Patents by Inventor Samuel W. Ing

Samuel W. Ing 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).

  • Method and apparatus for reducing residual toner voltage
    Patent number: 5581330
    Abstract: In a multi-color imaging apparatus utilizing a recharge step between two image creation steps for conditioning a charge retentive surface pursuant to forming the second of the two images, a voltage sensitive corona generating device having a high characteristic slope described in a graph of the current delivered to a charge receiving surface (I) vs. grid minus charge receiving surface voltage (V) is used to both reduce the residual toner voltage across the previously toned image, and to charge the toned and untoned areas of the charge retentive surface to a substantially uniform level so that developability conditions for the subsequent image are improved.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: December 3, 1996
    Assignee: Xerox Corporation
    Inventors: Kenneth W. Pietrowski, Samuel W. Ing, Roger L. Bullock, Thomas Fleck, Charles H. Tabb, Zhao-Zhi Yu, Jeffrey J. Folkins, Daniel M. Bray, Cyril G. Edmunds
  • Electrode wire contamination prevention and detection
    Patent number: 5134442
    Abstract: An apparatus in which a developer unit of an electrophotographic printing machine has a plurality of wires which trap contaminants before reaching electrode wires positioned between a donor roller and a photoconductive surface. In addition, a circuit determines when defects and deletions are caused by contaminants spacing the electrode wires from the donor roller.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: July 28, 1992
    Assignee: Xerox Corporation
    Inventors: Jeffrey J. Folkins, Samuel W. Ing
  • Graded bandgap xerographic plate
    Patent number: 4088485
    Abstract: A xerographic plate and photoreceptor having improved speed and image resolution capability comprising a charge generating photoconductor layer, a trapping layer and a profile layer interposed between the trapping and charge generating layers; a suitable profile layer being obtained for xerographic purposes by utilizing materials from the charge generating and trapping layers having different band gaps but applied so as to obtain a gradation or gradient rather than a sharp interface.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: May 9, 1978
    Assignee: Xerox Corporation
    Inventors: Samuel W. Ing, Fred W. Schmidlin
  • Coater hardware and method for obtaining uniform photoconductive layers on a xerographic photoreceptor
    Patent number: 4023523
    Abstract: A method and device for obtaining uniform vapor deposition of one or more inorganic metallic photoconductive materials onto a substrate by importing under vacuum a slow translational movement of one or more heated crucibles and/or of the substrate being coated.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: May 17, 1977
    Assignee: Xerox Corporation
    Inventor: Samuel W. Ing
  • Coater hardware and method for obtaining uniform photoconductive layers on a xerographic photoreceptor
    Patent number: 4016310
    Abstract: A method and device for obtaining uniform vapor deposition of one or more inorganic metallic photoconductive materials onto a substrate by importing under vacuum a slow translational movement of one or more heated crucibles and/or of the substrate being coated.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: April 5, 1977
    Assignee: Xerox Corporation
    Inventor: Samuel W. Ing