Abstract: A readout system includes a source of illumination that is propagated along a predetermined path. Disposed in that path is a medium, such as a microform which carries a chart recording. An imaging screen is located in a portion of that path beyond the medium, and a projection lens system is adjustable to focus the image upon the screen. Also included is an image storage element disposed in a portion of the path of the illumination beyond the medium. The medium is moved along a given path which results in the sweeping of the image across the screen and also in the presenting of a moving section of the image in a discrete path to the storage element. The storage element in this case is the electrostatic drum of a xerographic copying machine. The length of the path is adjusted by means of interposing first and second reflectors mutually inclined at a reverse angle of forty-five degrees. Adjustment of the distance between those mirrors changes the path length.

Abstract: The disclosure describes an illumination apparatus for a xeroxgraphic copy machine which produces a copy of an original document. The illumination apparatus comprises a lamp, a shield which surrounds the lamp and has at least one aperture enabling the lamp to illuminate the original document, and at least one filter disposed between the lamp and the document for selectively controlling the intensity or wave length of the light radiated to the document. Preferrably, the illumination apparatus comprises at least two aperatures in the shield and at least two transmissively dissimilar filters, and a control apparatus, such as a control knob, belt and pulley, for selectively disposing the filters between the lamp and the original document.

Abstract: The roller transfer corona is an apparatus which eliminates the problem of image voids which exists when folded or creased paper is used as the copy paper in a xerographic copy machine. The apparatus comprises contact means, such as a coated push roller, for physically engaging and forcing the folded copy paper against the photoconductor element of the copy machine in combination with corona means, such as a corona wire, located adjacent to and separate from the contact means, for effecting the transfer of toner particles from the photoconductor element to the copy paper.