Patents by Inventor Nathaniel Howard Lieb

Nathaniel Howard Lieb 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: 5855931
    Abstract: A vacuum forming apparatus to allow a tray containing a sheet, to be molded into a prescribed shape, to be moved manually in a very rapid manner in a rearward diagonal upward direction from a horizontally positioned vacuum table that is at one level into horizontal engagement with a heating element that is at a higher level, When in this latter position the tray is retained by a magnet until the sheet is heated to a moldable condition. The tray is then manually withdrawn from the magnet without harm to an operator's fingers while the tray is being moved rapidly in a forward diagonal downward direction away from the heating element into engagement with the vacuum tables In this position the moldable sheet is formed into the prescribed molded shape. To accomplish this very rapid diagonal movement of the tray parallel linkages are employed that are each pivotally connected to the rear central portion of the tray at one end and to a post at its other end.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: January 5, 1999
    Inventors: Nathaniel Howard Lieb, Joseph Alexander Lieb
  • Patent number: D385630
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: October 28, 1997
    Inventors: Nathaniel Howard Lieb, Joseph Alexander Lieb