Abstract: A method (700) for assessing quality of a longitudinal sealing (402, 502) in a roll fed packaging machine. The roll fed packaging machine comprises a packaging material receiver arranged to receive a web (104) of packaging material (202), wherein the packaging material (202) comprises an outer protective layer (204), an inner protective layer (206) and an intermediate strengthening layer (208), and wherein the web (104) has a first (302) and second (304) longitudinal side section, a strip receiver arranged to receive a protective strip (106), wherein the protective strip (106) has a first (306) and a second (308) longitudinal side section, a strip applicator (122) arranged to form a longitudinal strip sealing (502) by applying the protective strip (106) on the web (104) by heating the web (104) and the protective strip (106) and pressing the web (104) and protective strip (106) together and a strip application camera (108) arranged to capture strip application image data from a strip application area (310).

Abstract: An anvil for forming a transversal sealing of a sleeve-shaped portion of packaging material holding a liquid product, said anvil comprising a main surface, in operation, facing the tube, and a ridge provided on the main surface, the ridge comprising a first section and a second section, wherein the first section of the ridge is placed below the second section such that, in operation, a stress in the packaging material formed by a hydrostatic pressure formed by the liquid product is shifted from a first part of the sleeve-shaped portion placed above the first section of the ridge to a second part placed above the second section.

Abstract: An anvil for transversally sealing a tube having a longitudinal seam portion can include a first elongate contact surface and a second elongate contact surface. In some embodiments, the first elongate contact surface includes a first groove and the second elongate contact surface includes a second groove, each one of the first groove and the second groove being adapted to receive, in use, a respective section of the longitudinal seam portion of the tube. The first elongate contact surface can include a first seam interaction portion positioned within the first groove and having a first surface profile. The second elongate contact surface can include a second seam interaction portion positioned within the second groove and having a second surface profile. In some embodiments, the first surface profile differs from the second surface profile.

Abstract: An anvil for transversally sealing a tube having a longitudinal seam portion can include a first elongate contact surface and a second elongate contact surface. In some embodiments, the first elongate contact surface includes a first groove and the second elongate contact surface includes a second groove, each one of the first groove and the second groove being adapted to receive, in use, a respective section of the longitudinal seam portion of the tube. The first elongate contact surface can include a first seam interaction portion positioned within the first groove and having a first surface profile. The second elongate contact surface can include a second seam interaction portion positioned within the second groove and having a second surface profile. In some embodiments, the first surface profile differs from the second surface profile.