Methods for separating material from a mold surface
AssigneeBausch & Lomb Incorporated
InventorsMichael H. Dobner, Craig A. Barrile-Josephson
Life of this patent
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Abstract
Method for removing unwanted excess material from a mold section is particularly adapted for removing a monomer ring adhered within a reservoir of a female mold section used to mold a contact lens. The invention involves piercing the monomer ring and rotating the piercing members (e.g., annularly spaced pins) relative to the mold section whereby the monomer ring is sheared from the mold section to which it was adhered while the molded lens is left intact in the mold section.
Claims3
A method for removing a monomer ring from a mold configured for molding an ophthalmic lens, said method comprising the steps of piercing the monomer ring with a plurality of annularly spaced pins and rotating the pins relative to the mold to shear the monomer ring from the mold.
Dependencies are inferred from the claim text.