Toner Image Transfer Patents (Class 430/125.3)
  • Patent number: 11106149
    Abstract: Provided is an image forming method using an electrophotographic photoreceptor provided with a photosensitive layer and a protective layer in this order on a conductive support, and a toner, and the image forming method containing a charging step, an exposure step, a development step, a transfer step, a fixing step, and a cleaning step, wherein the protective layer contains at least a cured resin obtained by curing a polymerizable compound; the toner contains 50% by number or more of toner particles having a shape factor calculated by the equation (1) in the range of 1.2 to 1.6, and a variation coefficient of the shape factor is 16% or less; and the toner contains alumina particles having a number average particle diameter in the range of 5 to 60 nm and silica particles having a number average particle diameter in the range of 80 to 200 nm.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: August 31, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomoko Mine, Michiyo Fujita, Ryuichi Hiramoto, Kaori Matsushima
  • Patent number: 10824105
    Abstract: The image forming apparatus includes an image bearing member, a charge member, a transfer unit, an application unit, a cleaning member, a detection unit that detects an index value, and a control unit that, in a case where one or a plurality of consecutive toner images for which the index value is equal to or greater than a first threshold value is formed, performs control which increases an absolute value of the transfer voltage for a toner image to be formed next, and in a case where one or a plurality of consecutive toner images for which the index value is less than a second threshold value equal to or greater than the first threshold value is formed, performs control which decreases an absolute value of the transfer voltage for a toner image to be formed next.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: November 3, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoaki Nakai, Yusaku Iwasawa
  • Patent number: 10747130
    Abstract: Provided is a process cartridge including: an electrophotographic photoreceptor; a charging unit configured to charge the electrophotographic photoreceptor through abutment against the electrophotographic photoreceptor; a developing unit configured to develop an electrostatic latent image formed on the electrophotographic photoreceptor with a toner to form a toner image; and a cleaning unit configured to remove the toner on the electrophotographic photoreceptor by bringing a blade into abutment against the electrophotographic photoreceptor, wherein the toner includes a toner base containing a coloring agent and a binder resin, and has a surface layer containing an organosilicon polymer having a specific sticking ratio to a toner base, and wherein the electrophotographic photoreceptor includes a supporting member and a surface layer, and the surface layer has a specific universal hardness value and a specific elastic deformation ratio (We).
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: August 18, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Tsutomu Nishida, Yuka Ishiduka, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa, Satoshi Otsuji, Kentaro Yamawaki, Daisuke Miura
  • Patent number: 10601344
    Abstract: The present invention relates to a triboelectric energy harvesting device and a method for manufacturing the same. The triboelectric energy harvesting device according to an embodiment of the present invention includes a first frictional layer provided with a first surface having first electron affinity, and a second frictional layer facing the first surface and having second electron affinity, wherein at least one of the first and second frictional layers is formed of an elastic material and is provided in an elastic structure.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 24, 2020
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNVERSITY
    Inventors: Jong-Souk Yeo, Jun-Young Lee
  • Patent number: 10539888
    Abstract: An electrophotographic photosensitive member includes an electroconductive support member and a photosensitive layer. The uppermost layer of the electrophotographic photosensitive member defines a surface layer, and the surface layer contains polytetrafluoroethylene particles, a charge transporting material, and polyvinyl acetal. The proportion of the polyvinyl acetal content to the polytetrafluoroethylene particles content in the surface layer is in the range of 0.1% by mass to 15.0% by mass, and the charge transporting material content in the surface layer is 35% by mass or more relative to the total mass of the surface layer.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: January 21, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenichi Kaku, Kaname Watariguchi, Kazuko Araki, Tomohito Ishida, Michiyo Sekiya
  • Patent number: 10037181
    Abstract: According to one embodiment, an image forming apparatus includes an image forming job created and transmitted by an job creation unit including an image to be printed, a receiving unit that receives a request of print setting to the image, a display unit that displays a setting screen having a setting unit to designate a setting of rewritable print or permanent print per page in response to receive the request of print setting, a memory unit that stores the setting of rewritable print or permanent print per page set by operating the setting screen, in addition to the image as the image forming job, and an image forming unit that receives the image forming job from the job creation unit and forms images on a sheet based on the setting in the image forming job.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 31, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Makoto Hibino, Kengo Yaoi
