Lens blank, and a method and a mold for fabricating it
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United States of America Patent
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Apr 27, 2010
Grant Date -
May 17, 2007
app pub date -
Nov 14, 2006
filing date -
Nov 15, 2005
priority date (Note) -
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Abstract
A lens blank having a base prefitted with an insert and peripheral ejector marks on the base provided outside an outermost portion of the insert. The ejector marks are carried by a tab of the base having extra thickness on the same side as the insert, and a recess in its other side, the recess forming an element for centering the spacer of an adjacent blank, which is superposed thereon.
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