Dispensing – With heating or cooling means – Cooling only
Patent
1978-05-09
1980-04-22
Knowles, Allen N.
Dispensing
With heating or cooling means
Cooling only
222323, 222380, 222389, 221299, 221 12, B67D 562
Patent
active
041990820
ABSTRACT:
A hot melt adhesive gun capable of dispensing relatively large volumes of molten adhesive and comprising a hot melt chamber and a pressurized air chamber separated by a moveable element which isolates the chambers one from the other. Molten adhesive from an associated bulk supply is fed into the hot melt chamber by means of a supply nozzle temporarily plugged into a valved inlet passage of the gun only when necessary to charge the gun with a fresh supply of molten adhesive. Upon actuation of the gun trigger, pressurized air in the air chamber, drives the moveable element forward to cause adhesive to flow out of the nozzle. Upon release of the trigger, adhesive flow from the nozzle valve is discontinued. The novel gun also includes a pressure relief valve and relief port to allow the escape of trapped gas which can build up in the melted adhesive and which exceeds a predetermined pressure level.
REFERENCES:
patent: 2567960 (1951-09-01), Myers et al.
patent: 2646199 (1953-07-01), Paulsen
patent: 2809772 (1957-10-01), Weisz
patent: 3082907 (1963-03-01), Patzer
patent: 3432076 (1969-03-01), Arsenault
patent: 3773069 (1973-11-01), Rebentisch
Knowles Allen N.
Ornsteen Chemicals, Inc.
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