The present invention pertains to an equipment adapted to uniformly spread anti-sticking powders, such as talc in an aqueous suspension, on bituminous membranes for water-repellent coverings in the building field. Said equipment comprises a series of rollers on which the membrane runs. During the feed...http://www.google.de/patents/US4630565?utm_source=gb-gplus-sharePatent US4630565 - Equipment for uniformly spreading anti-sticking powders on bituminous membranes for building coverings
