Coating method and apparatus of an extrusion-type coating head h

Details Coating method and apparatus of an extrusion-type coating head h Coating method and apparatus of an extrusion-type coating head h

1992-04-10

1993-07-13

Jones, W. Gary

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118419, 210446, B05C 300

Patent

active

052269639

ABSTRACT:
A coating method and apparatus employing an extrusion-type coating head in which the probability of damaging the surface of the layer being formed on a support is remarkably decreased. Coating solution, such as a magnetic solution for forming a magnetic recording tape or the like, is supplied by a pump through a pipe line and then a filtering element to the extrusion-type coating head, which applies the coating solution directly or through a coating roll onto a running support. The filtering element, which is disposed at or near the coating solution supplying inlet of the extrusion-type coating head, has openings whose diameter is smaller than a coating clearance between a doctor edge of the extrusion-type coating head and the support or coating roll.

REFERENCES:
patent: 3033783 (1962-05-01), Lubben
patent: 4043739 (1977-08-01), Appel
patent: 4442003 (1984-04-01), Holt
patent: 4687137 (1987-08-01), Boger et al.
patent: 4849103 (1989-07-01), Schmidt et al.
patent: 4875846 (1989-10-01), Reinbold
patent: 5000112 (1991-03-01), Rothen et al.

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