Charger for electrophotography having a grid assembly
AssigneeHitachi Koki Co., Ltd.
InventorsYasushi Kimiwada, Akira Terakado, Minoru Seino, Yasushi Hashimoto, Koji Kato, Isamu Komatsu
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Abstract
An electrophotographic charger of the type in which a plurality of corona wires extend in the axial direction adjacent to and separated from the surface of a photosensitive drum in order to charge the surface. A plate-like etching grid is interposed between the corona wires and the drum to ensure the charge is uniformly placed on the drum. The grid is divided into a number of individual removable grids so that the distance between each grid and the adjacent corona wire, and the distance between each grid and the drum surface is substantially uniform.
Claims2
An electrophotographic charger for a photosensitive drum, said charger comprising:
- a plurality of corona wires spaced regularly and extending linearly in a longitudinal direction of the photosensitive drum, said corona wires being disposed equidistant, by a predetermined distance, from the surface of the drum;
- and
- a grid assembly comprising a plurality of separately attached, individually removable etching grids, said grid assembly being interposed between said corona wires and the photosensitive drum such that a charge is uniformly spread over a peripheral surface of the photosensitive drum and such that a distance between said grid assembly and said corona wires is substantially uniform over said peripheral surface.
Dependencies are inferred from the claim text.