B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/1.6
B23K 31/10 (2006.01) A61F 2/00 (2006.01) A61F 2/12 (2006.01) B23K 26/08 (2006.01) B23K 26/38 (2006.01) B29C 33/38 (2006.01) B29C 59/16 (2006.01) B29C 35/08 (2006.01)
Patent
CA 2025484
-11- METHOD OF LASER MACHINING MOLDS WITH MICROTEXTURED SURFACES ABSTRACT A process is provided for preparing a three dimensional object such as a mandrel for forming envelopes for mammary prostheses or other implantable medical device by dipping the mandrel, etc. The envelopes are provided with micropillars on the exterior surface which resembles the mandrel surface in negative relief. According to the process a workpiece of solid stock material such as polymer is provided in the shape of the desired prostheses. It is positioned for rotation on a supporting shaft or other holding mechanism. A pulsing laser beam, directed at the workpiece is moved in a plane parallel to the axis of rotation of the workpiece while the beam is maintained approximately perpendicular to the workpiece surface. The rate of pulsing of the laser beam and the speed of rotation of the workpiece are controlled to produce patterns of blind micro-holes on the surface of the workpiece. A noncircular pattern can be produced by oscillating the beam toward and away from the axis of rotation with each revolution of the workpiece.
Curtis James M.
Sanders Ronald S.
Curtis James M.
Gowling Lafleur Henderson Llp
Sanders Ronald S.
LandOfFree
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