throttle 18 also by this structural form an ease of operation for the operator with a correctly functioning feed of the roving in the guide element 7 39 is guaranteed fig5 shows another embodiment of a guide element 9 and or 9 39 which is only mounted on a rod 13 39 which supports the configuration at the locations 9 and or 9 39 at the lower left in fig1 and 3 suspended above the ring spinning machine s the lower guide element 9 9 39 in the embodiment according to fig1 also in that of fig3 has the purpose of preventing the dropping of the end of the roving being dispensed to the set of drafting rolls 11 in this embodiment the guide element 9 and or 9 39 has an upper hooklike portion 40 in fig6 i to 6 xii the operating stages i to xii of the bobbin exchange process in which three bobbin rows are exchanged are shown schematically as is apparent the bobbin row c analogous to bobbin row 3 according to fig1 to 3 runs out so that empty bobbins 6 are present this empty bobbin row c is moved away in the direction of the arrow the bobbin rows a and b similar to bobbin rows 4 and 5 in the embodiment according to fig1 to 3 supply roving to the roving guide funnels 12 of the ring spinning machine s according to the working configuration ii the empty bobbins of the bobbin row c are replaced by full bobbins the bobbin row a then comprises nearly empty bobbins 6 39 the bobbin row b is half empty.