this roll 16 is biased by means of a spring 17 against the drum jacket or outer surface 11 and augments the detachment or take off of the fibre material from the drum jacket 11 it is intended to have as little air as possible flow between the transport system 13 and the roll 16 at this take off or detachment zone 18 the approximate width extension of which has been indicated by the two marks 5 and 7 in the drawing of fig1 the fibres detach from the drum jacket or outer surface 11 during operation of the equipment the detached or released fibres form a fibre layer or mat 21 sometimes also referred to as a fibre bat which is collected in a receiving container or receptacle 22 or equivalent structure a guide 23 which is rigidly connected with the receiving container 22 is employed for guiding a plunger 24 or equivalent structure which is movable essentially in horizontal direction this plunger 24 can be driven for instance pneumatically by means of a piston 42 which reciprocates within a work cylinder 41 this plunger 24 has been illustrated in fig1 in its forwardmost position and can be retracted to a position where the end face 33 thereof is located at the height of the container wall 25 i e essentially in a plane containing this wall 25 the container 22 is open in the direction of a withdrawal or delivery channel or duct 26 internally of the delivery channel or duct 26 there are mounted two retaining or hold back baffles or flap members 27 or equivalent structure which bear resiliently.