EP 0462684 B1 19940615 - Needle matrix print head.
Title (en)
Needle matrix print head.
Title (de)
Matrixnadeldruckkopf.
Title (fr)
Tête d'impression à matrice d'aiguilles.
Publication
Application
Priority
DE 4020010 A 19900621
Abstract (en)
[origin: EP0462684A1] In a matrix needle printhead (1), in each case electromagnetic drives (5) are provided for each print needle (3) for longitudinal movements and in order to produce guide mouthpieces (9) which can be moved backwards and forwards and up and down for high-speed or letter quality printing, a lifting magnetic device (10) serving for two defined limit positions of a magnetic armature (11). <??>In order to accommodate the lifting magnetic device in the smallest possible space, that is to say compactly, and to improve the switching frequency, it is proposed that the lifting magnetic device (10) be arranged and mounted in its entirety in a region (15) which is immediate with respect to the guide mouthpiece (9) and has a magnetic yoke (17) with two or more magnetic poles (18, 19), it being possible to move an armature body (21) backwards and forwards or up and down between the matching distance (20) of two magnetic poles (18, 19) of different polarity, by switching on and off or by reversing the polarity of the switched-on lifting magnetic coil (22) and the guide mouthpiece (9) being mounted on the guided armature body (21). <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/255 (2006.01); B41J 2/265 (2006.01)
CPC (source: EP US)
B41J 2/255 (2013.01 - EP US); B41J 2/265 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0462684 A1 19911227; EP 0462684 B1 19940615; AT E107232 T1 19940715; DE 4020010 A1 19920109; DE 4020010 C2 19920416; DE 59101921 D1 19940721; JP H04232758 A 19920821; US 5215390 A 19930601
DOCDB simple family (application)
EP 91250115 A 19910425; AT 91250115 T 19910425; DE 4020010 A 19900621; DE 59101921 T 19910425; JP 16946891 A 19910614; US 71925691 A 19910621