Organic Nitrogen Or Organic Phosphorus Compound Adjuvant Patents (Class 430/108.2)
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Patent number: 8986916Abstract: A yellow toner including: a non-crystalline resin; C.I. Pigment Yellow 185; and a releasing agent, wherein the yellow toner has a glass transition temperature of more than 18° C. but less than 40° C.Type: GrantFiled: December 26, 2012Date of Patent: March 24, 2015Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Yamashita, Masana Shiba, Satoyuki Sekiguchi, Yukari Fukuda, Daisuke Asahina, Rintaro Takahashi, Tsuyoshi Sugimoto
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Patent number: 8945804Abstract: Treated metal oxide particles include metal oxide particles treated with at least a charge modifying agent. The charge modifying agent is represented by the following formula: An-Zc—Yb—Ar(EW)a wherein Ar represents an aromatic group, EW represents an electron withdrawing group, Y represents a spacer group, Z represents an alkylene group, An represents an anchor group, a is an integer from 1 to 5, b is 0 or 1, and c is 0 or 1. The treated metal oxide particles may also be treated with a second charge modifying agent or with a hydrophobicity-imparting agent. A toner composition including toner particles and treated metal oxide particles is also disclosed.Type: GrantFiled: July 9, 2008Date of Patent: February 3, 2015Assignee: Cabot CorporationInventors: Jinsong Liu, Hairuo Tu, Dmitry Fomitchev
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Patent number: 8927186Abstract: A toner for use in developing an electrostatic latent image is provided. The toner includes a colored particulate material including at least a binder resin and a colorant; and an external additive present on a surface of the colored particulate material and including a particulate crystalline hydroxyapatite. The particulate crystalline hydroxyapatite has an average aspect ratio of not less than 3 and less than 30.Type: GrantFiled: November 23, 2010Date of Patent: January 6, 2015Assignee: Ricoh Company, LimitedInventors: Masayuki Ishii, Toyoshi Sawada
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Publication number: 20140370433Abstract: This disclosure relates to a polymerized toner prepared by suspension polymerization. Particularly, this disclosure relates to a polymerized toner that comprises a binder resin, and a pigment, a charge control agent, and wax, which are dispersed in the binder resin, and maintains peak molecular weight (Mn) of the binder resin, the ratio of number average molecular weight/peak molecular weight (Mn/Mp), and gel content (Gel %), and thereby, can realize high glossiness and excellent off set property when printing, and a method for preparing the same.Type: ApplicationFiled: December 5, 2012Publication date: December 18, 2014Applicant: LG CHEM, LTD.Inventors: Wook Jang, Chang-Soon Lee, Joo-Yong Park, Woo-Cheul Jung
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Publication number: 20140370426Abstract: A non-magnetic single-component toner includes a toner base particle that contains at least a binder resin and a colorant, and an external additive, wherein the external additive includes an organic particle and an inorganic particle, the binder resin contains at least an amorphous polyester resin and a crystalline polyester resin, an endothermic peak of the crystalline polyester resin obtained by differential scanning calorimetry is from 50° C. to 100° C., the organic particle contains at least one kind selected from a group consisting of higher fatty acid, higher alcohol, fatty acid ester, and fatty acid amide, and the inorganic particle is treated with silicone oil.Type: ApplicationFiled: October 23, 2013Publication date: December 18, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Daisuke ISHIZUKA, Shinichi YAOI, Tomoaki TANAKA, Seijiro ISHIMARU, Kotaro YOSHIHARA, Yasushige NAKAMURA
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Publication number: 20140370428Abstract: Incorporation of organic amines as neutralization agents in based phase inversion emulsification (PIE) processes to provide emulsification of high molecular amorphous and high molecular branch amorphous polyester resins, which are traditionally difficult to emulsify. The organic amines facilitate emulsification of these resins to achieve desired particle size with a narrow size distribution.Type: ApplicationFiled: June 13, 2013Publication date: December 18, 2014Inventors: Yulin Wang, Shigang Steven Qiu, Ke Zhou, Karen Moffat, Edward G. Zwartz, Michael Hawkins, Paul Gerroir
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Patent number: 8911925Abstract: A liquid developer contains a carrier liquid, and toner particles containing a binder resin and a pigment surface-treated with a polyallylamine compound as a colorant.Type: GrantFiled: August 21, 2012Date of Patent: December 16, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiro Oki, Yoshihiro Inaba, Akira Imai, Daisuke Yoshino, Takako Kobayashi, Koji Horiba
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Patent number: 8906587Abstract: Provided is a colored resin powder which can reproduce even high lightness and saturation and has spectral reflectance characteristic having a wide gamut. The colored resin powder includes a water-insoluble coloring matter compound represented by the following general formula (1) and a binder resin: in which in the general formula (1), R1 and R2 each independently represent an alkyl group, and R3 represents one of an alkyl group, an aryl group, and an alkoxy group.Type: GrantFiled: October 23, 2012Date of Patent: December 9, 2014Assignee: Canon Kabushiki KaishaInventors: Masao Nakano, Yutaka Tani, Taichi Shintou, Takayuki Ujifusa, Satoshi Saito, Takeshi Miyazaki
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Patent number: 8883946Abstract: Here is provided a charge control resin which is prompt in charge rising up, excellent in electrostatic charging propensity and easy in manufacturing. This charge control resin contains a polymer as an active ingredient having a constituent unit represented by following Formula (1) in the Formula (1), R1 is independent of one another, and is a hydrogen atom, a hydroxyl group, a halogen atom, a carboxy-containing group, a straight-chained or branched alkyl group having 1-18 carbon atoms, or a straight-chained or branched alkoxy group having 1-18 carbon atoms; R2 is a hydrogen atom, a hydroxyl group, a halogen atom, a carboxy-containing group, a straight-chained or branched alkyl group having 1-18 carbon atoms, or a straight-chained or branched alkoxy group having 1-18 carbon atoms; g is a number of 1-3; h is a number of 1-3; and M is a hydrogen atom, an alkali metal, a straight-chained or branched alkyl group having 1-18 carbon atoms, an ammonium radical or a mixture of any of these.Type: GrantFiled: May 17, 2012Date of Patent: November 11, 2014Assignee: Orient Chemical Industries Co., Ltd.Inventors: Masashi Yasumatsu, Kaori Inoue, Satoko Ozaki
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Patent number: 8877414Abstract: An electrostatic image developing toner including: a toner matrix particle having an adhering particle adhered onto the surface of a central particle, wherein a volume average value of a ratio X of a peripheral length PM to a circle-corresponding diameter D is from 3.6 to 5.0.Type: GrantFiled: February 22, 2011Date of Patent: November 4, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Atsushi Sugawara, Shinpei Takagi, Atsushi Sugitate, Daisuke Noguchi
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Patent number: 8871414Abstract: Domains of a charge control resin are formed by dispersing a charge control resin containing a quaternary ammonium salt functional group-containing resin of a copolymer of an addition-polymerizable monomer having a quaternary ammonium salt functional group and a styrene and/or acrylic monomer into a polyester resin as binder resin, and the proportion of the number of domains of the charge control resin with a domain diameter of no less than 0.01 ?m to less than 0.3 ?m versus the number of domains of the charge control resin with a domain diameter of no less than 0.01 ?m, which is measured by a predetermined method, is adjusted to no less than 98% by number.Type: GrantFiled: January 24, 2012Date of Patent: October 28, 2014Assignee: Kyocera Document Solutions Inc.Inventors: Masami Tujihiro, Toshiki Takemori
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Patent number: 8871413Abstract: An object of the invention is to provide a toner which is effective in improving image quality while inhibiting white-background fouling, residual-image phenomenon (ghost), blurring (suitability for solid printing), and the like that occur depending on the proportion of a fine powder having a particle diameter not larger than a specific value, and which has satisfactory removability in cleaning, mitigates problems concerning fouling, etc. in long-term use even on a high-speed printer, and attains excellent image stability. Another object is to provide an image-forming apparatus and a toner cartridge each employing the toner. The invention provides a toner for electrostatic-image development satisfying all of the following (1) to (4) or a toner for electrostatic-image development which is a toner containing a charge control agent and satisfying all of the following (5) to (7). The invention further provides an image-forming apparatus and a toner cartridge each employing the toner.Type: GrantFiled: September 19, 2008Date of Patent: October 28, 2014Assignee: Mitsubishi Chemical CorporationInventors: Yuzo Kaneko, Masaya Oota, Shiho Sano, Masakazu Sugihara, Teruki Senokuchi, Shiro Yasutomi, Takeshi Owada, Yumi Hirabaru, Takuya Nishikiori, Teruyuki Mitsumori, Kozo Ishio, Hiroaki Takamura
