Abstract: The description deals with a process of duplicating page order sheets designed to greatly augment the output of existing office duplicators by preparing masters each of which carries the image of two pages of data. The master is placed on the cylinder with the page lengths axially disposed and the page widths peripherally disposed, and prints on long sheets each of which carries two pages of data side by side, each being placed in successive pockets of a collator. The stack of printed sheets in each pocket is then placed in a paper stack cutter and cut into two stacks of standard sized sheets. The present invention relates to the discovery that a certain page order sequence of originals can be devised which will allow the whole process to proceed in an orderly routine manner, materially simplifying the procedure for the operator.