Sachet wall weakening and bending device, has stamp moving along predefined course on film, resting on plane surface of block, bends film to tear exterior layer without tearing interior layer of film

摘要

The device has a block (2) including a plane surface (P) that accommodates a film (3) resting along an interior layer (17). A stamp (4) is moved along a predefined course (C) on the film along an axis (6) perpendicular to the plane. The stamp bends the film to tear an exterior layer without tearing the interior layer. The interior and exterior layers are having strong and weak resistances to rupture of film, respectively. An Independent claim is also included for an application of the device for deforming and local weakening of walls of complex films of sachets.