Patent ID: 7221859

Claim:
A multi-function heat exchanger comprising: a heat exchanger assembly having a front end that is hydraulically connectable to an inlet port of a dispensing gun; and a heat dissipating assembly that is connected to a rear end of the heat exchanger assembly and is connectable to an outlet end of a supply hose through which a hot melt adhesive material having a lower temperature flowable liquid state and a higher temperature molten liquid state can be supplied under sufficient hydraulic pressure to move the material through the heat dissipating assembly and the heat exchanger assembly into the dispensing gun when the gun is operated, wherein the heat exchanger assembly comprises a heat source that provides sufficient heat to cause the material to be in the higher temperature molten liquid state as it passes from the heat exchanger assembly to the dispensing gun, and wherein the heat dissipating assembly prevents heat from the heat exchanger assembly from migrating back into the supply hose and thereby maintains the material in the supply hose in the lower temperature flowable liquid state.