Patents by Inventor Varun Sambhy

Varun Sambhy 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: 8511794
    Abstract: A magnetic ink printer includes an ink collector to remove residual magnetic ink from a printhead face. The ink collector uses a magnetic member to produce a magnetic field that acts on the magnetic ink to remove the ink from the printhead face with little or no wiping of the printhead face. The magnetic ink is collected for possible reuse in the printhead.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: August 20, 2013
    Assignee: Xerox Corporation
    Inventors: Michael D. Thompson, Bruce Earl Thayer, Varun Sambhy
  • Patent number: 8475704
    Abstract: Exemplary embodiments provide materials and methods for ink jet printhead nozzle plate and related printing apparatus, wherein the ink jet printhead nozzle plate can include a coaxially electrospun layer to provide a low adhesion oleophobic textile surface exhibiting a low sliding angle and a high contact angle with ultra-violet gel ink and/or solid ink.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: July 2, 2013
    Assignee: Xerox Corporation
    Inventors: Hong Zhao, Kock-Yee Law, Varun Sambhy
  • Publication number: 20130096254
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises an oleophobic low adhesion coating having high thermal stability as indicated by less than about 15 percent weight loss when heated to up to 300° C., and wherein a drop of ultra-violet (UV) gel ink or a drop of solid ink exhibits a contact angle of greater than about 45° and sliding angle of less than about 30° with a surface of the coating, wherein the coating maintains the contact angle and sliding angle after the coating has been exposed to a temperature of at least 200° C. for at least 30 minutes.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 18, 2013
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Kock-Yee Law, Hong Zhao, Peter Michael Gulvin, James M. Casella
  • Publication number: 20130093814
    Abstract: A printhead has a nozzle plate, having an array of nozzles through which ink is expelled, a low adhesion, oleophobic polymer coating on a front face of the nozzle plate. A printer has a source of solid ink, a heater arranged to-heat the solid ink and convert it to liquid ink, and a printhead, the printhead having a nozzle plate, having an of nozzles through which ink is expelled, a low adhesion, oleophobic polymer coating on a front face of the nozzle plate, the coating selected to dispel the liquid ink prior to the liquid ink returning to solid form, and a wiper positioned to wipe the front face of the nozzle plate.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 18, 2013
    Applicant: XEROX CORPORATION
    Inventors: Peter Michael Gulvin, Varun Sambhy, Hong Zhao, Kock-Yee Law, James M. Casella
  • Patent number: 8382270
    Abstract: Release layers, and particularly low surface tension aqueous solutions, such as fountain solutions, which function as release layers. These release layers are integrated into copying and printing machines, such as xerographic machines, multifunctional devices, color systems, and the like, wherein the release layers are specifically incorporated onto a hydrophilic roll material for contact leveling of UV curable gel inks.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: February 26, 2013
    Assignee: Xerox Corporation
    Inventors: Varun Sambhy, Bryan J. Roof, Kock-Yee Law, Peter G. Odell, Michelle N. Chretien, Jennifer L. Belelie, Gordon Sisler, Christopher Wagner
  • Patent number: 8384748
    Abstract: Exemplary embodiments provide materials and methods for a printer member used in ink-jet marking systems that can include a layer electrospun over an aluminum roller to facilitate transport of a printable substrate having ink images thereon and to reduce ink offset from the printable substrate.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: February 26, 2013
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Hong Zhao, Varun Sambhy
  • Publication number: 20130032051
    Abstract: A method and structure for an ink jet printhead aperture plate assembly which can be part of an ink jet printhead and an ink jet printer. The present teachings can include the use of a protective coverlay interposed between a press plate of a press and an anti-wetting coating on a polyimide layer which forms part of the aperture plate assembly. The coverlay can include a base material which has an elastic modulus which is at least a specified value. An embodiment of the present teachings can form an aperture plate assembly and an ink jet printhead having reduced dimpling and deformation around a nozzle opening in the aperture plate assembly.
    Type: Application
    Filed: August 1, 2011
    Publication date: February 7, 2013
    Applicant: XEROX CORPORATION
    Inventors: James M. Casella, Peter M. Gulvin, Varun Sambhy, Kock-Yee Law, Hong Zhao
  • Patent number: 8270889
    Abstract: Various embodiments provide low adhesion coatings that can be used for an image-side member in an image fixing system of an electrophotographic printer or an ink jet printer, wherein the low adhesion coatings can exhibit a low sliding angle ranging from about 1° to about 30° with a solid ink, a toner, hexadecane and/or water.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: September 18, 2012
    Assignee: Xerox Corporation
    Inventors: Varun Sambhy, Dale R. Mashtare, Kock-Yee Law, Rachel L. McGrath
  • Patent number: 8226207
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a low adhesion coating, wherein when the low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a low sliding angle with the printhead front face surface, wherein the low sliding angle is less than about 1° to less than about 30°. In embodiments, the low adhesion coating is an oleophobic coating that exhibits a contact angle of greater than about 35° with ultra-violet gel ink or solid ink.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: July 24, 2012
    Assignee: Xerox Corporation
    Inventors: Gregory J. Kovacs, Kock-Yee Law, Hong Zhao, Varun Sambhy
  • Publication number: 20120162312
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a low adhesion coating, wherein when the low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a low sliding angle with the printhead front face surface, wherein the low sliding angle is less than about 1° to less than about 30°. In embodiments, the low adhesion coating is an oleophobic coating that exhibits a contact angle of greater than about 35° with ultra-violet gel ink or solid ink. The coating can further be used for an ink jet printhead flexure chute.
