G - Physics – 03 – G
Patent
G - Physics
03
G
204/2, 314/42
G03G 17/02 (2006.01) B41C 1/10 (2006.01)
Patent
CA 1205778
ABSTRACT A method and system for high speed image repro- duction by electro-coagulation of an electrolytically coagulable colloid. A plurality of negative and positive electrolytically inert electrodes which are electrically insulated from one another are arranged to define a matrix of dot-forming elements, the negative and positive electrodes of each matrix element having respective planar active sur- faces with the negative electrode active surface extending in the same plane as the positive electrode active surface and in close proximity thereto. A layer of substantially liquid colloidal dispersion is applied over the negative positive electrode active surfaces of the matrix elements whereby the negative and positive electrode active surfaces are disposed on the same side of the layer of colloidal dispersion, the colloidal dispersion containing an electroly- tically coagulable colloid, a liquid dispersing medium and a soluble electrolyte, and having a substantially uniform temperature throughout the layer. An electrical field is generated between the negative and positive electrodes of selected ones of the matrix elements, the electrical field extending substantially parallel to the planar active surfaces of the negative and positive electrodes, whereby to cause selective coagulation and adherence of the colloid onto the positive electrode active surfaces of the selected matrix elements, thereby forming a series of corresponding dots representative of a desired image, and any remaining non- coagulated colloid is thereafter removed.
454450
Investissements Castegnier Inc./castegnier Holdings Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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