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


EP 1038677 A1 (EN)


EP 00200824 A


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)


DOCDB simple family

EP 1038677 A1 20000927; JP 2000272146 A 20001003