Mold assembly for lens blank, having mold cavity and material reservoir defined by press-fitting engagement of upper and lower molds with intermediate sleeve
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United States of America Patent
Stats
-
Aug 21, 2001
Grant Date -
N/A
app pub date -
Aug 4, 1999
filing date -
Aug 11, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Mold assembly for forming a lens blank for an ophthalmic lens, wherein upper and lower tapered inner surfaces of intermediate sleeve are adapted to be held in press-fitting engagement with respective outer surfaces of upper and lower molds, to effect fluid-tight connection of the upper and lower molds with the intermediate sleeve, with the upper mold being held in abutting contact with a shoulder of the intermediate sleeve, and with stopper surfaces of the intermediate and lower molds being held in abutting contact with each other to determine a relative axial position therebetween, such that a mold cavity to be filled with a liquid monomer composition is defined by the upper and lower molds and the intermediate sleeve, while a liquid reservoir for storing an excess amount of the monomer composition which has been discharged from the mold cavity is defined by the upper mold and the intermediate mold.
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