a transverse web gathering device gathering the fiber web and a sliver trumpet through which the gathered fiber web passes for being densified and discharged thereby as a running sliver the sliver trumpet has a cross sectionally rectangular outlet opening which has a width that is at least 10 times greater than its height the apparatus further has a calender roll pair formed of two calender rolls through which the sliver passes after being discharged by the sliver trumpet the calender roll pair defines a bight in which the outlet opening of the sliver trumpet is disposed application_number US 77068701 A description fig1 illustrates a carding machine cm which may be for example a high performance dk 903 carding machine manufactured by tr u00fctzschler gmbh amp co kg m u00f6nchengladbach germany the carding machine cm has a feed roll 1 a feed table 2 cooperating therewith licker ins 3 a 3 b 3 c a main carding cylinder 4 a doffer 5 stripping rolls 6 cooperating crushing rolls 7 8 a web guiding element transverse web gathering device 9 a sliver trumpet 10 calender rolls 11 12 and a travelling flats assembly 13 having slowly circulating flat bars 14 the rotary direction of the carding machine rolls is indicated by curved arrows drawn thereinto at the output of the carding machine a coiler device 16 is provided which deposits the sliver into a coiler can 15 the working direction that is the advancing direction.