Patent ID: 7717059

Claim:
A liquid adhesive dispensing system for dispensing liquid adhesive onto a moving substrate comprising a header having at least one spray gun, a liquid adhesive supply, a pressurized air supply, said spray gun having a liquid inlet coupled to said liquid adhesive supply for receiving liquid adhesive from said liquid adhesive supply and a spray nozzle for dispensing liquid adhesive from said spray gun onto the moving substrate, said spray gun having an foaming/atomizing air inlet coupled to said pressurized air supply for receiving pressurized air and directing pressurized air to said nozzle, a selectively operable variable speed positive displacement pump coupled between said liquid adhesive supply and said spray gun for directing a metered quantity of liquid adhesive to said spray gun proportional to the rate of movement of the substrate, and said nozzle having a body formed with a liquid adhesive flow passage communicating with said liquid adhesive inlet, said nozzle having a nose portion extending from a downstream end of said nozzle body which defines a liquid adhesive discharge orifice, an air cap mounted in surrounding relation to said nozzle and having a central discharge orifice coaxially aligned with said nozzle nose portion and at least partially surrounding to said nozzle nose portion for defining a foaming/atomizing air passageway communicating with said pressurized air supply for directing pressurized air in surrounding relation to liquid adhesive discharging from said nose portion discharge orifice for atomizing the liquid adhesive into a foam of fine bubbles for dispensing into said moving substrate.