Patents Examined by Christopher Rodee
  • Toner compositions and processes
    Patent number: 8980520
    Abstract: Toners are provided, which possess low melt properties capable of producing a low gloss finish. Methods for providing these resins and toners are also provided which include the process of controlling the gloss of the toner utilizing a slow acid addition during coalescence optionally combined with little or no chelating agent added during the aggregation process.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: March 17, 2015
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Daryl W. Vanbesien, Jordan H. Wosnick, Karen Ann Moffat
  • Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and method of manufacturing electrophotographic photosensitive member
    Patent number: 8980509
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component ? and a component ?, and a domain comprising a component ?.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda, Shio Murai, Harunobu Ogaki
  • UV red fluorescent EA toner
    Patent number: 8974993
    Abstract: The present disclosure relates to a toner design for a clear UV red fluorescence toner having a high lanthanide complex pigment loading, including methods of making the fluorescence toner using a saccharide or a sugar acid to avoid complexation of lanthanide ions from the pigment, with lower aggregation and coalescence temperatures in the preparation of toner particles, where the particles exhibit a narrow size distribution and good xerographic performance.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 10, 2015
    Assignee: Xerox Corporation
    Inventors: Roxan Richards-Johnson, Jordan H Wosnick, Karen A Moffat, Edward Graham Zwartz, Britawit Asfaw, Richard P N Veregin, Cuong Vong, Eric Rotberg
  • Method of image forming with a photoreceptor and toner
    Patent number: 8974998
    Abstract: A method of forming an image including an electrophotographic photoreceptor and a toner, wherein a photosensitive layer in the electrophotographic photoreceptor includes an undercoat layer including metal oxide particles, a charge generation layer including hydroxygallium phthalocyanine, and a charge transport layer, and the toner contains toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies—0.0517EXP(22.4/Dv50)?Dns?0.233EXP(17.3/Dv50) where Dv50 is the volume median diameter (?m) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 10, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Kozo Ishio, Hiroaki Takamura, Masaya Oota, Shiho Sano, Takeshi Oowada, Masakazu Sugihara, Teruki Senokuti, Shiro Yasutomi, Yumi Hirabaru
  • Charge transporting film, photoelectric conversion device, electrophotographic photoreceptor, process cartridge, and image forming apparatus
    Patent number: 8962225
    Abstract: A charge transporting film includes a cured film of a composition containing at least one selected from reactive compounds represented by the following Formula (I): wherein F represents a charge transporting skeleton, D represents a group represented by Formula (IIa), m represents an integer of from 1 to 8, E represents a group represented by Formula (IIb), L represents a (n+1)-valent linking group including two or more selected from the group consisting of an alkylene group, an alkenylene group, —C(?O)—, —N(R)—, —S—, —O—, and a trivalent or tetravalent group derived from alkane or alkene, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, n represents an integer of from 1 to 3, R0 represents a halogen atom, an alkyl group, or an alkoxy group, and n0 represents an integer of from 0 to 3.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tomoya Sasaki, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Kenji Kajiwara, Yuko Iwadate
  • Production process of polymerized toner
    Patent number: 8962232
    Abstract: A production process of a polymerized toner composed of polymer particles, including a step of polymerizing a polymerizable monomer composition containing a colorant and a polymerizable monomer in the presence of a polymerization initiator in an aqueous dispersion medium, wherein, in a stripping treatment step, the dispersion containing the polymer particles is introduced into an evaporator to conduct the stripping treatment by a method, in which a gas is blown into the dispersion within the evaporator to discharge volatile organic components including an unreacted polymerizable monomer out of the evaporator concomitantly with the gas, and both inert gas and saturated steam are used as the gas blown into the dispersion.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: February 24, 2015
    Assignee: Zeon Corporation
    Inventor: Keita Sensui
  • Treated metal oxide particles and toner compositions
    Patent number: 8945804
    Abstract: 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: Grant
    Filed: July 9, 2008
    Date of Patent: February 3, 2015
    Assignee: Cabot Corporation
    Inventors: Jinsong Liu, Hairuo Tu, Dmitry Fomitchev
  • Magenta toner containing compound having AZO skeleton
    Patent number: 8936894
    Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a magenta pigment.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Toyoda, Yasuaki Murai, Waka Hasegawa, Yuki Hasegawa, Masashi Kawamura, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
  • Toner and developer
    Patent number: 8932789
    Abstract: To provide a toner, which contains: a non-crystalline polyester resin A obtained through a reaction between a non-linear chain reactive precursor and a curing agent, and having a glass transition temperature of ?60° C. to 0° C.; a non-crystalline polyester resin B having a glass transition temperature of 40° C. to 70° C.; and a crystalline polyester resin C, wherein the toner has a glass transition temperature Tg1st of 20° C. to 40° C. as measured with first heating in differential scanning calorimetry (DSC).
