EP 0982134 A2 20000301 - Head diagnosis apparatus and head diagnosis method for printer
Title (en)
Head diagnosis apparatus and head diagnosis method for printer
Title (de)
Kopfdiagnosevorrichtung und Verfahren für Drucker
Title (fr)
Appareil et procédé pour le diagnostic de défauts d'une tête imprimante
Publication
Application
Priority
JP 21417998 A 19980729
Abstract (en)
In a head diagnosis apparatus and the head diagnosis method for diagnosing the condition of a thermal head (1; 23), after measuring the resistance value of a plurality of heat generation resistive elements (93) arranged on a head surface of the thermal head, a change amount of the resistance value of each heat generation resistive element (93) is calculated on the basis of the resistance value of each heat generation resistive element (93) measured in the past and the resistance value of each heat generation resistive element (93) measured at the current time. An electrification state of each heat generation resistive element (93) is judged on the basis of the calculation result, and the thermal head (1; 23) is diagnosed to see whether it is good or bad in accordance with the determination result, thereby permitting the diagnosis on the condition of the thermal head (1; 23) before actually entering a printing stage. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/35 (2006.01); B41J 2/355 (2006.01); B41J 29/393 (2006.01)
CPC (source: EP)
B41J 2/355 (2013.01); B41J 29/393 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0982134 A2 20000301; EP 0982134 A3 20000920; CA 2278881 A1 20000129; CN 1106944 C 20030430; CN 1243068 A 20000202; JP 2000043307 A 20000215
DOCDB simple family (application)
EP 99114794 A 19990728; CA 2278881 A 19990726; CN 99111863 A 19990729; JP 21417998 A 19980729