Identified Toner Shape (e.g., Recited Shape Parameter, Etc.) Patents (Class 430/110.3)
  • Patent number: 10585367
    Abstract: Provided is an electrostatic charge image developing toner including: toner particles; and strontium titanate particles A and strontium titanate particles B having different average primary particle diameters from each other. The strontium titanate particles B have an average primary particle diameter Db of 10 nm to 100 nm. An average primary particle diameter Da of the strontium titanate particles A and the average primary particle diameter Db of the strontium titanate particles B satisfy a relationship of 10?Da/Db?100.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: March 10, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuka Yamagishi, Moegi Iguchi, Yutaka Saito, Mona Tasaki, Soutaro Kakehi, Sakon Takahashi
  • Patent number: 10401749
    Abstract: Provided are a toner, and a developing agent container, an image forming unit and an image forming apparatus including the toner. The toner includes a toner particle. The toner particle includes at least one brilliant pigment particle, binder resin containing the brilliant pigment particle, and a parting agent dispersed in the binder resin, wherein a hydrophobicity degree of the brilliant pigment particle is in a range from 61.2 to 92.7.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: September 3, 2019
    Assignee: Oki Data Corporation
    Inventor: Hideharu Kuwabara
  • Patent number: 10338514
    Abstract: An image forming apparatus (1) includes an image bearing member (50), a charging section (51), a developing section (52), and a cleaning member (81). The image bearing member (50) contains filler particles (87). The charging section (51) is either in contact with or positioned close to the image bearing member (50) and is configured to electrically charge the image bearing member (50) by generating a proximity discharge between the charging section (51) and the image bearing member (50). The developing section (52) supplies toner to the circumferential surface of the charged image bearing member (50). The cleaning member (81) has a degree of hardness equal to or higher than 65° and a degree of impact resilience equal to or lower than 30%. The cleaning member (81) is brought into pressure contact with the circumferential surface of the image bearing member (50) being rotated, by applying linear pressure equal to or higher than 15 gf/cm.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: July 2, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshitaka Imanaka, Hiroaki Watanabe, Masahito Ishino
  • Patent number: 10078279
    Abstract: A toner comprising a toner particle that contains a binder resin and a wax, wherein in a cross sectional image of the toner observed with a transmission electron microscope, the toner satisfies the following formulas (1) and (2) 18.0%?As?1.5%??(1) 10.0?Ac/As?2.0??(2) where As represents the proportion for the area taken up by the wax present in the surface layer region having distance 1.0 ?m in a radial direction inward from the surface of the toner, and Ac represents the proportion for the area taken up by the wax present in the inner region positioned further inside than the surface layer region.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: September 18, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiro Nakagawa, Naoya Isono, Harumi Takada, Reo Tagawa
  • Patent number: 9971261
    Abstract: An electrostatic-image developing toner including at least a binder resin; a colorant; and a release agent, wherein an average circularity of particles having a particle diameter in a range of 0.79 times or more but less than 1.15 times as large as a most frequent diameter in a number particle size distribution of the toner is within a range of 1.010 times or more but less than 1.020 times as high as an average circularity of particles having a particle diameter of 1.15 times or more as large as the most frequent diameter.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: May 15, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Takahashi, Yoshihiro Moriya, Ryota Inoue, Masahiko Ishikawa, Tatsuki Yamaguchi, Satoshi Kojima
  • Patent number: 9896549
    Abstract: Provided according to some embodiments of the invention are hydrophobic and/or oleophobic silica-based coatings. In some embodiments of the invention, coatings may include a silica matrix having hydrophobic and/or oleophobic functionalized pores encapsulated therein. Also provided according to some embodiments of the invention are methods of forming a coating according to an embodiment described herein. In some embodiments, methods include (a) combining at least one silane and/or alkoxysilane and at least one fluoroalkylsilane and/or fluoroalkoxysilane with an alcohol, water and an acid to form a sol mixture; (b) adding a surfactant to the sol mixture to form a surfactant sol mixture; (c) depositing the surfactant sol mixture onto a substrate; and (d) curing the surfactant sol mixture to form a silica coating. Methods of preventing adhesion are also provided herein.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: February 20, 2018
    Inventors: Aaron Kessman, Darran Cairns
  • Patent number: 9745436
    Abstract: The present invention provides a sensor having an improved sensitivity and precision, which is lighter and more flexible than conventional sensors, and a method of making the sensor. The present invention relates to a sensor comprising a resin foam containing a magnetic filler, and a magnetic sensor that detects a magnetic change caused by a deformation of the resin foam, wherein the resin foam is a polyurethane resin foam that comprises a polyisocyanate component, an active hydrogen component, a catalyst and a foam stabilizer, and wherein the resin foam has a hardness change (H1-H60) of 0 to 10 between a JIS-C hardness (H1) in one second after contact with a pressure surface of a hardness tester and a JIS-C hardness (H60) in 60 seconds after the contact.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: August 29, 2017
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventors: Junichi Shigeto, Takeshi Fukuda, Hiroyuki Anzai, Zhiwei Luo
  • Patent number: 9618862
    Abstract: A toner is provided. The toner includes a binder resin and a release agent. The release agent has an average aspect ratio of 31 or more, when the average aspect ratio is determined from cross-sectional images of the toner observed with a transmission electron microscope (TEM).
