System for fastening bridge and temples in the manufacture of eyeglasses

Eyeglasses (100) comprising:

• two lenses (L), each lens having a pair of holes (61, 62, 63, 64) at a predetermined distance from each other;
• a bridge (30) and a pair of fronts (10, 20) furnished with hinge elements connecting the fronts to a pair of temples (A);
• tubular sleeves (53, 54) housed in the lens holes,
• wherein the bridge (30) and the fronts (10, 20) are furnished with pairs of prongs (33-34, 36-37, 13-14, 23-24) projecting from the selfsame bridge and fronts to be operatively inserted into the tubular sleeves (53, 54), the prongs having flat lateral faces,
• wherein the prongs have, along the longitudinal edges where lateral and vertical walls of the respective prong meet, a rough texture formed by a plurality of protrusions projecting in cantilever fashion from lateral surfaces defining the edge.

A method for making ultralight eyeglasses, comprising a step of providing a bridge and hinge elements connecting respective temples to respective lenses with ends which are furnished with fork-shaped structures, each of the latter having at least two prongs (33-34, 36-37, 13-14, 23-24), by punching out from a metal plate, the prongs being furnished with vertical walls (13a-13b, 14a-14b, 23a-23b, 24a-24b, 33a-33b, 34a-34b, 36a-36b, 37a-37b) which are flat and smooth;

• a step of forming holes (61, 62, 63, 64) in the lenses at the points of connection with the ends of the bridge (30) and of the temple connecting hinge elements (10, 20), the holes being equal in number to the number of prongs on the respective fork-shaped structures at the ends of the bridge (30) and of the temple connecting hinge elements (10, 20);
• a step of inserting tubular sleeves (53, 54), furnished with a cap at one end, into the corresponding holes (61, 62, 63, 64) formed in the lenses, making the sleeve cap adhere to the inside surface of each lens;
• a step of cutting the portion, if any, of the sleeves (53, 54) which protrudes from the outside surface of the lenses, thereby adapting the length of the sleeves (53, 54) to the actual thickness of the lenses;
• and a step of pressing the prongs (33-34, 36-37, 13-14, 23-24) of the fork-shaped structures into the portion of the tubular sleeves (53, 54) housed inside the holes in the lenses.