Method for determining the size and location of heads (for packaging of paper rolls)

Abstract From the Canadian patent

This publication discloses a method for the determination of size and location of end heads (1) in a roll wrapper. According to the method the end head (1) is transferred, by means of a pickup arm (4) over photocells (2 3) and, the instants of photocell output signal changes are measured. The distances between the intersect points (A A', B, B') are determined on the basis of the obtained intersect times and the speed of the end head (1) and, the size and location of the end head (1) are then determined on the basis of the obtained intersect distances and the distance between the photocells (2 3). The, obtained measurement results are used for controlling the end heading machine.