(19)
(11) EP 1 285 748 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.05.2004 Bulletin 2004/19

(43) Date of publication A2:
26.02.2003 Bulletin 2003/09

(21) Application number: 02017610.3

(22) Date of filing: 05.08.2002
(51) International Patent Classification (IPC)7: B41C 1/10
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 17.08.2001 CA 2355458

(71) Applicant: Toyo Ink Manufacturing Co. Ltd.
Tokyo 104-0031 (JP)

(72) Inventors:
  • Castegnier, Adrien
    Outremont, Quebec, Canada H2V 2Z2 (CA)
  • Castegnier, Guy
    Quebec, Canada H3E 1L1 (CA)

(74) Representative: Koepe, Gerd L., Dipl.-Chem. 
Koepe & Partner, Patentanwälte, Postfach 22 12 64
80502 München
80502 München (DE)

   


(54) Electrocoagulation printing method and apparatus providing color juxtaposition


(57) A polychromic image is reproduced and transferred onto a substrate (26) by (a) providing a positive electrolytically inert electrode (10) having a continuous passivated surface (12) moving at constant speed; (b) coating the positive electrode active surface with an olefinic substance; (c) forming on the olefin-coated positive electrode surface a plurality of colored pixels representative of a desired polychromic image and each pixel comprising juxtaposed dots of differently colored, coagulated colloid, by electrocoagulation of a colloid present in an electrocoagulation printing ink; and (d) bringing a substance (26) into contact with the colored pixels to cause transfer of the colored pixels from the positive electrode surface onto the substrate and thereby imprint the substrate with the polychromic image.






Search report