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Patent number: 8865384Abstract: An electrophotographic toner, including: a binder resin; a colorant; and an organically-modified layered inorganic mineral, wherein the binder resin contains 50% by mass or more of a crystalline resin relative to the binder resin, and the crystalline resin contains a resin having a sulfonic acid group, and wherein an amount of the sulfonic acid group is 0.1% by mass to 2.0% by mass relative to the resin having the sulfonic acid group.Type: GrantFiled: March 8, 2013Date of Patent: October 21, 2014Assignee: Ricoh Company, Ltd.Inventors: Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Hideyuki Santo, Shingo Sakashita, Yukiko Nakajima, Suzuka Amemori, Akiyoshi Sabu
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Publication number: 20140272339Abstract: A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventors: Dinesh Tyagi, Chung-Hui Kuo, Louise Granica
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Patent number: 8828633Abstract: To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content “a” of the unit A in the toner particle is 2.00 ?mol/g or more, and a molar ratio b/a of the content “a” and a content “b” of the unit B in the toner particle is 0.10 or more and 10.00 or less.Type: GrantFiled: December 20, 2010Date of Patent: September 9, 2014Assignee: Canon Kabushiki KaishaInventors: Hitoshi Itabashi, Takashi Kenmoku, Harumi Takada
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Patent number: 8822117Abstract: The present invention relates to a chemical toner composition and a method for preparing the same. The chemical toner composition includes: a resin emulsion; a pigment dispersion; a wax dispersion; and a dispersible polymer coagulant, wherein the dispersible polymer coagulant is a copolymer comprising unsaturated ester monomers and amino-containing monomers. Accordingly, the present invention uses a novel dispersible polymer coagulant to prepare uniform toner particles with excellent roundness and improved flowability and to reduce moisture absorption.Type: GrantFiled: December 16, 2008Date of Patent: September 2, 2014Assignee: Trend Tone Imaging, Inc.Inventors: Kuei-Ying Chiu, Kuo-Tong Huang, Ju-Feng Liao, I-Jein Cheng, Jui-Fa Chang, Chien-Sheng Huang, Yi-Ling Liu
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Patent number: 8815483Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.Type: GrantFiled: September 1, 2011Date of Patent: August 26, 2014Assignee: Fuji Xerox., Ltd.Inventors: Akira Matsumoto, Yusuke Ikeda, Eiji Nakai
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Patent number: 8802340Abstract: The invention provides an electrophotographic toner having at least: a binder resin, a coloring agent, and an alkali metal salt of polyethylene oxide. The invention further provides an electrophotographic developer having the electrophotographic toner, a process cartridge having a developer bearing body which accommodates the electrophotographic developer, and an image forming apparatus having a toner image forming member that forms a toner image on a recording medium by using the electrophotographic developer and a fixing member that fixes the toner image by heating and pressurizing or by photoirradiation. The processing speed in image formation using the image forming apparatus can be about 1,000 mm/sec or more.Type: GrantFiled: July 9, 2008Date of Patent: August 12, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yasushige Nakamura, Shinichi Yaoi
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Patent number: 8790855Abstract: The present invention provides a charge control agent containing, as an active substance(s), one or two or more thiazolidinedione derivatives represented by the following formula (1), where R1 represents a hydrogen atom, etc.; R2 represents a hydrogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc.; R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a chlorine atom, a linear or branched alkyl group having 1 to 8 carbon atoms which may have a substituent, etc., and may be joined to each other to form a ring; and V, W, X, Y and Z represent a carbon atom or a nitrogen atom, and 0 to 3 of any of V, W, X, Y and Z are nitrogen atoms which do not have the substituents of R3 to R7.Type: GrantFiled: September 1, 2011Date of Patent: July 29, 2014Assignee: Hodogaya Chemical Co., LtdInventors: Ikuo Kimura, Motonori Tsuji, Masami Ito, Masaya Tojo, Kanae Hiraishi