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Satoyuki Sekiguchi, Rintaro Takahashi, Masana Shiba, Yukari Fukuda, Saki Konno
  • Toner, developer, and image forming method
    Patent number: 8932788
    Abstract: The present invention provides a toner containing at least a binder resin and a pigment, wherein the amount of the pigment in the toner is 3.0% by mass to 8.5% by mass, the volume average particle diameter of the toner is 2.0 ?m to 6.0 ?m, and a monochrome image, which has been fixed on a recording medium so that the amount of the toner adhered onto the recording medium is 0.25 mg/cm2, has a reflection density of 1.2 to 2.5.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichi Wakamatsu, Hiroshi Yamashita, Naohiro Watanabe, Tsuyoshi Sugimoto
  • Cyan toner containing compound having azo skeleton
    Patent number: 8927187
    Abstract: A cyan toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a phthalocyanine pigment serving as a colorant.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuaki Murai, Takayuki Toyoda, Waka Hasegawa, Yuki Hasegawa, Masashi Kawamura, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
    Patent number: 8921020
    Abstract: Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer, which is provided on the support, in which: a surface layer of the electrophotographic photosensitive member includes a terminal siloxane-containing polyester resin having a specific structure; and a lower layer provided in contact with the surface layer includes a polycarbonate resin, a polyester resin, or a polyvinyl acetal resin, having a specific structure.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: December 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shio Murai, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda
  • Black toner containing compound having azo skeleton
    Patent number: 8916318
    Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure are linked, and carbon black.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuki Hasegawa, Yasuaki Murai, Waka Hasegawa, Takayuki Toyoda, Masashi Kawamura, Masatake Tanaka, Masashi Hirose
  • Method for selecting developer, developer, and image formation device
    Patent number: 8889328
    Abstract: A developer to develop an electrostatic latent image satisfying the requirements of 0.85?Q60/Q600 and 10?Q600?20, where Q60 (??C/g) represents a charge amount of the developer when a sample, made by adding the developer to a carrier such that the concentration of the developer is 5%, is shaken for 60 seconds, and Q600 (??C/g) represents a charge amount of the developer when shaken for 600 seconds under the same conditions.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: November 18, 2014
    Assignee: Oki Data Corporation
    Inventor: Hayato Matsumoto
  • Toner, development agent, and image formation method
    Patent number: 8889330
    Abstract: A toner including a mother toner particle having a core-shell structure formed of a core containing a binder resin, a coloring agent, and an optional releasing agent, and a shell having a layer thickness of from 0.01 to 2.00 ?m, the core having a softening index of from 60 to 85° C. as measured by a flow tester, and the shell having a thermal hardness of from 0.7 to 1.8 m, and an optional external additive.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: November 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Sugiura, Yuka Mizoguchi
  • Toner for developing electrostatic images
    Patent number: 8889327
    Abstract: A toner for developing electrostatic images contains a binder resin, a colorant, a release agent, and a charge control agent. The release agent contains a wax having a polar group. The toner for developing electrostatic images has tan ? of 1 to 2 at a temperature of 80° C. to 145° C. as measured with a viscoelasticity measuring apparatus at a frequency of 10 Hz and a shear stress of 500 Pa, and has a breaking point of 180° C. or less in a temperature-tan ? curve.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: November 18, 2014
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Toshiki Takemori
  • Carrier core particle for electrophotographic developer, carrier for electrophotographic developer and electrophotographic developer
    Patent number: 8883388
    Abstract: A carrier core particle for an electrophotographic developer including a core composition expressed by a general formula: (MnxMgyCaz) FeWO4+V (x+y+z+w=3, ?0.003<v) as a main ingredient, wherein 0.05?y?0.35 and 0.005?z?0.024.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: November 11, 2014
    Assignees: Dowa Electronics Materials Co., Ltd., Dowa IP Creation Co., Ltd.
    Inventors: Takeshi Kawauchi, Yukihiro Matsuda
  • Developing method and image forming method
    Patent number: 8877418
    Abstract: The developing method includes developing an electrostatic latent image on an image bearing member with a two-component developer including a toner and a carrier and born on at least one developer bearing member, whose surface moves at a linear speed of from 300 mm/sec to 2,000 mm/sec. The carrier includes a particulate core material; and a cover layer located on a surface of the core material and including a crosslinked material obtained by crosslinking a resin including a first unit having a specific tris(trialkylsiloxy) silyl group and a second unit having a specific alkoxysilyl group having a crosslinking ability. Each of the first unit and the second unit is included in the resin in a molar ratio of from 0.1 to 0.9 based on all the units included in the resin.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 4, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Nakajima, Kimitoshi Yamaguchi, Shigenori Yaguchi, Hitoshi Iwatsuki, Toyoaki Tano, Mariko Takii, Minoru Masuda, Koichi Sakata, Saori Yamada, Hiroyuki Kishida
  • Toner for electrostatic image development
    Patent number: 8871415
    Abstract: There is provided a toner for electrostatic-image development that can obtain heat-resistant storability, fixed image strength and long-term stability of charging while having excellent low-temperature fixing property. The toner is formed, with toner particles containing a binder resin and a crystalline ester compound, and the binder resin contains a styrene-acrylic resin including a structural unit derived from an acrylic ester monomer.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: October 28, 2014
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroshi Nagasawa, Kouji Sugama, Hiroyuki Konno, Takaki Kawamura
  • Toner, two component developer, process cartridge and color image forming apparatus
    Patent number: 8871418
    Abstract: A toner containing: a core containing at least a first binder resin, a colorant, and a releasing agent; and a shell containing at least a second binder resin; wherein the toner has a core-shell structure, and has a softening index of 86° C. to 95° C. and a thermal hardness of 0.7 to 1.8.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Sugiura, Yuka Mizoguchi