Spool for correction tape assembly

A spool for a correction tape assembly having a correction tape-winding core, said spool comprising:

• a spool shaft designed to releasably hold a winding core axially slideable and relatively nonrotatable thereon;
• said spool shaft comprising a sleeve having a lower core-receiving section and a top cap-receiving section having an outer cap-engaging surface;
• and
• a cap releasably secured to the cap-receiving section of said sleeve and designed to confine a said winding core on the core-receiving section of said sleeve;
• said cap having a depending wall having an inner shaft-engaging surface which engages the outer cap engaging surface of said spool shaft when said cap is secured to said sleeve;
• wherein the engaging surface of either said cap or of said spool shaft is provided with a projection extending in a radial direction, and the other engaging surface is provided with a recess which receives and engages said projection when said cap is secured to said sleeve;
• a portion of the engaging surface provided with said projection or a portion of said engaging surface provided with said recess comprising a tongue-like flexible plate or finger;
• said projection having at least one flat surface which contacts a wall surface of said recess in the axial direction along said spool shaft, so that said cap cannot be released when an axial cap-pulling force is applied;
• and
• said projection having at least one tapered side surface which is inclined towards a side wall surface of said recess, whereby when a cap-rotating force is applied around said shaft said tapered side surface contacts said side wall surface and said tongue-like plate or finger is resiliently bent or flexed to cause said projection to move out of said recess and permit said cap to be removed from said shaft.