travel in operation after placing all of the tongues onto their cylindrical pins 30 the edge zone of the press shell 10 is clamped between the shell support disc 12 and the clamping flange 15 by tightening the screws 16 finally a pressure screw 22 is loosened from the bearing ring 11 which frees that ring to move outward so that the compression springs can tension the press shell 10 in the axial direction an alternate technique described further in connection with fig5 of securing the tongues 28 is to provide projections on the inside of the clamping flange 15 and corresponding holes in the tongues to receive those projections wherein the holes are placed so that the projections hold and uniformly and adequately tension the press shell axially fig4 shows how each of the tongues 28 can be pulled in the direction toward the axis of the press roll by means of a tubular tool 33 which acts like a lever fig4 shows the shell support disc 12 with the sealing ring 23 one of the sleeves 32 and one of the cylindrical pins 30 the clamping flange segments 15 and their fastening screws 16 are removed the tool 33 is passed through the hole 31 at the tip of the tongue 28 and is placed onto the cylindrical pin 30 which then serves as its fulcrum the tool 33 can now be swung toward the axis of the roll in the direction indicated by the arrow p and the tongue 28 is then.