Imaging system with a plurality of document registration positions

Claim 1

A imaging system for a document reproduction machine including: a transparent platen for supporting a document to be reproduced, said platen having at least a first and second document registration edge and an associated first and second corner registration position associated with a first and second mode of operation; sensing means for generating an electrical signal indicative of the presence of a document aligned with said at least first or second registration edge; means for generating an electrical signal indicative of a desired magnification value for the document to be reproduced; an optical system for flash illuminating said document and for forming latent images of said document on a photosensitive surface, said optical system including a projection lens adapted for three dimensional movement; and control means adapted to receive said electrical signals corresponding to a registrated document and said magnification values, and to position said lens, prior to document illumination so as to maintain one edge of a projected image along a common registration line parallel to one edge of photoreceptor through a magnification range and through said operational mode changes.