Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
Reexamination Certificate
2000-04-11
2001-10-02
Mai, Huy (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Connectors
C351S152000, C351S106000
Reexamination Certificate
active
06296357
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a clamping device for spectacle lenses.
More particularly, the present invention relates to a device suitable for fastening and clamp a spectacle lens respectively to the spectacle frontal frame and/or to the nose pad carrying element, said device allowing the lens to be kept clamped against said elements with no need to drill and/or to mill the lens, and with no need to settle any frame or peripheral rim to the lens.
The invention can be applied specifically in the field of spectacles manufacturing.
BACKGROUND ART
In the spectacle manufacturing industry, there is always the need to optimize technical methods in order to lower the spectacles weight and dimensions as much as possible and, moreover, to succeed in realizing new aesthetical shapes and to give the opticians the greatest flexibility in fitting lenses to spectacles.
In this context, a method if known in the art according to which the lens is directly clamped to the frontal frame and/or nose pad carrying element, in order to achieve a correct clamping of the lens and its steadiness relative to the frontal frame and/or nose pad carrying element, the lens is drilled and/or milled at its peripherical edge, and the frontal frame and/or nose pad carrying element are directly connected and fastened to the lens by means of a through screw.
Other solutions known in the art relate to the use of joining systems.
Said solutions involve some important drawbacks and disadvantages since that drilling lenses, operation which is carried out by means of very particular drills to be used with great accuracy, often causes breakages and cracks in the lenses, and this considerably increases spectacles production and assembling costs.
DESCRIPTION OF THE INVENTION
The present invention aims to obviate to the drawbacks and disadvantages of the prior art by providing a device for clamping a spectacle lens to a frontal frame and/or nose pad carrying element which does not require the lens to be bored or drilled.
This is achieved by means of the features described in the main claim.
The dependent claims outline particularly advantageous forms of embodiment of the device according to the invention.
According to the invention, the clamping device comprises a bridge, which is rotatable about a pin fixed to the body of the frontal frame or to the nose pad carrying element of the spectacle, said bridge being provided with two opposite ends relative to said pin, of which:
a first end is provided with a thread suitable for cooperating with a screw which is suitable for causing the rotation movement of the bridge about said pin; and
the second end directly cooperates with the lens, by exerting a force on the surface of said lens, said force keeping the lens pressed against a conjugate element which is present on the body of the frontal frame and/or of the nose pad carrying element.
First of all, such a form of embodiment allows to avoid the use of through screws in the lens body for its fastening, thereby achieving the purposes of the present invention.
Secondly, the optician has a higher flexibility in assembling the lens to the frontal frame and/or nose pad carrying element, since there is no predetermined clamping point (as it is the case of a drill in the lens) and the lens can be clamped in many different positions conferring different shapes to the spectacle according to any optical or aesthetic needs.
REFERENCES:
patent: 2439357 (1948-04-01), Bouchard
patent: 2680847 (1954-06-01), Ball
patent: 4176921 (1979-12-01), Matthias
patent: 4504127 (1985-03-01), Cottet
patent: 3612989 (1987-10-01), None
patent: 0 790 519 A1 (1996-06-01), None
Bline Optic, S.r.L.
Mai Huy
Oppenheimer Wolff & Donnelly LLP
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