Patents by Inventor Paul J. Bradmon

Paul J. Bradmon 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).

  • Automatic alignment of optical elements in an electrophotographic apparatus
    Patent number: 4272187
    Abstract: The optical elements of a copier are automatically aligned by positioning the elements under the control of signals from an image-dissecting scanner. The scanner, mounted to receive the image normally presented to the photoconductor, examines a master document placed in the position normally occupied by a document to be copied. Optical adjustments are made as a function of the examination of lines on the master document by the scanner. The contrast between a line and its background is maximum when optical elements between the master document and the scanner provide the sharpest focus of the line image to the scanner. Signals from the scanner for a plurality of lines on the master document determine optimum positioning of the optical elements. The scanner determines the apparent spacing between lines, which are a known distance apart on the master document, to position the optical elements for a desired magnification.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: June 9, 1981
    Assignee: International Business Machines Corporation
    Inventors: Ivan P. Birdsall, Paul J. Bradmon, Donald L. Buddington, Vincent H. Garcia, Don S. Nelson
  • Apparatus and method for controlling the adjustment of optical elements in an electrophotographic apparatus
    Patent number: 4268165
    Abstract: The optical elements of a copier are automatically aligned by positioning the elements under the control of signals from an image-dissecting scanner. The scanner, mounted to receive the image normally presented to the photoconductor, examines a master document placed in the position normally occupied by a document to be copied. Optical adjustments are made as a function of the examination of lines on the master document by the scanner. The contrast between a line and its background is maximum when optical elements between the master document and the scanner provide the sharpest focus of the line image to the scanner. Signals from the scanner for a plurality of lines on the master document determine optimum positioning of the optical elements. The scanner determines the apparent spacing between lines, which are a known distance apart on the master document, to position the optical elements for a desired magnification.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: May 19, 1981
    Assignee: International Business Machines Corporation
    Inventor: Paul J. Bradmon