Patents by Inventor Rijk van de Haar

Rijk van de Haar 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: 4653252
    Abstract: A method of manufacturing a combination of a case accommodating a flexible ynthetic plastics container or bag having a pouring opening and filled at least partly with liquid. The starting point for forming the case is a blank having such folding lines and cuts that when the blank is folded about the synthetic plastics bag, the latter is automatically fixed in the case being formed. The blank has two rectangular portions, one so-called base portion and a top face portion, which portions are interconnected by a second end face panel. The two edges of the base portion opposite the second end face panel and the top face portion connect with a first end face panel and a third end face panel, respectively. The opposed free edges of the base portion and the top face portion connect with side panels, and at least a part of the end face panels is provided with flaps. The various portions are interconnected by means of folding lines.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: March 31, 1987
    Assignee: Douwe Egberts Koninklijke Tabaksfabriek Koffiebranderijen-Theehandel N.V.
    Inventors: Rijk van de Haar, Johan H. C. Thomassen
  • Patent number: 4383537
    Abstract: A system for analyzing and cutting tobacco leaves for cigar wrappers in wh each leaf is conveyed to a scanner which scans discrete areas in parallel lines to produce sequences of digital signals, each sequence representing a line and each signal indicating the presence or absence of a hole. The signals of each line, after a delay, are superimposed and the composite signal checked to ascertain if one or more hole free parallelograms of at least one given size can be cut from the leaf. After scanning the leaf is conveyed to another location and cut.
    Type: Grant
    Filed: August 18, 1978
    Date of Patent: May 17, 1983
    Assignee: Douwe Egberts Koninklijke Tabaksfabriek-Koffiebranderijen-Theehandel B.V.
    Inventors: Rijk van de Haar, Brian M. Hopkins, Jan C. van Hattem