| 摘要 |
Described is an apparatus for glueing two webs ( 3, 4 ) of packaging material for the production of liquid-tight packs, wherein each web ( 3, 4 ) is covered at least at one side with a liquid-tight adhesive layer ( 58, 65 ) which can be activated by heat, comprising clamping means ( 5, 21, 27 ) for clamping the material webs ( 3, 4 ) fast, a cutting unit ( 11 ) for applying an inclined cut ( 16 ) extending substantially transversely with respect to the material web ( 3, 4 ), and a welding unit ( 30 ) for applying heat and pressure for glueing the material webs ( 3, 4 ) along the adhesive strip ( 29 ). In order when changing an empty roll to a new full roll at the factory to provide the material web with a factory adhesive location of adequate quality which ensures a higher and more reliable level of liquid-tight sealing integrity, it is provided in accordance with the invention that the welding unit ( 30 ) has a slider ( 31 ) which is displaceable along a transverse rail ( 28 ) substantially transversely with respect to the direction of travel ( 9 ) of the material web ( 3, 4 ) and on which are arranged a heating means ( 33 ) and therebehind in the direction of displacement ( 20 ) a pressure roller ( 38 ). |
