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An adhesive dispensing apparatus for applying continuous, parallel adhesive beads onto the center portion of a substrate and intermittent, parallel adhesive beads on the outer portions of a substrate, particularly the plastic backing sheet of a disposable diaper. The apparatus includes a slot nozzle

An adhesive dispensing apparatus for applying continuous, parallel adhesive beads onto the center portion of a substrate and intermittent, parallel adhesive beads on the outer portions of a substrate, particularly the plastic backing sheet of a disposable diaper. The apparatus includes a slot nozzle, divided into two center sections and two end sections, which is formed with flow passageways for each section having a coat hanger profile including a plurality of spaced, discharge orifices to form the parallel beads. A valving arrangement including solenoid-operated center dispensing valves for each center section of the nozzle, and solenoid-operated dispensing and recirculation valve pairs for each end section of the nozzle, controls the flow of adhesive to the nozzle. The center dispensing valves are continuously opened during an operating run to apply continuous adhesive beads on the center portion of the substrate, and the outer dispensing valves are opened and closed intermittently to form gaps on the substrate without adhesive where the leg holes of the diaper are cut. When the outer dispensing valves are closed, the recirculation valves are simultaneously opened to maintain constant adhesive flow to the center dispensing valves.

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Apparatus for applying hot melt adhesive upon a substrate, comprising: an applicator head; means for connecting a source of hot melt adhesive to said applicator head; a slot nozzle mounted to said applicator head for dispensing hot melt adhesive upon a substrate, said slot nozzle being formed with a

Apparatus for applying hot melt adhesive upon a substrate, comprising: an applicator head; means for connecting a source of hot melt adhesive to said applicator head; a slot nozzle mounted to said applicator head for dispensing hot melt adhesive upon a substrate, said slot nozzle being formed with at least one first section having a plurality of spaced, discharge orifices, and at least one second section having a plurality of spaced discharge orifices; said first and second sections of said slot nozzle each having at least one fluid flow passageway forming a pair of runners connected at one end to the source of hot melt adhesive and extending outwardly at an angle relative to one another, and a triangular-shaped slot interconnecting said runners with said discharge orifices; means for supplying hot melt adhesive continuously to said first section of said slot nozzle, the hot melt adhesive being dispensed upon the substrate in continuous, parallel beads from said discharge orifices of said first section of said slot nozzle; means for intermittently supplying hot melt adhesive to said second section of said slot nozzle, the hot melt adhesive being dispensed upon the substrate in non-continuous, parallel beads from said discharge orifices of said second section of said slot nozzle.