Process and device for covering a lens preform with a protective

Details Process and device for covering a lens preform with a protective Process and device for covering a lens preform with a protective

1984-05-25

1986-01-14

Lowe, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156493, 156581, 264 17, B29D 1100

Patent

active

045644080

ABSTRACT:
To cover the concave face of a lens preform with a protective sheet of transparent plastic by an elastic pressing element, the invention proposes inserting an elastic membrane between the pressing element and the protective sheet. Before or during pressing, the membrane is lowered over the preform which has been provided with the protective sheet. As a result of its presence, the entire peripheral area of the protective sheet can be applied homogeneously against the edge of the preform.

REFERENCES:
patent: 3128322 (1964-04-01), Young
patent: 3322598 (1967-05-01), Marko et al.
patent: 3769133 (1973-10-01), Halberschmidt et al.
patent: 4180426 (1979-12-01), Oustin et al.

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