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Patent number: 8778582Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which the toner particles are made without a shell which provides homogenous distribution of the charge control agents, providing a toner with higher charge and better environmental stability.Type: GrantFiled: November 1, 2012Date of Patent: July 15, 2014Assignee: Xerox CorporationInventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang
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Patent number: 8778583Abstract: A toner including a mother particle and an external additive covering a surface of the mother particle is provided. The mother particle includes a binder resin, a colorant, and a release agent. The external additive includes a particulate cellulose having a number average particle diameter within a range of 15 to 105 nm.Type: GrantFiled: November 16, 2012Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Masayuki Ishii, Toyoshi Sawada
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Patent number: 8778584Abstract: The present disclosure provides toners and methods for their production. In embodiments, the amount of coagulant utilized in producing those toners may be less than amounts currently in use, which may have a beneficial effect by reducing the time for coalescence. Modified waxes may also be utilized which provide excellent gloss and charging characteristics.Type: GrantFiled: October 15, 2009Date of Patent: July 15, 2014Assignee: Xerox CorporationInventors: Mark E. Mang, Grazyna Kmiecik-Lawrynowicz, Maura A. Sweeney, Timothy L. Lincoln
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Patent number: 8771911Abstract: A magenta toner for electrophotography, including: toner particles containing, a polyester resin, a coloring agent containing a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, a release agent, and inorganic particles; and an external additive, wherein an average particle diameter of the inorganic particle is 0.75 times or more the average particle diameter of the coloring agent.Type: GrantFiled: May 3, 2012Date of Patent: July 8, 2014Assignee: Fuji Xerox, Co., Ltd.Inventors: Satoshi Kamiwaki, Akira Matsumoto, Yusuke Ikeda, Yukiaki Nakamura, Masanobu Ninomiya
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Publication number: 20140186759Abstract: An electrostatic charge image development toner contains a plurality of toner particles. The plurality of toner particles are each formed to have resin particulates in a surface layer. The resin particulates each include a particulate core and a coating layer covering the particulate core. The particulate core contains a quaternary ammonium salt functional group-containing resin. The coating layer contains one or more resins selected from the group consisting of (meth)acrylic resins and styrene-(meth)acrylic resins.Type: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventor: Seiji KIKUSHIMA
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Publication number: 20140170551Abstract: The disclosure describes an emulsion aggregation toner process wherein aspartic acid derivatives are employed as chelating agents. Also disclosed is a process for preparing toner using aspartic acid derivatives to freeze/stop toner particle growth where coalescence occurs following acidification of the reaction mixture.Type: ApplicationFiled: December 17, 2012Publication date: June 19, 2014Applicant: XEROX CORPORATIONInventors: Ke Zhou, Kimberly D. Nosella, Jordan H. Wosnick, Karen A. Moffat, Richard PN Veregin, Santiago Faucher
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Patent number: 8728697Abstract: A carrier for electrostatic image development includes: a carrier body including a core and a resin coating layer on the core; and first spherical silica particles having a volume-average particle diameter of from 50 nm to 300 nm that adhere to the surface of the carrier body at a ratio of from 0.001 parts by weight to 0.100 parts by weight relative to 100 parts by weight of the carrier body.Type: GrantFiled: August 12, 2010Date of Patent: May 20, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Daisuke Ishizuka
