Patent ID: 6380549
Filing Date: 2002-04-30
Classification: B29C,B29K

Abstract:
Device for continuously detecting pinholes or tears in a foil (16) during deformation of the foil (16), comprising a device (12, 18) for clamping the foil (16), a device (14) for controlled deformation of the foil (16), at least one light source (22) situated on one side of the foil (16), at least one light sensor (24) on the other side of the foil (16) for measuring the light penetrating the foil (16,), and a device for continuously registering the light intensity measured by the light sensors (24), the device for controlled deformation of the foil (16) comprises a punch (14) which is situated on one side of the foil (16) and is connected to a drive mechanism for deforming the foil (16), the light source (22) or light sensors (24) being integrated in the punch (14).