0 to 2 with the proviso that when b is 0, then Y and Z are respectively Cl, OH or OR.sub.4 is an alkyl group having 1 or 2 carbons or a hydroxyalkyl group, and when b is not 0, then Y is Cl, NR.sub.5 R.sub.6 or OR.sub.7 and Z is NR.sub.5 R.sub.6, OR.sub.7, a substituted or unsubstituted anilino group or a substituted or unsubstituted phenoxy group, wherein R.sub.5 and R.sub.Type: GrantFiled: September 18, 1990Date of Patent: June 23, 1992Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Tsuyoshi Eida, Takao Yamamoto, Mayumi Yamamoto
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Patent number: 5110356Abstract: The present invention provides an ink comprising a dye and a liquid medium, wherein said dye is a dye of Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent independently an alkyl group, an alkoxy group or an acetylamino group; R.sub.3 represents --SO.sub.3 M or a hydrogen atom; R.sub.4 represents a hydrogen atom, --SO.sub.3 M or --NHR.sub.5, where R.sub.5 represents a hydrogen atom, a phenyl group that may have a substituent, or a group of the formula ##STR2## where R.sub.6 and R.sub.7 represent independently a hydrogen atom or --C.sub.2 H.sub.4 OH; M represents an alkali metal, an ammonium group or an organic ammonium group; and 1, m and n represent independently an integer of 0 or 1.Type: GrantFiled: August 21, 1991Date of Patent: May 5, 1992Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Tsuyoshi Eida, Megumi Saito, Takao Yamamoto
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Patent number: 5074914Abstract: A recording liquid including a recording agent which is a component that forms a recorded image and a liquid medium in which said recording agent is dissolved or dispersed, wherein said recording agent comprises a dye (A) C.I. Reactive Red 23 and a dye (B) represented by R.sub.1 C.sub.6 H.sub.3 (SO.sub.3 M).sub.n --N.dbd.N--C.sub.10 H.sub.3 (OH)(NHR.sub.2)(SO.sub.3 M).sub.2, wherein R.sub.1 represents H, halogen atom, carboxyl or alkyl; R.sub.2 represents --COCH.sub.3, --SO.sub.2 C.sub.6 H.sub.4 CH.sub.3 or --COC.sub.6 H.sub.4 R.sub.3, where R.sub.3 represents H or Cl; M represents a base; and n represents either 0 or 1. An ink-jet recording method comprises applying a droplet of the recording liquid to a recording medium to carry out recording.Type: GrantFiled: October 30, 1990Date of Patent: December 24, 1991Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Kazuo Iwata
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Patent number: 5059246Abstract: A recording liquid comprising a coloring material and a liquid medium containing water and a water-soluble organic solvent having an ether bond, and a pH value of said recording liquid being from 3 to 9 and a peroxide concentration of the liquid medium being not more than 4 mmol/l in terms of iodine is provided. And also an ink-jet recording process that performs recording by ejecting the recording liquid in the form of droplets from a minute ejection orifice, to a recording medium by the action of heat energy, is provided.Type: GrantFiled: October 17, 1990Date of Patent: October 22, 1991Assignee: Canon Kabushiki KaishaInventors: Takao Yamamoto, Katsuhiro Shirota
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Patent number: 4864324Abstract: There is disclosed a method for forming a color image by use of a plurality of color inks containing a cyan ink, wherein there is used an ink as the cyan ink which contains a metallophthalocyanine dye and/or a metal-free phthalocyanine dye and which contains free ions of divalent or higher metals at the concentration of 15 ppm or less, the methallophthalocyanine dye having a coordination metal selected from the metal atoms of the groups, IIA, IVB, VA, VIIA and VIII of the periodic Table of The Elements at the center of its skeleton, and the metal-free phthalocyanine dye having no coordination metal at the center of its skeleton, and also an ink to be used therefor.Type: GrantFiled: August 11, 1987Date of Patent: September 5, 1989Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Shirota, Tsuyoshi Eida, Yuko Suga
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Patent number: 4804411Abstract: A recording liquid comprising a solution of a recording agent is provided. The recording agent has a structure containing a plural number of structural units linked together through a linking group or groups. The structural unit may be a dye residue.Type: GrantFiled: February 13, 1987Date of Patent: February 14, 1989Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Yuko Suga, Katsuhiro Shirota