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: April 11, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Moriya, Masahiko Ishikawa, Ryota Inoue, Satoshi Takahashi, Tatsuki Yamaguchi
  • Patent number: 9594323
    Abstract: A toner having toner particles, each of which contains a binder resin, a wax and inorganic fine particles, wherein the inorganic fine particles are fixed at the surface of the toner particles as a result of a surface treatment by hot air, and the degree of uneven distribution of wax in the toner is controlled in a depth direction of the toner, from the toner surface towards a toner central portion.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: March 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Fujikawa, Kunihiko Nakamura, Nozomu Komatsu, Kosuke Fukudome, Yoshiaki Shiotari, Takayuki Itakura
  • Patent number: 9576342
    Abstract: An image processing apparatus includes an acquiring unit, an identifying unit, and a correcting unit. The acquiring unit acquires input data including shape data on a concave-convex area having a convex part and a concave part and image data of an image formed on the concave-convex area. The identifying unit identifies an uneven area which is within a bottom surface of the concave part and is continuous with a wall surface connecting the bottom surface and a convex surface of the convex part. The correcting unit corrects the image data so that the brightness of a first image area in the uneven area stacked with multiple dots and the brightness of a second image area continuous with the first image area become about the same.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: February 21, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Norimasa Sohgawa, Masanori Hirano, Shinichi Hatanaka
  • Patent number: 9541853
    Abstract: A magnetic carrier includes resin-filled magnetic core particles including porous magnetic particles whose pores are filled with a resin, and resin coating layers on the surfaces of the resin-filled magnetic core particles. The porous magnetic particles have specific electrical properties.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: January 10, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hironori Minagawa, Wakashi Iida, Nobuyoshi Sugahara, Minoru Yoshifuku, Yuto Onozaki
  • Patent number: 9535350
    Abstract: Toner of one aspect of the present invention has a weight average molecular weight Mw of 30,000?Mw?95,263 as determined from a molecular weight distribution based on GPC, includes a THF-insoluble gel component at a weight proportion of less than 5%, and includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: January 3, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Keiichi Kikawa, Tadayuki Sawai, Yoritaka Tsubaki, Keigo Mitamura, Yui Kawano, Shintaro Fukuoka
  • Patent number: 9477168
    Abstract: A process for preparing a polymer-encapsulated carbon black material is described. The process comprises: (a) preparing a mixture of an ionic monomer, a stabilizer and carbon black in water; (b) adding an initiator; (c) adjusting the temperature to a temperature above room temperature; and (d) adding at least one other monomer and a charge control agent to obtain the material. The process is performed under continuous stirring. The polymer-encapsulated carbon black material is surfactant-free and is used in the production of toners.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: October 25, 2016
    Assignee: King Abdulaziz City for Science and Technology (KACST)
    Inventors: Ahmed Ali Basfar, Jatindranath Maiti
  • Patent number: 9394413
    Abstract: A resin particle having: a resin mother particle; and silica particles external added onto the surface of the resin mother particle, wherein a primary particles of the silica particles which have a volume average particle diameter of from 100 nm to 500 nm, a particle size distribution index of from 1.40 to 1.80 and an average circularity of from 0.5 to 0.85 has a regression line expressed by the following expression (1) with respect to the circularity and the volume average particle diameter (nm): Circularity=?×(Volume average particle diameter)/1000+???(1) wherein ? is from ?2.5 to ?0.9, and ? is from 0.8 to 1.2.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: July 19, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hideaki Yoshikawa, Yuka Zenitani, Hiroyoshi Okuno, Shunsuke Nozaki, Shinichiro Kawashima, Sakae Takeuchi, Yasuo Kadokura
  • Patent number: 9348244
    Abstract: An electrostatic charge image developing toner includes toner particles, elastomer particles which are externally added to the toner particles and contain a first oil, and inorganic particles which are externally added to the toner particles and contain a second oil having a viscosity higher than a viscosity of the first oil at 25° C.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: May 24, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Fusako Kiyono, Shintaro Anno, Hiroki Omori, Emi Matsushita
  • Patent number: 9298115
    Abstract: In an electrophotographic photosensitive member including a charge-generating layer, the charge-generating layer has a matrix-domain structure; in the matrix-domain structure, the domain contains a charge-generating substance, and the matrix contains a binder resin and a fluoranthene compound.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: March 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junpei Kuno, Takeshi Murakami, Tsutomu Nishida, Masataka Kawahara, Kaname Watariguchi
