Apparatus for coating a multiple number of layers onto a substra

Details Apparatus for coating a multiple number of layers onto a substra Apparatus for coating a multiple number of layers onto a substra

1975-06-19

1976-12-14

McIntosh, John P.

Coating apparatus

With vacuum or fluid pressure chamber

118411, B05C 502

Patent

active

039968855

ABSTRACT:
An improved extrusion-slide coating hopper for multi-layer coating of a substrate is described. The improved extrusion-slide coating hopper includes an upturned generally horizontally directed lip, which lip extends at an obtuse angle from an inclined slide surface and toward the substrate to be coated. A coating composition may be made to flow down the inclined slide and then upon the generally horizontally directed lip before being introduced on top of an extruded bridge of coating composition. The bridge of coating composition spans a generally horizontal gap between the hopper and the upwardly moving substrate. The apparatus of the invention improves upon coating apparatus of the prior art by providing, when coating, increased bridge stability and minimization of the deleterious effects of particles that lodge at an edge of the hopper.

REFERENCES:
patent: 2761417 (1956-09-01), Russell et al.
patent: 2975754 (1961-03-01), Wright
patent: 3627564 (1971-12-01), Mercier
patent: 3916043 (1975-10-01), Fowble

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