Patents by Inventor Hiroko Hayashi
Hiroko Hayashi 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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Publication number: 20130235134Abstract: An ink composition for ink jet recording includes a penetrant for ink jet recording that includes a compound represented by the following formula (1) and 1% by mass or less of alcohol represented by the following formula (2).Type: ApplicationFiled: March 12, 2013Publication date: September 12, 2013Applicant: SEIKO EPSON CORPORATIONInventors: Tomoyuki Okuyama, Masahiro Yatake, Hiroko Hayashi
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Patent number: 7691192Abstract: An ink composition including at least water, a cyan dye represented by the formula shown below and an aromatic compound having a carboxyl group and/or a salt thereof; an inkjet recording method using the composition; and recorded matter which is recorded by the recording method wherein M represents a hydrogen atom, a metal element, a metal oxide, a metal hydroxide or a metal halide, R1 to R4 each independently represents —SO2Z, and Z represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, provided that at least one of four Z's has an ionic hydrophilic group as a substituent.Type: GrantFiled: September 30, 2004Date of Patent: April 6, 2010Assignees: Seiko Epson Corporation, Fuji Film CorporationInventors: Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi, Keiichi Tateishi, Shigeaki Tanaka, Yoshiharu Yabuki
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Patent number: 7676165Abstract: This invention provides an image forming apparatus capable of adjusting the image sync signal output timing in the subscanning direction and the speed of a primary transfer process so as to obtain a proper throughput of a printer engine when successively forming images, and a control method therefor. To accomplish this, when the speed of an intermediate transfer member is to change upon changing the print speed, a toner image to be secondarily transferred after changing the speed is primarily transferred at an intermediate transfer member speed before the change. After the speed of the intermediate transfer member is switched, the image primarily transferred before changing the speed is secondarily transferred. Primary transfer, which has conventionally been performed after changing the print speed, can be executed before changing the print speed.Type: GrantFiled: September 21, 2007Date of Patent: March 9, 2010Assignee: Canon Kabushiki KaishaInventor: Hiroko Hayashi
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Patent number: 7553885Abstract: An ink for inkjet recording of the invention includes water and a pigment, where the pigment is dispersed using a polymer having a refractive index of at least 1.58 or more, an acid value of 50 mgKOH/g to 120 mgKOH/g, and a weight average molecular weight of 20000 to 120000. It is preferable that the polymer is prepared by using a (meta)acrylate and/or a sulfur-containing (meth)acrylate which have at least a plurality of aromatic rings.Type: GrantFiled: April 19, 2006Date of Patent: June 30, 2009Assignee: Seiko Epson CorporationInventors: Masahiro Yatake, Yasuhiro Oki, Motoki Masuda, Hiroko Hayashi
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Publication number: 20080146713Abstract: Provided are an ink jet recording ink (IJ ink), an ink jet recording ink set (IJ ink set) and a recording method, having excellent dispersion stability and ejection stability and being capable of providing images which is free from bleeding and which is excellent in color development property and rubbing resistance. An IJ ink and I an IJ ink set having long-term storage stability are provided. Also provided are recorded matter having excellent color development property and rubbing resistance, and an ink jet recording apparatus capable of providing the same.Type: ApplicationFiled: October 31, 2007Publication date: June 19, 2008Inventors: Masahiro Yatake, Toshiyuki Miyabayashi, Hiroko Hayashi
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Publication number: 20080075489Abstract: This invention provides an image forming apparatus capable of adjusting the image sync signal output timing in the subscanning direction and the speed of a primary transfer process so as to obtain a proper throughput of a printer engine when successively forming images, and a control method therefor. To accomplish this, when the speed of an intermediate transfer member is to change upon changing the print speed, a toner image to be secondarily transferred after changing the speed is primarily transferred at an intermediate transfer member speed before the change. After the speed of the intermediate transfer member is switched, the image primarily transferred before changing the speed is secondarily transferred. Primary transfer, which has conventionally been performed after changing the print speed, can be executed before changing the print speed.Type: ApplicationFiled: September 21, 2007Publication date: March 27, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Hiroko Hayashi
