Device for opening an end region of a tubular bag body

A device for opening an end region of a tubular bag body, which end region extends between an open tube body end and a bottom central line, having a transporting device, on which the bag body is transportable with adjacent tube walls in a bag conveying plane at a transport rate in a transporting direction, wherein the bottom central line is oriented in the transporting direction, and having suction devices arranged on both sides of the bottom central line, which are driven so as to be movable transversely back and forth to the transporting direction and moveable to abut at the tube walls of the end region of the bag body situated therebetween and which are then moveable apart from one another under exertion of a suction force onto the respective tube wall, pulling the tube walls apart from one another, wherein the suction devices are additionally moveable in and opposite to the transporting direction, wherein the suction devices are mounted at first articulate joints, wherein at each first articulate joint there are hinged two pivoting arms pivotable relative to one another, wherein each pivoting arm is pivotingly connected to a positioning pivoting arm by means of a second articulate joint, wherein each positioning pivoting arm is driven movably.