    Type: Application
    Filed: December 24, 2011
    Publication date: June 28, 2012
    Applicant: Xerox Corporation
    Inventors: David Kenneth Ahl, Varun Sambhy
  • Publication number: 20120154487
    Abstract: Various embodiments provide oleophobic, low adhesion coatings with high thermal stability and methods of forming and using them in an ink jet printhead, wherein the oleophobic, low adhesion coatings can include a sol-gel cross-linked coating by a self-condensation process of at least a silane-functionalized perfluoropolyether based polymer precursor.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 21, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Kock-Yee Law, Hong Zhao, Samarth Chugh
  • Publication number: 20120044298
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a oleophobic low adhesion coating. When the oleophobic low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a contact angle greater than 45° and a low sliding angle of less than about 30°. In embodiments, the oleophobic low adhesion coating is thermally stable wherein the surface contact angle and sliding angle show little degradation after the coating is subjected to high temperatures in a range between 180° and 320° or thereabout and high pressures in a range between 100 psi and 400 psi or thereabout during printhead fabrication and manufacturing.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Kock-Yee Law, Hong Zhao, Samarth Chugh
  • Publication number: 20120042518
    Abstract: A method for producing an inkjet printhead that includes aligning and stacking together an aperture plate and a plurality of jetstack plates; bonding together the aperture plate and plurality of jetstack plates; and depositing a layer of coating material to a surface of the aperture plate by inkjet printing to form a coating on at least a portion of the surface of the aperture plate.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee LAW, Yuanjia Zhang, Varun Sambhy
  • Publication number: 20120039648
    Abstract: Various embodiments provide low adhesion coatings that can be used for an image-side member in an image fixing system of an electrophotographic printer or an ink jet printer, wherein the low adhesion coatings can exhibit a low sliding angle ranging from about 1° to about 30° with a solid ink, a toner, hexadecane and/or water.
    Type: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Dale R. Mashtare, Kock-Yee Law, Rachael L. McGrath
  • Patent number: 8096649
    Abstract: A contact leveling surface for an ink jet imaging member comprising a low adhesion coating, wherein when the low adhesion coating is disposed on a contact leveling surface, jetted drops of ultra-violet gel ink exhibit a low sliding angle with the contact leveling surface, wherein the low sliding angle is less than about 1° to less than about 30°.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 17, 2012
    Assignee: Xerox Corporation
    Inventors: Varun Sambhy, Bryan J. Roof, Kock-Yee Law, Hong Zhao
  • Publication number: 20110304674
    Abstract: Release layers, and particularly low surface tension aqueous solutions, such as fountain solutions, which function as release layers. These release layers are integrated into copying and printing machines, such as xerographic machines, multifunctional devices, color systems, and the like, wherein the release layers are specifically incorporated onto a hydrophilic roll material for contact leveling of UV curable gel inks.
    Type: Application
    Filed: June 14, 2010
    Publication date: December 15, 2011
    Applicant: XEROX CORPORATION
    Inventors: Varun SAMBHY, Bryan J. Roof, Kock-Yee Law, Peter G. Odell, Michelle N. Chr+e,acu e+ee tien, Jennifer L. Belelie, Gordon Sisler, Christopher Wagner
  • Publication number: 20110189918
    Abstract: Exemplary embodiments provide materials and methods for ink jet printhead nozzle plate and related printing apparatus, wherein the ink jet printhead nozzle plate can include a coaxially electrospun layer to provide a low adhesion oleophobic textile surface exhibiting a low sliding angle and a high contact angle with ultra-violet gel ink and/or solid ink.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 4, 2011
    Applicant: XEROX CORPORATION
    Inventors: Hong ZHAO, Kock-Yee Law, Varun Sambhy
  • Publication number: 20110122195
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a low adhesion coating, wherein when the low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a low sliding angle with the printhead front face surface, wherein the low sliding angle is less than about 1° to less than about 30°. In embodiments, the low adhesion coating is an oleophobic coating that exhibits a contact angle of greater than about 35° with ultra-violet gel ink or solid ink.
    Type: Application
    Filed: November 24, 2009
    Publication date: May 26, 2011
    Inventors: Gregory J. Kovacs, Kock-Yee Law, Hong Zhao, Varun Sambhy
  • Publication number: 20110122210
    Abstract: A contact leveling surface for an ink jet imaging member comprising a low adhesion coating, wherein when the low adhesion coating is disposed on a contact leveling surface, jetted drops of ultra-violet gel ink exhibit a low sliding angle with the contact leveling surface, wherein the low sliding angle is less than about 1° to less than about 30°.
    Type: Application
    Filed: November 24, 2009
    Publication date: May 26, 2011
    Inventors: Varun Sambhy, Bryan J. Roof, Kock-Yee Law, Hong Zhao
  • Publication number: 20110025752
    Abstract: Exemplary embodiments provide materials and methods for a printer member used in ink-jet marking systems that can include a layer electrospun over an aluminum roller to facilitate transport of a printable substrate having ink images thereon and to reduce ink offset from the printable substrate.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee Law, Hong Zhao, Varun Sambhy