Boris J Kirsanoff

US Patent:

41350855, Jan 16, 1979

Filed:

Aug 10, 1977

Appl. No.:

5/823452

Inventors:

Robert D. Payne - Countryside IL
Boris J. Kirsanoff - Darien IL

Assignee:

The Continental Group, Inc. - New York NY

International Classification:

H01T 1904

US Classification:

250325

Abstract:

An apparatus for providing a uniform charge upon a surface of a conductive base, the apparatus includes a longitudinally elongated corona discharge element, a potential source connected to the discharge element for applying a corona-generating potential, conveyor means for conveying at least one conductive base along a path in a direction along the length of the discharge element and a protective grid assembly disposed directly adjacent the discharge element. The grid assembly includes protective elements having sufficient resistance to prevent the conveyed base from contacting the discharge element and to cast a persistent electrical shadow on the conveyed base. The protective elements are skewed longitudinally of the discharge element and relative to the direction of the conveyed base whereby the electrical shadow cast by the protective element is equally distributed over the conveyed base.