Global patent index - EP 1013429 A2

EP 1013429 A2 2000-06-28 - 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

EP 1013429 A2 (EN)

Application

EP 99305770 A

Priority

JP 37103398 A

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 (main, further and additional classification)

B41J 2/14

IPC 8 full level (invention and additional information)

B41J 2/045 (2006.01); B41J 2/055 (2006.01); B41J 2/14 (2006.01); H01L 41/09 (2006.01)

CPC (invention and additional information)

B41J 2/045 (2013.01); B41J 2/055 (2013.01); B41J 2/14 (2013.01); H01L 41/09 (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

EPO simple patent family

EP 1013429 A2 20000628; EP 1013429 A3 20010314; CN 1258600 A 20000705; JP 2000190492 A 20000711; JP 4300610 B2 20090722

INPADOC legal status

2001-11-21 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20010924

2001-07-18 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20010521

2001-03-14 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI

2000-06-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-06-28 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI