Method and apparatus for registering, feeding and separating original and copy sheets in a duplicator

An apparatus for registering a plurality of thin sheets of material of like size comprising:

• a frame;
• a four-sided carriage for supporting said sheet in superposition thereon, said carriage being mounted for movement on said frame;
• first and second stop means for engaging first and seond sides of said sheets disposed adjacent first and second opposite sides of said carriage, said first stop means comprising a fixed protrusion extending upwardly from said first side of said carriage and said second stop means comprising laterally movable means on the second side of said carriage which is movable toward said fixed protrusion;
• third and fourth stop means for engaging the third and fourth sides of said sheets and disposed adjacent the third and fourth opposite side of said carriage, said third and fourth stop means being movable relative to each other in response to movement of said carriage on said frame;
• and
• camming means on said frame to cause said laterally movable second stop means to move toward the first stop means in response to linear movement of the carriage on the frame, said camming means comprising a linear cam having a recess formed therein and a cam follower on said laterally movable second stop means for riding into, through and out of said recess in said linear cam as said carriage moves on said frame, whereby said laterally movable second stop means is first moved from a rest position toward said first stop means, thereby bringing said sheets into lateral registration and is thereafter retracted to said rest position.