Patents by Inventor Dinesh Tyagi

Dinesh Tyagi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8147948
    Abstract: Printed articles are provided. In one aspect a printed article has a first toner image with a first toner particles having a median volume weighted diameter between about 3 um and 9 um and having a first charge-to-mass ratio, a second toner image with second toner particles having a median volume weighted diameter greater than about 20 um and having a charge-to-mass ratio that is between ? to ½ of the first charge-to-mass ratio times the ratio of the volume weighted average diameter of the first toner to the volume weighted average diameter of the second toner, and a receiver on which the first toner image and the second toner image are formed.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 3, 2012
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Muhammed Aslam, Donald S. Rimai
  • Publication number: 20120028184
    Abstract: A receiver having an image side and a non-image side bent in a bend area including a bend axis. Toner is deposited on the image side of the receiver in the bend area using an electrophotographic print engine. The deposited toner is fused to the receiver. During or after fusing, the fused toner is heated to a selected fusing temperature greater than or equal to the Tg of the toner. A heat-shrinkable film is affixed to the heated toner after heating the toner, wherein the Tg of the film is greater than the Tg of the toner. The toner is cooled below its Tg after affixing the film. The bend area of the receiver is reheated after cooling the toner, so that the temperature of the heat-shrinkable film rises above its Tg, the heat-shrinkable film contracts, and the receiver bends at the bend axis.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Inventor: Dinesh Tyagi
  • Publication number: 20120027481
    Abstract: Apparatus for bending a receiver having an image side and a non-image side in a bend area having a bend axis. Toner is deposited on the image side of the receiver in the bend area. A device compresses the deposited toner to form a toner film using a heated anvil and a selectively-cooled quencher that stretch and cooled the toner in the bend area below its Tg to form a toner film disposed over the surface of the receiver in the bend area. A heater reheats the bend area of the receiver so that temperature of the toner in the bend area rises above its Tg, so that the toner contracts and the receiver bends at the bend axis.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Inventor: Dinesh Tyagi
  • Publication number: 20120020697
    Abstract: A method and an apparatus of fixing a heat curable toner to a carrier substrate are shown. In the method, a toner applied to a first surface of the carrier substrate is heated above the glass transition temperature of the toner by microwave radiation, using at least one microwave applicator as a first heat source, to thereby initiate thermal cross-linking of polymer chains of said toner. The temperature is kept above the glass transition temperature of the toner for a predetermined time of at least one second, by applying heat to the toner by means of at least one non-contact second heat source, to thereby allow the thermal cross-linking to proceed further and to thereby raise the glass transition temperature of the toner.
    Type: Application
    Filed: December 9, 2008
    Publication date: January 26, 2012
    Inventors: Eric Carl Stelter, Dinesh Tyagi, James H. Hurst, Domingo Rohde, Knut Behnke, Detlef Schulze-Hagenest
  • Patent number: 8092970
    Abstract: A method and system for printing adjustable gloss image documents using a variety of toners where some toners have a relatively low melt viscosity and others have a relatively high melt viscosity. These toners are co-printed prior to fixing, on the receiver proximate to and overlying at least a portion of each other.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: January 10, 2012
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Yee S. Ng, Mark C. Zaretsky
  • Publication number: 20110200360
    Abstract: Electrophotographic printing of one or more layers of toner to enable the printing of a wide range of toner mass laydown using electrophotography to produce prints with raised letters. This method encompasses the steps of forming multicolor toner images and fusing the print one or more times to create the raised print. having the desired height of raised print.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 18, 2011
    Inventors: Dinesh Tyagi, Louise Granica, Thomas N. Tombs, Donald S. Rimai
  • Publication number: 20110200933
    Abstract: Electrophotographic printing of one or more layers of toner to enable the printing of a wide range of toner mass laydown using electrophotography to produce prints with raised letters. This method encompasses the steps of forming multicolor toner images and fusing the print one or more times to create the raised print having the desired height of raised print.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 18, 2011
    Inventors: Dinesh Tyagi, Louise Granica, Thomas N. Tombs, Donald S. Rimai
  • Publication number: 20110200932
    Abstract: Electrophotographic printing of one or more layers of toner to enable the printing of a wide range of toner mass laydown using electrophotography to produce prints with raised letters. This method encompasses the steps of forming multicolor toner images and fusing the print one or more times to create the raised print. having the desired height of raised print.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 18, 2011
