Abstract: A flexible deformable blank support such as a strip of paper, is fed and continuously treated or worked on in connection with its passage through a computer printer. The paper can be in the form of a roll or can be folded, and can pass through a finishing unit such as a perforator or a cutter. Plural autonomous printing units are provided, to perform different printing operations, in addition to or in lieu of the finishing units such as the perforators or cutters. The autonomous units are selectively controlled so as to adapt the printing and/or finishing as a function of the operation performed by the computer printer.