Abstract: The base of the machine consists of three modular casings (1, 2, 3) which are aligned with one another and fixed together and inside which the synchronized systems for the various work stations are arranged. The frames of the parallel and vertical-axis belts (C1, C2) which are designed to convey the boxes (B) with a vertical arrangement are supported cantilever-fashion by the base casings, via upturned portal structures (6). The operating stations of the machine are supported by the frames of the belts or by the base casings, such that the box conveying line is free at the bottom so as to allow better cleaning and better inspection. The middle module (2) inserts the product (V) into the boxes.