Dispensing – With heating or cooling means – Cooling only
Patent
1975-04-07
1977-02-08
Tollberg, Stanley H.
Dispensing
With heating or cooling means
Cooling only
165156, 401 2, B67D 562
Patent
active
040068455
ABSTRACT:
A novel handle structure, and a novel heat exchanger structure, for a hand-held adhesive gun of the type adapted to discharge a heated thermoplastic adhesive through a discharge valve located in the gun's barrel. In preferred form, the novel handle structure is positioned at the aft end of the gun's barrel, and has a longitudinal axis extending rearwardly of the gun's barrel and located at an acute angle relative to the longitudinal axis of the gun's barrel. The gun's handle is positionable about the gun barrel's longitudinal axis between at least two operating locations, one being positioned 180.degree. from the other. A gun control switch is mounted interiorly of the handle, the switch being mechanically operated by the gun's trigger. At least two ports are provided in the handle, one at the foot of the handle and the other adjacent the gun's barrel, the power cord that interconnects with the gun control switch being receivable into the handle through either port depending on the use orientation of the handle. Also in preferred form, the novel heat exchanger includes a heat exchanger core fixed in location within a heater body's bore. The heat exchanger core has spiral threads on the outer surface thereof, and the bore's surface has spiral threads thereon, too. The heat exchanger core's threads are sized relative to the inlet bore's threads such that the core can be threaded into the bore, and such that the threads cooperate to define a spiral path about the core through the bore from one end to the other, thereby defining a spiral heat exchange path through the gun's heater body. This novel heat exchanger is particularly adapted to elevate the temperature of the molten adhesive, just prior to dispensing it, above that temperature level at which the molten adhesive is supplied to the hand gun.
REFERENCES:
patent: 2341319 (1944-02-01), Graham et al.
patent: 2778530 (1957-01-01), Sillars
patent: 2790679 (1957-04-01), Martindale
patent: 3221937 (1965-12-01), Kamborian
patent: 3485417 (1969-12-01), Cocks
patent: 3582613 (1971-06-01), Pies
patent: 3718805 (1973-02-01), Posey
patent: 3864045 (1975-04-01), Hudson
patent: 3942687 (1976-03-01), Walus
Reighard Alan B.
Scholl Charles H.
Lane Hadd
Nordson Corporation
Tollberg Stanley H.
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