Global Patent Index - EP 1038677 A1

EP 1038677 A1 2000-09-27 - Ink jet print head declogging method and apparatus

Title (en)

Ink jet print head declogging method and apparatus

Title (de)

Verfahren und Vorrichtung zur Entstopfung eines Tintenstrahldruckkopfes

Title (fr)

Procédé et dispositif pour déboucher une tête d'impression à jet d'encre

Publication

EP 1038677 A1 (EN)

Application

EP 00200824 A

Priority

US 27317799 A

Abstract (en)

An ink jet printer includes a piezoelectric print head adapted to eject ink in response to the application of a voltage pulse to a piezoelectric element in the print head. A signal generator produces a printing voltage pulse of a first magnitude for ejecting a printing drop of ink from the print head, and an unclogging voltage pulse of a second magnitude greater than the first for unclogging the print head. A controller selectively applies the printing voltage pulse or the unclogging voltage pulse to the print head. <IMAGE>

IPC 1-7 (main, further and additional classification)

B41J 2/165

IPC 8 full level (invention and additional information)

B41J 2/175 (2006.01); B41J 2/045 (2006.01); B41J 2/055 (2006.01); B41J 2/165 (2006.01)

CPC (invention and additional information)

B41J 2/0451 (2013.01); B41J 2/04541 (2013.01); B41J 2/04581 (2013.01); B41J 2/04588 (2013.01); B41J 2/16579 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1038677 A1 20000927; JP 2000272146 A 20001003

INPADOC legal status


2007-03-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20061003

2001-06-13 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB

2001-04-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010301

2000-09-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB

2000-09-27 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI