Patent ID: 9119230
Filing Date: 2015-08-25
Classification: B67D,H05B

Abstract:
1. A hot melt dispensing system comprising: a melter capable of heating hot melt pellets to produce a hot melt liquid; a dispensing system for administering the hot melt liquid; a plurality of heaters associated with different zones of the melter and the dispensing system; and a controller that distributes AC electric power among the plurality of heaters on a time sharing basis, based on a total current target, a temperature set point, current draw of each of the heaters, sensed current, and stored priority criteria, and wherein the controller receives current sense signals indicating each zero crossing of the AC electric power and determines distribution of AC electric power for each next half cycle by selecting which heaters will receive power during that next half cycle (a) to maintain an RMS total current draw over time at or below the total current target and (b) to limit the total current draw during that next half cycle to less than a circuit breaker current limit.