Vertical-flow wrapper and method to produce a bag

A vertical flow-wrapper comprising:

• a form-fill-tube along which a film is transported in a transport direction and formed into a film tube,
• a longitudinal-sealing means, which seals two opposing longitudinal ends of the film tube together to form a longitudinal seal, the longitudinal-sealing means comprising a seal jaw and a pair of guiding rollers provided entirely upstream from the seal jaw to guide the two opposing longitudinal ends of the film tube through the seal jaw and pressing means to press the two opposing longitudinal ends of the film tube together to form the longitudinal seal, wherein the pair of guiding rollers are not driven by a motor,
• a cross-sealing means and a cutting means which provide cross seals to each package and separate packages from each other, and
• wherein an axis of rotation of the pair of guiding rollers are provided parallel to a transportation plane of the two opposing longitudinal ends of the film tube and not perpendicular to the transport direction.