Patent ID: 6095330
Filing Date: 2000-08-01
Classification: B65D,G03B,G03C

Abstract:
A light-tight packaging entity comprisinga winding tube with open ends,a length of light-sensitive strip-shaped material wound in the form of a spiral around the winding tube forming a hollow cylindrical film roll with substantially flat end faces and an outer curved surface,a pair of flange-shaped side covers each comprising a rigid flange disc with an outer edge, the diameter of which is larger than the diameter of the outer curved surface of the film roll and each of which screens an end face from light,a flexible covering film wider than the strip-shaped material enveloping the outer curved surface of the film roll and the outer edge of each side cover to screen the strip-shaped material and the side covers from light,wherein the covering film at least in lateral edge regions comprises a heat-shrinkable material shrunk onto the outer edge of each flange disc,and wherein the covering film is coated with a heat-resistant separating layer for preventing welding of individual layers of the covering film on shrinkage.