| 摘要 |
An erase device for removing residual charges from the photoreceptor of a xerographic type reproduction machine or printer preparatory to recharging, comprising, an elongated rectangular light conducting bar or fiber adapted for disposition with one side thereof in preset spaced relation to the photoreceptor surface; a light impervious cover about the remaining sides of the fiber to prevent escape of light from the interior thereof; an illumination cavity at one end of the fiber; a lamp in the cavity in operative relationship within the fiber end, the lamp and cavity cooperating so that light is discharged by the lamp into the fiber for transmittal axially within the fiber toward the fiber opposite end, portions of the light in the interior of the fiber escaping through the fiber one side to impinge upon the photoreceptor surface and discharge the photoreceptor; the fiber one side being roughened so that the light exit area progressively increases in proportion to the distance from the lamp, the roughened portion enabling the discharge of light through the fiber one side and providing a proportionally increasing light emitting surface in accommodation of the fall off in light intensity as the distance from the lamp increases. In a second embodiment, the fiber is semi-circular in cross section, the rounded portion of the fiber being covered with a cladding material to prevent the escape of light therefrom while permitting the discharge of light from the uncovered flat portion of the fiber, the fiber being positionable with the flat portion thereof in preset spaced relation to the photoreceptor surface, the surface area of the fiber flat portion being roughened to enable the discharge of light from the fiber and progressively increasing in proportion to the distance from the lamp to accommodate fall off in the intensity of the light discharged from the fiber as the distance from the lamp increases.
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