in a stripping means for shredding machines or the like with spaced interleaved cutting disks , primary strippers closest to the cutting zone engage in a circumferential zone of the associated cutting roller , but only in every other annular slot . the intermediate annular slot is occupied by strippers at another circumferential zone of cutting roller . an advancing load of comminuted material does not simultaneously strike all the primary strippers over the entire roller length for stripping . instead , the load strikes the strippers in time succession . the primary strippers form guide elements through which adjacent material flows of the comminuted material are spaced and then can optionally be brought together again for mixing purposes . as a result it is much more difficult to re - associate parts of the material flows or the particles forming the flows in attempting to recover the position of the comminuted parts in the non - comminuted original .