Patent ID: 7707805

Claim:
A method for packaging groups of products ordered in one or more layers comprising: a) supplying a parallelepipedal group of products in a feed-and-guide magazine; b) arranging a packaging sheet in front of said feed-and-guide magazine, said sheet being arranged vertically and parallel to a front face of the group of products to be packaged; c) unloading, by a thrust exerted on a rear face of the group of products from said feed-and-guide magazine and consequently horizontally displacing the group of products and forcing the group of products against said packaging sheet, which at a preselected time is abandoned by a corresponding positioning means, and moved through a first folding spindle from which the group of products exits wrapped by the sheet, said sheet forming a U-shaped wrapping rotated through 90° and open at a back side, with the group of products enveloped by the sheet on an entire bottom face, on the front face, and on an entire top face and with said sheet projecting from the top face for a stretch having a length greater than a height of the rear face of the group of products, upon output from said spindle, a wrapped product will be held at the bottom face and at the top face and made to advance without any sliding by a pair of horizontal conveyors arranged one over another and synchronized; d) arresting the group of products partially wrapped at a start of said pair of conveyors where in appropriate phase succession a last top flap of the sheet is spread out on the rear face of the group of products and, for a stretch, is brought to project underneath the group of products, after which the sheet is folded under the group of products while a corresponding end stretch of the sheet that wraps the bottom face of the group of products is first lowered and is then raised up again under the group of products, so as to be placed under a last end stretch of the sheet; e) mutually fixing said bottom end stretches of the packaging sheet set one on top of another; f) folding at a preselected time on the side faces of the group of products, laterally projecting stretches of the packaging sheet, with folding in vertical-folding flaps of the sheet, of first the front face with respect to a machine working direction and then the rear face, and subsequently folding horizontal-folding flaps; and g) mutually fixing the side flaps set one on top of another of the packaging sheet.