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US 2019/0187616 A1Published application
Mainspring for a movement of a timepiece and method for manufacturing the same
AssigneeNivarox-FAR S.A.
InventorsJonas VANNOD, Christian CHARBON
Life of this patent
Estimating the term…
Abstract
A mainspring including a spiral metal strip and a hooking area formed in an inner face of an inner end of the strip, the hooking area including at least one shaped portion and/or at least one cavity comprised in the inner face of the inner end.
Claims16
A method for manufacturing a mainspring for a movement of a timepiece comprising a step of producing a spiral metal strip and a hooking area on an inner face of an inner end of said strip, the hooking area including at least one shaped portion and/or at least one cavity, wherein said production step is devoid of a rolling phase and/or a stamping phase.
Dependencies are inferred from the claim text.