Patents by Inventor Donald J. Stefanich, Jr.

Donald J. Stefanich, Jr. 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).

  • Feed rollers with reversing clutch
    Patent number: 6305684
    Abstract: The invention is a sheet feeder for engaging and removing a sheet of paper or other material from a stack and feeding it along a path. The sheet feeder can include a sheet separator designed for advancing the engaged sheet while retarding any adjacent sheets. The separator has a driven advancing roller nipped with a driven retarding roller coupled to its drive by a friction clutch. The clutch normally slips and permits the retarding roller to be driven forward by the advancing roller when one or no sheets are engaged between the advancing and retarding rollers. The clutch engages and drives the retarding roller backward so long as a multifeed of two or more sheets is engaged between the advancing and retarding rollers.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: October 23, 2001
    Inventors: Werner R. Lightner, Donald J. Stefanich, Jr., Jim T. Russo, Jose S. Pioquinto, Paul E. Brodzik