To Produce Color Reproduction (i.e., Two Or More Colors Specified) Patents (Class 430/42.1)
  • 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
  • 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
  • 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: 20120202022
    Abstract: Printed products, printing methods and methods for authenticating a printed product are provided. In one aspect, the printed product has a receiver member and an image formed thereon by an electrophotographic printing process using toner particles, said image having at least one portion being at least partially formed by bi-fluorescent toner particles. Methods for printing and authenticating the same are provided.
    Type: Application
    Filed: February 8, 2011
    Publication date: August 9, 2012
    Inventor: Detlef Schulze-Hagenest
  • Publication number: 20120202021
    Abstract: Printed products, printing methods and methods for verifying authenticity of a printed product are provided. In one aspect, the printed product has a receiver member and an image formed thereon by an electrophotographic process using toner particles, said image having at least one raised portion, wherein at least parts of said raised portion of said image comprise pearlescent toner particles. Methods for printing and authenticating the same are provided.
    Type: Application
    Filed: February 8, 2011
    Publication date: August 9, 2012
    Inventors: Detlef Schulze-Hagenest, Dinesh Tyagi
  • Patent number: 8190062
    Abstract: In an image forming apparatus that includes an image carrier, a charging unit, a latent-image forming unit that forms a latent image for each color by exposing the surface of the image carrier charged by the charging unit, and a plurality of developing units that sequentially develops latent images formed on the image carrier with toners of different colors including at least cyan, yellow, and magenta, to form a color toner image on a single unit of the image carrier, the developing units further develops the latent images with toners of blue, green, and red, such that the toner images of different colors are not superimposed on a same position.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: May 29, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Hitoshi Maruyama, Kenichiroh Saisho
  • Patent number: 8158313
    Abstract: An image forming apparatus configured (a) to charge uniformly an image bearing member once, (b) to form a latent image including n levels of electric potential on the image bearing member with a single exposure, (c) to adhere a first toner on a portion of the image bearing member which has the lowest electric potential, (d) to decrease the electric potential of a portion of the image bearing member not developed with the first toner by uniformly exposing light at a first wavelength whose transmission factor is lowest for the first toner, (e) to develop using a second toner a portion of the image bearing member which has the second lowest electric potential, (f) to perform a second uniform exposure at a wavelength whose transmission factor is lowest for both the first toner and the second toner, (g) to develop using a third toner a portion of the image bearing member which has the third lowest electric potential, (h) to perform a third uniform exposure at a wavelength whose transmission factor is lowest for ea
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: April 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeo Tsukamoto, Katsuo Sakai, Tomoko Takahashi
  • Patent number: 8092969
    Abstract: A process for forming a full-color image, wherein the 4 color toners each have an apparent viscosity at 105° C. of 50,000 to 300,000 Pa·s and an apparent viscosity at 130° C. of 3,000 to 30,000 Pa·s, and as a color toner arranged at the outermost layer on a transfer medium among the 4 color toners, a toner, in which a maximum peak or a shoulder peak is present between 105° C. and 130° C. in a temperature-logarithmic melt viscosity graph, is used, and as the other color toners arranged at lower layers than the outermost layer, toners, in which neither the maximum peak nor the shoulder peak is present between 105° C. and 130° C., are used.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: January 10, 2012
    Assignee: Zeon Corporation
    Inventor: Kazu Niwa
  • Patent number: 8034523
    Abstract: A full color toner containing a binder resin, a release agent and a colorant is provided, wherein the binder resin contains a polyester resin containing a hybrid resin containing one or more vinyl group polymer units and one or more polyester units, and wherein the content A of the hybrid resin and the content B of the release agent satisfy the following relationship: B/2?A?3B.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: October 11, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kumi Hasegawa, Mitsuo Aoki, Minoru Masuda, Hyo Shu
  • Patent number: 8007973
    Abstract: A full-color toner kit including yellow, magenta, and cyan toners each including a benzimidazolone, a naphthol, and a copper phthalocyanine colorants, respectively, and resins (A) and (B) each of which having a polyester skeleton and containing a wax, and a resin (C) having a polyester skeleton and containing no wax. Each of the toners has a softening point of from 125° C. to 135° C. The following relationships are satisfied: Ts(A)<Ts(B), Ay+5?Am?Ay+15, and Ac+5?Am?Ac+15, wherein Ts(A) and Ts(B) (° C.) each represent softening points of the resin (A) and (B), respectively, and Ay, Am, and Ac each represent ratios (% by weight) of the amount of the resin (A) to total amount of the resins (A) and (B) in the yellow, magenta, cyan toners, respectively.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company, Limited
    Inventors: Kazuoki Fuwa, Yoshihiro Mikuriya, Masayuki Hagi, Hideaki Yasunaga, Hiroaki Katoh, Yoshitaka Sekiguchi
  • Patent number: 8007969
    Abstract: A xerogrpahic system and method use a tri-level development process in which at least one xerographic imaging unit includes a photoreceptor and a pair of developer units. A first developer unit includes a conventional first toner of a given color (CYMK) and a second developer unit includes a hypochromatic light form of the first toner. By use of a specific tri-level process, excellent color-to-color registration can be achieved for each processed color separation because overlap between colorants can be prevented. Moreover, by use of two forms of the same colorant, a smoother tone reproduction curve can be achieved when an aggressive blending strategy is used. Gamut loss and ink limit violation can be avoided by adjusting the blending curve in certain situations.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: August 30, 2011
