Method for coating items

Details Method for coating items Method for coating items

1982-04-22

1984-06-19

Hoffman, James R.

Coating processes

Measuring, testing, or indicating

427162, 427164, 427169, 4274301, B05D 118, G02B 110

Patent

active

044553226

ABSTRACT:
The invention comprises a method for providing a coating to objects such as a lens. A bath of coating solution is provided and the objects are immersed into the solution and removed from the solution at a constantly changing speed. The speed of removal is slower at the top and bottom of the object and faster at the midpoint of the object. Thus the coating is thinner at the top and bottom and thicker at the center (where greater abrasion resistence is required). The slower speed at the removal of the bottom edge of the lens from the solution provides a thin coating and eliminates the formation of coating drip lines and puddles.

REFERENCES:
patent: 3956540 (1976-05-01), Laliberte et al.
patent: 4036168 (1977-07-01), Laliberte et al.
patent: 4267208 (1981-05-01), Ireland

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