Apparatus for surface treatment by corona discharge
US5236536A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/25
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for treating the surface of a body by corona discharge, the apparatus comprising: PA1 a reaction enclosure through which said body to be treated can run along a "through" axis; PA1 an electrode raised to a "treatment" potential; PA1 a counter-electrode raised to a potential that is lower in absolute value than the potential of said electrode, said counter-electrode surrounding said through axis and said electrode and said counter-electrode together being disposed so as to define a "plasma-generating" zone in the vicinity of said through axis and in which said corona discharge takes place; and PA1 at least one passage formed in said enclosure to feed a plasma-generating reagent gas for treatment purposes; PA1 wherein said electrode is provided with a plurality of portions having small radius of curvature, i.e. having ends that are tapering or pointed, said portions pointing towards said through axis, and being disposed in such a manner that, when projected onto a plane orthogonal to said through axis, their small-radius-of-curvature ends surround the projection onto said plane both of said through axis and of the outline of said body to be treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.