Global Patent Index - EP 1013432 A2

EP 1013432 A2 2000-06-28 - Cooling of high voltage driver chips

Title (en)

Cooling of high voltage driver chips

Title (de)

Kühlung von Hochspannungstreiberchips

Title (fr)

Refroidissement de puces de circuit de commande à haute tension

Publication

EP 1013432 A2 (EN)

Application

EP 99309507 A

Priority

US 21125198 A

Abstract (en)

A compact cooling technique is provided for cooling an ink jet printer or printhead electronics. A cooling plate (18) is held in good thermal contact to the integrated circuits (12) to be cooled. Fluid passing through the cooling plate then cools the electronics. The cooling plate is typically an aluminum plate embedded with thin walled stainless steel tubing through which fluid flows to provide cooling. The cooling plate has a compliant pad (26) which is thermally conductive, and electrically insulated. The plate and pad combination is held against the integrated circuits for controlling the high voltage to the charging electrodes, which are mounted on the charge driver board. The integrated circuit is packaged in a cavity down ball grid array (BGA) package which provides low thermal resistance to the cooling plate. Variations in the height of the charge driver chips is compensated for by the compliant thermal pad. The fluid is routed through the printhead frame into the cold plate where heat is transferred to the fluid which returns to the printhead frame to exit the printhead. The fluid is ported into the printhead to where the drops will be generated. <IMAGE>

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

B41J 2/14; B41J 2/02; B41J 2/07

IPC 8 full level (invention and additional information)

B41J 2/175 (2006.01); B41J 2/02 (2006.01); B41J 29/377 (2006.01)

CPC (invention and additional information)

B41J 29/377 (2013.01); B41J 2/02 (2013.01); B41J 2202/08 (2013.01)

Citation (applicant)

None

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1013432 A2 20000628; EP 1013432 A3 20000830; CA 2292046 A1 20000614; JP 2000218828 A 20000808

INPADOC legal status


2009-08-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20090227

2007-10-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20071001

2004-06-30 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: EASTMAN KODAK COMPANY

2001-05-16 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB

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

- Effective date: 20010221

2000-08-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

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

2000-08-30 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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

2000-08-30 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7B 41J 2/14 A, 7B 41J 2/02 B, 7B 41J 2/07 B, 7B 41J 29/377 B

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

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB

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

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