| 摘要 |
<p>A light-tight enclosure (10) for storing and dispensing a roll (12) of photosensitive web material (14) wound about a hollow cylindrical core (42) having open opposite ends (32, 34). The enclosure comprises a flexible opaque bag (16) with opposite sidewalls (18) extending between opposing rearward and forward portions (20, 22) and between opposing upper and lower portions (24, 26). Each sidewall has a central aperture (28, 30) therein congruent with each core end. The rearward portion defines a closable opening for receiving the roll. A shallow neck portion (36) projects from the forward portion to an end thereof defining an exit slot (40) for dispensing the web material. An annular ring (48) is light-tightly bonded to the inner surface of each sidewall congruent with the central apertures. Each ring has an annular flange (54) on its inner radial surface (56) which fits rotatably within a mating annular groove (47) in the outer surface of the core near the end of the core when the ring is fitted around the end of the core, providing thereby a light-lock between the rings and the core. Preferably, the outer diameter (44) of the core is reduced (46) near its ends to accommodate rings having substantially the same outer diameter as the central portion of the core. Preferably the core surface between the grooves and the ends of the core is formed into circumferentially alternating reliefs (62) and prominences (64) to facilitate installing the rings onto the core. <IMAGE></p> |
