Paddle wheel retard feeder
AssigneeXerox Corporation
InventorMorton Silverberg
Life of this patent
Estimating the term…
Abstract
An apparatus for feeding individual substrates from the top of a stack of substrates upon demand includes a first paddle wheel mounted above the substrate stack and adapted to forward a substrate from the stack in a predetermined direction and a second paddle wheel downstream from the first paddle wheel that is adapted to continue movement of the substrate in the predetermined direction. A friction retard roller is positioned opposite to and forms a nip with the second paddle wheel in order to inhibit multi-feeding of substrates. A second embodiment includes a single paddle wheel that acts in combination with a high friction surfaced guide member to feed substrates individually from a stack.
Claims2
A substrate sheet feeding apparatus, comprising:
- at least one high friction tipped member movable in a path so as to intersect with the plane of a substrate to be fed and apply a normal force thereto;
- means for moving said high friction tipped member through said path;
- and
- intercept means for relieving said normal force after the initial contact of said friction tipped member with said substrate by lifting said friction tipped member out of contact with said substrate sheet before said normal force reaches a maximum value.
Dependencies are inferred from the claim text.