    Assignee: Xerox Corporation
    Inventor: David J. Lieberman
  • Publication number: 20110207037
    Abstract: Disclosed is a manufacturing method for forming a full color image and an apparatus for forming a full color image exhibiting excellent color chroma for a secondary color and extension of a color reproduction area in a range of red to orange color. A method for forming a full color image using at least six colors of an electrostatic image developing toner each comprising a resin and a colorant, wherein six colors of an electrostatic image developing toner are a yellow toner, a magenta toner, a cyan toner, an orange toner, a green toner and a black toner, and the colorant containing in the orange toner is a pyrazolone pigment.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 25, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Hajime TADOKORO, Kaori SOEDA, Hidemasa SAWADA, Miyuki MURAKAMI, Yohei OHNO
  • Publication number: 20110188869
    Abstract: According to one embodiment, a cleaner-less mechanism is provided only in a black image forming unit, and a cleaning apparatus is provided in a color image forming unit. Otherwise, when an image adjustment function is executed, the number of operations of forming an image adjustment pattern corresponding only to a black developing agent is reduced.
    Type: Application
    Filed: January 14, 2011
    Publication date: August 4, 2011
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Tetsuya Nakamura
  • Publication number: 20110151362
    Abstract: An electrostatic image developing gray toner is disclosed. The gray toner is composed of toner particles comprising a binding resin, two species of chromatic color coloring agents and carbon black in an amount of 0 to 0.001 weight % of amount of the chromatic color coloring agents, the toner having brightness L* of 30 to 90 and chroma C* of not more than 10 in L*a*b* color system measured in single solid toner image formed by only the gray toner having an amount of toner attached of 4 g/m2, and the two species of chromatic color coloring agents satisfying mutually complementary color relation.
    Type: Application
    Filed: December 6, 2010
    Publication date: June 23, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Kaori SOEDA, Miyuki MURAKAMI
  • Publication number: 20110081606
    Abstract: Disclosed is an electrostatic image developing toner comprised of toner particles containing a binding resin and a coloring agent, and the coloring agent contains a black color material and a cyan color material, the content of the black color material being 0.5 to 3 parts by mass with respect to 100 parts by mass of the above binding resin, as well as the content of the cyan color material being 0.1 to 0.5 parts by mass with respect to 100 parts by mass of the above binding resin.
    Type: Application
    Filed: September 28, 2010
    Publication date: April 7, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hidemasa SAWADA, Kazuhiko NAKAJIMA, Miyuki MURAKAMI
  • Patent number: 7877053
    Abstract: By using a high or low viscosity transparent toner, with respect to the other color toners, and different amounts of transparent toner lay-down, the gloss of an image printed by an electrophotographic device may be adjusted. By also applying the transparent toner as a negative mask, the differential gloss of the image may be reduced while still adjusting the gloss of certain portions of the image. Further, because different gloss levels may appear different at different viewing angles, transparent toner may be laid down to encode a transparent image within the image being printed. Such a transparent image may be useful as, for example, an authentication means for a document. Additionally, by varying the gloss levels on particular aspects of a printed image, multiple images of different gloss levels, which are prominent at different viewing angles can be made, thereby, a three-dimensional image effect can be achieved on the printed page.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: January 25, 2011
    Assignee: Eastman Kodak Company
    Inventors: Yee S. Ng, Hwai-Tzuu Tai
  • 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: 7728858
    Abstract: An image forming apparatus uses toner that is given color-generation information and a color-generation state or a non-color-generation state of the toner is controlled, and includes an image carrier, a unit that forms toner image on the image carrier, an intermediate transfer medium that the toner image formed on the image carrier is transferred to, a first transfer unit that transfers the toner image to the intermediate transfer medium surface, a unit that gives color-generation information to the toner image transferred to the intermediate transfer medium, a second transfer unit that transfers the toner image transferred to the intermediate transfer medium surface to a recording medium, a unit that fixes the toner image transferred to the recording medium and a unit that causes color generation in the toner image that the color-generation information is given.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: June 1, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yukio Hara, Isao Ito
  • Publication number: 20090305154
    Abstract: A xerogrpahic system and method use a tri-level development process in which at least one xerographic imaging unit includes a photoreceptor and a pair of developer units. A first developer unit includes a conventional first toner of a given color (CYMK) and a second developer unit includes a hypochromatic light form of the first toner. By use of a specific tri-level process, excellent color-to-color registration can be achieved for each processed color separation because overlap between colorants can be prevented. Moreover, by use of two forms of the same colorant, a smoother tone reproduction curve can be achieved when an aggressive blending strategy is used. Gamut loss and ink limit violation can be avoided by adjusting the blending curve in certain situations.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 10, 2009
    Applicant: XEROX CORPORATION
    Inventor: David J. LIEBERMAN
  • 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: 20090239164
    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 excellent light stability is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue 76. There are also disclosed a full-color toner kit and an image forming method by use of the toner.
