A sheet supply apparatus for supplying stacked sheets includes a standard sheet tray provided with a standard side guide that regulates a position in the width direction of the stacked sheet, and an extension sheet tray extendably disposed upstream of the standard sheet tray in a sheet feeding direction,...http://www.google.com.au/patents/US6916020?utm_source=gb-gplus-sharePatent US6916020 - Sheet supply apparatus and sheet handling apparatus using the same
