Method and apparatus for manufacturing contact lenses
AssigneeParagon Vision Sciences, Inc.
InventorHank Stute
Life of this patent
Estimating the term…
Abstract
The present invention is directed towards adhering a contact lens button on a fixture for use in shaping, forming and/or otherwise configuring a contact lens. For example, in accordance with one exemplary embodiments of the present invention, a combination of adhesive materials are used to adhere the lens to the fixture. For example, a first layer of water soluble adhesive is placed on the lens button. A second layer of non-water soluble adhesive is then placed on the first layer, and the button is mounted to the fixture. Both layers are subsequently removable by placing the button in a water bath, dissolving the water soluble layer and likewise separating the water insoluble layer.
Claims9
A method for securing a lens button to a lens machining tool fixture, comprising the steps of:
- applying a layer of water soluble adhesive to a lens button;
- applying a layer of a non-water soluble adhesive to said water soluble layer;
- and
- using said non-water soluble layer to adhere the lens button to the tool fixture.
A method for manufacturing a contact lens, comprising the steps of:
- applying a layer of water soluble adhesive to a lens button;
- applying a layer of a non-water soluble adhesive to said water soluble layer;
- using said non-water soluble layer to adhere the lens button to a tool fixture;
- inserting said tool fixture into a lens manufacturing machine;
- shaping said lens button;
- removing said lens button from said tool fixture;
- and
- placing said lens button in a water solution to dissolve said water soluble layer, thereby removing said non-water soluble layer from said lens button.
A contact lens button and adhesive combination used in the manufacture of contact lenses, comprising:
- a contact lens button;
- a layer of water soluble adhesive on said lens button;
- and
- a layer of a non-water soluble adhesive on said water soluble layer.
Dependencies are inferred from the claim text.