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

1977-08-10

1979-01-16

Anderson, Bruce C.

Radiant energy

Corona irradiation

Charging of moving object

250324, H01T 1904

Patent

active

041350855

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.

REFERENCES:
patent: 2778946 (1957-01-01), Mayo
patent: 3638016 (1972-01-01), Frank
patent: 3678350 (1972-07-01), Matsumoto et al.
patent: 3744898 (1973-07-01), Kurahashi et al.
patent: 3778622 (1973-12-01), Kobayashi et al.
patent: 3797927 (1974-03-01), Takahashi et al.

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