Paper feeder comprising a selectively drivable resilient body in frictional contact with a feed roller

Claim 1

A paper feeder for feeding various types of sheets of paper, one at a time, from a platform to a utilization device, said feeder comprising a feed roller rotatable around a fixed axis, first drive means for driving said roller in a first sense of rotation, a resilient body movable along a circumferential area of said feed roller in frictional contact therewith, second drive means for controllably driving said resilient body when operatively coupled thereto, and manually operable selection means for selectively operably coupling said second drive means and said resilient body in a first state to positively drive said resilient body in a second sense at said area when said sheet is of a predetermined nature and for selectively operably decoupling said second drive means and said resilient body when said sheet of paper is of a different nature, said first sense being a sense of feeding said sheet from said platform to said utilization device, said second sense being a reversed sense, wherein said manually operable means is further operative for selectively operably coupling said second drive means and said resilient body in a second state to positively drive said resilient body in said first sense at said area when said sheet comprises a ground sheet and another sheet attached thereto.