Developing Composition Having Subtractive Colorant (i.e., Cyan, Magenta, Or Yellow) Patents (Class 430/45.5)
  • Patent number: 10459360
    Abstract: A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: October 29, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Namie Suzuki, Hisashi Nakajima, Kazumi Suzuki, Yoshitaka Yamauchi
  • Patent number: 10270017
    Abstract: The present invention relates to a laminate film including a resin layer having a thickness of from 10 ?m to 125 ?m; and a toner layer formed on one surface of the resin layer, in which the resin layer is formed from a resin material having a glass transition temperature of 130° C. or higher, the toner layer has a plurality of voids, and when a value defined by the following formula (S1) using the void area ratio, which represents the ratio of the area of exposed voids, for the respective faces of the surface of the toner layer and a cross section of the toner layer, is designated as porosity, and when two void area ratios respectively corresponding to the cross sections of the toner layer in two orthogonally intersecting directions are used as the void area ratios of the cross sections of the toner layer, the porosities respectively calculated according to the two void area ratios are both from 0.01% to 0.40%.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: April 23, 2019
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shohei Azami, Masanobu Matsubara
  • Patent number: 9895921
    Abstract: A method for producing a document blank or a security document includes providing a substrate layer having a metal layer or applying a metal layer to a substrate layer, forming a color-effective pattern in or on the metal layer, in which the pattern has a pixel structure and each pixel includes at least two subpixels which cause a monochromatic color effect, and joining together the substrate layer and at least one further transparent substrate layer to form a document body. A security document blank, a personalized security document and a method for the laser personalization of security document blanks in color are also provided.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: February 20, 2018
    Assignee: Bundesdruckeri GmbH
    Inventor: Edward Springmann
  • Patent number: 9829819
    Abstract: A toner set for electrostatic image development includes a cyan toner, a magenta toner, and a yellow toner, wherein the Vicat softening temperatures of the toners are respectively in the range of from about 30° C. to about 60° C., and among the toners, the difference between the Vicat softening temperature of the toner having the highest Vicat softening temperature and the Vicat softening temperature of the toner having the lowest Vicat softening temperature is from about 1° C. to about 5° C.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: November 28, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Hiroko Kobayashi
  • Patent number: 9341980
    Abstract: A process unit includes a latent image bearer, a developer bearer, a regulator, a supplier, and at least one voltage applicator. The latent image bearer bears a latent image on a surface thereof. The developer bearer supplies a developer onto the latent image bearer to make the latent image a visible image. The regulator regulates a thickness of a layer of the developer on the surface of the developer bearer. The supplier supplies the developer to the developer bearer. At least one voltage applicator applies a voltage to the developer bearer and the latent image bearer.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: May 17, 2016
    Assignee: Ricoh Company, Ltd.
    Inventor: Takahiro Sanada
  • Patent number: 8841051
    Abstract: Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* colorimetric system of not less than 58 and not more than 75.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: September 23, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shiro Hirano, Naohiro Hirose, Kaori Soeda, Miyuki Murakami, Youhei Ohno
  • Patent number: 8728689
    Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: May 20, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasukazu Ayaki, Shigeto Tamura
  • Patent number: 8492060
    Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: July 23, 2013
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
  • Publication number: 20120219892
    Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 30, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yohei OHNO, Hajime TADOKORO, Kaori MATSUSHIMA, Hiroyuki YASUKAWA, Ito KOGA
  • Patent number: 8187782
    Abstract: Disclosed is a process of forming a full color image according to electrophotography, employing a yellow toner, a magenta toner and a cyan colorant, the process comprising the step of forming a yellow toner image, a magenta toner image and a cyan toner image on a recording material, wherein the yellow toner image has reflectance (in terms of %) satisfying formulas (11) through (14) below, the magenta toner image has reflectance (in terms of %) satisfying formulas (21) through (24) below, and the cyan toner image has reflectance (in terms of %) satisfying formulas (31) through (34) below.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: May 29, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tatsuya Fujisaki, Mikio Kouyama, Kenji Hayashi, Hiroyuki Yasukawa, Natsuko Kusaka
  • Patent number: 8085442
    Abstract: In a method of producing a tiled print product, the print product is composed of a plurality of print substrates that are printed separately and are disposed adjacent to one another in at least one row. Each substrate is printed by means of a print process that creates a gloss gradient in a characteristic direction of production that is parallel to the row. The characteristic direction of production is inverted for every second substrate in the row.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: December 27, 2011
    Assignee: OCE-Technologies B.V.