  • Patent number: 9217942
    Abstract: Disclosed is a toner for electrostatic image development that has excellent low-temperature fixability and also has sufficient heat-resistant storage stability. The toner for electrostatic image development includes toner particles containing an amorphous resin including amorphous resins A and B and a crystalline polyester resin. The toner particles have a domain-matrix structure in which a domain phase including fine core particles of the crystalline polyester resin is dispersed in a matrix phase formed of the amorphous resin A composed of a vinyl-based polymer. The surface of the fine core particles of the crystalline polyester resin is coated with the amorphous resin B composed of a vinyl-based polymer.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: December 22, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Aya Shirai, Hiroshi Nagasawa, Kaori Matsushima, Masahiro Matsuoka, Takaki Kawamura, Taiki Amemiya
  • Patent number: 9069269
    Abstract: There is disclosed a toner for electrostatic latent image development which includes at least a colorant, a charge control agent, and a release agent in a binder resin and is produced using a pulverizing process. An average circularity of the toner is 0.960 or more and 0.980 or less with respect to toner particles having a primary particle diameter of 3 ?m or more and 10 ?m or less. A numerical proportion of toner particles, having a concave portion of which outer diameter is 200 nm or more and being observed by a predetermined condition, is 10% by number or less.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: June 30, 2015
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Takanori Tanaka, Masashi Tamagaki
  • Patent number: 9058924
    Abstract: A magnetic carrier having a resin-containing ferrite particles each containing a porous ferrite core and a resin in pores of the porous ferrite core, wherein the porous ferrite core has a particular pore diameter corresponding to the maximum logarithmic differential pore volume in a pore diameter range from at least 0.10 ?m to not more than 3.00 ?m, the resistivity of the porous ferrite core is in a particular range, and the porous ferrite core contains an oxide of Mg in a particular amount and contains a particular amount of a oxide of at least one metal selected from the group consisting of Mn, Sr, and Ca.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: June 16, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Nozomu Komatsu, Kentaro Kamae, Koh Ishigami, Yoshinobu Baba
  • Patent number: 9034551
    Abstract: Provided is a two-component developer containing: a magnetic carrier obtained by coating a magnetic core with a resin; and toner, in which: the magnetic core contains at least a ferrite component and at least one kind of an oxide selected from the group consisting of SiO2 and Al2O3; the content of the oxide is 4.0 mass % or more and 40.0 mass % or less with respect to the magnetic core; the magnetic core has a specific resistance of 5.0×104 ?·cm or more and 5.0×108 ?·cm or less at the time of the application of 1,000 V/cm; the magnetic carrier has an intensity of magnetization in 79.6 kA/m of 40.0 Am2/kg or more and 65.0 Am2/kg or less, and a residual magnetization after the application of an external magnetic field of 79.6 kA/m of 3.0 Am2/kg or less; and the toner has a weight-average particle diameter (D4) of 3.0 ?m or more and 10.0 ?m or less and an average circularity of 0.940 or more and 0.990 or less.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: May 19, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoko Endo, Koh Ishigami, Naoki Okamoto, Yoshinobu Baba
  • Patent number: 9023570
    Abstract: A toner contains a binder resin, a colorant, and a releasing agent, wherein the toner contains toner particles, and wherein a proportion of the toner particles containing one or more voids having diameters D1 of larger than 0.0 ?m but 0.5 ?m or smaller is more than 5.0% to 60%, and a proportion of the toner particles containing one or more voids having diameters D2 of 1.0 ?m or larger is 10% or less.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Masana Shiba, Ryuta Chiba, Tsuneyasu Nagatomo
  • Patent number: 9017914
    Abstract: A toner for developing an electrostatic latent image includes toner particles. An average aspect ratio of the toner particles, having predetermined diameters of at least 3 ?m and less than 10 ?m, is in the range from about 0.820 to about 0.900, and the difference between the maximum value and minimum value among the average aspect ratios D3, D4, D5, D6, D7, D8, and D9 is up to 0.07. Dn represents an average aspect ratio of those toner particles having a diameter of at least n ?m and less than n+1 ?m.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: April 28, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takanori Tanaka
  • Publication number: 20150111140
    Abstract: A brilliant toner includes toner particles containing a brilliant pigment, and toner particles containing a yellow colorant without containing the brilliant pigment, wherein a ratio of the toner particles containing the yellow colorant without containing the brilliant pigment is 50% by number or greater.
