Apparatus for coating items

Details Apparatus for coating items Apparatus for coating items

1981-06-15

1982-08-24

Hoffman, James R.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to attribute, absence or presence of work

118423, B05C 302, B05C 310

Patent

active

043455468

ABSTRACT:
The invention comprises a method and apparatus 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.

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