EP 0041126 A2 19811209 - Mosaic printing head with cross-talk prevention means.
Title (en)
Mosaic printing head with cross-talk prevention means.
Title (de)
Mosaikdruckkopf mit Mitteln zur Verhinderung des Übersprechens.
Title (fr)
Tête d'impression à mosaique avec installations pour la prévention de la diaphonie.
Publication
Application
Priority
IT 2181580 A 19800506
Abstract (en)
A mosaic printing head with cross talk prevention means comprises a plurality of electromagnetic structure formed by magnetic circuits (39), each coupled to a coil (41) and closed by a movable armature (43), which at rest leave an air gap in the magnetic circuit. The magnetic circuits are radially distributed on a supporting member, very closely together at least with a certain portion. The flux leakage which occurs in these portions, due to the proximity of such portions, is avoided by using conductive non magnetic shields (42) partially surrounding such portions. The shields dinamically limit flux leakage transients, i.e. during the attraction of the armature, due to the eddy currents induced by flux leakage. The shields are designed in order to be coupled with flux leakages and not with the main flux in the magnetic circuit.
IPC 1-7
IPC 8 full level
B41J 2/275 (2006.01)
CPC (source: EP)
B41J 2/275 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0041126 A2 19811209; EP 0041126 A3 19820714; EP 0041126 B1 19841205; DE 3167553 D1 19850117; IT 1131146 B 19860618; IT 8021815 A0 19800506
DOCDB simple family (application)
EP 81103083 A 19810424; DE 3167553 T 19810424; IT 2181580 A 19800506