System of polishing external pieces for a timepiece
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United States of America Patent
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Mar 13, 2018
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N/A
app pub date -
Feb 17, 2012
filing date -
Mar 16, 2011
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Abstract
A system of polishing a concave surface of an external piece for a timepiece, including a securing device including a support that carries the piece, and a grinding device including an abrasive mechanism rotatably mounted along a first axis and configured to polish the piece along a first curvature. The securing device further includes a moving mechanism of the support so that the support imparts a back-and-forth motion along a second axis and a contact surface of the abrasive mechanism is curved to polish the piece along a second curvature in addition to the first curvature. The system can be applied to the field of crystals for a timepiece.
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