Assembly for forming bags

An assembly for forming bags, the assembly including:

• a former shoulder;
• a controller;
• a belt drive controlled by the controller for feeding a film at a film speed to the former shoulder to form a tubular film moving in a film direction;
• a sealing device to seal the tubular film in a first sealing direction, the first sealing direction being parallel to the film direction;
• a set of jaws controlled by the controller and movable at a jaw speed to engage and seal the tubular film in a second sealing direction to form a first seal and a second seal in each bag, thereby forming a closed bag, wherein the second sealing direction is generally perpendicular to the film direction, and the first seal of each closed bag is located in the tubular film at a distance along the film direction from the second seal of the closed bag;
• the set of jaws including cooperating pairs of:
• closer bars for closing the tubular film;
• stripper bars for moving, prior to the set of jaws forming the second seal of a bag to be closed, at a speed that differs from the film speed by a relative speed;
• and
• sealing jaws for forming the first and second seal,
• wherein the closer bars, when the tubular film is closed, are separated by a first distance, and the stripper bars, when moving at the relative speed, are separated by a second distance,
• a conveyor to receive the closed bag and to convey the closed bag to a destination;
• and
• a sensor assembly operatively associated with the conveyor, to provide a volume signal, the volume signal being indicative of a volume of the closed bag, to the controller;
• and
• wherein the assembly includes:
• a first distance adjustment device for adjusting the first distance and/or a second distance adjustment device for adjusting the second distance,
• wherein the controller can operate the first and/or second distance adjustment device in response to the volume signal.