Guide system for handling paper material webs comprising: gripping means (1) configured to engage a web (W) of paper material to control its movement according to a predetermined advancement direction (WF); a structure (2) for supporting said gripping means (1); hooking means (4) adapted to temporarily hook a lateral edge (SW) of the web (W), said hooking means being arranged downstream of the gripping means (1) with respect to the aforementioned advancement direction (WF) and configured for temporary hooking the lateral edge (SW) of the web (W) by temporary overlapping a path (PW) followed by the same lateral edge.

Guide system for the handling paper material webs comprising: gripping means (1) configured to engage a web (W) of paper material to control its movement according to a predetermined direction of advancement (WF); structure (2) for supporting said gripping means (1); hooking means (4) adapted to temporarily hook a lateral edge (SW) of the web (W), said hooking means being arranged downstream of the gripping means (1) with respect to the aforementioned direction of advancement (WF);
wherein said hooking means (4) comprise a flexible member (40) equipped with tips (46) adapted for engaging the lateral edge (SW) of the web (W), the flexible member (40) being mounted on a support (41) movable between a hooking position and an inoperative position.

Provided is a conveyance device including a roll storage unit that stores a continuous sheet conveyance medium in a roll, a tractor that sequentially engages engaging parts in engagement holes formed along the length of the conveyance medium and conveys the conveyance medium stored in the roll storage unit, a roll drive unit that delivers the conveyance medium stored in the roll storage unit toward the tractor, a slack detection unit that detects slack in the conveyance medium between the roll storage unit and the tractor, and a control unit that controls the roll drive unit based on the detection value of the slack detection unit.

The method serves for producing flexible packaging products, more particularly packaging bags, the packaging products being formed by welding together two film layers. In order to avoid imprecisions in the sequence of process steps, film sections (4) formed of film layers are separated from a film web (7a; 7b) and transferred to a transport device (1) where they are positively fixed at least at one edge by means of a fixing device (3). Then the film sections (4) are transported by means of the transport device (1) in a transport direction (5) to at least one welding station (12) while maintaining the positive fit, the film layers are welded together in the latter, and the film sections (4) are subsequently further transported while maintaining the positive fit.