Patent ID: 7797913

Claim:
A method for packing groups of products or products of prismatic shape having a rectangular or square base, comprising moving said groups of products or said products from a feed or grouping unit towards a first folding spindle so as to be delivered therefrom wrapped substantially in a shape of a “U” rotated through 90° and open at back, by a packing sheet which is present in front of said spindle with vertical positioning, wherein the groups or the products along with the packing sheet are delivered from said spindle and picked up directly and fed in phase between parallel and horizontal motorized conveyors of a tilting drum, wherein folding devices are arranged inside said tilting drum longitudinally, edgewise and parallel with each other; said folding devices laterally guiding the groups of products or the products with the packing sheet and folding on lateral faces of said groups or said products first flaps of said packing sheet with vertical folding, projecting laterally and anterior in feed direction, while said groups or said products are advanced along said tilting drum by said conveyors; and wherein maintaining as a fixed reference an ideal horizontal plane on which said groups or said products run during packing so as to receive and operate on products of different formats and including varying, in a self-centering manner, spacing between the conveyors of the tilting drum and to simultaneously adjust positioning in height of an axis of rotation of said tilting drum, with lowering or lifting of the positioning being respective of a decrease or increase of the format.