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Publication number: 20140134530Abstract: Two-component developer includes positively chargeable toner and a carrier. The carrier is formed of a carrier core and a coating layer that covers the carrier core. The coating layer includes one or more types of fluorine-containing resin selected from the group consisting of fluorine containing polyimide resin and fluorine containing polyamide-imide resin. The positively chargeable toner includes binder resin and a charge control agent. A content of the charge control agent is 1.0% by mass or higher and 5.0% by mass or lower relative to a mass of the toner.Type: ApplicationFiled: November 14, 2013Publication date: May 15, 2014Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventor: Noriaki SAKAMOTO
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Patent number: 8722292Abstract: The invention relates to an electrostatic image developing toner comprising at least one of a phthalocyanine type compound and a naphthalocyanine type compound and at least one compound represented by the following structural formulae (1) to (10): wherein R1 to R57 respectively represent a hydrogen atom, an alkyl group, an aryl group, an arylalkyl group, an amino group, a halogen group, an alkoxy group, an alkylthio group, a nitro group, a hydroxy group, a thiol group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylcarbonylamino group, an alkoxycarbonylamino group, a carboxyamide group or a nitroimino group, wherein among R1 to R57, any two adjacent Rs may form a carbon ring and any two Rs connected to the same carbon atom may form an oxo group, an imino group or a thioxo group.Type: GrantFiled: April 10, 2008Date of Patent: May 13, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Shigeru Seitoku
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Publication number: 20140127620Abstract: A toner particle has a core and a shell surrounding the core, wherein the shell contains a polymerized charge enhanced spacer particle, which is a copolymer of a charge control agent and a monomer. A method of making toner particles includes forming a slurry by mixing together a first emulsion containing a resin, optionally a wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additive, heating the slurry to form aggregated particles in the slurry, forming a second emulsion containing a monomer and a charge control agent, polymerizing the second emulsion to form a copolymer of the monomer and the charge control agent, and incorporating the copolymer into the toner particles, wherein the aggregated particles form a core of the toner particles.Type: ApplicationFiled: November 2, 2012Publication date: May 8, 2014Applicant: XEROX CORPORATIONInventors: Robert D. BAYLEY, Maura A. SWEENEY, Grazyna E. KMIECIK-LAWRYNOWICZ
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Publication number: 20140120465Abstract: A method for producing a toner for electrostatic image development including the step of melt-kneading a mixture containing a resin binder and a wax, wherein the resin binder contains an amorphous polyester (A) obtained by polycondensing an alcohol component containing an aliphatic diol (a) having 3 or 4 carbon atoms, the aliphatic diol having a hydroxyl group bonded to a secondary carbon atom, and an aliphatic diol (b) containing one or more ?,?-linear alkanediols having 2, 4, 6 or 8 carbon atoms, and a carboxylic acid component.Type: ApplicationFiled: October 4, 2013Publication date: May 1, 2014Applicant: Kao CorporationInventors: Shogo WATANABE, Takeshi ASHIZAWA, Takashi KUBO, Norihiro HIRAI
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Publication number: 20140113227Abstract: An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10° C.?Ma-Mb?45° C.Type: ApplicationFiled: June 6, 2013Publication date: April 24, 2014Inventors: Tomohiro SHINYA, Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO
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Patent number: 8691484Abstract: Disclosed is a non-magnetic toner for use in developing electrostatic toner image, wherein the toner is produced by a toner production method that includes: dispersing in an aqueous medium an organic dispersion liquid that comprises in an organic solvent a pigment, a binder resin and/or a binder resin precursor, and a releasing agent; removing the organic solvent to prepare a dispersion slurry in which toner particles are dispersed in the aqueous medium; heating the dispersion slurry to a temperature equal to or higher than the melting point of the releasing agent; and washing the toner particles.Type: GrantFiled: March 12, 2008Date of Patent: April 8, 2014Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Nozaki, Chiyoshi Nozaki, Atsushi Yamamoto, Mitsuyo Matsumoto, Takuya Kadota, Katsunori Kurose, Yoshimichi Ishikawa
