the press jacket 10 is the same as shown in fig3 the end liquid tight closure of the inner space defined by the press jacket 10 could in principle be developed in exactly the same way as in fig1 and 2 or 4 or 5 using a bearing ring 11 that is displaceable on the pin 44a and a jacket support disk 12 mounted thereon however differing from this in fig6 a bearing ring 51 is developed on the roll member 44 over the ring 51 there is mounted through anti friction bearing 43 and adjacent sealing ring 49 an annular jacket support element 42 mounted concentric to the roll member 44 the press jacket 10 is fastened by clamping ring 45 and screws 16 to the outer end surface of the jacket support element 44 this attachment and the preceding shaping of the press jacket 10 for instance by use of the tension springs 30 is effected in the same way as has been described above with reference to fig1 to 5 mounting of the jacket support element 42 at a greater distance from the axis of the roll than in fig1 is possible since only a small difference in speed of rotation occurs between the press jacket and the roll body 44 at the top of fig6 can be noted a small piece of a counter roll 50 which forms a press nip with the press roll in the circumferential region outside the press nip there is a small distance a between the press jacket 10 and the roll body 44 since the inside diameter d fig3 of the press jacket.