Patents by Inventor Greg McGuire

Greg McGuire 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).

  • Systems and methods for cleaning bias charge roll surface in printing systems
    Patent number: 8913917
    Abstract: A vibration-assisted bias charge roll cleaning system includes a bias charge roll cleaning member connected to an actuator for causing the cleaning member to vibrate. The actuator is controlled to vibrate according to a predetermined pattern, and at desired frequencies at particular modes. The cleaning member is configured to be movable to a contact-cleaning position and a cleaning member cleaning position at which the cleaning member is separate from the charge roll.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: December 16, 2014
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Nan-xing Hu, Vlad Skorokhod, Greg McGuire
  • Bias charge roller having a continuous raised pattern on the outer surface
    Patent number: 8849160
    Abstract: A bias charge roller includes an electrically conductive core. An outer layer is axially supported on the core. The outer layer is either conductive or semi-conductive. The bias charge roller further includes a continuous raised pattern on the outer surface of the outer layer. The continuous raised pattern is configured to contact a charge-retentive surface of an electrophotographic imaging member so as to charge the charge-retentive surface. The bias charge roller can be employed in an image forming apparatus.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: September 30, 2014
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Johann E. Junginger, Greg McGuire, Vlad Skorokhod, Sarah J. Vella
  • SYSTEMS AND METHODS FOR CLEANING BIAS CHARGE ROLL SURFACE IN PRINTING SYSTEMS
    Publication number: 20140205312
    Abstract: A vibration-assisted bias charge roll cleaning system includes a bias charge roll cleaning member connected to an actuator for causing the cleaning member to vibrate. The actuator is controlled to vibrate according to a predetermined pattern, and at desired frequencies at particular modes. The cleaning member is configured to be movable to a contact-cleaning position and a cleaning member cleaning position at which the cleaning member is separate from the charge roll.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 24, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yu LIU, Johann JUNGINGER, Sarah VELLA, Nan-xing HU, Vlad SKOROKHOD, Greg MCGUIRE
  • BIAS CHARGE ROLLER AND APPARATUS INCORPORATING THE BIAS CHARGE ROLLER
    Publication number: 20140037337
    Abstract: A bias charge roller includes an electrically conductive core. An outer layer is axially supported on the core. The outer layer is either conductive or semi-conductive. The bias charge roller further includes a continuous raised pattern on the outer surface of the outer layer. The continuous raised pattern is configured to contact a charge-retentive surface of an electrophotographic imaging member so as to charge the charge-retentive surface. The bias charge roller can be employed in an image forming apparatus.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 6, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yu Liu, Johann E. Junginger, Greg McGuire, Vlad Skorokhod, Sarah J. Vella
  • Robust photoreceptor surface layer
    Patent number: 8460844
    Abstract: A imaging member, such as a photoreceptor, comprising a structured organic film comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may comprise at least one secondary component, such as an antioxidant.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: June 11, 2013
    Assignee: Xerox Corporation
    Inventors: Matthew A. Heuft, Adrien P. Cote, Greg McGuire, Nan-Xing Hu, Yvan Gagnon
  • ROBUST PHOTORECEPTOR SURFACE LAYER
    Publication number: 20130078561
    Abstract: A imaging member, such as a photoreceptor, comprising a structured organic film comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may comprise at least one secondary component, such as an antioxidant.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: XEROX CORPORATION
    Inventors: Matthew A. HEUFT, Adrien P. CÔTÉ, Greg MCGUIRE, Nan-Xing HU, Yvan GAGNON
  • Charge Transport Layer Containing Symmetric Charge Transport Molecules and High Tg Resins for Imaging Device
    Publication number: 20120164568
    Abstract: A photoreceptor charge transport layer containing a film-forming material or binder with a higher Tg and a symmetric charge transport molecule is described.
    Type: Application
    Filed: December 27, 2010
    Publication date: June 28, 2012
    Applicant: XEROX CORPORATION
    Inventors: Greg McGuire, Jennifer A. Coggan
  • Imaging member
    Patent number: 7691551
    Abstract: A layer on the reverse side of an imaging member provides excellent crack resistance to the imaging layer(s) on the front side. The crack-deterring backing layer can be a laminated self-adhesive, such as tape, or a coating. Because the crack-deterring backing layer is on the reverse side, it does not affect the electrical properties of the imaging member. Overcoat layers may be used whose function is limited to improved scratch resistance.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: April 6, 2010
    Assignee: Xerox Corporation
    Inventors: Mohamed Ismail Abu-Abed, Johann E. Junginger, Hany Aziz, Greg McGuire
  • Phenolic hole transport polymers
    Patent number: 7538175
    Abstract: A polymer having hole transport functionality and antioxidant properties is disclosed. The polymer comprises a phenolic segment and a hole transport segment. The polymer is suitable for use in the charge transport layer of an imaging member. Processes for producing the polymer are also disclosed.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: May 26, 2009
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, Greg McGuire, Cuong Vong
  • IMAGING MEMBER
    Publication number: 20090004587
    Abstract: A layer on the reverse side of an imaging member provides excellent crack resistance to the imaging layer(s) on the front side. The crack-deterring backing layer can be a laminated self-adhesive, such as tape, or a coating. Because the crack-deterring backing layer is on the reverse side, it does not affect the electrical properties of the imaging member. Overcoat layers may be used whose function is limited to improved scratch resistance.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Inventors: Mohamed Ismail Abu-Abed, Johann E. Junginger, Hany Aziz, Greg McGuire
  • Imaging member
    Publication number: 20070092817
    Abstract: An imaging member having an overcoat layer formed from a high viscosity overcoat composition. The viscosity of the overcoat composition is sufficient for reducing or preventing the diffusion of charge transport molecules into the overcoat layer. For example, in one embodiment the magnitude of diffusion of charge transport molecules is controlled by the viscosity of the overcoat composition used to form the overcoat layer. Other embodiments are also disclosed.
    Type: Application
    Filed: October 25, 2005
    Publication date: April 26, 2007
    Inventors: Greg McGuire, John Graham, Zoran Popovic, Ah-Mee Hor, Stephan Drappel, Johann Junginger
  • Phenolic hole transport polymers
    Publication number: 20070087276
    Abstract: A polymer having hole transport functionality and antioxidant properties is disclosed. The polymer comprises a phenolic segment and a hole transport segment. The polymer is suitable for use in the charge transport layer of an imaging member. Processes for producing the polymer are also disclosed.
    Type: Application
    Filed: October 13, 2005
    Publication date: April 19, 2007
    Inventors: Yu Qi, Nan-Xing Hu, Greg McGuire, Cuong Vong