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Patent number: 8685607Abstract: The continuous process for manufacturing toners disclosed herein includes continuously feeding components of a toner composition into a feed section of a screw extruder at a controlled rate. The continuous process for manufacturing toners may include feeding the components of a toner composition into the feed section of a screw extruder without performing an external or secondary dispersion step. That is to say, the components of the toner composition may be fed directly into the extruder without using dispersions of individual components as used in batch processes. Rather, the toner components are added to the extruder in dry form, melt-mixed, and may be dispersed in aqueous form in the extruder. The process may produce micron-sized toner particles, thus no further size reduction may be necessary.Type: GrantFiled: August 29, 2012Date of Patent: April 1, 2014Assignee: Xerox CorporationInventors: Joo T. Chung, Chieh-Min Cheng, Zhen Lai, Mark E. Mang, Eugene F. Young, Brian Andaya, Joseph Leonardo
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Publication number: 20140087299Abstract: A toner including toner particles, each of which comprising a charging component, a polymer having a partial structure represented by the following formula (1) as the side chain, and a colorant: (R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; m represents an integer of 0 to 3; if m is 2 or 3, R1 can be each independently selected; n represents an integer of 1 to 3; and * represents a coupling site in the polymer.Type: ApplicationFiled: May 17, 2012Publication date: March 27, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Kenmoku, Hitoshi Itabashi, Akane Masumoto
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Patent number: 8679714Abstract: A toner including: a first binder resin; a colorant; a releasing agent; and a crystalline organic compound, wherein the first binder resin contains an amorphous polyester resin (a) having a polyhydroxycarboxylic acid skeleton derived from optically active monomers in a part of a main chain of the amorphous polyester resin, and the polyhydroxycarboxylic acid skeleton has an optical purity X, calculated on the monomer basis, of 80% or less, and the optical purity X is determined from the equation, Optical Purity X (%)=|X(L-form)?X(D-form)| wherein the crystalline organic compound is any one of a crystalline polyester resin (b) and a crystalline low molecular compound having a melting point of 60° C. to 100° C., and being selected from a group consisting of fatty acid having 16 to 24 carbon atoms, alcohol having 16 to 24 carbon atoms, a fatty acid ester compound, and aliphatic carboxylic acid amide.Type: GrantFiled: September 9, 2010Date of Patent: March 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Ryota Inoue, Akihiro Kotsugai, Yoshihiro Moriya, Akiyoshi Sabu, Shingo Sakashita, Keiko Osaka, Yukiko Nakajima, Yoshitaka Yamauchi, Daiki Yamashita
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Patent number: 8673527Abstract: The present disclosure provides toners and processes for making said toners. In embodiments, the toners include a fluorescent additive having a fluorescent agent. Toners are colorless when viewed under natural light but when exposed to UV light of a specific wavelength the toners are rendered bright green due to the presence of the fluorescent agent.Type: GrantFiled: August 23, 2010Date of Patent: March 18, 2014Assignee: Xerox CorporationInventors: Suxia Yang, Richard P. N. Veregin, Gabriel Iftime, Jordan H. Wosnick, Cuong Vong, Paul J. Gerroir, Eric Rotberg, Karen Ann Moffat, Daryl W. Vanbesien
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Patent number: 8673528Abstract: A toner including at least one polyester resin serving as a binder resin, a colorant, a releasing agent, and a fixing aid, wherein the fixing aid includes a fatty acid amide-based compound, and the fatty acid amide-based compound is at least one of a fatty acid amide compound having a mono- or higher valent amide bond and a fatty acid amide-based compound having a mono- or higher valent amino group or a hydroxyl group.Type: GrantFiled: May 22, 2009Date of Patent: March 18, 2014Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu, Masaki Watanabe, Satoshi Ogawa, Masana Shiba, Junichi Awamura, Naohito Shimota
