System for pin-point application of a removable conformal coatin

Details System for pin-point application of a removable conformal coatin System for pin-point application of a removable conformal coatin

1994-06-02

1996-01-09

McMahon, Timothy M.

Coating apparatus

Projection or spray type

With projector heating, cleaning or conditioning

118667, 118682, 239130, 239134, 239142, 239175, B05B 716, B05B 1502

Patent

active

054825539

ABSTRACT:
A system for pin-point injection or application of a viscous, hot-melt conformal coating which is injected or applied onto a surface of an article and is readily removable from the surface to provide a temporary mask to selected areas of the article. The system includes a material supply unit which can accept the coating in at least one of granular, flake, chunk or block form and can heat the coating to transform the coating into a substantially viscous form for pumping out of the unit by a pump member. A heatable hose is also included having first and second opposite ends, the first end being connected for operable communication with the pump member and the hose including a heating element controlled by the supply unit and positioned along the length of the hose for maintaining a desired temperature within an interior of the hose. A pin-point nozzle member is connected to the second end of the hose for dispensing the coating at least onto localized minute areas of the article, the nozzle member including a valve member positioned therein which conducts heat from the hose to the nozzle member to maintain a desired temperature of the adhesive at the point of application and provides a precise cut off of the coating upon demand.

REFERENCES:
patent: 3859113 (1975-01-01), Horvath et al.
patent: 4261272 (1981-04-01), Duesher
patent: 4344571 (1982-08-01), Kundig
patent: 4746553 (1988-05-01), Crisafulli
patent: 4970985 (1990-11-01), Slautterback
patent: 5271953 (1993-12-01), Litteral

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