  • Patent number: 9932452
    Abstract: A release film is provided for supporting an ultrathin ceramic green sheet having a thickness of 0.5 to 1.0 ?m, and the release film due to containing modified organic particles and an antistatic agent has a slippery releasing surface with a low friction coefficient and hence excellent coatability and releasing properties; resulted in that when the release film is rolled up, the rolled surfaces do not adhere to each other, and when the ultrathin ceramic green sheet is peeled off from the release film, the ultrathin ceramic green sheet due to a relatively small electrostatic force being generated is without breaking; so that the release film contributes to increasing the yield of ultrathin ceramic green sheet.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: April 3, 2018
    Assignee: NAN YA PLASTICS CORPORATION
    Inventors: Te-Chao Liao, Sen-Huang Hsu, Chao-Quan Wu
  • Patent number: 9738749
    Abstract: The present invention relates to multi-component compositions including an isocyanate component and an amine component, wherein the isocyanate component includes a prepolymer, obtainable from toluene isocyanate and a polytetramethylene polyol, and the amine component includes a dialkylthio aryl diamine and possibly a polytetramethylene oxide polyamine. Corresponding compositions can be advantageously used as flowable or spreadable resin systems for producing surface protection coatings in casting house applications and are characterized by a significantly improved resistance to abrasion in comparison with conventional casting resin systems based on hexamethylene diisocyanate and dimethyl thiotoluene diamine.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: August 22, 2017
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Wolfgang Dürnay, Florian Gneiting
  • Patent number: 9358778
    Abstract: Hard imaging methods and devices are described. In at least some examples, a method includes ejecting a plurality of droplets of a liquid marking agent corresponding to the image to be formed, wherein the droplets of the liquid marking agent individually comprise a plurality of ink particles. The droplets are received upon a transfer member, and after the receiving, at least the ink particles are transferred from the transfer member to media to form a hard version of the image using the media.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: June 7, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Omer Gila, Ronald Albert Askeland, Yossi Rosen
  • Patent number: 9346287
    Abstract: An imaging method includes coating a transfer member with an adhesion promoter in a liquid state, changing the adhesion promoter on the transfer member from the liquid state to at least one of a solid state and a get state, depositing a liquid marking agent on the solidified adhesion promoter corresponding to an image, changing a state of the adhesion promoter from the solid state to the flowable state, and transferring the liquid marking agent and the adhesion promoter in the flowable state from the transfer member to a substrate to form a hard version of the image thereon.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 24, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Henryk Birecki, Napoleon Leoni, Omer Gila, Thomas C Anthony
  • Publication number: 20150030974
    Abstract: Described herein is a photoreceptor having a substrate, a charge generating layer, a charge transport layer comprising N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine having a purity of from about 95 percent to about 100 percent, and a protective overcoat layer. The N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine has been treated by a purification process two or more times.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gregory M. McGuire, Jennifer A. Coggan, Alan E.J. Toth, Nan-Xing Hu, Yu Liu
  • Patent number: 8900782
    Abstract: An electrophotographic photoreceptor includes a substrate; an undercoat layer provided on the substrate and containing a tin-zinc complex oxide powder having a volume resistivity of about 2×109 ?·cm or less; and a photosensitive layer provided on the undercoat layer.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: December 2, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazunori Anazawa, Tomoko Miyahara, Kaoru Torikoshi
  • 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
  • Patent number: 8871416
    Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive includes particles having oil-treated surfaces and composite particles containing silica and titania, and the toner has a content ratio of titania with respect to silica on the surface of the toner, as measured by X-ray photoelectron spectroscopy, of equal to or less than 5 atomic %.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: October 28, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yutaka Saito, Hiroki Ohmori, Hirokazu Hamano
  • Publication number: 20140170550
    Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.
