PADDLE WHEEL FEEDER WITH NORMAL FORCE OPTIMIZATION AND BLADE CONTROL
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A paddle wheel feeder 10 is shown in Figure 1 that includes a paddle wheel 12 having a foam hub with at least three blades 13. The integrally molded blades have a high friction surfaced material 14 attached to their sheet contacting tips. The paddle wheel is mounted to be rotatably driven by a shaft 15. The shaft is attached to a Geneva mechanism 20 which in turn is rotatably driven by a motor driven shaft 30. The Geneva mechanism causes the paddle wheel to stop just as one of the blades contacts the top sheet in stack 40 and then proceeds with high acceleration to drive the sheet forward. This acceleration is desirable for insuring that the inertia of all sheets but the sheet being fed prevents the sheets from feeding along with the top sheet. For normal force optimization of blades against the sheet stack, an alternative paddle wheel 100 is shown in Figure 2 that has internal springs 105 located inside each blade 102 of the wheel. A high friction surfaced material 110 is attached to the tips of the blades.