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US 4,476,162 AGranted
Method for coating lenses
OwnerJack W. Irelandinventor
Life of this patent
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OwnerJack W. Irelandinventor
Estimating the term…
Coating of the convex side of an optical lens for blocking purposes by spinning the lens about its vertical axis and dipping its downwardly facing convex side in a liquid coating material, stopping the rotation of the lens and upwardly withdrawing the lens above the level of the coating material, and spinning the upwardly withdrawn lens to spread the coating material by centrifugal force as a uniformly thin film over the convex side and to drive the film sufficiently for handling. To facilitate the lens coating operation, the lens is held on its upper concave side by a suction cup having the upper end of its vibration damping stem chucked in the drive shaft of a hand held motor housing. To further facilitate the lens coating operation despite leakage between the suction cup and the lens, the drive shaft has a passage therethrough communicating with a passage from the suction side of the suction cup through the stem and with a flexible suction tube leading to the suction port of a power vacuum motor.
In the method of coating the convex side of a lens wherein the convex side of the lens is dipped in a liquid coating material, is upwardly withdrawn to drain excess coating material therefrom, and is rotated to spread the coating material over the convex side of the lens as a thin uniform coating for drying, the improvement which comprises rotating the lens while dipped in the coating material.
A method of coating the convex side of the lens comprising the steps of rotating the lens about a vertical axis with its convex side facing downwardly;
The method of coating the convex side of a lens comprising the steps of securing the concave side of the lens to a suction cup having a tubular stem communicated with a power vacuum source;
Dependencies are inferred from the claim text.