Abstract: The machine comprises: a first assembly (2) with receiving, pressure and feed elements (3, 5), through which the part-finished item is fed, and downstream of these two elements a first folder roller (9) with a line of bristles, for folding and glueing the first front flap, and a pair of pressure rollers; a second assembly (20) with receiving, pressure and feed elements in the opposite direction, with a second folder roller (29) and a pair of pressure rollers (39) for folding the second flap, now the front flap; downstream of the second assembly (20) there is an assembly (219) with a transverse conveyor (320) for moving the part-finished item in two opposite directions (fC, fD), with two assemblies (220, 222) for successively folding and glueing the remaining two flaps of the paper.

Abstract: The machine is used to fold and glue paper covering borders onto cardboard or other materials and includes a folding element (9) with a symmetrical row of bristles for folding and gluing the borders passing through in both directions and capable of acting alternately in the two opposite directions; and, on both sides of the mechanism, symmetrical receiving, pressing and advancing elements (1, 3, 5, 7; 21, 25, 27), between which the semi-finished article is fed in a first direction of advance (fA) which is orthogonal to one side of the semi-finished article, and which are capable of operating alternately in two opposite directions (fA, fB) to carry out the folding of the two parallel and opposite borders of the article; a single article may be inserted twice in orientations orthogonal to each other for the folding of the four borders.