(57) A needle printing head, of the permanent magnet type where resilient armatures (8)
are released owing to the energization of demagnetizing coils and where each of the
armatures comprises a resilient magnetic leaf cantilever mounted, an actuation arm
(16) extending beyond a free end of the leaf in form of a rigid plate arranged perpendicularly
to the leaf plane and fixed to the leaf by means of a cogging groove into which the
free end of the leaf is inserted and by welding of the contact surfaces of the two
elements.
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