Patents by Inventor Allison Holland Caudill

Allison Holland Caudill 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).

  • Grooved magnetic brush roll
    Patent number: 4018187
    Abstract: For use in an electrophotographic copy machine utilizing magnetic brush roll development, an improved hollow magnetic roll made of non-magnetic material containing axially located grooves along the exterior periphery. The grooves are spaced in a range from 15-25 times the diameter of the permeable carrier beads used in the development process and the lands between grooves are polished to a high degree, e.g., 25 .mu. inches. The depth of the grooves is to a minimum of 1-2 times bead diameter while the groove width is to a minimum of 2-3 times bead diameter.
    Type: Grant
    Filed: June 30, 1976
    Date of Patent: April 19, 1977
    Assignee: International Business Machines Corporation
    Inventors: Jerry Joe Abbott, Allison Holland Caudill