| 摘要 |
<p>A web-spool for a cartridge comprises a cylindrical core having an outer periphery at each end thereof with at least one core lug and an annular ring extending radially outward from each periphery in axially spaced relation to form a core peripheral groove therebetween at each core end. The annular rings at both core ends have respective inner tapered surfaces that face each other to initially guide a web being wound onto the core, and also to provide clearance between the wound web edges and adjacent core flanges, to thereby accommodate any web telescoping and thus permit the flanges to be readily secured to the core ends without interfering with the web edges. Each flange has an axially inner surface with an annular throat extending axially outward therefrom for receiving the core lug(s) and annular ring. Within the annular throat is at least one radially inwardly extending flange lug with recesses at both sides thereof, the flange lug(s) being adapted to nest within the core peripheral groove and the recesses being adapted to receive the core lug(s), when a core end is inserted into the flange throat and the core and flange are then turned relative to each other. Complementary ratchet teeth are provided on opposed mating surfaces of the core and flange, to permit relative rotation therebetween in one direction for securing the two together, and to prevent relative rotation in the opposite direction and consequent unintended disassembly of those members.</p> |
