Needle printing head
AssigneeCompuprint SpA
InventorsAndrea Garramone, Ettore Quattrini, Roberto Boggio
Life of this patent
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Abstract
A needle printing head comprising a support (11) able to axially guide a plurality of printing needles (15), each of which has one end attached to a mobile armature (16) of a corresponding actuation electromagnet (17) having a ferromagnetic core (18) provided with polar extensions. A separation element (30) is interposed between the mobile armatures (16) and the corresponding polar extensions. The separation element (30) is made of a metal material and comprises elements (33, 34) able to reduce the effects of the eddy currents which are generated by the energizing of every electromagnet (17).
Claims11
Printing head with needles comprising a support (11) able to axially guide a plurality of printing needles (15), each of which has one end attached to a mobile armature (16) of a corresponding actuation electromagnet (17) having a ferromagnetic core (18) provided with polar expansions, a separation element (30) being interposed between the mobile armatures (16) and the corresponding polar expansions, the printing head being characterized in that said separation element (30) is made of a metal material and comprises means (33, 34) able to reduce the effect of the eddy currents which are generated by the energizing of every electromagnet (17).
Dependencies are inferred from the claim text.