Patents by Inventor Petrus W. Van Der Zon

Petrus W. Van Der Zon 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: 5632132
    Abstract: Packets containing a flowable material are provided with a draw-string or thread to squeeze the packet contents. The packet envelope is formed from a doubled-over web which gives the packet a folded-over edge and which encloses an intermediate portion of the thread close to the folded-over edge. The end portions of the web extend from the intermediate portion of the thread to extend through the opposite edge of the packet. The external ends of the thread are secured to a tag which is attached to the outer face of the envelope. The thread intermediate portion is retained close to said one edge by heat seal means. Apparatus is also described for producing the packets in a continuous or semi-continuous manner.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 27, 1997
    Assignee: Thomas J. Lipton Co., Division of Conopco, Inc.
    Inventors: Jan Kuipers, Simon C. Martin, Geoffrey W. Vernon, Petrus W. Van Der Zon
  • Patent number: 5366741
    Abstract: A dual compartment infusion packet has the compartments directly secured to each other at one end of the packet and separated by a V-fold of the packet material at the other end. A suspension thread has an intermediate portion lying within the fold and end portions extending therefrom through attachment means at the other end of the packet. The end portions are displaceable in the attachment means so that when tensioned they contract the packet to squeeze out liquid held in the packet after an infusion process.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: November 22, 1994
    Assignee: Thomas J. Lipton Co., Division of Conopco, Inc.
    Inventor: Petrus W. Van Der Zon
  • Patent number: 4631896
    Abstract: A method and apparatus for packaging irregularly shaped articles is provided in which one or more articles is supported on one or more supports, enclosing the supports and the articles in a pack and removing the supports through one or more openings in the pack.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: December 30, 1986
    Assignee: Internationale Octrooi Maatschaapij "Octropa" B.V.
    Inventor: Petrus W. Van Der Zon