    Type: Application
    Filed: March 18, 2009
    Publication date: September 24, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Mikio KOUYAMA, Hiroshi YAMAZAKI, Ken OHMURA, Kenji HAYASHI
  • Patent number: 7531276
    Abstract: The invention provides a color image forming method including charging, developing, transferring and fixing. The fixing includes thermally fixing a toner image to paper by using a heating body and a pressurizing member which is positioned opposite to the heating body via a film-like member. The color toner includes a toner particle containing a crystalline resin and a non-crystalline resin. When the color toner is subjected to dynamic viscoelasticity measurement employing a sine wave vibration method, a minimum value of the relaxation elasticity H in a relaxation spectrum obtained from frequency dispersion characteristics when a measurement frequency measured at 60 and 80° C. is 0.1 to 100 rad/sec and a measurement strain at a frequency of 6.28 rad/sec is 0.1 %, is in a range of about 10 to 900 Pa/cm2. A relaxation time ? corresponding to the minimum value is in a range of about 1 to 10,000 sec.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: May 12, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takao Ishiyama, Masanobu Ninomiya, Hiroshi Nakazawa
  • Publication number: 20080213681
    Abstract: An image forming apparatus for forming a color image of CMK color plates by electrophotography system in which a K color plate having highest visibility among CMYK colors is composed of a rational number mesh. Profile of halftone dots (201Kh) becomes constant substantially and the factor for generating streak and unevenness is suppressed. Furthermore, C color plate and M color plate are formed of super cells and the K color plate, C color plate and M color plate are formed at an interval of 30°. Consequently, a Rosetta formed of halftone dots (201Ch, 201Mh, 201Kh) of CMK is optimized and the factor for generating moiré component is suppressed.
    Type: Application
    Filed: January 25, 2006
    Publication date: September 4, 2008
    Applicant: Fujifilm Corporation
    Inventor: Makoto Sugizaki
  • Patent number: 7421223
    Abstract: In an implementation of a printing system, an electrophotographic imaging plate electrostatically attracts a first concentration of an ink having a particular color. A developer unit is biased with a developer voltage and the first concentration of the ink is transferred onto the electrophotographic imaging plate from the developer unit according to the developer voltage. The electrophotographic imaging plate then electrostatically attracts a second concentration of the ink. The developer unit is biased with an adjusted developer voltage and the second concentration of the ink is transferred onto the electrophotographic imaging plate from the developer unit according to the adjusted developer voltage.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: September 2, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Rodolfo Jodra, Bruce J. Jackson
  • Publication number: 20080159777
    Abstract: A full-color toner kit including yellow, magenta, and cyan toners each including a benzimidazolone, a naphthol, and a copper phthalocyanine colorants, respectively, and resins (A) and (B) each of which having a polyester skeleton and containing a wax, and a resin (C) having a polyester skeleton and containing no wax. Each of the toners has a softening point of from 125° C. to 135° C. The following relationships are satisfied: Ts(A)<Ts(B), Ay+5?Am?Ay+15, and Ac+5?Am?Ac+15, wherein Ts(A) and Ts(B) (° C.) each represent softening points of the resin (A) and (B), respectively, and Ay, Am, and Ac each represent ratios (% by weight) of the amount of the resin (A) to total amount of the resins (A) and (B) in the yellow, magenta, cyan toners, respectively.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 3, 2008
    Inventors: Kazuoki Fuwa, Yoshihiro Mikuriya, Masayuki Hagi, Hideaki Yasunaga, Hiroaki Katoh, Yoshitaka Sekiguchi