(under subclass 68) Implement provided with means to inhibit rearward movement of the piece of material into the support# in response to a force applied to the tool# end of the piece.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71, for an implement with screw-feed means for advancing a piece of material, said means comprising oppositely oriented helices which may function to retard retrograde movement.
80, for an implement including means for advancing a piece of material against the action of a resilient brake, which brake may also serve to prevent retrograde movement of the piece.
83, for an implement including means for advancing a piece of material by direct manual actuation and a latch for the advancing means.
84, for an implement including means for advancing a piece of material by direct manual actuation and including means to prevent the piece from being pushed back into the housing.
