comprising furthermore a thread storage means for providing thread from a thread spool; FIGS. 4 a, 4 b are a plan and side view, respectively, of an apparatus according to a fifth embodiment of the present invention comprising two cartridges of the present invention for providing thread; FIG. 5 a is a plan view of two of said cartridges shown in FIGS. 4 a and 4 b; FIG. 5 b is a side view of one o