PREFORMED BLOCK PIECE HAVING A HOLDING SURFACE WITH AN AXIS THAT IS OFFSET RELATIVE TO THE AXIS OF ROTATION OF THE BLOCK PIECE
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United States of America Patent
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Issued Date -
Sep 5, 2013
app pub date -
Feb 20, 2013
filing date -
Aug 10, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A block piece for holding an optical lens to be machined, with a coupling part for being held in a workpiece chuck and with a holding part for fastening the lens. The holding part has a convex or concave holding surface corresponding to a first side of the lens. The holding surface is, according to the shape of the lens to be held, provided in the form of a negative free-forming surface, and the block piece is made from a plastic that can be machined. The principal axis of the holding surface is arranged set off and/or tilted relative to the axis of rotation of the coupling part
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