Patents by Inventor Hitomi MOTANI
Hitomi MOTANI 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: 10591830Abstract: In an image forming method, a black toner and a color toner other than the black toner are used. The black toner and the color toner each include a binder resin including a polyester resin as a main component and a vinyl resin, a releasing agent, and an external additive. A content Vk % by mass of the vinyl resin relative to total mass of the binder resin included in the black toner, a content Vc % by mass of the vinyl resin relative to total mass of the binder resin included in the color toner, a content Wk % by mass of the releasing agent relative to the total mass of the binder resin included in the black toner, and a content Wc % by mass of the releasing agent relative to the total mass of the binder resin included in the color toner satisfy a specific relationship.Type: GrantFiled: September 12, 2018Date of Patent: March 17, 2020Assignee: KONICA MINOLTA, INC.Inventors: Kaori Matsushima, Tomoko Mine, Hitomi Motani
-
Patent number: 10539897Abstract: An image forming method uses a color toner including a yellow toner, a magenta toner, a cyan toner, and a black toner. The image forming method includes a toner image forming step of forming a toner image by developing the color toner on an electrostatic latent image formed by charging and exposing a surface of an electrostatic latent image bearing member, a transfer step of transferring the toner image onto a recording medium to form a color toner image, and a fixing step of fixing the color toner image on the recording medium. Each toner contain at least a binder resin, a coloring agent, a release agent, and a layered silicate compound. The volume average particle diameter of each toner is 4 to 6 ?m. The content of the aluminum element in each toner represented by the Net intensity by WDXRF analysis has a specific relationship.Type: GrantFiled: October 17, 2018Date of Patent: January 21, 2020Assignee: KONICA MINOLTA, INC.Inventors: Hitomi Motani, Tomoko Mine, Kaori Matsushima
-
Patent number: 10350910Abstract: The present invention addresses at least the problem of providing a method for forming a high-resolution foil image regardless of the hydrophilicity of a recording medium. In order to solve said problem, the present invention provides a method wherein an adhesive ink that is formed by dispersing or dissolving a polymer resin in water and in a water-soluble organic solvent is used as an adhesive for a foil, the adhesive is applied by means of inkjet printing, and a foil image is formed. The polymer resin of the adhesive ink is a polymer of a monomer that includes (meth)acrylic acid and a (meth)acrylic acid alkyl ester having a C2-12 alkyl group, the acid value of the polymer resin being 50-120 mg KOH/g, and the glass transition temperature of the polymer resin being 30-110° C.Type: GrantFiled: July 24, 2015Date of Patent: July 16, 2019Assignee: KONICA MINOLTA, INC.Inventors: Hideya Miwa, Takayuki Ishikawa, Ryuichi Hiramoto, Hitomi Motani
-
Publication number: 20190137899Abstract: An image forming method uses a color toner including a yellow toner, a magenta toner, a cyan toner, and a black toner. The image forming method includes a toner image forming step of forming a toner image by developing the color toner on an electrostatic latent image formed by charging and exposing a surface of an electrostatic latent image bearing member, a transfer step of transferring the toner image onto a recording medium to form a color toner image, and a fixing step of fixing the color toner image on the recording medium. Each toner contain at least a binder resin, a coloring agent, a release agent, and a layered silicate compound. The volume average particle diameter of each toner is 4 to 6 ?m. The content of the aluminum element in each toner represented by the Net intensity by WDXRF analysis has a specific relationship.Type: ApplicationFiled: October 17, 2018Publication date: May 9, 2019Inventors: Hitomi MOTANI, Tomoko MINE, Kaori MATSUSHIMA
-
Publication number: 20190094732Abstract: In an image forming method, a black toner and a color toner other than the black toner are used. The black toner and the color toner each include a binder resin including a polyester resin as a main component and a vinyl resin, a releasing agent, and an external additive. A content Vk % by mass of the vinyl resin relative to total mass of the binder resin included in the black toner, a content Vc % by mass of the vinyl resin relative to total mass of the binder resin included in the color toner, a content Wk % by mass of the releasing agent relative to the total mass of the binder resin included in the black toner, and a content Wc % by mass of the releasing agent relative to the total mass of the binder resin included in the color toner satisfy a specific relationship.Type: ApplicationFiled: September 12, 2018Publication date: March 28, 2019Inventors: Kaori MATSUSHIMA, Tomoko MINE, Hitomi MOTANI
-
Patent number: 10203623Abstract: It is an object to suppress yellowing of a binder resin while obtaining an image with a high degree of whiteness and to suppress occurrence of image defects when printing at a high temperature and a high humidity. A toner for developing an electrostatic image, the toner including: white toner base particles containing a binder resin and titanium oxide having an average particle size of from 130 to 600 nm; and an external additive including strontium titanate.Type: GrantFiled: October 31, 2017Date of Patent: February 12, 2019Assignee: KONICA MINOLTA, INC.Inventors: Yasuko Uchino, Hitomi Motani, Tomomi Oshiba
