Patents by Inventor Jack L. Crawford

Jack L. Crawford 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).

  • Boldness control in an electrophotographic machine
    Patent number: 5128698
    Abstract: Control over the placement of image edge location on the photoconductor of an electrophotographic machine providing for a range of discharge levels for edge picture elements (PELS) which vary from greater than, to less than, that level used for fully discharged PELS. Such control is achieved independently of machine parameter control by altering edge PEL illumination intensity in accordance with data representing desired edge PEL intensity as the photoconductor sensitivity changes. A system for measuring and controlling the fully discharged PEL level establishes a measurre of photoconductor sensitivity and is used for enabling the selection of current edge PEL intensity.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: July 7, 1992
    Assignee: International Business Machines Corporation
    Inventors: Jack L. Crawford, Joseph E. Cunningham, Jr.