Patents by Inventor Marcel Inkel

Marcel Inkel 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).

  • Patent number: 4572462
    Abstract: An apparatus for transferring material wound on a feed spool to a take-up spool such as in a ribbon cassette for a typewriter or word processor. The apparatus includes a base, a centerpost, a feed spool positioned to rotate about the centerpost, a take-up spool, and a generally circular coil spring attached at one end to the centerpost. The outer surface of the spring exerts a frictional drag force on the feed spool which resists rotation of the spool during a transfer procedure. The spring also deforms during the transfer procedure and exerts a force on the spool in a direction opposite to the direction of rotation thereby providing a minimum tension on the material to avoid problems common to conventional cassettes such as jamming.
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: February 25, 1986
    Assignee: Placo Molders Inc.
    Inventor: Marcel Inkel