Multi Function Restraining Knife
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
It is known in the paper-handling art to shingle a stack of sheets in a first direction to remove the uppermost sheet from the control of the restraining knife and to then reverse the direction of the shingler or other picker/separator to feed the released sheet to a printer or the like. It has been customary to have a trailing edge detector or sensing means located at the opposite end of the stack from the restraining knife. While the position of the sensor may be adjustable, for a given stack it is usually fixed, requiring that all sheets in the stack be the same length. What is shown and described here is a leading edge sensor which enables sheets of varying lengths to be interspersed in the same stack.