    Type: Application
    Filed: May 1, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Daisuke NOGUCHI, Sakiko HIRAI, Masaru TAKAHASHI, Atsushi SUGITATE, Shuji SATO
  • 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
  • Patent number: 8962230
    Abstract: An electrostatic-image developing toner contains an amorphous polyester resin that has repeating units having a backbone derived from dehydroabietic acid in a main chain thereof and that has a weight average molecular weight of about 30,000 to about 80,000; and at least one of a crystalline polyester resin containing a dicarboxylic acid (C10) and a diol (C9) as polymerization components and a crystalline polyester resin containing a dicarboxylic acid (C9) and a diol (C10) as polymerization components.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shigeru Seitoku
  • Patent number: 8936895
    Abstract: To provide a toner, which contains: base particles each having a core-shell structure, where a core of the base particle contains crystalline polyester, non-crystalline polyester, a colorant, and a releasing agent, and a shell of the base particle contain a resin, wherein the toner has thermal hardness of 0.5 to 1.8, wherein the toner has a softening index of 80° C. to 95° C., and wherein the toner has thermal retentiveness of 30° C. to 50° C.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: January 20, 2015
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideki Sugiura
  • 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
  • Patent number: 8871413
    Abstract: 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: Grant
    Filed: September 19, 2008
    Date of Patent: October 28, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yuzo Kaneko, Masaya Oota, Shiho Sano, Masakazu Sugihara, Teruki Senokuchi, Shiro Yasutomi, Takeshi Owada, Yumi Hirabaru, Takuya Nishikiori, Teruyuki Mitsumori, Kozo Ishio, Hiroaki Takamura
  • 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
  • Patent number: 8859176
    Abstract: A toner contains a binder resin and a polyalkylene, wherein the following formula is satisfied: 2?A/B?100 where A represents a reflectance at a light-receiving angle of +30° and B represents a reflectance at a light-receiving angle of ?30°, A and B being measured when a solid fixed image formed by the toner is irradiated with incident light at an incident angle of ?45° using a goniophotometer.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: October 14, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Masaru Takahashi, Shotaro Takahashi, Shuji Sato
  • Patent number: 8852836
    Abstract: A toner including: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles is 20% by volume to 70% by volume, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60 ?C/m2 or more as measured by a blow-off method.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Seki, Yoshitaka Sekiguchi, Ryota Inoue, Kazuoki Fuwa
  • Patent number: 8846285
    Abstract: An object of the present invention is to provide a toner for developing electrostatic images, which prevents a decrease in toner charge amount in the environment of high temperature and high humidity, prevents occurrence of fog and has excellent flowability. Provided is a toner for developing electrostatic images, comprising an external additive and colored resin particles comprising a binder resin and a colorant, wherein the external additive is core-shell type complex fine particles in which resin fine particles are covered with at least one inorganic component selected from the group consisting of silica, alumina, titania and zirconia, and the volume ratio of the inorganic component of the core-shell type complex fine particles is 45 to 75% by volume when the total volume of the core-shell type complex fine particles is 100% by volume.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: September 30, 2014
    Assignee: Zeon Corporation
    Inventors: Takeru Chiba, Hisashi Kurokawa
  • Patent number: 8841056
    Abstract: A toner is provided which has toner particles and an inorganic fine powder; the toner particles being obtained by suspension polymerization using a specific polar resin. The toner is a toner in which; where, in displacement levels found in a micro-compression test in which a force is applied to a toner single particle at a loading rate of 9.8×10?6 N/sec to measure a displacement level (?m) at a point of time where the force has reached a maximum force of 4.90×10?4 N, the displacement level of the toner at a measurement temperature of 25° C. is represented by X(25) and the displacement level of the toner at a measurement temperature of 50° C. by X(50), and the number average particle diameter of the toner is represented by D (?m), the X(25), X(50) and D satisfies the relations: 0.10?X(25)/D?0.35??(1) 30?[X(50)?X(25)]/X(25)×100?150??(2).
