PADDLE WHEEL FEEDER
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A paddle wheel feeder 200 is disclosed in Figures 1 and 2 that employs a single paddle wheel 205 that has blades or paddles 210 attached thereto. Prior paddle wheel inertial feeders relied only on the inertia of the sheets of paper, paddle to paper and paper to paper friction. This improvement has the ability to handle differential intersheet friction and comprises a paddle wheel 205 in conjunction with an additional guide member 220 that has a friction surface 221. The friction surfaced guide member 220 is positioned adjacent the lead edge of the stack and the paddle wheel 205 is critically positioned so that the axis of hub or shaft 206 is in front of the lead edge of the stack with the stack height on platform 31 being controlled relative to the frictional guide surface by conventional means, such as a tray elevator or a simple mechanically controlled escapement system. Also, the friction surface 221 is preferably of a material such as cork that has a coefficient of friction against paper that is less than the paddle wheel to paper friction coefficient but greater than paper to paper friction.