    Type: Application
    Filed: May 8, 2013
    Publication date: June 19, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuo KADOKURA, Kazufumi TOMITA, Hideaki YOSHIKAWA
  • Patent number: 8741528
    Abstract: An electrostatic charge image developing toner including toner particles containing a colorant, a binder resin and a release agent; and an external additive, in which the external additive contains inorganic particles having hydrocarbon oil that contains a saturated hydrocarbon having a ring structure on the surfaces thereof.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: June 3, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shintaro Anno, Yoshifumi Iida, Eiji Kawakami, Masahiro Takagi
  • Patent number: 8735042
    Abstract: An electrostatic latent image developing toner includes: a release agent; a pigment; and a binder resin. The content of the pigment is from about 10% by weight to about 50% by weight, the glass transition temperature (Tg) of the toner is in the range of from about ?60° C. to about 20° C., and the Young's modulus at 20° C. is in the range of from about 1×100 MPa to about 1×103 MPa.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: May 27, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Kamiwaki, Kiyohiro Yamanaka, Yusuke Ikeda, Koji Sasaki
  • Patent number: 8728698
    Abstract: The present invention is to provide a carrier and a developer, which have fewer occurrences of carrier adhesion and background smear, excellent granularity and longer durability. The carrier comprises the core material particles having magnetism and resin coating layer covering the core material particles, and wherein the weight average particle diameters is in the range of 22 m to 32 m, the proportion of the weight average particle diameters relative to the number average particle diameter is in the range of 1.00 to 1.20, the content of particles having a diameter of 20 m or smaller is 7% by mass, the content of carrier particles having a diameter of 36 m or smaller is in the range of 90% by mass to 100% by mass, and the proportion of the particle density of the core material particles is in the range of 85% to 100% of the true density of the core material particles.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: May 20, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Kimitoshi Yamaguchi, Naoki Imahashi
  • Patent number: 8652740
    Abstract: Printing methods are provided. In one aspect, at least one first toner image is formed and transferred onto a receiver to form a composite toner image on a receiver having a first polarity. A second net development difference of potential of the first polarity is created between a second development station, a bias member and the first toner at each location of the receiver, to cause a second toner of the first polarity to deposit at individual locations on the receiver in amounts that according to the second net development difference of potential at the individual locations such that total amount of first toner and any second toner deposited at each location on the receiver is within a range that is less than a range of first toner amounts on the receiver.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: February 18, 2014
    Assignee: Eastman Kodak Company
    Inventor: William Y. Fowlkes
  • Patent number: 8652741
    Abstract: Methods for printing are provided. In one aspect a primary imaging member having a pattern of engine pixel locations with image modulated differences of potential and with first toner having a first toner difference of potential is moved to a second development station. A second development difference of potential of the first polarity at the second development station forms a second net development difference of the second development difference of potential less any image modulated difference of potential at the individual engine pixel location and less any difference of potential relative to ground of any first toner at the individual engine pixel location. The second development difference of potential is greater than the first development difference of potential so that second toner that is different from the first toner, is developed onto the first toner using the second net development difference of potential.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: February 18, 2014
    Assignee: Eastman Kodak Company
    Inventor: William Y. Fowlkes
  • Publication number: 20140004457
    Abstract: A polymerization toner having superior chargeability and storage stability is provided. The polymerization toner includes a binder resin and a colorant, wherein the binder resin has a dielectric constant ranging from 2.8 to 3.7.
    Type: Application
    Filed: December 21, 2011
    Publication date: January 2, 2014
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Jae Bum Park, Young Jae Kwon, Dong Woo Kim, Dae Woong Choi
  • Patent number: 8586162
    Abstract: The present invention is an electroconductive endless belt used in an image forming apparatus in which a decrease with use in the gloss value caused by frictions and the like with papers and cleaning blade is suppressed. In the electroconductive endless belt, the base resin of the electroconductive endless belt comprises a polyalkylene terephthalate resin in combination with a naphthalene ring-containing thermoplastic resin and/or a naphthalene ring-containing thermoplastic elastomer having a melting point higher than that of the polyalkylene terephthalate resin, and the mass ratio of the polyalkylene terephthalate resin to the naphthalene ring-containing thermoplastic resin and/or the naphthalene ring-containing thermoplastic elastomer in the base resin is in the range of 90/10 to 50/50.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: November 19, 2013
    Assignee: Bridgestone Corporation
    Inventors: Takahiro Suzuki, Kunio Machida
  • Publication number: 20130252157
    Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent and an external additive, in which the external additive contains inorganic particles which include saturated hydrocarbons having from 9 to 35 carbon atoms on the surfaces thereof.
