(19)
(11) EP 0 890 439 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.08.1999 Bulletin 1999/34

(43) Date of publication A2:
13.01.1999 Bulletin 1999/02

(21) Application number: 98112684.0

(22) Date of filing: 09.07.1998
(51) International Patent Classification (IPC)6: B41J 2/05
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 11.07.1997 US 891522

(71) Applicant: Lexmark International, Inc.
Lexington, Kentucky 40550 (US)

(72) Inventors:
  • Anderson, Frank Edward
    Sadleville, Kentucky 40370 (US)
  • Edwards, Mark Joseph
    Lexington, Kentucky 40515 (US)
  • Gibson, Bruce David
    Lexington, Kentucky 40514 (US)
  • Parish, George Keith
    Winchester, Kentucky 40391 (US)

(74) Representative: Dr. Weitzel & Partner 
Friedenstrasse 10
89522 Heidenheim
89522 Heidenheim (DE)

   


(54) Ink jet printhead with an integral substrate heater driver


(57) The invention is directed to an ink jet printer including an electrical circuit providing an output signal. A printhead includes a substrate, a nozzle plate having a plurality of ink emitting orifices, a plurality of jetting heaters respectively associated with the plurality of ink emitting orifices, and at least one substrate heater associated with the substrate. A substrate heater driver is located on and integral with the printhead. The substrate heater driver includes at least one input and at least one energizable output. The at least one input is connected with the electrical circuit and receives a signal corresponding to the output signal from the electrical circuit. One of the energizable outputs is coupled with at least one of the substrate heaters. The substrate heater driver is configured to selectively actuate the at least one substrate heater, dependent upon the received signal.






Search report