Patent ID: 6662867
Filing Date: 2003-12-16
Classification: F28D,G05D

Abstract:
A method to control the heating of a filler for a filled asphalt coating for use in a roof covering, in order to control the viscosity of the filled asphalt coating, the method comprising:flowing the filler through a heater in a continuous heating process, and heating the filler in the heater using a heat exchange medium; monitoring the continuous heating process to detect a slowdown or stoppage thereof; in response to the slowdown or stoppage, cooling the heat exchange medium using a cooling device to control the temperature of the filler by maintaining the temperature below a predetermined level; mixing the heated filler with asphalt to produce the filled asphalt coating, wherein the controlling of the temperature of the filler results in controlling the viscosity of the filled asphalt coating by maintaining the viscosity within a predetermined range; and applying the filled asphalt coating to a substrate to produce the roof covering.