DEVICE WITH QUICK CHANGE BLADES, FOR TRANSVERSE CUTTING OR PERFORATION OF MOVING WEBS OF PAPER, PLASTIC OR OTHER MATERIALS

摘要

There is described a device with quick change blades for the transverse cutting or perforation, for the whole of the width and progressively, of continuous and moving webs of paper, plastic or other materials, also with different thicknesses, wherein the fixed blade assembly and the rotary blade assembly are installed on the side members of a main base frame, with the drive means and with the means for adjusting the parallelism and the degree of interference between said two blades, said main base frame being installed removably on a secondary base frame, with means for adjusting the transverse alignment of the same main frame with the blade assemblies with respect to the longitudinal axis of the web to be cut, to allow dynamic execution on this web of a cut perpendicular to the longitudinal sides of the same web, this device being provided with means that allow quick installation and, when necessary, replacement with a new device each time both said blades require in-depth maintenance and adjustments, all for the purpose of limiting the downtimes of the packaging machine during replacement of the same device.