-
Publication number: 20180129147Abstract: It is an object to suppress yellowing of a binder resin while obtaining an image with a high degree of whiteness and to suppress occurrence of image defects when printing at a high temperature and a high humidity. A toner for developing an electrostatic image, the toner including: white toner base particles containing a binder resin and titanium oxide having an average particle size of from 130 to 600 nm; and an external additive including strontium titanate.Type: ApplicationFiled: October 31, 2017Publication date: May 10, 2018Inventors: Yasuko UCHINO, Hitomi MOTANI, Tomomi OSHIBA
-
Publication number: 20170203581Abstract: The present invention addresses at least the problem of providing a method for forming a high-resolution foil image regardless of the hydrophilicity of a recording medium. In order to solve said problem, the present invention provides a method wherein an adhesive ink that is formed by dispersing or dissolving a polymer resin in water and in a water-soluble organic solvent is used as an adhesive for a foil, the adhesive is applied by means of inkjet printing, and a foil image is formed. The polymer resin of the adhesive ink is a polymer of a monomer that includes (meth)acrylic acid and a (meth)acrylic acid alkyl ester having a C2-12 alkyl group, the acid value of the polymer resin being 50-120 mg KOH/g, and the glass transition temperature of the polymer resin being 30-110° C.Type: ApplicationFiled: July 24, 2015Publication date: July 20, 2017Inventors: Hideya MIWA, Takayuki ISHIKAWA, Ryuichi HIRAMOTO, Hitomi MOTANI
-
Patent number: 9360785Abstract: Disclosed are a toner for electrostatic image development and an image formation process using the same which can achieve high varnish application property and high adhesion of a heat-fixed image to a varnish layer even when the varnish layer is formed on the fixed image formed by an image formation process of an electrophotographic system. The toner for electrostatic image development includes toner particles containing at least a binder resin, a colorant and a parting agent, and the binder resin contains a polyfunctional acrylate-modified polyester resin obtained by modification with a polyfunctional acrylate compound. In the toner for electrostatic image development, it is preferable that the toner particles have a core-shell structure, in which the surface of a core particle is coated with a shell layer, and the polyfunctional acrylate-modified polyester resin is contained in the shell layer.Type: GrantFiled: May 21, 2014Date of Patent: June 7, 2016Assignee: KONICA MINOLTA, INC.Inventors: Hitomi Motani, Ito Koga, Tomomi Oshiba, Kishio Tamura
-
Patent number: 9012120Abstract: The production process is a process for producing a toner for electrostatic image development. The process has an aggregating step of adding an aggregating agent composed of a compound having a divalent or trivalent metal element into a dispersion with fine particles of a binder resin dispersed in an aqueous medium, and an aggregation terminating step of adding an aggregation terminating agent into the dispersion. The aggregation terminating agent is composed of a compound having at least one of a structure (1) represented by a formula (1) and a structure (2) represented by a formula (2). In the formulae (1) and (2), R1 to R9 each independently represent a hydrogen atom, a hydroxy group or an organic group. At least one of R1 and R4 or at least one of R5 and R6 represents a hydroxy group.Type: GrantFiled: December 4, 2012Date of Patent: April 21, 2015Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tomomi Oshiba, Tomoko Mine, Hitomi Motani, Saburou Hiraoka
-
Publication number: 20140349230Abstract: Disclosed are a toner for electrostatic image development and an image formation process using the same which can achieve high varnish application property and high adhesion of a heat-fixed image to a varnish layer even when the varnish layer is formed on the fixed image formed by an image formation process of an electrophotographic system. The toner for electrostatic image development includes toner particles containing at least a binder resin, a colorant and a parting agent, and the binder resin contains a polyfunctional acrylate-modified polyester resin obtained by modification with a polyfunctional acrylate compound. In the toner for electrostatic image development, it is preferable that the toner particles have a core-shell structure, in which the surface of a core particle is coated with a shell layer, and tine polyfunctional acrylate-modified polyester resin is contained in the shell layer.Type: ApplicationFiled: May 21, 2014Publication date: November 27, 2014Applicant: Konica Minolta, Inc.Inventors: Hitomi Motani, Ito Koga, Tomomi Oshiba, Kishio Tamura
-
Patent number: 8871419Abstract: The toner for electrostatic image development has excellent charge properties, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. The toner is composed of toner particles containing a binder resin. The process has an aggregating step of adding an aggregating agent containing a transition element into an aqueous medium of dispersed fine binder resin particles to aggregate the fine binder resin particles, and an aggregation-stopping step of adding an aggregation stopper composed on a sulfur atom-containing compound exhibiting a reducing action on the aggregating agent. The aggregating agent is a salt of a bivalent or higher metal selected from Sr, Ti, V, Cr, Mn, Fe, Co, Ni and Cu.Type: GrantFiled: June 18, 2012Date of Patent: October 28, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Saburou Hiraoka, Tomomi Oshiba, Mikihiko Sukeno, Tomoko Mine, Hitomi Motani, Tatsuya Nagase, Ken Ohmura
