EP 0110020 B1 19890308 - CHARACTER PRINTING DEVICE FOR A TYPEWRITER OR THE LIKE
Title (en)
CHARACTER PRINTING DEVICE FOR A TYPEWRITER OR THE LIKE
Publication
Application
Priority
DE 3244936 A 19821204
Abstract (en)
[origin: US4842429A] A type face striking system for striking a type face to produces an imprint on a record carrier in a writing machine, the system including; an electromagnetically actuatable printing hammer movable under the influence of an electrically generated magnetic field between a rest position and a striking position for striking the type face; an actuating device including a magnetic field producing means in the form of a conductor coil connected for receiving an operating voltage for producing the electrically generated magnetic field; and a control unit connected to the coil and operative for successively applying thereto: a voltage pulse of a first polarity for causing the actuating device to produce a magnetic field which effects movement of the hammer from its rest position to its striking position; and a voltage pulse of a second polarity, opposite to the first polarity, for causing the actuating device to produce a magnetic field which effects movement of the hammer from its striking position toward its rest position.
IPC 1-7
IPC 8 full level
B41J 9/14 (2006.01); B41J 9/24 (2006.01); B41J 9/38 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0110020 A2 19840613; EP 0110020 A3 19860108; EP 0110020 B1 19890308; DE 3244936 A1 19840607; DE 3379324 D1 19890413; JP S59155074 A 19840904; US 4842429 A 19890627
DOCDB simple family (application)
EP 83108455 A 19830827; DE 3244936 A 19821204; DE 3379324 T 19830827; JP 21639283 A 19831118; US 55803183 A 19831205