a description of their operation is not necessary for an understanding of the present invention fig2 and 3 illustrate one embodiment of the asymmetrical trimmer disk apparatus 28 of the present invention in this embodiment the trimmer disks 30 32 are provided with four pockets or recesses 34 40 and 34 u2032 40 u2032 respectively equiangularly spaced 90 degrees apart around the periphery of the disks the pockets 34 34 u2032 are shown in confronting tangential relationship with the nip 42 between the disks located a given depth e g 3 mm below the upper surfaces of the disks 30 32 fig3 as the disks 30 32 rotate in opposite directions as shown by the arrows in fig2 successive pockets 38 38 u2032 36 36 u2032 and 40 40 u2032 come into tangential confronting relation and trim off the tobacco braid a few millimeters below the nip formed between the upper surfaces of the disks it will be understood by those skilled in the art that the trimming off of the underside of the tobacco stream or braid with the trimmer disks 30 32 as the braid advances along the braid axis a will result in spaced regions along the tobacco braid where the volume of tobacco is greater by an amount approximating the volume of the pocket pairs 34 34 u2032 38 38 u2032 36 36 u2032 and 40 40 u2032 in the four pocket trimmer disk embodiment of fig2 and 3 the disks 30 32 have asymmetrical pockets in both depth and width for example the pockets 34 34 u2032 and 36 36 u2032 have a depth of 3 mm and a width of 16 mm for forming a densified region at the filter end.