    Type: Application
    Filed: August 3, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eiji KAWAKAMI, Yoshifumi IIDA, Shintaro ANNO, Masahiro TAKAGI
  • Publication number: 20130252168
    Abstract: A carrier for developing an electrostatic charge image includes a core containing a magnetic material and a coating layer, in which the coating layer includes porous carbon having a volume average particle size of from 0.5 ?m to 2 ?m and a BET specific surface area of from 1 m2/g to 5 m2/g, and a resin.
    Type: Application
    Filed: July 20, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Yasushige NAKAMURA
  • Publication number: 20130252159
    Abstract: An electrostatic charge image developing toner includes toner particles that contain a colorant, a binder resin and a release agent, and an external additive, in which the external additive contains inorganic particles including an aliphatic alcohol having 5 or more carbon atoms and a melting point of 20° C. or lower on the surfaces thereof.
    Type: Application
    Filed: July 25, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eiji KAWAKAMI, Shintaro ANNO, Hirokazu HAMANO, Michio TAKE
  • Publication number: 20130252164
    Abstract: The toner for developing an electrostatic charge image includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive contains inorganic particles having fluorine atom-containing oil on the hydrophobization-treated surfaces.
    Type: Application
    Filed: August 2, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi IIDA, Eiji KAWAKAMI, Shintaro ANNO, Masahiro TAKAGI
  • Publication number: 20130252165
    Abstract: An electrostatic charge image developing toner including toner particles containing a colorant, a binder resin and a release agent; and an external additive, in which the external additive contains inorganic particles having hydrocarbon oil that contains a saturated hydrocarbon having a ring structure on the surfaces thereof.
    Type: Application
    Filed: August 3, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shintaro ANNO, Yoshifumi IIDA, Eiji KAWAKAMI, Masahiro TAKAGI
  • Publication number: 20130252161
    Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent; and an external additive, wherein the external additive contains inorganic particles which include a compound represented by Formula (1) below on the surfaces thereof: wherein in Formula (1), R1 and R8 each independently represents an alkyl group, R2 to R7 each independently represents an alkyl group or a substituted or unsubstituted phenyl group, and at least three groups of R2 to R7 each independently represents a substituted or unsubstituted phenyl group.
    Type: Application
    Filed: July 27, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Eiji KAWAKAMI, Shintaro ANNO, Hirokazu HAMANO
  • Publication number: 20130244161
    Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive includes particles having oil-treated surfaces and composite particles containing silica and titania, and the toner has a content ratio of titania with respect to silica on the surface of the toner, as measured by X-ray photoelectron spectroscopy, of equal to or less than 5 atomic %.
    Type: Application
    Filed: July 31, 2012
    Publication date: September 19, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yutaka SAITO, Hiroki OHMORI, Hirokazu HAMANO
  • Publication number: 20130244162
    Abstract: A toner, including: a binder resin; and a colorant, wherein the binder resin contains: a crystalline polyester resin (A); a non-crystalline resin (B); and a composite resin (C), where the composite resin (C) contains a condensation polymerization resin unit and an addition polymerization resin unit, wherein the toner contains chloroform insoluble matter in an amount of 1% by mass to 30% by mass, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000 and a half width of 15,000 or less, where the molecular weight distribution is obtained through gel permeation chromatography (GPC) of tetrahydrofuran soluble matter of the toner, and wherein the toner has an endothermic peak in a range of 90° C. to 130° C. in measurement through differential scanning calorimetry (DSC).
