Patents Assigned to B.V. Asphalt-en Chemise Fabrieken Smid & Hollander
  • Apparatus for making perforated roofing material
    Patent number: 4819848
    Abstract: A perforated web-like bituminous roofing material comprising a perforated, bituminized carrier, at the side facing, in the condition of use, the roof area to be coated, is provided with a metal foil leaving clear the perforations in the bituminized carrier. The roofing material can be manufactured by finishing one side of a perforated bituminized carrier with fine sprinkling material and coating the other side with an imperforate metal foil, and subsequently removing the metal foil at the perforations.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: April 11, 1989
    Assignee: B.V. Asphalt-en Chemise Fabrieken Smid & Hollander
    Inventor: Jan Hollander