Dispensing – Plural sources – compartment – containers and/or spaced jacket – Interconnected discharge volume varying means
Patent
1974-12-26
1977-07-05
Hoffman, Drayton E.
Dispensing
Plural sources, compartment, containers and/or spaced jacket
Interconnected discharge volume varying means
222148, 222484, 239414, B67D 534
Patent
active
040334813
ABSTRACT:
The dispensing apparatus is especially adapted for metering, mixing and dispensing small "shots" of synthetic resin material in liquid form with a minute percentage of a liquid catalyst for patching defects in wood panels. A hand-held dispensing gun of the apparatus has a static mix tube extending from a mixing chamber in a dispensing head where a single air-operated piston upon trigger actuation simultaneously opens resin and catalyst infeed ports to the mixing chamber. At the same time, trigger actuation connects a control air line from a source of compressed air to a pilot air line to start an air motor which drives resin and catalyst metering pumps. These pumps are driven from a common drive shaft with an adjustable mechanical linkage for adjusting the catalyst-resin metering ratio. The pumps meter resin and catalyst through separate lines to the mix chamber of the dispensing gun. A thermostatically controlled heater preheats the resin as it flows to the dispensing gun. An air-powered flush system selectively flushes the mixing chamber and mix tube with an atomized solvent to prevent set-up of resin in these parts. A combined electrical-air operated flush-warning system with an automatic trigger-actuated reset reminds the operator to flush the system when the gun is not used to dispense material for a prolonged period.
REFERENCES:
patent: 3207378 (1965-09-01), Trumbull et al.
patent: 3212676 (1965-10-01), Trumbull et al.
patent: 3237808 (1966-03-01), Witt et al.
patent: 3263928 (1966-08-01), Gusmer
patent: 3615241 (1971-10-01), Plakas
patent: 3741441 (1973-06-01), Eberle
patent: 3799403 (1974-03-01), Probst et al.
Hicks Prentiss C.
Turrentine Fred C.
Artek Industries, Inc.
Hoffman Drayton E.
Rolla Joseph J.
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