Patents Represented by Attorney S. C. Cole
  • Patent number: 3952702
    Abstract: The charge image bearing surface of a web to be developed is partially wrapped around the periphery of a perforated rotatable drum-shaped development electrode. Liquid electrographic toner is forced through the perforated drum against the charge image bearing surface of the recording web for developing the electrostatic image thereon. The drum is rotated to provide a peripheral velocity substantially different than the velocity of the web being developed such as to produce a sliding action between the periphery of the drum and the web. In this manner, the relatively stationary boundary layer of depleted liquid toner carried by the web is disturbed such that the pigment particle depleted layer of toner is replenished by toner forced through the perforated development electrode.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: April 27, 1976
    Assignee: Varian Associates
    Inventor: Raymond L. Levy