EP 0366981 B1 19940209 - Matrix printer actuator.
Title (en)
Matrix printer actuator.
Title (de)
Betätigungsvorrichtung für einen Matrixdrucker.
Title (fr)
Dispositif actionneur pour imprimante matricielle.
Publication
Application
Priority
US 26453588 A 19881031
Abstract (en)
[origin: EP0366981A2] An impact printer is described which includes a shock wave generator means (10), a print hammer (30), and a solid wave guide (28) interposed between the shock wave generator and print hammer (30). The solid wave guide (28) acts to transmit a shock wave from the shock wave generator to the print hammer (30) to cause its movement towards a substrate upon which printing is to occur. In a preferred embodiment, the shock wave generator comprises a piezoelectric or electrostrictive actuator, which actuator is held in compression by a frame (12, 26) that prevents any substantial longitudinal movement thereof. In a further preferred embodiment, circuitry is connected to the actuator for detecting, after an actuation, the return of the hammer (30) into contact with the solid wave guide (28). In response to that detection, the circuitry provides a signal (80) which enables operation of the shock wave generator.
IPC 1-7
IPC 8 full level
B41J 2/295 (2006.01)
CPC (source: EP)
B41J 2/295 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0366981 A2 19900509; EP 0366981 A3 19900919; EP 0366981 B1 19940209; DE 68913005 D1 19940324; DE 68913005 T2 19940804; JP H02130154 A 19900518
DOCDB simple family (application)
EP 89118784 A 19891010; DE 68913005 T 19891010; JP 20711689 A 19890811