Patent ID: 8453880

Claim:
A process air-assisted hot melt adhesive liquid dispensing system for dispensing heated hot melt adhesive streams onto a substrate moving relative to the streams, the dispensing system comprising: a heated hot melt adhesive liquid manifold capable of supplying the heated hot melt adhesive liquid; a first dispensing module connected to said heated hot melt adhesive liquid manifold and configured to receive the heated hot melt adhesive liquid from the heated hot melt adhesive liquid manifold and to dispense the heated hot melt adhesive liquid as a stream onto the substrate moving relative to the stream, said first dispensing module further configured to receive heated process air and to dispense the heated process air to impart a motion to the dispensed heated hot melt adhesive stream; a second dispensing module connected to said heated hot melt adhesive liquid manifold and positioned in a side-by-side relationship with said first dispensing module across the width of the dispensing system, said second dispensing module configured to receive the heated hot melt adhesive liquid and to dispense the heated hot melt adhesive liquid as a stream onto the substrate moving relative to the stream, said second dispensing module further configured to receive the heated process air and to dispense the heated process air to impart a motion to the dispensed heated hot melt adhesive stream; and an adjustable control operative to change a pressure or a flow rate of the heated process air dispensed by said first dispensing module independently of a pressure or a flow rate of the heated process air dispensed by said second dispensing module so that the pressure or the flow rate of the heated process air dispensed by said first dispensing module is different than the pressure or the flow rate of the heated process air dispensed by said second dispensing module.