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumi Yoshizaki, Shinya Yachi, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi
  • Patent number: 8765346
    Abstract: A magnetic single-component developer includes a spherical toner containing at least a magnetic powder and not containing a release agent in a binder resin, and a nonspherical toner containing at least a magnetic powder and a release agent in a binder resin. According to measurements taken from a scanning electron microscope image taken from 100 toner particles in the magnetic single-component developer, the spherical toner has a circularity of 0.980 or more, the nonspherical toner has a circularity of 0.960 or less, and a particle number ratio (A)/(B) of the number (A) of particles of the spherical toner to the number (B) of particles of the nonspherical toner is 3/7 or more and 5/5 or less.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: July 1, 2014
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Takanori Tanaka, Hiroki Uemura
  • Patent number: 8755698
    Abstract: System and methods for controlling toner properties in a two component development system through the toner shape factor. In particular, the present embodiments provide a method for controlling toner concentrations by tailoring the circularity value ranges of the toner particles to prevent dysfunctions and provide a more robust and optimized xerographic system.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 17, 2014
    Assignee: Xerox Corporation
    Inventors: Juan A. Morales-Tirado, Yolanda E. Maldonado, Blaise L. Luzolo, Michael L. Grande
  • Publication number: 20140162184
    Abstract: The present disclosure describes a color single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Publication number: 20140162181
    Abstract: The present disclosure describes a black single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Patent number: 8735035
    Abstract: An electrophotographic toner and a process for preparing the same. The electrophotographic toner includes a binder, a coloring agent, and a release agent. The binder includes two resins having different weight average molecular weights.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: May 27, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-yeon Lee, Jun-young Lee, Kyeong Pang, Tae-hoe Koo, Su-bum Park
  • Publication number: 20140134534
    Abstract: The present disclosure describes toner that is composed substantially of biodegradable and recycled materials.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Shigang Qiu, Santiago Faucher, Ke Zhou, John Abate, John Kallo
  • Patent number: 8722300
    Abstract: Disclosed are an electrophotographic toner and a method of preparing the same. The electrophotographic toner includes latex; a colorant; and a releasing agent. The absolute value of a differential value of complex viscosity with respect to temperature, ( ? ? ? ? T ? ) ? ? ? ( log 10 ? ? ) / ? T ? of the electrophotographic toner in a temperature range of 100° C.-160° C. is in a range of about 0.03 to about 0.06, and complex viscosity (?) of the electrophotographic toner at 140° C. is in a range of about 1.0×102 Pa·s to about 6.0×102 Pa·s.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: May 13, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-Ree Joo, Jae-Hyeuk Jeong, Kyeong Pang
  • Publication number: 20140127622
    Abstract: A plurality of flakes are provided that can be used in ink or paint wherein the flakes are of a size that requires magnification to see their shape, in the form of polygons, such as squares, triangle or rectangles. A breaking or grinding process is used to break a foil into these shaped flakes and frames or walls are provided within the foil sheet so as to delineate the shapes and these lines provided by frames or walls will facilitate breakage in a preferred manner such that the flakes break into selected shaped polygons. Remnants are typically present along flake edges due to the grinding and breakage process however with magnification, one can see the resultant regular polygonal shape. To clearly see the remnants one requires increased magnification and the remnant itself provides a type of signature. It can be seen as a taggent within a taggent.
