Abstract: A method of treating asphaltic membrane covered roofs for inhibiting the formation of blisters therein and reducing blisters that have formed therein comprises applying to the blistered portions and surrounding areas of the membrane a quantity of selected liquid hydrocarbon. The selected hydrocarbon is miscible with the asphalt of the membrane to instill self-healing qualities therein.

Abstract: An apparatus and method for reducing molten thermoplastic material to substantially uniform shaped particles for storage, further handling, and use includes an elongated inclined liquid channel or flume for flow of a stream of cooling liquid and a material supply device operative to continuously direct a plurality of laterally spaced thin strips or ribbons of molten thermoplastic material into the stream of cooling liquid to be partially cooled thereby and a drum having a plurality of blade members for forming longitudinally spaced areas of reduced thickness in each of the strips or ribbons of material whereby the strips or ribbons of material break at the reduced thickness areas immediately or upon same becoming brittle by further cooling to a point that the particles are non-fusing with the strips or ribbons of thermoplastic material being supported during engagement thereof by the blade members.