Corona discharge surface treating device

Details Corona discharge surface treating device Corona discharge surface treating device

H - Electricity

01

T

H01T 19/00 (2006.01) B29C 59/10 (2006.01) B29C 59/12 (2006.01)

Patent

CA 2081157

Device for surface treatment by corona discharge. Device for surface treatment by corona discharge comprising: - a closed reaction housing in which the said object to be treated can travel along an axis of travel, - an electrode with a potential appropriate for treatment, - a counter electrode with a lower potential in absolute value than that of the said electrode, the said counter electrode surrounding the said axis of travel and the said electrode and counter electrode being arranged so as to create in the vicinity of the said axis of travel a plasma zone in which the said corona discharge occurs, - at least one passage provided in the said housing to deliver a reactive plasma gas for the treatment, distinctive in that the said electrode (4) has a plurality of portions with a low radius of curvature, that is to say, with ends sharpened or pointed, directed towards the said axis of travel (X) and arranged so that the extensions of their lower radius of curvature ends on an orthogonal plan at the said axis of travel (X) surrounds the extension on the said plan of the external contour of the said object to be treated (F) as well as that of the said axis of travel (X).

Dispositif de traitement de surface par décharge couronne. Dispositif de traitement de la surface d'un corps par décharge couronne comprenant : - une enceinte de réaction fermée dans laquelle peut défiler ledit corps à traiter le long d'un axe dit de passage, - une électrode portée à un potentiel dit de traitement, - une contre-électrode portée à un potentiel inférieur en valeur absolue à celui de ladite électrode, ladite contre-électrode entourant ledit axe de passage et lesdites électrode et contre-électrode étant disposées de manière à définir au voisinage dudit axe de passage une zone dite plasmagène dans laquelle se produit ladite décharge couronne, - au moins un passage ménagé dans ladite enceinte pour l'amenée d'un gaz réactif plasmagène destiné au traitement, caractérisé en ce que ladite électrode (4) est munie d'une pluralité de portions de faible rayon de courbure, c'est-à-dire ayant des extrémités effilées ou pointues, orientées vers ledit axe de passage (X) et disposées de sorte que les projections de leurs extrémités de faible rayon de courbure sur un plan orthogonal audit axe de passage (X) entourent la projection sur ledit plan du contour externe dudit corps à traiter (F) ainsi que celle dudit axe de passage (X).

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