Abstract: To place the bags on a filling spout, the bags are hurled one at a time w the valve flange through a shaping tube, which is distanced from the spout as to allow the filled bag to be removed from the spout without displacing the tube. The bag is hurled at high speed by at least one continuously moving belt engaging the bag body along the entire length of the tube, as to be placed on the spout substantially when the valve flange leaves the tube. This latter is formed of two symmetric parts, the distance between which is adjustable by means of double screws having two ends threaded in opposite directions and engaging corresponding holes of the two parts of the tube.

Abstract: The bags have each a pair of flanges folded on two edges, one of the flan being provided with a valve. The bags are placed vertically in a magazine, with the valve flange located on the vertical plane of a valve oening device. The bags are picked up one at a time by a device including a set of vacuum cups carried by a pivoted arm. The valve flange of the bags is firstly engaged by the vacuum cups. The arm is then rocked on said plane to align the flange with the opening device. Finally, the arm is telescopically extended the insert the flange into the opening device.