Lift Cams for a Pinwheel Paper Feeder
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
When paper is fed by a pinwheel feeder between a tensioning shaft and a reverse drive roll, which is driven to reverse index the paper, the tensioning shaft is lifted away from the reverse drive roll during feeding by lift cams at opposite ends of the reverse drive roll, which is not driven during feeding. This provides a small clearance to allow the paper to shift side to side and align itself when being fed by the pinwheel feeder. When a sheet of paper 1 is fed by pinwheel feeders, any walking of the paper 1 from side to side causes one side or the other of the paper 1 to jam into one of a pair of guides 2 (one shown) on the pinwheel housing to increase the loading on the holes in the paper 1 for the pinwheels until the paper 1 becomes skewed and tears out of the pinwheels.