Abstract: 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 por

Abstract: The present disclosure is directed to electrostatic recording devices wherein a latent electrostatic image is recorded on a dielectric coated sheet by a stylus array spaced apart from the sheet to form an ionization gap. There is now taught a means to accurately establish the distance between the recording stylus and the dielectric surface upon which the latent image is created. A dielectric sheet containing a conductive layer is passed over a fixed recording head containing an array of styli. The fixed recording head is provided with a source of fliuid which maintains positive pressure in a cavity with the recording head, which cavity has outlets facing the dielectric sheet passing over the head. The length of the gap between the dielectric sheet and the recording head is maintained by the fluid pressure emanating from the head.