Process for realising blanks for boxes to measure

A process for realising boxes to measure, characterised in that it comprises the following steps:

• collecting a sheet (10) of packing material from a store (1) of unprocessed material constituted by sheets (10) of packing material having predetermined dimensions and arranged to form a stack;
• transferring the sheet (10) collected from the store (1) to a cutting station (2) and cutting the sheet (1) into a plurality of pieces (11, 12, 13, 14), which plurality of pieces (11, 12, 13, 14) exhibit (a) a common longitudinal dimension and (b) lateral dimensions which are different from one another according to predetermined ratios wherein the longitudinal dimension is length, and wherein the lateral dimensions are widths;
• transferring the pieces (11, 12, 13, 14) on command to at least a plurality of stores (31, 32, 33, 34), each of which is predisposed to house dimensionally homogeneous pieces in stacks;
• collecting, on command, from one of the stores (31, 32, 33, 34) which is preselected according to one of the dimensions of a box to be formed, single pieces for forming a bottom of a box and two first opposite lateral walls (24) thereof;
• collecting, on command, from one of the stores (31, 32, 33, 34) which is preselected according to another of the dimensions of a box to be formed, two second opposite lateral walls (25) thereof;
• joining, if necessary, two or more dimensionally-homogeneous pieces one after another to form a longer piece with respect to the dimensionally-homogeneous pieces housed in a corresponding store (31, 32, 33, 34), the longer piece being adapted to constitute a bottom piece (20) which comprises the bottom and at least two first opposite lateral walls (24) of the box being formed;
• cutting to measure said bottom piece (20);
• cutting to measure other lateral pieces (21), dimensionally homogeneous to one another and destined to form the two second opposite lateral walls (25);
• transferring the bottom and lateral pieces (20, 21) on a work plane (4);
• a first marking or scoring, singly operated, either on the lateral pieces (21) or on the single bottom piece (20) for realising, at predetermined positions of each piece, first weakened or scored lines parallel to each other;
• a second marking or scoring, for realising either on the bottom piece (20) and/or on the lateral pieces (21) in predetermined positions, second weakened or scored lines which are perpendicular to the first weakened or scored lines;
• optionally removing corner portions of some of the bottom and/or lateral pieces (20, 21) previously cut to measure;
• and
• joining the bottom and lateral pieces (20, 21), previously cut to measure, to form a single body constituting the blank (40), flat, complete and ready to be folded and glued to form the box.