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Publication number: 20080022895Abstract: Problem to be Solved: To provide an ink composition capable of giving printed matter excellent in gas fastness and light fastness and free from generation of a bronzing phenomenon, an inkjet recording method using the ink composition, and recorded matter which is recorded by the recording method. Means to Solve the Problem: An ink composition comprising at least water, a cyan dye represented by the formula shown below and an aromatic compound having a carboxyl group and/or a salt thereof; an inkjet recording method using the composition; and recorded matter which is recorded by the recording method.Type: ApplicationFiled: September 30, 2004Publication date: January 31, 2008Inventors: Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi, Keiichi Tateishi, Shigeaki Tanaka, Yoshiharu Yabuki
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Patent number: 7307109Abstract: An ink jet recording ink (IJ ink) containing a colorant of a pigment and/or dye enveloped in a polymer, and water, and containing at least one compound from the group of acetylene glycol surfactants and acetylene alcohol surfactants, and another compound from the group of glycol ethers and 1,2-alkylene glycols; an IJ ink set including a plurality of the inks; a recording method of using the ink and/or the ink set; recorded matter printed according to the recording method; and an ink jet recording apparatus having an electrostrictive unit mounted thereon and designed so as to be capable of ejecting the ink.Type: GrantFiled: June 6, 2001Date of Patent: December 11, 2007Assignee: Seiko Epson CorporationInventors: Masahiro Yatake, Toshiyuki Miyabayashi, Hiroko Hayashi
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Patent number: 7303616Abstract: It is an object of the present invention to provide an ink composition using a metal phthalocyanine type cyan dye, according to which the indoor storability (gas resistance) of images created using the ink composition can be improved. The present invention provides an ink composition containing water, metal phthalocyanine type cyan dye, and aromatic compound having a sulfo group and/or salt thereof represented by undermentioned general formula (1) and/or (2). Moreover, the present invention provides an ink jet recording method comprising carrying out recording by discharging droplets of an ink composition and attaching the droplets to a recording medium, wherein the ink jet recording method uses an ink composition as described above as the ink composition. Furthermore, the present invention provides a recorded article characterized by being obtained by recording using an ink composition as described above.Type: GrantFiled: September 28, 2004Date of Patent: December 4, 2007Assignee: Seiko Epson CorporationInventors: Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi
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Publication number: 20070263054Abstract: The present invention aims to provide an ink for ink jet recording that is excellent in storage stability and discharge stability and attains high coloration on regular paper or gloss paper and high glossiness on gloss paper. The ink for ink jet recording of the invention includes: water; and a pigment dispersed by using a polymer which is obtained by polymerizing at least 50% by weight or more of benzylacrylate and 15% by weight or less of (meth)acrylic acid as components of the polymer and has an acid value of no less than 50 mgKOH/g and no more than 120 mgKOH/g and a weight average molecular weight of no less than 10000 and no more than 120000.Type: ApplicationFiled: October 24, 2005Publication date: November 15, 2007Inventors: Masahiro Yatake, Motoki Masuda, Jyun Ito, Yasuhiro Oki, Hiroko Hayashi
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Publication number: 20070054980Abstract: An ink for inkjet recording of the invention includes water and a pigment, where the pigment is dispersed using a polymer having a refractive index of at least 1.58 or more, an acid value of 50 mgKOH/g to 120 mgKOH/g, and a weight average molecular weight of 20000 to 120000. It is preferable that the polymer is prepared by using a (meta)acrylate and/or a sulfur-containing (meth)acrylate which have at least a plurality of aromatic rings.Type: ApplicationFiled: April 19, 2006Publication date: March 8, 2007Inventors: Masahiro Yatake, Yasuhiro Oki, Motoki Masuda, Hiroko Hayashi
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Patent number: 7083669Abstract: The present invention provides an ink composition comprising at least: water; a cyan dye; and an aromatic compound having a carboxyl group and/or a salt thereof. Also disclosed are an inkjet recording method using the ink composition, and recorded matter recorded using the ink composition or by the inkjet recording method.Type: GrantFiled: April 21, 2003Date of Patent: August 1, 2006Assignee: Seiko Epson CorporationInventors: Hiroshi Fukumoto, Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi
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Publication number: 20060135646Abstract: It is an object of the present invention to provide an ink composition using a metal phthalocyanine type cyan dye, according to which the indoor storability (gas resistance) of images created using the ink composition can be improved. The present invention provides an ink composition containing water, metal phthalocyanine type cyan dye, and aromatic compound having a sulfo group and/or salt thereof represented by undermentioned general formula (1) and/or (2). Moreover, the present invention provides an ink jet recording method comprising carrying out recording by discharging droplets of an ink composition and attaching the droplets to a recording medium, wherein the ink jet recording method uses an ink composition as described above as the ink composition. Furthermore, the present invention provides a recorded article characterized by being obtained by recording using an ink composition as described above.Type: ApplicationFiled: September 28, 2004Publication date: June 22, 2006Inventors: Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi
