Abstract: A device (10) for selective transfer of rows of products (11) between pairs of facing upper conveyor belts (12,13) and a lower belt (18) arranged at a right angle. One end of a first upper conveyor belt (12) for arrival of products is inclinable toward a lower belt (18). Beneath each facing end of the upper belts (12, 13) there is an intermediate horizontal shelf (14, 15) for reception and discharge of products. At least the first shelf (15) beneath the second upper belt (13) is inclinable between the horizontal position and a position inclined upward to align with the end of the opposite upper belt (12) inclined downward. At least the other shelf (14) being movable between a high position in which it is aligned with the first shelf (15) in a horizontal position and a low position aligned with the corresponding edge of the lower belt (18).

Abstract: A packaging machine comprises a strip feeder (13) and tube former (14) for heat-welding plastic film strip into a tube. First welding apparatus (15) weld between them the side edges of the strip while a feed line (11) inputs into the tube thus formed products (12) that are to be packaged. Second weld apparatus (16) welds transversely of the tube at intervals to isolate each product in a section of the tube, thus realizing the packaging. Characteristically the first (15) and second (16) welding apparatus are pressed against the strip parts to be welded by an actuator (33, 34, 36, 37, 44, 43) controlled by a control device (46) to exert a pressure which is a function of the speed of travel of the strip.