is fixed to the upper surface of the standards 28 and it has a pair of spaced slots 54 through which the handle legs pass with the back wall of the slots serving to prevent the cam from being driven in a direction reverse to that for proper perforation and crimping the splicing jig 18 comprises two pair of bullet nosed locating pins 56 58 60 and 62 with one pair of pins 56 and 58 spaced from the other pair of pins 60 and 62 by a distance sufficient to accommodate the edges of two stacks as indicated by the lines 12 and 12a in fig2 and 3 the pins 58 and 62 are carried in a block 64 having dovetail edges for receipt in a dovetail guide 66 formed in plate 14 to permit longitudinal adjustment of pins 58 and 62 relative pins 58 and 60 under control of a stop nut 68 the block 64 is reversible in the guide 66 for positioning pins 58 and 62 to receive either the 81 2 inch or 11 inch edge of the forms respectively in operation a stack 12 is formed by collating a desired number of business forms or papers of selected thickness at various positions in the stack which is appropriately interleaved with carbon paper if the forms do not carry reproducing means the stack which may contain as many as fifteen forms and fourteen carbons is inserted beneath.