Abstract: A system for efficiently feeding normal sized and oversized documents into different imaging positions overlying an imaging platen. All documents are initially fed onto the platen from an infeeding position desirable for normal documents substantially downstream from the upstream end of the platen. A normal document is only fed unidirectionally downstream into an imaging position. A sensed oversized document is initially fed downstream, but then, after its trail edge has cleared the infeeding position, it is reverse fed towards the upstream end of the platen into a imaging position partially overlying the normally unused upstream portion of the platen. A baffle normally directly overlies that area of the platen. During the initial reverse movement of an oversized document has baffle is pivoted upwardly at its downstream edge, at the infeeding position, to provide a document guide surface under the baffle.

Abstract: An automatic electrostatographic duplicating machine in which computer fanfold documents are fed by an automatic handling means from a supply position above the machine platen to a second position overlaying the platen below the supply position by a tractor means having motor driven sprocket means operative to advance the document material, and control means for supplying control signals to said motor driven means to advance the document material continuously, intermittently, or to selected positions.

Abstract: An imaging lens system for electrostatic type reproduction machine or copiers utilizing a zoom lens effective to provide, within the magnification limits of the lens, infinitely variable image sizes.A control is provided to pre-set the lens to automatically give, upon actuation, at least one preselected image size, with an override control to enable the lens to be set to provide any image size regardless of pre-set conditions.Further controls are provided for the machine nonimage erase mechanism to automatically compensate for changes in the image borders brought about by changes in image size due to resetting of the zoom lens. For this purpose, an infinitely variable edge fadeout apparatus is provided incorporating movable shutters to vary the effective size of the edge erasure slots in correspondence with image size together with timing controls for changing the operational timing of the pitch fadeout lamp in response to changes in image size upon resetting of the zoom lens.

Abstract: An automatic electrostatographic duplicating machine in which computer fanfold documents are fed by an automatic handling means from a supply position above the machine platen to a second position overlaying the platen below the supply position by a tractor means having motor driven sprocket means operative to advance the document material, and control means for supplying control signals to said motor driven means to advance the document material continuously, intermittently, or to selected positions.