-
Patent number: 8785100Abstract: The present invention relates to a two-component developer which comprises a toner, and a carrier having a surface of a core material particle coated with a resin having a unit of general formula (1). The present invention provides a two-component developer which has enhanced environmental stability of carrier charging performance.Type: GrantFiled: December 27, 2012Date of Patent: July 22, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hitomi Motani, Tomoko Mine, Tomomi Oshiba
-
Publication number: 20140011132Abstract: The production process is a process for producing a toner for electrostatic image development. The process has an aggregating step of adding an aggregating agent composed of a compound having a divalent or trivalent metal element into a dispersion with fine particles of a binder resin dispersed in an aqueous medium, and an aggregation terminating step of adding an aggregation terminating agent into the dispersion. The aggregation terminating agent is composed of a compound having at least one of a structure (1) represented by a formula (1) and a structure (2) represented by a formula (2). In the formulae (1) and (2), R1 to R9 each independently represent a hydrogen atom, a hydroxy group or an organic group. At least one of R1 and R4or at least one of R5 and R6 represents a hydroxy group.Type: ApplicationFiled: December 4, 2012Publication date: January 9, 2014Inventors: Tomomi Oshiba, Tomoko Mine, Hitomi Motani, Saburou Hiraoka
-
Patent number: 8507169Abstract: A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.Type: GrantFiled: February 28, 2012Date of Patent: August 13, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tomoko Mine, Mikihiko Sukeno, Tatsuya Nagase, Tomomi Oshiba, Hiroyuki Kozuru, Saburou Hiraoka, Yoshiyasu Matsumoto, Kosuke Nakamura, Hitomi Motani, Takanari Kayamori
-
Publication number: 20130189612Abstract: The present invention relates to a two-component developer which comprises a toner, and a carrier having a surface of a core material particle coated with a resin having a unit of general formula (1). The present invention provides a two-component developer which has enhanced environmental stability of carrier charging performance.Type: ApplicationFiled: December 27, 2012Publication date: July 25, 2013Applicant: Konica Minolta Business Technologies, Inc.Inventors: Hitomi MOTANI, Tomoko MINE, Tomomi OSHIBA
-
Publication number: 20120328980Abstract: The toner for electrostatic image development has excellent charge properties, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. The toner is composed of toner particles containing a binder resin. The process has an aggregating step of adding an aggregating agent containing a transition element into an aqueous medium of dispersed fine binder resin particles to aggregate the fine binder resin particles, and an aggregation-stopping step of adding an aggregation stopper composed on a sulfur atom-containing compound exhibiting a reducing action on the aggregating agent. The aggregating agent is a salt of a bivalent or higher metal selected from Sr, Ti, V, Cr, Mn, Fe, Co, Ni and Cu.Type: ApplicationFiled: June 18, 2012Publication date: December 27, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Saburou HIRAOKA, Tomomi OSHIBA, Mikihiko SUKENO, Tomoko MINE, Hitomi MOTANI, Tatsuya NAGASE, Ken OHMURA
-
Publication number: 20120264050Abstract: Disclosed is a production process of a toner for electrostatic image development, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. The production process is a production process of a toner for electrostatic image development, is composed of toner particles containing a binder resin. The process has the steps of adding a aggregating agent containing polysilicato-iron into an aqueous medium in which fine binder resin particles formed of the binder resin have been dispersed, thereby aggregating the fine binder resin particles, and adding an aggregation stopper composed of a salt whose cation is univalent or bivalent.Type: ApplicationFiled: April 12, 2012Publication date: October 18, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tomomi OSHIBA, Hitomi MOTANI, Tomoko MINE, Saburou HIRAOKA, Mikihiko SUKENO, Tatsuya NAGASE, Ken OHMURA
-
Publication number: 20120225379Abstract: A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.Type: ApplicationFiled: February 28, 2012Publication date: September 6, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tomoko MINE, Mikihiko SUKENO, Tatsuya NAGASE, Tomomi OSHIBA, Hiroyuki KOZURU, Saburou HIRAOKA, Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Hitomi MOTANI, Takanari KAYAMORI
-
Publication number: 20110151371Abstract: A toner for electrostatic latent image development is disclosed, comprising colored particles containing a binder resin and a colorant, and an external-additive, wherein the external additive comprises boron nitride particles exhibiting a number average primary particle size of 10 to 500 nm. The production method of the toner is also disclosed.Type: ApplicationFiled: December 3, 2010Publication date: June 23, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Shinya OBARA, Masahiro ANNO, Satoshi UCHINO, Hitomi MOTANI, Hidehito HARUKI