Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Dicorotron devices have been used to perform negative charging functions in an electrophotographic environment. A corona wire is coated with a dielectric material and excited by an AC voltage capacitively coupled to the air across the dielectric sheath. A net DC current to the surface to be charged is obtained by applying a DC bias to the surrounding corona shield. The only dielectric coating found to date capable of withstanding the corrosive attack of the corona products is glass. Glass is so brittle, however, in a thin coating on a flexible wire that it requires a means of firm support to keep it from cracking in shipment and in use. One approach has been to cement the dicorotron wire to the edge of a glass slide.