Patent ID: 7934465

Claim:
An adhesive applicator head for applying a wide band of liquid adhesive to a moving substrate, said adhesive applicator head comprising: (a) an upper block having (i) a first inlet port for liquid adhesive, (ii) an adhesive manifold in communication with the first inlet port for receiving and holding liquid adhesive under low pressure, (iii) at least one vertically disposed step drilled hole leading from the adhesive manifold to an underside of the upper block, (iv) an O-ring positioned in the step drilled hole, (v) a second inlet port for low pressure air, and (vi) a cavity in the underside of the upper block for receiving the low pressure air from the second inlet port; (b) a lower block secured to the upper block, said lower block having (i) a substantially flat upperside for covering the cavity in the underside of the upper block thereby forming an air manifold for holding the low pressure air received from the second inlet port in the upper block, (ii) a vertically disposed hole aligned with the vertically disposed step drilled hole in the upper block, (iii) two opposed pin holes extending along the length of the vertically disposed hole in the lower block for receiving the low pressurized air from the air manifold and directing the low pressurized air to flow along the air nozzle tip at a high velocity, and (iv) a nozzle tip cavity in an underside of the lower block; and (c) a nozzle with a nozzle tip mounted in the vertically disposed hole of the lower block with an upper end of the nozzle extending into the step drilled hole in the upper block and a lower end of the nozzle extending into the nozzle tip cavity for receiving the liquid adhesive from the adhesive manifold of the upper block and dispensing adhesive therefrom, whereby adhesive forced from the nozzle tip encounters the high velocity air flowing from an associated two pin holes to cause the adhesive to fall from the nozzle tip in a back-forth manner onto the moving substrate to form a wide band of adhesive on the substrate.