PURPOSE: To achieve the enhancement of work efficiency and the so-called 3K measure by automating the page missing work separating a product part and a non-drawn out residual part (refuse) in a process printing cardboard and producing a paper box from the printed cardboard through a punching process.

CONSTITUTION: A rotary work stand 14 and the electromotive rotary blade 19 attached to a page missing arm 17 movable in directions horizontal and vertical with respect to the rotary work stand 14 are provided and, further, a vertical position detector 13 detecting the position to the rotary work stand 14 and a mark reading detector 15 reading the mark 21 of the mark sheet 20 placed on the rotary work stand are mounted on the page missing arm 17. The mark 21 of the mark sheet 20 is automatically read to be stored and the electromotive rotary blade 19 is moved to the stored position to perform the page missing work of cardboard 18 to be worked.