Relief pressure valve for hot melt adhesive

Details Relief pressure valve for hot melt adhesive Relief pressure valve for hot melt adhesive

1977-04-01

1978-11-07

Cherry, Johnny D.

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

On-off only

239570, 239583, B05B 130

Patent

active

041241630

ABSTRACT:
A valve for hot melt adhesives is provided with a spring pressed piston urged open by adhesive pressure. A nozzle on the valve has an outlet channel of predetermined volume. Upon termination of fluid pressure the piston retracts through a volume less than the predetermined nozzle outlet channel volume to suck back a limited amount of adhesive to prevent dripping of adhesives.

REFERENCES:
patent: 2806740 (1957-09-01), Fredrickson et al.
patent: 2951647 (1960-09-01), Dreisin
patent: 3348520 (1967-10-01), Lockwood
patent: 3537653 (1970-11-01), Jones

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