EP 1013429 A2 20000628 - Ink jet printer head and printer apparatus
Title (en)
Ink jet printer head and printer apparatus
Title (de)
Tintenstrahldruckkopf und Druckvorrichtung
Title (fr)
Tête d'imprimante à jet d'encre et imprimante
Publication
Application
Priority
JP 37103398 A 19981225
Abstract (en)
A piezo-electric reinforcing member surrounding a plurality of pressure generating units is formed in a thin vibrating chromium film membrane. The reinforcing member is not discrete but continuous with respect to a region of the membrane enclosing the pressure generating units. Within the membrane, thermal stress as well as stress caused by differences in the crystal structure of the piezo-electric member and the chromium film arise. The mechanical strength of the reinforcing member itself restrains the shrinkage of the vibrating membrane caused by the internal stress, thereby preventing cracks from occurring in the vibrating membrane. Likewise, the ends of the pressure generating components as well as the individual electrodes are shaped so as to make it difficult for stress to accumulate thereat, thereby also preventing cracks from occurring in the vibrating membrane. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/045 (2006.01); B41J 2/055 (2006.01); B41J 2/14 (2006.01); H10N 30/20 (2023.01)
CPC (source: EP)
B41J 2/14233 (2013.01); B41J 2/161 (2013.01); B41J 2/1626 (2013.01); B41J 2/1631 (2013.01); B41J 2/1635 (2013.01); B41J 2002/14491 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1013429 A2 20000628; EP 1013429 A3 20010314; CN 1258600 A 20000705; JP 2000190492 A 20000711; JP 4300610 B2 20090722
DOCDB simple family (application)
EP 99305770 A 19990721; CN 99118344 A 19990831; JP 37103398 A 19981225