the left side of which there is a vertically disposed side plate 42 having the usual chain attach lever 29 for connection and movement of carriage 18 longitudinally on chassis 12 the general framework of carriage 18 consists of left side plate 42 and right side plate 44 which are vertically disposed substantially parallel to one another inward of the opposed longitudinal sides of chassis 12 right side plate 44 serves in part as a site for mounting rollers 22 which travel in right chassis channel 20 and left side plate 42 serves in part in a somewhat related manner as will be described side plates 42 44 are connected by a strong rigid bar 45 fixed adjacent to the corresponding forward edges of the side plates on the inside surfaces thereof bar 45 is disposed horizontally with relation to the longitudinal axis of device 10 and with relation to the line of travel of carriage 18 the forward inside upper corner of plate 42 is connected at a substantially central location on transversely fixed bar 45 by a diagonally disposed rigid bar 47 for structural reinforcement of carriage 18 the lower inside rear corner of side plate 42 has mounted thereon a pin lift actuator bar 45 which extends sufficiently forwardly of plate 42 to contact a switch on the printing press and actuate lifting of pins which push the printed stock upwardly for access by.