Abstract: A self-correcting web registration system achieves web shortening by pleating the web with a grooved crease roller. The web passes through a nip between the crease roller and an opposing drive roller which has an elastomeric cover. When web shortening is required and the web is being pleated by the crease roller, the opposing elastomeric roller is overdriven with respect to the normal advancement rate of the web. Further web shortening may be achieved by selectively increasing pressure between the crease roller and the elastomeric drive roller which causes the pleats in the web to become deeper. The crease roller may be used in conjunction with a tension roller which can be selectively engaged to stretch the web and achieve lengthening. Both rollers may be mounted in a single chassis which pivots relative to a frame-mounted drive roller. This provides selective engagement of either the tension or crease roller, depending upon the position of the chassis.