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US 4,145,125 AGranted
Eyeglass lens with indicia and method of making same
OwnerHani Chikainventor
Life of this patent
Estimating the term…
Abstract
Eyeglass lenses ordinarily of the plastic, or hard resin, type which are tinted by means of a deep penetrating dye which becomes part of the molecular structure of the lens, are masked prior to being dipped into the dye solution to produce along a margin displaced from the optical center of the lens indicia such as the name of the wearer, or some other figure or symbol.
Claims8
An eyeglass lens comprising:
- (a) a body made of a synthetic material;
- (b) said body having a first portion and a second portion, at least one of said portions having dye deeply absorbed therein and being visually distinct from the other of said portions;
- (c) said first portion being adjacent the periphery of said lens and being substantially surrounded by said second portion such as to define a substantially integral indicia-forming area on said lens which is generally imperceptible to the wearer of said lens but visible to observers as decorative or identifying indicia.
A process for manufacturing an eyeglass lens having indicia thereon comprising:
- (a) masking portions of said lens to leave selected areas of said lens exposed;
- (b) dipping said lenses into a dye of a type which is absorbed into the material of the lens;
- (c) removing said masking to expose undyed portions of the lens which together with the dyed portions of the lens define areas of contrast which form indicia on the lens.
Dependencies are inferred from the claim text.