Global Patent Index - EP 0988977 A1

EP 0988977 A1 2000-03-29 - Ultrasonic cleaning of ink jet printhead cartridges

Title (en)

Ultrasonic cleaning of ink jet printhead cartridges

Title (de)

Ultraschall-Reinigung von Tintenstrahldruckkopfpatronen

Title (fr)

Nettoyage par ultrasons des cartouches de tête d'impression à jet d'encre

Publication

EP 0988977 A1 (EN)

Application

EP 99202982 A

Priority

US 15972598 A

Abstract (en)

Ink jet printing apparatus for receiving an ink cartridge (72,74,76,78) defining an orifice structure having at least one orifice plate (72a,74a,76a,78a) with a plurality of nozzles for ejecting ink droplets onto a receiver to form an image, cleaning of the orifice structure of debris is providing by at least one actuable ultrasonic transducer (81,82,83,84) operatively associated with and spaced from the nozzles; and a thin layer (meniscus) of viscous fluid (81a,82a,83a,84a) provided between and in contact with the ultrasonic transducer and the orifice plate to transmit the ultrasound energy through that fluid media. The actuable ultrasonic transducer produce ultrasonic sound waves which pass through the thin viscous fluid layer and impinge upon the orifice structure and dislodges debris. <IMAGE>

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

B41J 2/165

IPC 8 full level (invention and additional information)

B41J 2/165 (2006.01)

CPC (invention and additional information)

B41J 2/16544 (2013.01); B41J 2/16552 (2013.01); B41J 2002/16567 (2013.01)

Citation (search report)

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 0988977 A1 20000329; JP 2000094702 A 20000404

INPADOC legal status


2001-10-11 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

- Ref Legal Event Code: 8566

2001-09-05 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20000930

2000-12-13 [AKX] PAYMENT OF DESIGNATION FEES

- Ref Legal Event Code: AKX

2000-03-29 [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

2000-03-29 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

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