Patents by Inventor Colleen Helbig

Colleen Helbig 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: 7267917
    Abstract: A charge transport layer composition for a photoreceptor includes at least a binder, at least one arylamine charge transport material, e.g., N,N?-diphenyl-N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and at least one polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups. The charge transport layer forms a layer of photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: September 11, 2007
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Kenny-Tuan T. Dinh, Markus R. Silvestri, Michael E. Zak, John F. Yanus, Min-Hong Fu, David M. Skinner, Kathleen M. Carmichael, Colleen A. Helbig, Dale S. Renfer, John A. Bergfjord, Sr., Susan M. Van Dusen, Anthony M. Horgan, Jin Wu, Steven M. Sterling
  • Patent number: 7192678
    Abstract: A charge transport layer composition for a photoreceptor includes at least a binder and a charge transport material of about 100% to about 40% by weight of a total of the charge transport layer N,N-dimethylphenyl)-4-biphenylamine and about 0% to about 60% N,N?-dephenyl-N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and wherein the total charge transport material in the composition is 48% or less of the total solids of the composition. The charge transport layer forms a layer of a photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: March 20, 2007
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Kenny-Tuan T. Dinh, Markus R. Silvestri, Michael E. Zak, John F. Yanus, Min-Hong Fu, David M. Skinner, Kathleen M. Carmichael, Colleen A. Helbig, Dale S. Renfer, John A. Bergfjord, Sr., Susan M. Van Dusen
  • Patent number: 7052813
    Abstract: A charge transport layer for an imaging member comprising a first and second charge transport layer wherein the second charge transport layer comprises a charge transport component, a hindered phenol covalently bonded to a polymer, and an additional polymer binder other than the polymer containing the hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: May 30, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Patent number: 7022445
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: April 4, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Patent number: 7018756
    Abstract: A photoconductive imaging member is disclosed comprising a charge generation layer and a charge transport layer comprising an oxidative inhibitor. An electrophotographic imaging process using the imaging member of the invention is also described.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: March 28, 2006
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, Kent J. Evans, Kathleen M. Carmichael, Colleen A. Helbig, John F. Yanus, Yuhua Tong, Timothy J. Fuller, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch
  • Publication number: 20060063080
    Abstract: A charge transport layer composition for a photoreceptor includes at least a binder, at least one arylamine charge transport material, e.g., N,N?-diphenyl-N,N?-bis(3-methylphenyl)-(2,2?-biphenyl)-4,4?-diamine, and at least one polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups. The charge transport layer forms a layer of photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.
    Type: Application
    Filed: September 21, 2004
    Publication date: March 23, 2006
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Kenny-Tuan Dinh, Markus Silvestri, Michael Zak, John Yanus, Min-Hong Fu, David Skinner, Kathleen Carmichael, Colleen Helbig, Dale Renfer, John Bergfjord, Susan Van Dusen, Anthony Horgan, Jin Wu, Steven Sterling
  • Publication number: 20060024445
    Abstract: A coating application system includes a coating applicator having an outlet through which a stream of a liquid coating is delivered, a substrate which receives the stream of liquid coating, and a vacuum system which applies a vacuum to the liquid coating.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 2, 2006
    Inventors: Alfred Willnow, Kent Evans, Colleen Helbig, Kathleen Carmichael, June Schneider, David Skinner, Min-Hong Fu, Walter Lerminiaux, Mark Muscato, Kenneth Strong, David DeHollander, Kirk Michaels
  • Publication number: 20060014089
    Abstract: A charge transport layer composition for a photoreceptor includes at least a binder and a charge transport material of about 100% to about 40% by weight of a total of the charge transport layer N,N-dimethylphenyl)-4-biphenylamine and about 0% to about 60% N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and wherein the total charge transport material in the composition is 48% or less of the total solids of the composition. The charge transport layer forms a layer of a photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.
    Type: Application
    Filed: July 13, 2004
    Publication date: January 19, 2006
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Kenny-Tuan Dinh, Markus Silvestri, Michael Zak, John Yanus, Min-Hong Fu, David Skinner, Kathleen Carmichael, Colleen Helbig, Dale Renfer, John Bergfjord, Susan Van Dusen
  • Publication number: 20050271958
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Application
    Filed: August 4, 2005
    Publication date: December 8, 2005
    Inventors: Yuhua Tong, Timothy Fuller, Colleen Helbig, Kent Evans, John Yanus, Karen Garland, Paul DeFeo, Anita Lynch, Kathleen Carmichael, Damodar Pai, Dale Renfer, Markus Silvestri
  • Patent number: 6933089
    Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: August 23, 2005
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C. U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
  • Publication number: 20050053854
    Abstract: A photoconductive imaging member is disclosed comprising a charge generation layer and a charge transport layer comprising an oxidative inhibitor. An electrophotographic imaging process using the imaging member of the invention is also described.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 10, 2005
    Inventors: Damodar Pai, Kent Evans, Kathleen Carmichael, Colleen Helbig, John Yanus, Yuhua Tong, Timothy Fuller, Karen Garland, Paul DeFeo, Anita Lynch
  • Patent number: 6780554
    Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: August 24, 2004
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
  • Publication number: 20040115544
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer comprises the application of charge transport molecules and a poly(fluoroacrylate)-graft-poly(methyl methacrylate) surfactant. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, excellent print quality and decreased crystallization of the charge transport component.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Min-Hong Fu, Colleen A. Helbig, Kent J. Evans, Kathleen M. Carmichael, David M. Skinner
  • Publication number: 20040115547
    Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
  • Publication number: 20040115545
    Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
  • Publication number: 20040115546
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Patent number: 6645686
    Abstract: An electrophotographic imaging member comprises a substrate, a charge generating layer, and a charge transport layer. The charge transport layer comprises a binder and charge transport molecules, wherein the binder eliminates or minimizes crystallization of the charge transport molecules. Optionally, an electrophotographic imaging member comprises a substrate and a single charge generating and charge transport layer. The single charge generating and charge transport layer comprises a binder, charge generating molecules and charge transport molecules, wherein the binder eliminates or minimizes crystallization of the charge transport molecules. Specific binders are PCZ-800, a PCZ-500, or a PCZ-400 polycarbonate resin.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: November 11, 2003
    Assignee: Xerox Corporation
    Inventors: Min-Hong Fu, Colleen A. Helbig, Kent J. Evans, Kathleen M. Carmichael, June E. Schneider, David M. Skinner, Alfred H. Willnow
  • Patent number: 5686215
    Abstract: An electrophotographic imaging member including an electrophotographic imaging member having an imaging surface adapted to accept a negative electrical charge, the electrophotographic imaging member including a substrate, a siloxane hole blocking layer, an adhesive layer including a uniform blend of polyarylate film forming resin and a polyester film forming resin, a charge generation layer including hydroxygallium phthalocyanine particles dispersed in a film forming resin, and a hole transport layer, the hole transport layer being substantially non-absorbing in the spectral region at which the charge generation layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from the charge generation layer and transporting the holes through the charge transport layer.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: November 11, 1997
    Assignee: Xerox Corporation
    Inventors: John A. Bergfjord, Sr., Joseph S. Cappiello, Kathleen M. Carmichael, Vincent J. Cilento, Colleen A. Helbig, Neil S. Patterson, Michael S. Roetker, Joellen Simone