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Publication number: 20140072908Abstract: A toner including toner particles containing a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent is a polymer A having a structure “a” represented by formula (1), and the polymer A has a weight average molecular weight (Mw) of 1,000 to 100,000: wherein R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, and g represents an integer of 1 to 3 and h represents an integer of 0 to 3, wherein when h is 2 or 3, R1 can be each independently selected.Type: ApplicationFiled: May 17, 2012Publication date: March 13, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Akane Masumoto, Hitoshi Itabashi, Takashi Kenmoku
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Patent number: 8658340Abstract: A toner containing a binder resin comprising a first binder resin A and a second binder resin B, a coloring agent, and a releasing agent, wherein the first binder resin A is formed by reacting a compound A1 having an active hydrogen group with a resin A2 having a portion reactive with the compound A1 in an organic solvent and the resin A2 is formed by reacting a non-crystalline polyester resin “a” having a polyhydroxy carboxylic acid skeleton in the main chain with a compound having the portion reactive with the compound A1 having an active hydrogen group.Type: GrantFiled: May 9, 2011Date of Patent: February 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Shinya Nakayama, Ryota Inoue, Yoshihiro Moriya, Akiyoshi Sabu, Yukiko Nakajima, Daiki Yamashita
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Patent number: 8652720Abstract: Environmentally friendly latex particles are provided which include a gelling agent and a pigment encapsulated in an amorphous resin which may be utilized in forming EA super low melt toners. Methods for providing these resins and toners are also provided.Type: GrantFiled: May 11, 2011Date of Patent: February 18, 2014Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Ke Zhou, Michelle N. Chretien, Edward Graham Zwartz, Guerino G. Sacripante
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Patent number: 8652721Abstract: A toner is provided including a mother particle and an external additive covering the surface of the mother particle. The mother particle includes a binder resin and a release agent. The external additive includes a hydroxyapatite silica complex porous particle having a number average particle diameter of 160 nm or less.Type: GrantFiled: January 26, 2012Date of Patent: February 18, 2014Assignee: Ricoh Company, Ltd.Inventor: Masayuki Ishii
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Patent number: 8647799Abstract: An erasable toner is prepared by mixing colored particles containing at least a color former compound, a color developer agent and a binder resin with de-coloring particles having a melting point higher than the fixing temperature of the colored particles. By using this toner, a colored image is formed by electrostatically transferring a toner image onto a medium, and heating the toner image at a temperature lower than the melting point of the de-coloring particles to form a fixed toner image in a color developed state, and the color of the fixed image is erased by heating the image to a temperature not lower than the melting point of the de-coloring particles. In this toner, the color developing function and the color erasing function are assigned to different particles so that the functions are separated from each other, and therefore, the formation of an image in a color developed state and the erasure thereof can be reliably and promptly achieved.Type: GrantFiled: November 24, 2010Date of Patent: February 11, 2014Assignee: Toshiba Tec Kabushiki KaishaInventors: Tsuyoshi Itou, Takayasu Aoki
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Patent number: 8632932Abstract: A toner including a binder resin comprising a resin (a) comprising a polyhydroxycarboxylic acid skeleton formed from an optically-active monomer. The polyhydroxycarboxylic acid skeleton has a weight average molecular weight of from 7,000 to 60,000. The binder resin comprises the polyhydroxycarboxylic acid skeleton in an amount of from 10 to 90% by weight. The optical purity X (%) of the polyhydroxycarboxylic acid skeleton represented by the following formula is 80% or less: X(%)=|X(L-isomer)?X(D-isomer)| wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.Type: GrantFiled: December 30, 2009Date of Patent: January 21, 2014Assignee: Ricoh Company, LimitedInventors: Akiyoshi Sabu, Akihiro Kotsugai, Ryota Inoue, Keiko Osaka, Shingo Sakashita, Yukiko Nakajima, Satoshi Mochizuki
