Form, fill and seal machine for tubular bags

摘要

Bag forming machine comprises a feeding system, a longitudinal welding unit (18) and a discharge unit (17) connected to a compressed air source. The compressed air source and/or a low pressure source has a connection having electrically adjustable valves (54, 56, 58, 70, 72) and a control device with a unit for introducing a pressure to be controlled by the valve. The control device has a storage unit for storing pre-adjustments of the valve which are selected via the discharge unit. The electrically adjustable valves are proportional valves.