Abstract: A valve sack for bulk material such as cement, gypsum, pellets, animal feed, or similar having a stand-up base, preferably a cross-base or a block base, and having a valve base that is disposed opposite the stand-up base and into which a valve hose is worked that forms a valve for filling the valve sack in the region of a first corner fold of the base fold, characterized in that the valve hose is formed from a thermal material and from a material different therefrom, with both materials being weldable or sealable with one another to close the valve.

Abstract: A packaging machine, a method for filling product into gusseted open-mouth bags, and an open-mouth bag are provided. The packaging machine includes a filling device for filling the open-mouth bags through a filling end. A closing device is provided with which the filling end can be sealed to be completely tight after the filling process by a weld seam. An additional welding device is provided. The additional welding device is suitable and configured to place in the gussets of the open-mouth bags two additional holding seams laterally spaced apart from one another in the transverse direction and oriented approximately parallel to the weld seam.

Abstract: Device and method for processing open-mouth bags with a bag opening device for opening an open-mouth bag and with a valve inserting device which is suitable and intended to insert a de-aeration valve into a bag wall of the open-mouth bag.