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Publication number: 20050124726Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.Type: ApplicationFiled: October 17, 2002Publication date: June 9, 2005Inventors: Masahiro Yatake, Hidehiko Komatsu, Hitoshi Ohta, Kazuhiko Hara, Hiroko Hayashi, Jun Ito, Nagatoshi Kasahara, Keiichi Noto
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Patent number: 6852154Abstract: The invention provides: an ink set comprising a yellow ink composition, a magenta ink composition, and a cyan ink composition, wherein the magenta ink composition contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof; and an ink set comprising two magenta ink compositions differing in color density, wherein the magenta ink composition having a lower color density contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof. Also disclosed are: an ink cartridge housing the ink set; a process for recording with the ink set; and recorded matter obtained by recording with the ink set.Type: GrantFiled: April 21, 2003Date of Patent: February 8, 2005Assignee: Seiko Epson CorporationInventors: Kazuhiko Kitamura, Hiroko Hayashi, Kyoichi Oka
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Patent number: 6802893Abstract: An ink for ink jet recording including at least a particulate pigment having a sulfur-containing dispersibility providing group chemically bonded to the pigment surface with a treatment containing sulfur, a penetrating agent and a liquid component including water. In one embodiment, the liquid component includes polyvalent metal ions and has a sulfur content that is 2,000 ppm or less as calculated in terms of SO42−. In other embodiments, the ink has (a) a sulfonic acid anion group or a sulfinic acid anion group and an alkaline metal or monovalent counter ion; (b) a penetrating agent having the formula R—EOn2—POm2—X; and (c) a sulfur-containing dispersibility providing group in an amount of 10×106 equivalent or more per gram of particulate pigment.Type: GrantFiled: April 11, 2001Date of Patent: October 12, 2004Assignee: Seiko Epson CorporationInventors: Hidehiko Komatsu, Hiroto Nakamura, Masahiro Yatake, Hiroko Hayashi, Makoto Matsuzaki, Fumitsugu Ito, Hitoshi Ohta
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Patent number: 6767090Abstract: An ink jet recording ink set including a plurality of inks, each ink including at least a colorant encapsulating a pigment with a polymer, a penetrating agent and water, wherein the ink set includes a combination of black, yellow, magenta and cyan inks, and wherein the polymer in each of the black, yellow, magenta and cyan inks is a polymer of a polymerizable surface active agent and a monomer, which gives high color density printed image, satisfactory color reproducibility, excellent ejection stability and storage stability.Type: GrantFiled: February 4, 2002Date of Patent: July 27, 2004Assignee: Seiko Epson CorporationInventors: Masahiro Yatake, Toshiyuki Miyabayashi, Hiroko Hayashi
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Patent number: 6719833Abstract: A recording medium is provided that exhibits both outstanding ink absorbency and outstanding light resistance of images, and an image forming method and a recorded matter using such recording medium are also provided. The recording medium in the present invention comprises a supporting body and an ink receiving layer deployed on that supporting body, and tho ink receiving layer contains a compound expressed by the general formula (I) below, and having a solubility in water of 0.01 to 5%. (where X is H, or an alkyl, aryl or other group; R1 to R4 is H or alkyl group; and Y is OH, or a carboxyl, alkyl, amino, alkenyl, alkoxy, aryl or other group. Y may also be a polymer. This compound may also be a polymer having X and Y as a main chain.Type: GrantFiled: January 25, 2001Date of Patent: April 13, 2004Assignee: Seiko Epson CorporationInventors: Masahiro Hanmura, Hiroyuki Onishi, Hiroko Hayashi, Miharu Kanaya
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Publication number: 20040048745Abstract: The invention provides: an ink set comprising a yellow ink composition, a magenta ink composition, and a cyan ink composition, wherein the magenta ink composition contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof; and an ink set comprising two magenta ink compositions differing in color density, wherein the magenta ink composition having a lower color density contains as a colorant at least one member selected from compounds represented by the following formula (1) and salts thereof.Type: ApplicationFiled: April 21, 2003Publication date: March 11, 2004Applicant: SEIKO EPSON CORPORATIONInventors: Kazuhiko Kitamura, Hiroko Hayashi, Kyoichi Oka
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Publication number: 20040003755Abstract: The present invention provides an ink composition comprising at least: water; a cyan dye; and an aromatic compound having a carboxyl group and/or a salt thereof. Also disclosed are an inkjet recording method using the ink composition, and recorded matter recorded using the ink composition or by the inkjet recording method.Type: ApplicationFiled: April 21, 2003Publication date: January 8, 2004Applicant: SEIKO EPSON CORPORATIONInventors: Hiroshi Fukumoto, Yasuhiro Oki, Kazuhiko Kitamura, Hiroko Hayashi