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Publication number: 20140004459Abstract: The present invention is a toner for developing electrostatic charge image containing a wax derived from a plant cholesterol, an electric charge-controlling agent, a coloring agent and a binding resin. The toner is suited for use in the electromagnetic induction-heated fixing system which is capable of heating the heating member up to a predetermined fixing temperature in a short period of time, makes it possible to maintain images free of irregular luster or fouling for extended periods of time and is, further, suited for being fixed at a low temperature.Type: ApplicationFiled: March 27, 2012Publication date: January 2, 2014Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masaki Okubo, Tasuji Orita, Hideyuki Otsuka, Kenichi Sato, Kanae Hiraishi
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Patent number: 8592117Abstract: A toner including: a binder resin component; crystal nucleating agent; releasing agent; and colorant, wherein the binder resin component contains a crystalline polyester resin and a non-crystalline polyester resin, the crystal nucleating agent is at least one of an aliphatic ester compound and an aliphatic amide compound each having a melting point of 60° C. or higher but lower than 150° C., and wherein the toner satisfies Expressions (I) and (II): Tc>Tp+10??Expression (I) Tm>Tp+2??Expression (II) where Tp denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystalline polyester resin, Tc denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystal nucleating agent, and Tm denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve through DSC of the mixture of the crystalline polyester resin and the crystal nucleating agent.Type: GrantFiled: December 23, 2011Date of Patent: November 26, 2013Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Masaki Watanabe, Satoyuki Sekiguchi, Rintaro Takahashi
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Patent number: 8592113Abstract: A toner including a mother toner comprising a binder resin and a calixarene having a halogen group, and a charge controlling agent having a halogen group that is present on a surface of the mother toner. The ratio of halogen ion to carbon ion on a surface of the toner is from 0.01 to 0.5, when determined by TOF-SIMS. The toner can be prepared by preparing a first liquid by dissolving or dispersing toner components including a calixarene having a halogen group and a binder resin and/or a precursor of the binder resin in an organic solvent; preparing a second liquid by emulsifying or dispersing the first liquid in an aqueous medium; removing the organic solvent from the second liquid; preparing a third liquid by washing the second liquid from which the organic solvent is removed; and adding a charge controlling agent having a halogen group to the third liquid.Type: GrantFiled: October 6, 2010Date of Patent: November 26, 2013Assignee: Ricoh Company, LimitedInventors: Masaki Watanabe, Hiroshi Yamashita, Tomoh Kubo
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Patent number: 8586272Abstract: The present disclosure provides toner compositions able to prevent the formation of mold or bacterial growth during storage. In embodiments, toners may include at least one biocide that prevents the formation of mold and/or bacteria in a toner composition, including any emulsion that may be utilized in forming the toner composition. In embodiments, the biocide may also improve charging characteristics of the toner.Type: GrantFiled: July 28, 2009Date of Patent: November 19, 2013Assignee: Xerox CorporationInventors: Kimberly D. Nosella, Maria N. V. McDougall, Melanie Lynn Davis
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Publication number: 20130295341Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.Type: ApplicationFiled: May 2, 2012Publication date: November 7, 2013Inventors: Dinesh Tyagi, Louise Granica
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Publication number: 20130295500Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.Type: ApplicationFiled: March 15, 2013Publication date: November 7, 2013Inventors: Dinesh Tyagi, Louise Granica
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Publication number: 20130280648Abstract: A toner composition including at least one phosphorescent pigment that absorbs energy released by natural or artificial light, and is able to be seen in a dark environment through luminescence of a certain color created by the energy released as light, and a method of forming and using the toner are described. The phosphorescent toner has a particle size in the range of about 15-40 microns, which allows the toner to have the ability to absorb and then release the needed amount of light energy to be noticeable in a dark environment.Type: ApplicationFiled: April 18, 2012Publication date: October 24, 2013Applicant: TROY GROUP, INC.Inventors: Carrie A. Gilson, Kevin L. Heilman, Michael R. Rlley