to the feed direction includes an elongated cavity extending along the tray length an elongated element which is resistant to bending is received in the cavity and is substantially coextensive therewith the feeding device further includes a support for positioning the feed tray adjacent the fiber advancing member application_number US 53905695 A description turning to fig1 there is illustrated therein a fiber tuft cleaner which may be a cvt model manufactured by tr utzschler gmbh amp co kg m onchengladbach germany the apparatus is disposed in a closed housing and the fiber material b such as cotton is introduced in fiber tuft form into the cleaner such a material supply is effected by means of a non illustrated feed chute or a conveyor belt or the like the fiber mass is advanced to a rapidly rotating pin roller 3 by a feed roller 1 in cooperation with a feed tray 2 whereby a clamping effect is exerted on the material the pin roll 3 may have a diameter of for example 250 mm and is rotatably held in the cleaner housing for a counterclockwise rotation as indicated by the arrow 3b the pin roll 3 is followed by sawtooth rolls 4 and 5 the sawtooth roll 4 may have a diameter of approximately 250 mm the pin roll 3 and the sawtooth roll 4 may have a circumferential speed of for example 15 m sec and 20 m sec respectively the circumferential speed of the sawtooth roll 5 is greater than that.