    Inventors: Dinesh Tyagi, Thomas N. Tombs, Donald S. Rimai
  • Patent number: 7914963
    Abstract: The present invention is a toner that includes a polymeric binder and a polyethylene wax or ester wax. A dispersing agent of poly(ethylene vinyl acetate) is included in the toner that dispersed the wax and reduces the amount of free wax particles.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: March 29, 2011
    Assignee: Eastman Kodak Company
    Inventors: Robert D. Fields, Charles T. Havens, Peter S. Alexandrovich, Dinesh Tyagi
  • Publication number: 20110017834
    Abstract: A method for producing an antenna structure for an RFID device, a dry toner for use in producing an antenna for an RFID device and a RFID device comprising an antenna structure made of fused toner are disclosed. In a method for producing an antenna structure for an RFID device, a dry toner comprising a polymeric binder and metallic particles is provided. The toner comprises particles having a resistance allowing triboelectric charging or a resistance allowing inductive charging, wherein said metallic particles are nanoparticles having a mean particle size below approximately 500 nm in at least one direction. In the method, a continuous layer of the dry toner is applied to a substrate in a desired shape of an antenna via an electrophotographic printing process, and subsequently the toner is fused to the substrate by heating the toner above its glass transformation temperature.
    Type: Application
    Filed: December 22, 2007
    Publication date: January 27, 2011
    Inventors: Detlef Schulze-Hagenest, Dinesh Tyagi
  • Patent number: 7867678
    Abstract: A toner composition for fixing onto a receiver in conjunction with non-contact fuser capable of fusing one or more layers of toner on the receiver such that one or more toner layers reach a fusing temperature above a glass transition temperature. One or more cooling finish rollers are located downstream from the non-contact fuser to lower the toner temperature.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: January 11, 2011
    Assignee: Eastman Kodak Company
    Inventors: Andrew Ciaschi, Dinesh Tyagi, James H. Hurst, Arun Chowdry, Eric C. Stelter, Robert D. Bobo, Muhammed Aslam
  • Publication number: 20100329752
    Abstract: A method and apparatus for fusing a heat curable toner to a carrier sheet having said toner thereon. In the method, the toner is sandwiched between said carrier sheet and a movable fuser belt and heated to a first temperature by a first means, which first temperature is above a first glass transformation temperature of the toner. The toner is kept at an elevated temperature for a predetermined time by a second means, which elevated temperature is above the first glass transformation temperature, thereby raising the glass transformation temperature of the toner to a second glass transformation temperature. The apparatus has at least a first endless fuser belt, first heating means for heating the toner to a first temperature, second heating means located downstream of said first heating means for keeping the toner at an elevated temperature for a predetermined time and control means for controlling the first and second heating means.
    Type: Application
    Filed: December 17, 2007
    Publication date: December 30, 2010
    Inventors: Detlef Schulze-Hagenest, Arun Chowdry, Dinesh Tyagi, Domingo Rohde
  • Publication number: 20100195160
    Abstract: The invention describes a method to control differential gloss of halftone areas produced using substantially clear or low-pigmented toner. It is an objective of this invention to provide a method which allows to produce digital watermarks on paper without being limited in the gloss properties of the toner, the paper or and selected fusing technology. The present invention relates to a method producing clear, low density or highdensity watermarks using Glossmark technology using low-pigmented toner or clear toner. Glossmark technology is for controlling the differential gloss of an image using the steps selecting a first halftone image having a first anisotropic structure, selecting a second halftone image having a second structure different from that of the first halftone, applying the first halftone to at least some portion of the halftone image and applying the second halftone to another portion of the halftone image.
    Type: Application
    Filed: December 21, 2005
    Publication date: August 5, 2010
    Inventors: Detlef Schulze-Hagenest, Arun Chowdry, Dinesh Tyagi
  • Publication number: 20100164218
    Abstract: The invention describes a method providing prints with fluorescent effects on a document generated by color electrophotographic print processes, employing an electrophotographic printer equipped with five print modules, where four printing stations are equipped with black, yellow, magenta and cyan toners and a fifth station is equipped with substantially clear fluorescent toners to be printed on top of the color toners or directly on a substrate of the print document. In further developments of the present invention, the clear fluorescent toner absorbs light in the UV-A range or comprises metallic pigments or metallic effect pigments added to the clear fluorescent toner.