    Type: Application
    Filed: March 14, 2013
    Publication date: September 19, 2013
    Inventors: Saori Yamada, Hisashi Nakajima, Masashi Nagayama, Shinya Hanatani, Mariko Takii, Yoshitaka Sekiguchi
  • Publication number: 20130224640
    Abstract: A transparent toner for developing an electrostatic latent image includes toner particles containing a binder resin; and an external additive containing cerium oxide, in which the content of cerium in all toner particles is in the range of 0.05% by weight to 0.20% by weight, and the cerium oxide contains neodymium and the content of neodymium in all toner particles is in the range of 0.001% by weight to 0.015% by weight.
    Type: Application
    Filed: July 3, 2012
    Publication date: August 29, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Atsushi SUGAWARA, Masanobu NINOMIYA, Tetsuya TAGUCHI, Yukiaki NAKAMURA, Koji SASAKI
  • Publication number: 20130209932
    Abstract: An electrostatic charge image developing carrier has magnetic particles and a coating resin layer that coats surfaces of the magnetic particles and contains a hindered amine compound.
    Type: Application
    Filed: August 10, 2012
    Publication date: August 15, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Toshiaki HASEGAWA, Mona TASAKI, Fusako KIYONO
  • Publication number: 20130189615
    Abstract: The present application discloses an image forming apparatus which uses at least two types of liquid developer to form a plurality of images that are superimposed on a sheet to form an image. The image forming apparatus includes a transfer mechanism configured to transfer the image to the sheet, an image forming mechanism configured to make the transfer mechanism carry the image, and a rubbing mechanism configured to rub the image on the sheet. The at least two types of liquid developer have different fixing properties from each other. The transfer mechanism includes a carrying surface configured to carry the image from the image forming mechanism. One of the plurality of images between the carrying surface and another of the plurality of images has higher fixing properties than the liquid developer used for forming the other image among the plurality of images.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 25, 2013
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: KYOCERA Document Solutions Inc.
  • Publication number: 20130183618
    Abstract: Provided is an electrostatic charge image developing toner, each toner particle including a core portion, a first shell layer, and a second shell layer, wherein the core portion contains a first polyester resin, a colorant, and a release agent, the first shell layer contains a second polyester resin and covers the core portion, the second shell layer contains a polymer of an aromatic vinyl monomer and a third polyester resin having an ethylenic unsaturated double bond that is polymerizable with the aromatic vinyl monomer, and covers the first shell layer, and a total amount of the first shell layer and the second shell layer is within a range of from 16% by weight to 40% by weight of the toner particle.
    Type: Application
    Filed: July 3, 2012
    Publication date: July 18, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO, Tomohiro SHINYA
  • Publication number: 20130143152
    Abstract: A carrier for electrostatic image development, and a developer, an image formation method and an image formation apparatus using the carrier. The carrier is carrier particles. When the carrier particles each have a coating layer on a magnetic particle, the carrier has a total energy amount of 1500 to 3000 mJ. When the carrier particles each have a coating layer on a magnetic powder-dispersed particle, the carrier has a total energy amount of 1000 to 1500 mJ. The total energy amount is measured with a powder rheometer at a tip end speed of a rotor of 100 mm/s and a helix angle of the rotor of ?5°. The total energy amount is a value of a portion of the carrier in a measurement container which portion is contained in the region between the packed surface of the carrier and a surface disposed under the packed surface by 70 mm.
    Type: Application
    Filed: December 31, 2012
    Publication date: June 6, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventor: FUJI XEROX CO., LTD.
  • Publication number: 20130137030
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin and pigment particles and an external additive containing fluorine resin particles, wherein the electrostatic charge image developing toner satisfies the following expression: 2?A/B?100, wherein A represents reflectance at an acceptance angle of +30° which is measured when a solid image is formed using the electrostatic charge image developing toner and the solid image is irradiated with incident light at an incidence angle of ?45° by the use of a variable-angle photometer, and B represents reflectance at an acceptance angle of ?30° which is measured when the solid image is irradiated with incident light at an incidence angle of ?45° by the use of the variable-angle photometer.
