Apparatus for tailing reduction in hot-melt dispensing of drople

Coating apparatus – Projection or spray type

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Details

156578, 239 8, 239296, 239300, B05C 504

Patent

active

049709852

ABSTRACT:
An apparatus and method for reducing hot-melt adhesive tailing in an adhesive pattern wherein material squirted or extruded from a nozzle in a desired pattern experiences tailing. The adhesive is released from a material passageway along a trajectory, with an array of gas passageways radially and symmetrically surrounding the material passageway in an inclined manner. A gradual flow of gas from the gas passageways is directed to strike the adhesive tailing, thereby urging the tailing to follow the intended deposition trajectory. Like the adhesive, the release of gas may be valved or, alternatively, the gas may be a steady flow.

REFERENCES:
patent: 3348520 (1967-10-01), Lockwood
patent: 3661679 (1972-05-01), Law
patent: 4031854 (1977-06-01), Sprague, Jr.
patent: 4280864 (1981-07-01), Bromberg
patent: 4642158 (1987-02-01), Steinel et al.
patent: 4785996 (1988-11-01), Ziecker et al.
patent: 4815660 (1989-03-01), Boger
patent: 4844003 (1989-07-01), Slautterback et al.

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