Patent ID: 6943316
Filing Date: 2005-09-13
Classification: H05H

Abstract:
1. An arrangement for generating a chemically active jet (active gas jet) by a plasma generated by electric discharge in a utilized process gas comprising: an essentially cylindrical discharge chamber through which process gas flows and in which plasma is generated due to an electric gas discharge for activating the process gas; a gas inlet for continuously feeding the process gas into the discharge chamber; and an outlet opening for directing the active gas jet to a surface to be treated; said discharge chamber having a conically narrowed end for increasing the velocity of the gas being activated in a discharge zone inside the discharge chamber; a limiting channel for preventing propagation of the discharge zone into the free space for the surface to be treated being arranged following the narrowed end of the discharge chamber; said limiting channel being essentially cylindrical and not divergently shaped and being grounded and having its length being greater than its cross section by a factor of 5-10.