Patent ID: 8051757
Filing Date: 2011-11-08
Classification: B26D,Y10T

Abstract:
1. A method of cutting, simultaneously on two axes perpendicular to each other, of a substrate with series of images, comprising the steps of: feeding forward the substrate to a flow direction; determining a correct cutting line in a transverse direction to the feed direction of the substrate; aligning suitable transverse mobile cutting means with the cutting line by means for shifting the transverse mobile cutting means; cutting the substrate in the transverse direction to the feed direction thereof by said transverse mobile cutting means; detecting a position of reference marks on the transverse direction to the feed direction of the substrate by means of detecting means; forwarding from the detecting means a direction signal to a microprocessor; determining through the microprocessor correct cutting lines in a longitudinal direction with respect to the feed direction of the substrate; controlling by the microprocessor by a shifting means to shift longitudinal cutting means in a direction transverse to the feed direction of the substrate; cutting the substrate in the longitudinal direction along said cutting lines by said longitudinal cutting means; wherein the step of controlling said shifting means is carried out as a function of speed at which the substrate is fed forward and of a speed at which a distance varies between a reference mark of an image and an ideal feed direction; and the step of determining a correct cutting line in the transverse direction to the feed direction of the substrate comprises the operations of: detecting the speed at which the substrate is fed and the speed at which the distance varies between the reference mark of the image and the ideal feed direction; and determining a correct cutting line in a transverse direction to the feed direction of the substrate by data processing according to trigonometric relations by means of said microprocessor to obtain the angle of parallelism defect of the image with respect to the ideal feed forward direction.