    Type: Application
    Filed: May 11, 2012
    Publication date: May 30, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shuji SATO, Atsushi SUGITATE, Masaru TAKAHASHI, Shotaro TAKAHASHI
  • Publication number: 20130122410
    Abstract: An electrophotographic photoconductor including a conductive support, a charge generating layer, a hole transporting layer, and a hole transporting-protective layer, these layers being laminated in this order on the conductive support, wherein the hole transporting-protective layer contains a three-dimensionally crosslinked product which is obtained through chain polymerization of at least a radical polymerizable hole-transporting compound by irradiating the radical polymerizable hole-transporting compound with an active energy beam, and wherein the hole transporting-protective layer contains an oxazole compound represented by General Formula (1) or (2) below:
    Type: Application
    Filed: July 29, 2011
    Publication date: May 16, 2013
    Inventors: Kazukiyo Nagai, Tetsuro Suzuki, Hongguo Li
  • Patent number: 8431313
    Abstract: Printing methods are provided. In one aspect, at least one first toner image is formed and transferred onto a receiver to form a composite toner image on a receiver having a first polarity. A second net development difference of potential of the first polarity is created between a second development station, a bias member and the first toner at each location of the receiver, to cause a second toner of the first polarity to deposit at individual locations on the receiver in amounts that increase monotonically with an increase in the net second development difference of potential at the individual locations such that total amount of first toner and any second toner deposited at each location on the receiver is within a range that is less than a range of first toner amounts on the receiver.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: April 30, 2013
    Assignee: Eastman Kodak Company
    Inventor: William Y. Fowlkes
  • Publication number: 20130095423
    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: Application
    Filed: October 15, 2012
    Publication date: April 18, 2013
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Kyocera Document Solutions Inc.
  • Patent number: 8414991
    Abstract: A conductive endless belt is composed of elastomer polyester with a crystalline melting point at 210° C. or more, or mainly composed of the elastomer polyester, and a thermoplastic polyester-based resin at 49 wt % or less, added a polymer ion conductive agent and a carbon black. The conductive endless belt. satisfies elastic modulus, creep resistance, bending durability, etc. and has decreased volume resistance variation and environment dependency while having superior durability, glossiness and setting performance that satisfying desired performance, without causing problems such as offset image.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: April 9, 2013
    Assignee: Bridgestone Corporation
    Inventors: Takahiro Suzuki, Toshiyuki Osaki, Kunio Machida, Yoichi Nishimuro
  • Publication number: 20130040236
    Abstract: A carrier for a two-component developer includes magnetic particles, and a resin coating layer that covers the magnetic particles. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm.
    Type: Application
    Filed: February 22, 2012
    Publication date: February 14, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Takeshi SHOJI, Toshiaki HASEGAWA
  • Publication number: 20130040233
    Abstract: An electrophotographic photoreceptor includes a substrate; an undercoat layer provided on the substrate and containing a tin-zinc complex oxide powder having a volume resistivity of about 2×109 ?·cm or less; and a photosensitive layer provided on the undercoat layer.
    Type: Application
    Filed: February 29, 2012
    Publication date: February 14, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazunori ANAZAWA, Tomoko MIYAHARA, Kaoru TORIKOSHI
  • Publication number: 20130022902
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate; a charge generation layer located overlying the electroconductive substrate; a charge transport layer located overlying the charge generation layer; and an outermost layer located overlying the charge transport layer. The charge transport layer includes a positive hole transport material having the following formula (1): wherein each of R1 to R26 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxyl group having 1 to 4 carbon atoms, and a compound having the following formula (2): wherein each of R27 and R28 independently represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.
    Type: Application
    Filed: July 13, 2012
    Publication date: January 24, 2013
    Inventors: Keisuke Shimoyama, Hideo Nakamori, Noboru Toriu, Mitsuaki Hirose, Tomoharu Asano
  • Publication number: 20120301819
    Abstract: Provided is a toner having excellent blocking resistance and flowability. The toner comprises a binder resin, a releasing agent, a colorant and an external additive, wherein the toner particles satisfy expression (1): 2.0?RD/TD?2.5 ??(1), where RD is the real density of the toner particles and TD is the tap density of the toner particles.
