Patents by Inventor Hans Nicolaas Schaaper

Hans Nicolaas Schaaper 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).

  • Body-necking a wall-ironed can
    Patent number: 6253597
    Abstract: Method for manufacturing a metal, body-necked can with an ironed wall, for example one intended for being provided on one open side with an easily opening lid in order thereby to form a beverage can, comprising the stages of reducing the diameter of the can with the ironed wall by necking the wall up a considerable part of the height of the can, to be referred to as body-necking, and applying a neck rim by necking the top rim of the can, whereby prior to being body-necked the can is first necked.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: July 3, 2001
    Assignee: Corus Staal B.V.
    Inventors: Auke Hogendoorn, Jacobus Frans Nak, Hans Nicolaas Schaaper