Patent ID: 7090726

Claim:
An extruder feed supply system for supplying adhesives to an extruder receiving articles on a conveyor to be sealed, said extruder feed supply system comprising: at least one air motor driven pump, each said pump being connected to an extruder and a source of adhesives so as to pump said adhesives from said adhesive source to said extruder and said air motor driven pump being connected to a source of compressed air; a solenoid valve connected between said compressed air source and said air motor driven pump, said solenoid valve actuable between a normally open position whereby the air from said air motor driven pump is dumped to atmosphere and a closed position connecting said air source and said air motor driven pump; and first and second position detectors, said first position detector being connected so as to actuate said solenoid valve into said closed position and said second position detector being positioned so as to enable operation of said extruder to apply material to one of said articles, said first position detector being positioned sufficient upstream of said second position detector on said conveyor to enable said air motor driven pump to be pressurized to a level substantially equal to the dynamic pressure of said system.