Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1991-02-25
1991-12-17
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
2426, 264 17, 264262, 264263, B29C 3912, B29D 1100
Patent
active
050733249
ABSTRACT:
A method for setting an ophthalmic lens in a pair of goggles having a flat front transparent lamina for permitting vision and also having a shielding rim surrounding the lamina extending towards the face of the wearer for the abutment thereon is characterized by a lens secured inside the shielding rim adjacent the lamina. The ophthalmic lens has a flat plane adjacent the lamina separated therefrom by an air gap. A first silcone-base caulking is deposited between the periphery of the lens and the shielding rim up to a level substantially corresponding to the thickness of the air gap. This first caulking has a viscosity sufficiently sag-proof to maintain the caulking at the periphery of the gap during its hardening. A second caulking having a lower viscosity is deposited on the top of the first caulking up to a level corresponding to the top of the lens. The caulking is selected to be free of toxic and corrosive gas. The lens has a peripheral groove to improve the adherence of the second caulking.
REFERENCES:
patent: 2355015 (1944-08-01), Splaine et al.
patent: 2373388 (1945-04-01), Fischer
patent: 3415595 (1968-12-01), Nelson
patent: 4290673 (1981-09-01), Yamamoto
Lowe James
Morneau Roland L.
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