    Type: Application
    Filed: January 9, 2014
    Publication date: May 8, 2014
    Inventors: Alberto ARGOITIA, Cornelis Jan DELST
  • Publication number: 20140120467
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 1, 2014
    Applicant: Xerox Corporation
    Inventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang
  • Patent number: 8685612
    Abstract: A continuous emulsion aggregation process for the production of particles is presented including a plurality of continuous stirred-tank reactors (CSTR). The plurality of continuous stirred-tank reactors includes a first reactor and a second reactor for facilitating an aggregation process; a third reactor for facilitating a shell addition process; a fourth reactor for facilitating a freeze process; a fifth reactor for facilitating a chelating process; a sixth reactor for facilitating a ramp-up process; and a seventh reactor for facilitating a coalescence process. The reactors are sequentially assembled in a series configuration, each of the reactors cooperating with an overhead stirrer. In other embodiments, a CSTR system of the present disclosure possesses five reactors sequentially assembled in a series configuration to form toner particles.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: April 1, 2014
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Kimberly D. Nosella, Lai Chi So
  • Patent number: 8673532
    Abstract: A method for producing dry toner particles that have similar particle size and shape characteristics as chemically produced toners. The method includes melt-mixing a toner resin with a colorant and, optionally, a wax, to form a toner; grinding the toner to form toner particles; classifying the toner particles into particles averaging 4 to 10 microns in size; blending the classified toner particles with additives in a high-speed blender; and then processing the mixture with optional additional surface additives in a conical mixer. The method produces toner particles that have high circularity and sharper particle size distribution. The surface processing of the toner particles does not affect the internal constituents of the toner particles.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: March 18, 2014
    Assignee: Xerox Corporation
    Inventors: Paul Casalmir, Bryan L. Norcott
  • Patent number: 8663891
    Abstract: Disclosed are a toner for developing an electrostatic latent image and a method of preparing the same. The toner may include latex, a pigment and a releasing agent. The lowest crossover temperature of the toner at which the storage modulus (G?) and the loss modulus (G?) of the toner are substantially equal to each other may be in the range of about 65 to about 80° C. The weight average molecular weight (Mw) of the toner may be in the range of about 65,000 to about 75,000. The z-average molecular weight (Mz) of the toner may be in the range of about 110,000 to about 220,000.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: March 4, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jun-Young Lee, Min-Young Cheong, Jae-Hwan Kim, Yo-Da Shin, Tae-Hoe Koo
  • Patent number: 8623581
    Abstract: An electrostatic image developing toner including: toner particles each containing binder resin and colorant; and an external additive supported on the toner particles, wherein the toner particles each have protrusions on surface thereof, average of lengths of long sides of the protrusions is 0.10 ?m or more but less than 0.50 ?m, standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, coverage rate of the protrusions on the surface of each toner particle is 30% to 90%, the external additive includes at least two different particles including external additive (A) and one or more external additives (B), external additive (A) has longest average primary particle diameter among the external additives and charged to have the opposite polarity to the toner particles, and at least one of the external additives (B) is charged to have the same polarity as the toner particles.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: January 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Fukao, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomoharu Miki
  • Patent number: 8614040
    Abstract: An electrostatic image developing toner including: toner particles; wherein the toner particles each contain: a core particle including a first resin and a colorant; and fine resin particles each formed of a second resin and existing in a surface of the core particle, wherein part of each fine resin particle is embedded in the core particle to form an embedded region, and the remaining part of the fine resin particle is exposed on the surface of the core particle to form an exposed region, and wherein each toner particle satisfies an expression of R1>R1? where, in a cross-section of the toner particle, R1? denotes an average diameter of openings of the first resin in which the second resin is embedded and R1 denotes an average diameter of the exposed regions.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: December 24, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Fukao, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomoharu Miki
  • Patent number: 8609315
    Abstract: A transparent toner includes toner particles having a volume average particle diameter in the range of 18 ?m to 28 ?m, and satisfying formulae (1) and (2): 0.1?Ntb/Nta×100?2.5??(1) 0?Ntc/Nta×100?1.0??(2) Nta is the number of particles under the measurement conditions satisfying 0.5 ?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Ntb is the number of particles under the measurement conditions satisfying 0.5×Dta (?m)?circle-equivalent diameter?2.5×Dta (?m), and 0.60?circularity?0.90; and Ntc is the number of particles under the measurement conditions satisfying 2.5×Dta (?m)?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Dta is the average circle-equivalent diameter under the measurement conditions satisfying 0.5?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Tsuyoshi Murakami
  • Publication number: 20130323633
    Abstract: A brilliant toner includes toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; and an external additive, wherein a ratio (X/Y) of a specific surface area X (m2/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m2/g) of the toner particles is from 0.3 to 1.0.
    Type: Application
    Filed: November 9, 2012
    Publication date: December 5, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shotaro TAKAHASHI, Masaru TAKAHASHI, Sakiko HIRAI, Atsushi SUGITATE, Shuji SATO
  • Patent number: 8592121
    Abstract: An electrostatic image developing toner for pressure fixing includes a binder resin that has a sea-island structure, wherein a difference between a glass transition temperature of a resin forming the sea phase and a glass transition temperature of a resin forming the island phase is about 30° C. or more, both of the glass transition temperatures of the resin forming the sea phase and the resin forming the island phase are less than about 55° C., and the island phase has a major axis of about 150 nm or less.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: November 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yasuo Matsumura