Patents by Inventor David H. Pan

David H. Pan 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: 7014897
    Abstract: A liquid ink imaging member having a top outer imaging surface is provided for receiving image forming ink droplets from a printhead. The liquid ink imaging member includes (a) a substrate member; (b) at least one elastomeric layer formed over the substrate member and including the top outer imaging surface; and (c) a surface texture formed into the top outer imaging surface and comprising asperities spaced apart at most from about one-half to about one pixel spot size for providing contact angle hysteresis to pin image forming ink droplets received thereon, thereby preventing ink droplet drawback, and resulting in quality images.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: March 21, 2006
    Assignee: Xerox Corporation
    Inventors: David H. Pan, James E. Williams, T. Edwin Freeman, Edward B. Caruthers, Jr., James R. Larson, Frank J. Bonsignore, Antonio DeCrescentis
  • Patent number: 6948806
    Abstract: A polyimide film substrate pre-heater assembly is provided for pre-heating substrates in an image producing machine and includes (a) plural rollers including a drive roller; (b) a substrate path defining and heating assembly for defining a portion of substrate path; and (c) a belt assembly including a polyimide film belt forming a loop. The loop forms a substrate transport nip against the substrate path defining and heating assembly. The polyimide film belt includes a polyimide film support layer, a puzzle cut seam having inter-fitting teeth and receptacle members, and a fluoroelastomeric overcoat layer for filling and strengthening the puzzle cut seam, thereby preventing the inter-fitting teeth and receptacle members thereof from popping up when the loop is driven over relatively small diameter rollers.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: September 27, 2005
    Assignee: Xerox Corporation
    Inventors: Ihor W. Tarnawskyj, Ralph A. Mosher, Laurence J. Lynd, David H. Pan, Eilleen R. Aviles
  • Patent number: 6939000
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a hybrid composition of an elastomer having a silicone material covalently bonded to a backbone of the elastomer, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: September 6, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Xiaoying Yuan, Donald S. Stanton, Anthony Yeznach, Trevor J. Snyder
  • Patent number: 6932470
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a silicone material and Q-resin, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: August 23, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Anthony Yeznach, Trevor J. Snyder
  • Patent number: 6923533
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a nano-size filler having an average particle size of from about 1 to about 250 nanometers, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: August 2, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha
  • Patent number: 6918664
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a latex fluoroelastomer, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: July 19, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Xiaoying (Elizabeth) Yuan, Anthony Yeznach, Trevor J. Snyder, Barry D. Reeves
  • Patent number: 6910765
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a haloelastomer having pendant chains covalently bonded to a backbone of the haloelastomer, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: June 28, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Donald S. Stanton, Anthony Yeznach, Trevor J. Snyder
  • Patent number: 6902269
    Abstract: A process for providing a layer on a marking member by dissolving a fluoroelastomer; adding and reacting a nano-size zinc oxide and a crosslinking agent, to form a resulting homogeneous fluoroelastomer dispersion, wherein the nano-size zinc oxide has a particle size of from about 1 to about 250 nanometers; and subsequently providing at least one layer of the homogeneous fluoroelastomer dispersion to the marking member.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: June 7, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Donald S. Stanton, Santokh S. Badesha
  • Patent number: 6899419
    Abstract: A phase change ink image producing machine including (a) a control subsystem for controlling operation of all subsystems and components of the image producing machine; (b) melting apparatus for melting solid phase change ink into melted molten liquid ink; (c) a printhead system located for receiving said melted molten liquid ink, said printhead system being connected to said control subsystem for ejecting droplets of melted molten liquid ink onto an imaging member to form an image and a liquid ink imaging member having a top outer imaging surface for receiving image forming ink droplets from a printhead.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: May 31, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, James E. Williams, T. Edwin Freeman, Edward B. Caruthers, Jr., James R. Larson, Frank J. Bonsignore, Antonio DeCrescentis
  • Patent number: 6843559
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a mica-type silicate material, and an optional heating member associated with the offset printing apparatus.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: January 18, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Anthony Yeznach, Trevor J. Snyder
  • Patent number: 6840615
    Abstract: An imaging surface field reconditioning method and apparatus are provided for reconditioning, in the field, a marking material control pattern on an imaging surface of in an image producing machine.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: January 11, 2005
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Ralph A. Mosher, James E. Williams, Richard J. Blum
  • Publication number: 20040222353
    Abstract: A phase change ink image producing machine including (a) a control subsystem for controlling operation of all subsystems and components of the image producing machine; (b) melting apparatus for melting solid phase change ink into melted molten liquid ink; (c) a printhead system located for receiving said melted molten liquid ink, said printhead system being connected to said control subsystem for ejecting droplets of melted molten liquid ink onto an imaging member to form an image and a liquid ink imaging member having a top outer imaging surface for receiving image forming ink droplets from a printhead.
    Type: Application
    Filed: June 8, 2004
    Publication date: November 11, 2004
    Applicant: Xerox Corporation
    Inventors: David H. Pan, James E. Williams, T. Edwin Freeman, Edward B. Caruthers, James R. Larson, Frank J. Bonsignore, Antonio DeCrescentis
  • Patent number: 6815136
    Abstract: A process including: dispersing a first liquid developer concentrate comprising a resin, a colorant, and a liquid developer reconstitution compound, in a carrier liquid, into additional carrier liquid to form a second liquid developer; depositing the second liquid developer onto a liquid receiver member to form a developer cake; developing an image with the developer cake; reclaiming undeveloped developer cake from the cake bearing liquid receiver member; and redispersing the reclaimed undeveloped developer cake in the second developer liquid.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: November 9, 2004
    Assignee: Xerox Corporation
    Inventors: Weizhong Zhao, Thomas W. Smith, David H. Pan, William M. Prest, Jr., Samuel Kaplan
  • Patent number: 6775499
    Abstract: Method and apparatus for transferring a developed image from an image bearing member to a receiver substrate in a Contact Electrostatic Printing (CEP) system may be provided according to the present invention. The developed image is formed of a development material having a mixture of carrier fluid and pigmented polymeric particles, the composition of such mixture being selected for its characteristic behavior at an elevated temperature for transitioning to a substantially single phase. The method includes the steps of developing an image onto an image bearer using the aforementioned development material; concentrating the developed image; heating the developed image to a temperature at which the polymeric particles and the carrier fluid achieve a substantially single phase condition, so as to form a transferable image; and transferring the transferable image to a receiver substrate such as a paper sheet.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: August 10, 2004
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Chu-heng Liu, Henry R. Till
  • Publication number: 20040114963
    Abstract: Method and apparatus for transferring a developed image from an image bearing member to a receiver substrate in a Contact Electrostatic Printing (CEP) system may be provided according to the present invention. The developed image is formed of a development material having a mixture of carrier fluid and pigmented polymeric particles, the composition of such mixture being selected for its characteristic behavior at an elevated temperature for transitioning to a substantially single phase. The method includes the steps of developing an image onto an image bearer using the aforementioned development material; concentrating the developed image; heating the developed image to a temperature at which the polymeric particles and the carrier fluid achieve a substantially single phase condition, so as to form a transferable image; and transferring the transferable image to a receiver substrate such as a paper sheet.
    Type: Application
    Filed: December 17, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: David H. Pan, Chu-Heng Liu, Henry R. Till
  • Publication number: 20040114018
    Abstract: An imaging surface field reconditioning method and apparatus are provided for reconditioning, in the field, a marking material control pattern on an imaging surface of in an image producing machine.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: David H. Pan, Ralph A. Mosher, James E. Williams, Richard J. Blum
  • Publication number: 20040114009
    Abstract: A liquid ink imaging member having a top outer imaging surface is provided for receiving image forming ink droplets from a printhead. The liquid ink imaging member includes (a) a substrate member; (b) at least one elastomeric layer formed over the substrate member and including the top outer imaging surface; and (c) a surface texture formed into the top outer imaging surface and comprising asperities spaced apart at most from about one-half to about one pixel spot size for providing contact angle hysteresis to pin image forming ink droplets received thereon, thereby preventing ink droplet drawback, and resulting in quality images.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: David H. Pan, James E. Williams, T. Edwin Freeman, Edward B. Caruthers, James R. Larson, Frank J. Bonsignore, Antonio DeCrescentis
  • Publication number: 20040114015
    Abstract: A polyimide film substrate pre-heater assembly is provided for pre-heating substrates in an image producing machine and includes (a) plural rollers including a drive roller; (b) a substrate path defining and heating assembly for defining a portion of substrate path; and (c) a belt assembly including a polyimide film belt forming a loop. The loop forms a substrate transport nip against the substrate path defining and heating assembly. The polyimide film belt includes a polyimide film support layer, a puzzle cut seam having inter-fitting teeth and receptacle members, and a fluoroelastomeric overcoat layer for filling and strengthening the puzzle cut seam, thereby preventing the inter-fitting teeth and receptacle members thereof from popping up when the loop is driven over relatively small diameter rollers.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Ihor W. Tarnawskyj, Ralph A. Mosher, Laurence J. Lynd, David H. Pan, Eilleen R. Aviles
  • Publication number: 20040109055
    Abstract: An offset printing apparatus having a coated imaging member for use with phase-change inks, has a substrate, an optional intermediate layer, and thereover an outer coating with a nano-size filler having an average particle size of from about 1 to about 250 nanometers, and an optional heating member associated with the offset printing apparatus.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 10, 2004
    Applicant: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha
  • Publication number: 20040109057
    Abstract: A process for providing a layer on a marking member by dissolving a fluoroelastomer; adding and reacting a nano-size zinc oxide and a crosslinking agent, to form a resulting homogeneous fluoroelastomer dispersion, wherein the nano-size zinc oxide has a particle size of from about 1 to about 250 nanometers; and subsequently providing at least one layer of the homogeneous fluoroelastomer dispersion to the marking member.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 10, 2004
    Applicant: Xerox Corporation.
    Inventors: David H. Pan, Donald S. Stanton, Santokh S. Badesha