Adhesive gun having needle valve nozzle

Details Adhesive gun having needle valve nozzle Adhesive gun having needle valve nozzle

1978-11-08

1980-08-05

Skaggs, H. Grant

Dispensing

With heating or cooling means

Cooling only

222389, 222504, 222524, 251 636, 251353, B67D 562

Patent

active

042158028

ABSTRACT:
A needle valve nozzle is employed in a hot melt adhesive gun used to apply thermoplastic adhesive. Actuation of a trigger mechanism supplies pressurized gas to a nozzle chamber which urges the nozzle in an outward direction to an open position, the needle remaining stationary during operation of the nozzle. Deactuation of the trigger mechanism stops the flow of pressurized gas to the chamber and a vent allows the pressurized gas to flow from the chamber, permitting a spring-biasing mechanism to return the nozzle to a closed position. Pressure on the adhesive can also be employed to urge the nozzle to an open position.

REFERENCES:
patent: 3076583 (1963-02-01), Eberspacher
patent: 3877610 (1975-04-01), Dickey
patent: 3951308 (1976-04-01), Thirtle

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