Patents Assigned to Charles D. Knapp
  • Method of cleaning type elements and print heads
    Patent number: 4933015
    Abstract: A small, simple device for cleaning type elements and print heads consisting of (1) a rigid, yet flexible, plastic backing, onto which is bonded (2) a soft absorbent material which has been wetted with (3) a solvent cleaning solution.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: June 12, 1990
    Assignee: Charles D. Knapp
    Inventor: Arthur C. White