are gripped at transversely spaced portions thereof by the conveyor means 100 and 200 and as soon as the sheaths reach the trailing end 100 34 of the first conveyor they are gripped at portions thereof by the third conveyor 300 so that they are still gripped at transversely spaced portions by the conveyor means 200 and 300 at the beginning of their passage over the second stripping means s 2 only after the sheaths reach the trailing end 200 34 of the second conveyor means they are only gripped between the lower run of the upper conveyor 300a and the upper run of the lower conveyor 300b which pull the thus gripped sheaths over the outwardly extending portion s 2 34 of the second stripping means as mentioned before each of the stripping means comprises a blade having an upper stripping edge against which the sheaths are pressed by a wooden block or the like so that the pulpy material is squeezed out together with the sap of the sheaths while they are transported sidewise by the conveyor means it will be understood that each of the elements described above or two or more together may also find a useful application in other types of apparatus for defibering sheaths of fibrous material differing from the types described above while the invention has been illustrated and described as embodied in a novel apparatus for defibering sheaths of fibrous material in which the sheaths are transported sidewise by conveyor means over stripping blades it is not intended to be limited to the details shown since various modifications and structural changes may be made without departing in any way from the spirit of the present invention without further analysis.