    Type: Application
    Filed: February 1, 2011
    Publication date: November 29, 2012
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Dae Woong Choi, Jae Bum Park, Young Jae Kwon
  • Patent number: 8310509
    Abstract: Various embodiments provide systems and methods for direct digital marking, wherein an electrostatic latent image or a surface charge contrast can be formed and developed at a development nip formed by a nano-enabled imaging member and a negatively-biased development subsystem.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: November 13, 2012
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Yuanjia Zhang, Mandakini Kanungo
  • Patent number: 8305405
    Abstract: Various embodiments provide systems and methods for digital offset/flexo printing by selectively addressing one or more hole-injecting pixels of a nano-enabled imaging member to form a latent image thereon, wherein the latent image can be electrostatically developed with an ink and then transferred from the nano-enabled imaging member onto a print media.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 6, 2012
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Mandakini Kanungo
  • Publication number: 20120251934
    Abstract: An electrophotographic photoconductor including: an electrically conductive substrate; and at least a photoconductive layer thereon, wherein the photoconductive layer contains a diazapentadiene derivative represented by general formula (1): where “X” represents general formula (a), (b) or (c); “R1” and “R2” each represent substituted or unsubstituted alkyl group or aromatic hydrocarbon group, and may be the same or different; “R1” and “R2” may be joined together via “Y” to form a ring; “Y” represents single bond, oxygen atom, —CH2CH2—, or —CH?CH—, where “R3” represents substituted or unsubstituted alkyl group, aromatic hydrocarbon group, alkoxy group, alkoxycarbonyl group, or halogen group; “R4” represents substituted or unsubstituted alkyl or aromatic hydrocarbon group; “n” represents integer ranging from 0 to 4; and when “n” is integer of 2 to 4, “R3” may be the same or different.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Inventors: Ryota ARAI, Tomoyuki SHIMADA, Minoru UMEDA
  • Publication number: 20120244467
    Abstract: Toner particles having excellent cleaning properties and glossing properties. The toner particles include a binder resin, a releasing agent, and a colorant, wherein toner particles satisfy the following conditions. 50° C.?T1/2?Tg?100° C.??(1) 50° C.?Tg60° C.
    Type: Application
    Filed: December 16, 2010
    Publication date: September 27, 2012
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Jae Bum Park, Young Jae Kwon, Dae Woong Choi
  • Patent number: 8206879
    Abstract: To provide an image forming method for obtaining excellent image quality under high humidity. The image forming method including charging a surface of a latent electrostatic image bearing member, exposing the charged surface of the latent electrostatic image bearing member so as to form a latent electrostatic image, developing the latent electrostatic image using a developer so as to form a toner image, and transferring the toner image from the latent electrostatic image bearing member to a transfer medium, wherein in the developing step, a toner is used that has an interparticle adhesion force of 500 nN to 1,200 nN when pressed at 500 nN and a volume average particle diameter of 4 ?m to 8 ?m, and in the transferring step, the transfer pressure applied to the transfer medium is 20 N/m to 60 N/m, and wherein a tandem image forming apparatus is used in the image forming method.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: June 26, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Izutani, Minoru Nakamura
  • Patent number: 8163456
    Abstract: An image forming method and image forming apparatus based on the application thereof wherein comet-like deposits do not appear on the surface of the photoreceptor even after prolonged use of small-diameter toner, and there is no dropout or damage on the photoreceptor surface in the image forming process using an intermediate transfer member. This image forming method contains a process wherein the toner developed on an electrophotographic photoreceptor is transferred onto an intermediate transfer member, and the toner contains at least a metallic oxide and metallic soap added as external additive agents, and the protective layer contains a resin component obtained by reaction of at least a curable compound, and alumina particles.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: April 24, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hirofumi Hayata, Masahiko Kurachi, Toshiyuki Fujita