Preparation of differential thickness coatings by dip coating wh

Details Preparation of differential thickness coatings by dip coating wh Preparation of differential thickness coatings by dip coating wh

1991-06-10

1992-10-06

Beck, Shrive

Coating processes

Optical element produced

Polarizer, windshield, optical fiber, projection screen, or...

427169, 427287, 427346, 4274301, 118416, B05D 506

Patent

active

051530279

ABSTRACT:
A substrate, bearing a coating having a thickness which varies in more than one direction across the surface of the substance, is prepared by a process wherein the substrate is immersed into a coating medium bath, then withdrawn in a predetermined direction and at a predetermined rate, and simultaneously pivoted at a predetermined angular velocity about an axis which is orthogonal to the direction of withdrawal.

REFERENCES:
patent: 3105776 (1963-10-01), Weyhmueller
patent: 3341353 (1967-09-01), Johnson
patent: 3429358 (1969-02-01), Tingquist et al.
patent: 4268206 (1981-05-01), Johnson
patent: 4271210 (1981-06-01), Yoldas
patent: 4455322 (1984-06-01), Weber
patent: 4597931 (1986-07-01), Watanabe et al.
patent: 5061529 (1991-10-01), Ruehl

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