B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/104
B29D 11/00 (2006.01) B29C 33/00 (2006.01) B29C 33/30 (2006.01) B29C 35/08 (2006.01) B29C 37/00 (2006.01)
Patent
CA 1070066
ABSTRACT OF THE DISCLOSURE Apparatus for and method of forming ophthalmic lenses and/or semi-finished lens blanks including those of the eye contact type. The apparatus includes molds having co- operating first and second members each of which includes a longitudinal axis and a mold surface which is symmetrical with respect to such axis. In one embodiment these mold members or halves also include cooperating surfaces which, in operation and in cooperation with the selected lens material, both align the respective mold axes and axially position the mold surface of the first member with respect to the mold surface of the second member to thereby form the desired lens mold cavity. Further, each of the assembled molds also includes an annular reservoir which surrounds the mold cavity, and is defined by surfaces provided on the first and second mold members. This reservoir is connected to the mold cavity via an annular restriction. In one embodiment this restriction is defined by the cooperating aligning surfaces provided on the first and second mold members. In operation, the reservoir holds a volume of lens material which, during the polymer forming reaction, is kept in a flowable state longer than the lens material in the mold cavity. This arrangement permits the transfer of lens material between the reservoir and the mold cavity during curing. Apparatus is also provided for removing selected portions of the cast lens in those instances where removal is either necessary or expedient. - 2 -
225087
Clark James A.
Livesey Donald V.
Wrue Richard J.
Bausch And Lomb Incorporated
Na
LandOfFree
Apparatus for and method of forming optical lenses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for and method of forming optical lenses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for and method of forming optical lenses will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1101713