US Patent 8353236 Perforating equipment for continuous forms in movement

A perforating equipment (111) for continuous forms in movement comprises tree transversal perforating device (54, 56, 57) for executing transversal perforations on continuous forms (58) to be divided in three longitudinal sections and continuous forms to be divided in two longitudinal sections. Each perforating device includes a contrast member (61, 62, 79), a blade support mounting a blade (116a, 117a, 118a) for the three section form and a blade (116b, 117b, 118b) for the two section form, a blade servomechanism (73, 74, 85) and an activation group (104, 106, 107). The blade servomechanism rotates the blade support for a condition of interference of a blade in the position of perforation; and the activation group causes the contrast member to contrast a corresponding blade for the perforations of the forms to be divided into three sections, or the forms to be divided into two longitudinal sections.