Patents by Inventor Charles H. Espersen

Charles H. Espersen 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).

  • Sheet feeding mechanism for duplicating machine with duplexing capability
    Patent number: 4526364
    Abstract: A sheet material feeding mechanism for use in a duplex duplicating machine. A pressure roller extends laterally across a sheet path for engaging the blank side of a previously imaged copy sheet. A feed roller assembly forms a nip with the pressure roller through which the sheet is fed. The feed roller assembly includes a pair of feed rollers mounted on the outside of a pair of support members for positioning the feed rollers near the marginal edges of the sheet to preclude tracking the imaged side of the sheet. The feed rollers are axially adjustable for accommodating different sheet sizes.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: July 2, 1985
    Assignee: AM International, Inc.
    Inventors: Robert H. Evans, Charles H. Espersen, John W. Tsai