    Inventor: Cornelis A. De Waal
  • Patent number: 7985518
    Abstract: An image forming apparatus of the present invention includes a latent electrostatic image bearing member, a latent electrostatic image forming unit configured to form a latent electrostatic image on the latent electrostatic image bearing member, at least three developing units each configured to develop the latent electrostatic image using a toner to form a visible image, a transferring unit configured to transfer the visible image on a recording medium, and an image fixing unit configured to the transferred image on the recording medium, in which the developing units respectively include any one of a yellow toner, a magenta toner, and a cyan toner, the magenta toner includes C.I. pigment red 269, and the yellow toner includes C.I pigment yellow 180 or C.I pigment yellow 155.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: July 26, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Hyo Shu, Mitsuo Aoki, Minoru Masuda, Kumi Hasegawa
  • Patent number: 7835028
    Abstract: An image forming apparatus includes an image holding member, a toner image forming unit, a color forming information applying unit, a transfer unit, a fixing unit and a color forming unit, the color forming information applying unit exposing a toner image formed on a surface of the image holding member from a back surface side of the image holding member, light transmitted through the image holding member applying color forming information to the toner image.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: November 16, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Isao Ito
  • Patent number: 7704654
    Abstract: An embodiment may be an image forming method, which comprises forming a latent image on an image carrier; developing the latent image with a toner to form a toner image on the image carrier; transferring the toner image; and applying ultrasonic vibration at one of the developing step and the transferring step. The toner comprises a resin particle and a release agent particle having a melting point in a range of 40 to 75° C. and the toner has Dp50 of 3.0 to 5.0 ?m.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 27, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroshi Yamazaki, Meizo Shirose, Masafumi Uchida
  • Publication number: 20090291375
    Abstract: Disclosed is a process of forming a full color image according to electrophotography, employing a yellow toner, a magenta toner and a cyan colorant, the process comprising the step of forming a yellow toner image, a magenta toner image and a cyan toner image on a recording material, wherein the yellow toner image has reflectance (in terms of %) satisfying formulas (11) through (14) below, the magenta toner image has reflectance (in terms of %) satisfying formulas (21) through (24) below, and the cyan toner image has reflectance (in terms of %) satisfying formulas (31) through (34) below.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 26, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Tatsuya FUJISAKI, Mikio KOUYAMA, Kenji HAYASHI, Hiroyuki YASUKAWA, Natsuko KUSAKA
  • Publication number: 20090246656
    Abstract: An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and achieving enhanced lightfastness is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Red 209. There are also disclosed a full-color toner kit and an image forming method by use of the toner.
    Type: Application
    Filed: March 20, 2009
    Publication date: October 1, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Mikio KOUYAMA, Hiroshi YAMAZAKI, Ken OHMURA, Kenji HAYASHI
  • Patent number: 7514190
    Abstract: An electrophotographic image forming method is disclosed, which includes the steps of developing an electrostatic image on a electrophotographic photoreceptor by a developer, transferring a toner image formed by the development, and fixing the toner image on a recording medium. It is disclosed that a toner has a volume particle diameter (Dv50) of about 4.4 to about 5.8 ?m and displays two or more endothermic peaks measured by DSC being within the rang of from about 50 to about 73° C. and the endothermic heat amount thereof is from 12.6 to 24.5 J/mg and a transferring member and/or a fixing member constituted by a belt containing a polyimide resin are employed in the method.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: April 7, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Ken Ohmura, Asao Matsushima
  • Patent number: 7442478
    Abstract: A magenta toner is provided which contains at least a binder resin, a colorant, and a wax, in which a maximum heat-absorption peak temperature as measured using a differential scanning calorimeter, a reflectance at a predetermined wavelength when measured in a powder state by spectroscopic analysis, and lightness when measured in a powder form are in specific ranges. A full-color image is formed using the magenta toner as a pale magenta toner in combination with a deep magenta toner. According to the present invention, it becomes possible to form a vivid image which has reduced graininess and roughness from a low-density region to a high-density region, ensures a sufficient fixing temperature region, has a color reproduction range wider that the conventional one, and has high transparency on an OHP sheet.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 28, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Itakura, Yuko Sato, Hiroyuki Fujikawa, Nobuyoshi Sugahara, Hirohide Tanikawa
  • Publication number: 20080113284
    Abstract: An electrostatic image forming method is described. The method includes forming latent images corresponding to yellow, magenta and cyan images on a photoreceptor, developing corresponding latent images by developers containing yellow, magenta and cyan toner to form yellow, magenta and cyan images and transferring the yellow, magenta and cyan images on a recording material, and the yellow toner and the magenta have specific reflectance characteristics described in the specification.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 15, 2008
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kenji HAYASHI, Mikio KOUYAMA, Hiroyuki YASUKAWA, Hiroaki OBATA, Natsuko KUSAKA, Tatsuya FUJISAKI
  • Publication number: 20070190445
    Abstract: An electrostatic image developing toner is disclosed, comprising a resin and a colorant, wherein the toner contains at least one iminocarboxylic acid or its salt in an amount of from 26 to 388 ppm by mass.
    Type: Application
    Filed: January 24, 2007
    Publication date: August 16, 2007
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Eiichi YOSHIDA, Masahiko NAKAMURA, Kaori SOEDA, Tomoko MINE, Kenichi ONAKA