ANTIFRICTION COATING FOR MAINSPRING MADE OF COMPOSITE MATERIAL
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
Nov 30, 2012
filing date -
Dec 9, 2011
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Abstract
Mainspring for driving a clock movement, said mainspring being made of a material comprising a polymer matrix containing fibres, said mainspring having a coating containing a thermoset or thermoplastic polymer. The mainspring proposed reduces the friction of the turns of the mainspring.
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