Patents by Inventor Willem Koudstaal

Willem Koudstaal 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: 4806021
    Abstract: A container for a drink comprised of a bag of flexible plastic material for drink compacting sheets (1,2) welded upon each other by means of spaced longitudinal and transverse seams (3,4,5 and 6) which bag by means of a strip (7) or sheet (23) has been provided with a space for the insertion of a straw (13) such that the welding seams of said strip (7) or sheet (23) are either at a distance from the seams of the bag or coincide with said seams, an opening being provided for the insertion of the straw. The straw is movable within the space for puncturing the inside wall of the space which is elastically deformable and elastically surrounds the outer perimeter of the straw after it has punctured the wall. The straw may be removed if the contents of the bag are only partially consumed, thereby forming a seal by the punctured wall pushing against the outside wall of the space under pressure from the contents therein.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: February 21, 1989
    Assignee: Koninklijke Emballage Industrie Van Leer B.V.
    Inventors: Willem Koudstaal, Alan Thomas, Jeffrey L. Lewis
  • Patent number: 4556349
    Abstract: A partition for a cargo carrier (1) for bulk freight. The cargo carrier is provided with an unloading opening (3) closable by a door (4') or board at the location of a partition to be positioned at the inner side thereof. The partition includes a number of profiles (8) to be positioned horizontally across the unloading opening (3) in superposed relation into two supports (4). The supports (4) are provided at the location of the walls of the cargo carrier and extend perpendicular to the plane of the unloading opening (3). Each of the supports (4) includes a plate (4) the height of which corresponds substantially with the height of the partition. The plate (4) is placed against the inner wall of the cargo carrier and has parallel to the plane of the wall of the cargo carrier a dimension such that the bulk freight urges the plate (4) against said wall by a sufficient force as to hold the plate (4) by friction.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: December 3, 1985
    Assignee: Koninklijke Emballage Industrie Van Leer B.V.
    Inventors: Willem Koudstaal, Willem L. Streefkerk
  • Patent number: 4470749
    Abstract: A method for unloading bulk freight from a cargo body or container 3 or other storage space provided internally with a foil 4. The bulk freight is unloaded through an under edge of the bottom 10 of the cargo body or container 3. Before filling, a continuous foil web 4 is provided at least over the bottom 10 and a portion of the front wall opposite of the unloading edge or side wall. The foil web 4 is laid down over the bottom in a sequence of folds 5. The foil 4 is pulled outwards over the unloading edge for unloading the cargo.
    Type: Grant
    Filed: June 8, 1982
    Date of Patent: September 11, 1984
    Assignee: Koninklijke Emballage Industrie Van Leer B.V.
    Inventor: Willem Koudstaal
  • Patent number: 4400910
    Abstract: The invention relates to a method for protecting plants during transportation by packaging plant (2) and its pot (1) in a bag (3) which at least partly consists of microporous material (6) having preferably an air-permeability of 0.1-300 mm.sup.3 air per second per Pascal per m.sup.2 of the film material with pore diameters of less than 0.5 .mu.m due to which the bag (3) is self-inflatable, exchange of gases still takes place and the climate within the bag (3) is kept constant.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: August 30, 1983
    Assignee: Koninklijke Emballage Industrie Van Leer B.V.
    Inventors: Willem Koudstaal, William J. Organ