Glass manufacturing – Processes – Fusion bonding of glass to a formed part
Patent
1988-09-08
1990-01-23
Lindsay, Robert L.
Glass manufacturing
Processes
Fusion bonding of glass to a formed part
65 594, 65 64, 264 27, 425808, C03B 1108
Patent
active
048955850
ABSTRACT:
A method of manufacturing lens elements, in which a glass preform heated to the softening temperature and an annular metal holder (3) enclosing the glass preform are arranged between the heated moulding dies (7,9) of a mould and are moulded in a pressing step into a lens element comprising a glass lens (21) and a ring (3) enclosing the glass lens and acting as a fitting. During moulding, the ring 3 forms together with the two dies (7,9) a quasi closed moulding cavity having an annular gap (15). During moulding, the ring (3) is expanded radially and a quantity of glass is pressed.
REFERENCES:
patent: 2410616 (1946-11-01), Webb
patent: 4591373 (1986-05-01), Sato
"Archiv Fur Elektronik und Ubertragungstechnik" (AEU), vol. 34, pp. 385-393, No. 10, Oct. 1980.
Angenent Johannes H.
Hattu Nicodemus
Heller Petrus
Lemmens Petrus A.
Potters Cornelis J. T.
Botjer William L.
Lindsay Robert L.
U.S. Philips Corp.
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