Abstract: A container for light-sensitive material is folded from a blank of thin opaque material. The blank has four rectangular panels hingedly connected so as to be foldable to form a generally rectangular tube with four sides and two open ends. A cap associated with each end of the tube closes the container in a light-tight manner. Interlocking structure is associated with the hinge connections for forming a tortuous light path to inhibit any light leakage through the material at the hinge connection from reaching the contents of the container. Besides the light-locking effect of the interlocking structure, it enhances cartridge strength in that all edges, when folded up, are double thickness of material. The end caps of the container may be blanked with the side panels with a hinge connection between each end cap and one of the side panels. To prevent light leaks, ridges are formed on the side panel and the end cap to form a tortuous path for any light which leaks through the blushed area.

Abstract: A container is disclosed for dispensing strip material having a light-sensitive layer on one side. A slot through which the strip material can be pulled from a roll of such material within the container has a first lip and a second lip spring resiliently urged toward the first lip. The lips are shaped so that tension in the strip material therebetween produces a resultant force which opposes the resilient force to reduce or eliminate pressure between the light-sensistive layer and the first lip.