Charging device for basecoat charging of can ends

Details Charging device for basecoat charging of can ends Charging device for basecoat charging of can ends

C - Chemistry, Metallurgy

25

D

317/3.4

C25D 13/14 (2006.01) B05B 5/053 (2006.01) B05B 5/08 (2006.01)

Patent

CA 1103751

ABSTRACT OF THE DISCLOSURE An apparatus for providing a uniform charge upon a surface of a conductive base, the apparatus includes a longitudinally elongated corona discharge element, a poten- tial 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 case a per- sistent electrical shadow on the conveyed base. The pro- tective 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 ele- ment is equally distributed over the conveyed base.

308885

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