Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A pneumatic paper supply elevator 10 is shown in Figures 1 and 2 that has the advantages of low service requirements, low unit manufacturing cost and a minimum of moving parts. Elevator 10 is constructed to allow frictionless vertical travel by the use of a flexible bellows 12 centered below paper tray 15. Air pressure is supplied to the bellows which causes it to expand and lift the tray. A servomechanism allows the paper stack height to adjust air flow to the bellows. Controlled air flow to the bellows would then maintain the distance between the top of the paper stack and a feed head.