(19)
(11) EP 0 888 889 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.06.1999 Bulletin 1999/25

(43) Date of publication A2:
07.01.1999 Bulletin 1999/01

(21) Application number: 98112209.6

(22) Date of filing: 02.07.1998
(51) International Patent Classification (IPC)6: B41J 2/14
(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: 03.07.1997 US 887921

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

(72) Inventors:
  • Komplin, Steven Robert
    Lexington, Kentucky 40515 (US)
  • Murthy, Ashok
    Lexington, Kentucky 40515-1202 (US)

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

   


(54) Printhead having heating element conductors positioned in spaced apart planes


(57) A printhead is provided comprising a plate having a plurality of orifices through which ink droplets are ejected and a heater chip coupled to the plate. The heater chip includes at least one heating element provided on a main body portion of the heater chip. The main body portion includes at least one first conductor and at least one second conductor. The first and second conductors contact the heating element and provide energy to the heating element. At least one section of the first conductor is positioned in a first plane and at least one section of the second conductor is positioned in a second plane which is vertically spaced from the first plane.






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