Abstract: Printing apparatus which receives printing stock in roll form, withdraws a predetermined amount of material from the roll, cuts the withdrawn material to provide a sheet of stock for printing, and then feeds the sheet to a printer. The printing apparatus can overprint onto sheets which are cut from a roll of preprinted stock, or can print on sheets which are measured and cut from blank roll stock. When used with preprinted stock including a printed material code, the printing apparatus reads the material code to verify that the proper printing stock is being used, and automatically interrupts the printing operation if the proper stock is not present.