    Type: Application
    Filed: March 14, 2007
    Publication date: July 1, 2010
    Inventors: Detlef Schulze-Hagenest, Dinesh Tyagi
  • Patent number: 7687218
    Abstract: The present invention is a method for the preparation of electrostatographic toner including the following steps. A first dispersion is prepared with a solvent, a silicone wax, and a hyperdispersant. The first dispersion is added to an organic solvent containing a polymer material to form an organic phase. The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a second dispersion. The second dispersion is homogenized. The organic solvent is evaporated from the second dispersion and the resultant product is recovered, washed and dried. In an alternate method the hyperdispersant is added directly to the organic phase before mixing with the aqueous phase.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: March 30, 2010
    Assignee: Eastman Kodak Company
    Inventors: Xiqiang Yang, Dinesh Tyagi
  • Publication number: 20100051165
    Abstract: Electrographic printing of one or more toner layers having a particular pattern by electrographic techniques so that one layer acts as an adhesive, when fixed, for a thin film. Such electrographic printing comprises the steps of forming a desired print image, electrographically, on a receiver member utilizing marking particles; and applying the thin film in registration before activating the toner.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 4, 2010
    Inventors: Thomas N. Tombs, Dinesh Tyagi, Arun Chowdry, Leonard R. Christopher
  • Patent number: 7670642
    Abstract: The present invention provides a method of printing which includes providing a substrate having an inked surface. The inked surface is typically achieved using an offset lithographic printing press. A thermoplastic polymer powder is applied to the inked surface. The surface is then fused. An advantage of the prepared substrate is that there is reduced contamination of electrostatographic fusing systems when fused by heat and pressure fixing. Another aspect of the invention further provides a method of fusing a substrate having an inked surface wherein a thermoplastic powder has been applied to the inked surface prior to stacking the uncured offset prints.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: March 2, 2010
    Assignee: Eastman Kodak Company
    Inventors: Jerry A. Pickering, Xin Jin, Dinesh Tyagi, Kurt E. Jones
  • Patent number: 7655375
    Abstract: The present invention is a method for the preparation of electrostatographic toner including the following steps. A polymer material is dissolved in an organic solvent to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer and a salt including an anion selected from chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluromethylhydrate and a cation selected from aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion. The dispersion is homogenized. The organic solvent is evaporated from the dispersion and the resultant product is recovered, washed and dried. In an alternate method the salt is added directly to the dispersion.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: February 2, 2010
    Assignee: Eastman Kodak Company
    Inventors: Xiqiang Yang, Dinesh Tyagi, Lloyd A. Lobo, Patrick M. Lambert, Sandra G. Taft
  • Publication number: 20100015421
    Abstract: When color images are printed on a substantially transparent substrate, such as a transparency film, or on a highly colored substrate, the color properties of image may be compromised. When color images are printed on a substantially transparent substrate, the images do not have the maximum possible color saturation because a large portion of the incident light is not reflected back. As a result, images appear to be dull and lower in contrast. When color images are printed on highly colored substrates, the color properties of the image are also influenced by the color of the substrate. In order to enable printing on such substrates, an opaque toner was developed which comprises predispersed inorganic filler with a refractive index of greater than 1.75.
    Type: Application
    Filed: May 29, 2009
    Publication date: January 21, 2010
    Inventors: Dinesh Tyagi, Louise Granica
  • Patent number: 7632562
    Abstract: The invention relates to a printing media comprising a first side comprising a first exposed layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said exposed layer comprises a Tg of less than 5° C. and a second side comprising an a second exposed layer having an advancing contact angle with water of less than 90°.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: December 15, 2009
    Assignee: Eastman Kodak Company
    Inventors: Mridula Nair, Narasimharao Dontula, Michael R. Brickey, Terry A. Heath, Joseph W. Hoff, Tamara K. Jones, Daniel M. Leusch, Joseph S. Sedita, Cumar Sreekumar, Dinesh Tyagi