Patents Assigned to "Gechem"
  • Method for forming a gellified polyurethane layer on a surface
    Patent number: 5071683
    Abstract: Method and device for forming a gellified polyrethane layer on a surface, notably of a mould, by spraying a liquid reaction mixture comprising polyol and isocyanates and which has a viscosity between 20 and 2000 centipoises. The mixture is sprayed in the form of a film of liquid and/or raindrops of which the main part has a mean diameter (Medium Volume Diameter; "M.V.D.") which, according to the standards ASTM E 779-81, is larger than 100 microns and preferably larger than 500 microns.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: December 10, 1991
    Assignee: Gechem and Recticel
    Inventors: Jacques Verwilst, Hugo De Winter, Andre Braeckman, Bernard De Baes
  • Method for preparing a shaped layer by gun spraying
    Patent number: 4822549
    Abstract: Method for preparing a shaped part, from a flexible plastic material, from a particular pattern, which comprises first forming by gun-spraying, a layer (6) plastic material over a shaping surface from a first mould (11) corresponding to an outline distorted along continuous lines, of the visible surface impression (12) of said pattern, and then stripping the layer of plastic material from the mould, laying said layer (6) inside a second mould the shaping surface of which coincides with the shape of the pattern visible surface.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: April 18, 1989
    Assignee: "Gechem"
    Inventors: Jacques Verwilst, Lucien Jourquin