EP 0845355 B1 20020417 - ELECTRO-COAGULATION PRINTING APPARATUS
Title (en)
ELECTRO-COAGULATION PRINTING APPARATUS
Title (de)
VORRICHTUNG ZUM DRUCKEN MITTELS ELEKTROKOAGULATION
Title (fr)
APPAREIL D'IMPRESSION PAR ELECTROCOAGULATION
Publication
Application
Priority
- CA 2178679 A 19960610
- JP 9701996 W 19970610
Abstract (en)
[origin: CA2178679C] An electrocoagulation printing apparatus comprises a positive cylindrical electrode having a central longitudinal axis extending horizontally and a passivated surface defining a positive electrode active surface, the positive electrode being formed of an electrolytically inert metal; a drive mechanism for rotating the positive electrode about the longitudinal axis thereof at a substantially constant speed; a coating device for coating the positive electrode active surface with an olefinic substance and a metal oxide to form on the surface micro-droplets of olefinic substance containing the metal oxide; and a printing head for forming on the olefin and metal oxide-coated positive electrode active surface a plurality of dots of colored, coagulated colloid by electrocoagulation of an electrolytically coagulable colloid in the presence of a coloring agent, the dots of colored, coagulated colloid being representative of a desired image. The apparatus of the invention further comprises a transfer device for bringing a substrate into contact with the dots of colored, coagulated colloid to cause transfer of the colored, coagulated colloid from the positive electrode active surface onto the substrate and thereby imprint the substrate with the image; and a cleaning device for cleaning the positive electrode active surface to remove therefrom any remaining coagulated colloid, the cleaning device being disposed under the positive electrode and below the coating device. Such an apparatus is capable of printing images of high definition.
IPC 1-7
IPC 8 full level
B41J 2/005 (2006.01)
CPC (source: EP)
B41J 2/005 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
CA 2178679 A1 19971211; CA 2178679 C 19990831; AU 2980897 A 19980107; AU 713694 B2 19991209; CN 1195319 A 19981007; DE 69712025 D1 20020523; DE 69712025 T2 20030102; EP 0845355 A1 19980603; EP 0845355 A4 19990728; EP 0845355 B1 20020417; KR 19990036297 A 19990525; NZ 329758 A 19990629; WO 9747474 A1 19971218
DOCDB simple family (application)
CA 2178679 A 19960610; AU 2980897 A 19970610; CN 97190683 A 19970610; DE 69712025 T 19970610; EP 97924377 A 19970610; JP 9701996 W 19970610; KR 19980700965 A 19980209; NZ 32975897 A 19970610