Patent ID: 8333582

Claim:
A machine for sealing cut edges of a foam board, the foam board having a top surface, a bottom surface, the cut edges comprising a first longitudinal cut edge extending between the top surface and the bottom surface and a second longitudinal cut edge extending between the top surface and the bottom surface, the machine comprising: a first pair of spaced apart rollers, such that a foam board having a known width may pass between the first pair of rollers and the rollers are spaced apart from one another a distance that is less than the width of the foam board, and each roller capable of rotating at a speed so that the foam board will pass between the first pair of rollers at a speed of at least 60 ft/min, the first pair of rollers heated to a temperature sufficient to soften the cut edges of the foam board; and a second pair of spaced apart rollers aligned with the first pair of spaced apart rollers, the rollers in the second pair of rollers being spaced apart a distance such that the rollers will engage the first and second cut edges of the foam board as the foam board passes between the second pair of rollers, the second pair of rollers each having a temperature that is lower than the temperature of the first pair of rollers.