transport means 318 are rendered superfluous and wherein cleaning elements 320 and cleaning means 323 329 are readily exchangeable fig4 is another schematic representation of the cross section of an open end spinning assembly 401 in the vicinity of feed roller 6 and opening roller 9 whereby a tangential belt 418 is provided below the collecting opening 413 as a transport means for the cleaning elements said belt simultaneously serving as a debris collecting means this preferably adjustable tangential belt 418 is provided with a plurality of cleaning elements 430 431 and 432 said elements being arranged in a row combined into a group and having different designs said elements all being removable and therefore replaceable on tangential belt 418 and being adjustable with respect to the various components of spinning assembly 401 cleaning element 430 is a flexible element bent into a semicircle said element being capable of passing through a bore 433 in a guide surface 434 as it is transported to the left whereby debris can also be wiped out of the bore which serves to supply air as soon as tangential belt 418 has moved further to the left cleaning element 430 is bent to the right due to its flexibility so that it is pulled out of bore 433 again the second cleaning element 431 is disposed offset slightly sideways with respect to cleaning element 430 so that it wipes laterally behind wall 435 and can clean recess 436 cleaning means 432 finally can clean.