wedge of cement material such as silicon 65 is applied to the axle protrusion to assist in holding the inner mounting ring in place along the length of the axle protrusion as illustrated in fig4 and 6 the insulator blanket 19 can be applied at its outer peripheral edge to the rotary dryer cylinder 10 by means of rectangular mounting blocks 68 each mounting block 68 includes a pair of openings 69 that are sized and spaced to correspond to the size and spacing of the connector screw heads 14 of the rotary dryer cylinder 10 as illustrated in fig5 the openings 69 include a taper 70 at the surface to be applied to the connector screw heads 14 and the mounting block 68 is thrust about the connector screw heads 14 and the screw heads tend to slightly deform the inner surfaces of the openings 69 with this structure and procedure for mounting the rectangular mounting blocks 68 the connector screws 14 are not rotated or otherwise modified in their position on the rotary cylinder and the mounting blocks 68 tend to hold the connector screws in a non rotatable position a central internally threaded opening 71 is formed in each mounting block between the openings 69 and the grommet screws 61 extend through the grommets 59 and into the threaded opening 71 to hold the outer peripheral portion of the insulator blanket to the axial end wall of the rotary cylinder as is illustrated in fig7 the rectangular mounting block 68 is used in combination with a flat outer mounting.