Patent ID: 7623772

Claim:
A method of dispensing a hot melt adhesive material that can be heated from a lower temperature flowable non-molten liquid state to a higher temperature molten liquid state, the method comprising: pumping the hot melt adhesive material in the lower temperature flowable non-molten liquid state through a supply conduit to a heat exchanger assembly comprising a heating element; heating the hot melt adhesive material in the heat exchanger assembly to the higher temperature molten liquid state using the heating element; dissipating heat from the heating element in the heat exchanger assembly, without directing cooling compressed air at the supply conduit, to prevent heating the hot melt adhesive material in the supply conduit above the lower temperature flowable non-molten liquid state; and dispensing the hot melt adhesive material in the higher temperature molten liquid state from a dispensing gun in fluid communication with the heat exchanger assembly.