Patents by Inventor Paul A. Verkinderen

Paul A. Verkinderen 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).

  • Apparatus for corona free pinning of extruded polymer film
    Patent number: 4310294
    Abstract: Apparatus for improving the adhesion or pinning of an extruded polymer film to a moving quenching member, by maintaining in the absence of corona discharge, the quenching member at an electrical potential differing from the potential of the extrusion die, the magnitude of said potential being sufficient to increase the adherence of the film to the quenching member.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: January 12, 1982
    Assignee: AGFA-Gevaert N.V.
    Inventors: Wilfried F. De Geest, Paul A. Verkinderen, Felix F. De Smedt
  • Method for the continuous coating of webs having spliced joints
    Patent number: 4269647
    Abstract: Defects in the coating of webs with aqueous solutions of hydrophilic colloids traceable to the effects of web splices are reduced. The webs are butt-joined by a splicing tape applied to their back side and are provided with a hydrophobic coating over their front side at the splicing region. The invention is particularly advantageous in the manufacture of photographic material.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: May 26, 1981
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Paul A. Verkinderen, Ludovicus H. Verhoeven, Lucien A. Christiaen, Camille F. Pira, Michel L. Marckx
  • Corona free pinning of extruded polymer film
    Patent number: 4166089
    Abstract: The adhesion or pinning of an extruded film forming polymer to a moving quenching member is improved, in the absence of corona discharge, by maintaining the quenching member at an electrical potential while the extrusion die is grounded, one magnitude of said potential being sufficient to increase the adherence of the film to the quenching member.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: August 28, 1979
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Wilfried F. De Geest, Paul A. Verkinderen, Felix F. De Smedt