(19)
(11) EP 0 282 207 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.02.1989 Bulletin 1989/06

(43) Date of publication A2:
14.09.1988 Bulletin 1988/37

(21) Application number: 88301676.8

(22) Date of filing: 26.02.1988
(51) International Patent Classification (IPC)4: B41J 29/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 11.03.1987 US 24645

(71) Applicant: Hewlett-Packard Company
Palo Alto, California 94304 (US)

(72) Inventors:
  • Ebersole, Anthony Wayne
    Poway, CA 92064 (US)
  • Beauchamp, Robert W.
    Leucadia, CA 92024 (US)
  • Chuong, Ta C.
    San Diego, CA 92129 (US)

(74) Representative: Colgan, Stephen James et al
CARPMAELS & RANSFORD 43 Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)


(56) References cited: : 
   
       


    (54) Dust shield for a printer


    (57) A dust shield (1) for preventing paper dust from fouling a printer and printhead mechanism is disclosed. In a sprocket-wheel paper drive printer, the sprockets are at least partially encased as they enter and exit the holes in the paper. Paper particles are trapped (7) and then channelled (5) away from mechanisms, such as a thermal ink jet cartridge printhead, whose operation may be detrimentally affected by such dust.







    Search report