COROTRON SHIELD AND CATALYTIC FILTER
Original Publication Date: 1978-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Xerox Disclosure Journal
This proposal is directed to an improved corona discharge device having incorporated within its field a nickel hydroxide catalyst. It is well known that the production of a corona discharge in air usually generates ozone which adversely affects uniform charging and which, even in very small quantities, is con-sidered toxic to humans. Ozone emissions in an environment are generally controlled by "filtering" devices which are impregnated with catalysts capable of conversion of the ozone to relatively harmless substances. Ozone "filtering" devices for electrostatographic copiers have been located in the copier exhaust stream. These devices are generally charac-terized as fixed head devices; that is, the catalysts are impregnated into a porous support which is integrated within the copier exhaust housing as disclosed in IBM Technical Disclosure Bulletin, Vol. 11:8, January 1969. Alternatively, the catalysts have been incorporated in the corona discharge electrode structure itself as described in U.S. Patent 3,675,096.