Abstract: A hot melt dispensing system includes a melter, a feed system, a dispenser and a filter. The feed system delivers hot melt pellets to the melter. The dispenser dispenses liquefied hot melt adhesive from the melter. The filter is connected to the feed system and prevents contaminants from passing through the feed system. In one embodiment, the filter comprises a screen filter positioned near a bottom of a pellet hopper. In another embodiment, the filter comprises a series of baffles positioned along the pellet hopper. In yet another embodiment, the filter comprises an electro-static filter coupled to a feed hose.

Abstract: A melter for a melt system includes a tank, a vibration generating device, and a heater. The tank has a wall for containing a hot melt adhesive, and the vibration generating device vibrates the wall. The heater transfers heat to the tank.

Abstract: A heating system includes an air motor with an exhaust; a pump for a hot melt dispensing system and driven by the air motor; and a shroud enclosing at least a portion of the air motor and the pump to direct heat from the pump to the exhaust of the air motor.

Abstract: Heating of hot melt adhesive in a hot melt dispensing system is provided by heaters distributed in a plurality of zones of the system. A controller receives input electric power and distributes that electric power to the heaters on a time sharing basis. The controller delivers power to the heaters as a function of the total current target, a temperature set point, the current draw of each of the heaters, and stored priority criteria such as heating priorities of the zones, a history of on and off periods for each heater, and distance from the temperature set point.

Abstract: A method includes delivering current in parallel to a first resistive heating element, a second resistive heating element and a third resistive heating element during a first operating mode of a hot melt dispensing system, and delivering current in parallel to the first resistive heating element, the second resistive heating element and third and fourth resistive heating elements during a second operating mode of a hot melt dispensing system where the third and fourth resistive heating elements are arranged in series.

Abstract: A pumping system comprises an internal combustion engine, a generator, a pumping unit and a heat recovery system. The generator is driven by the internal combustion engine. The pumping unit is powered by the generator. The heat recovery system thermally couples the internal combustion engine with the pumping unit.

Abstract: The hydraulic power module 10 consists of 1) a hydraulic manifold 12 to route hydraulic fluid to the correct areas, 2) a hydraulic reservoir 14 that contains hydraulic fluid 16,3) a hydraulic pump 18,4) a DC servo motor 20,5) a directional valve 22,6) a cooling system 24 7) an integrated filter housing 26 and 8) electronics—motor control 28 for controlling the DC servo motor 20.

Abstract: A control module 10 for an electric motor 34 is provided. Such motors 34, including DC brushless motors, are commonly used in many types of equipment including plural component proportioning equipment. The design includes four boards: a power conditioning module 12, a top board 14, a middle board 16 and a bottom board 18.

Abstract: The control method uses the following scheme: Control Value (CV)=Proportional Value (PV)+Derivative Value (DV)+Derivative Correction (DC), where PV goes from 0 to MAX and operates over a very narrow band—in a temperature control example plus or minus 1 degree C. from the setpoint and is used to stabilize CV and enforce the setpoint. DV goes from ?MAX to MAX and is exponentially decayed over a time constant to weigh the most recent values heavier than older values. This allows the control to see the real derivative despite a large step size which might otherwise mask it and within a small time window. DC goes from ?MAX to MAX and makes this scheme work for any situation. The desired derivative is defined based on the graph. This then adjusts to compensate when the slope is not following the ideal definition.