Lens blocking system
AssigneeOptima, Inc.
InventorsNicholas G. Niejelow, Shane M. Swift
Life of this patent
Estimating the term…
Abstract
A method of blocking ophthalmic lenses for edging comprises providing an ophthalmic lens having first and second surfaces, providing a first block for securing against the first lens surface and a second block for securing against the second lens surface. The method then includes placing an adhesive layer on the first block, placing a film having cling properties between the adhesive layer and the first lens surface, and urging the first block toward the first lens surface and the second block toward the second lens surface. The film having cling properties provides sufficient bonding force between the adhesive layer and the first lens surface to prevent the ophthalmic lens from slipping in the blocks during edging thereof.
Claims24
A method of blocking ophthalmic lenses for edging comprising providing an ophthalmic lens having first and second surfaces, providing a first block for securing against the first lens surface and a second block for securing against the second lens surface, placing an adhesive layer on the first block, placing a film having cling properties between the adhesive layer and the first lens surface, and urging the first block toward the first lens surface and the second block toward the second lens surface, whereby the film having cling properties provides sufficient bonding force between the adhesive layer and the first lens surface to prevent the ophthalmic lens from slipping in the blocks during edging thereof.
A method of blocking and edging ophthalmic lenses having hydrophobic anti-reflective coatings comprising:
- providing an ophthalmic lens having first and second surfaces, the lens having a hydrophobic anti-reflective coating on at least the first surface;
- providing a first block having a surface with a configuration to apply pressure substantially uniformly to the first lens surface and a second block for applying pressure against the second lens surface;
- placing an adhesive layer on the first block surface;
- placing a film having cling properties between the adhesive layer and the first lens surface;
- urging the first block toward the first lens surface and the second block toward the second lens surface to hold the ophthalmic lens therebetween;
- and
- grinding the edge of the ophthalmic lens, whereby the film having cling properties provides sufficient bonding force between the adhesive layer and the first lens surface to prevent the ophthalmic lens from slipping in the blocks during edging thereof.
In a blocking system for edging ophthalmic lenses having first and second surfaces, a first block for securing to the first lens surface and a second block for securing to the second lens surface, and an adhesive layer between the first block and the first lens surface, the improvement comprising providing a film having cling properties between the adhesive layer and the first lens surface.
An apparatus for blocking ophthalmic lenses having first and second surfaces for edging comprising:
- a first block for securing against the first lens surface;
- a second block for securing against the second lens surface;
- an adhesive layer disposed on the first block;
- a film having cling properties disposed between the adhesive layer and the first lens surface, the film having cling properties providing sufficient bonding force between the adhesive layer and the first lens surface to prevent the ophthalmic lens from slipping in the blocks during edging thereof.
Dependencies are inferred from the claim text.