inches the blanket 50 includes a bevel b 39 along each of the side edges each of which defines a bevel width bw 39 i e the distance between the inwardmost point of the bevel to an imaginary line drawn downwardly from the blanket outer edge and a bevel thickness bt 39 i e the distance into which the bevel extends into the overall blanket thickness t 39 although the bevel is illustrated as being rounded in fig4 it is noted that other bevel shapes can be utilized within the scope of the instant invention including but not limited to planar bevels such as that shown in fig2 and those of mixed geometric or irregular shape for example the inner surface 50b can be beveled gradually at each side edge of the belt to define first and second substantially planar bevels in a preferred form of this embodiment each of the bevels extends at substantially a 45 u00b0 angle relative to the bearing face of the belt in the illustrated embodiment the bevel thickness bt 39 is slightly over one half of the overall blanket thickness t 39 while this thickness ratio has been found to be useful it is to be noted that other ratios and bevel angle slopes are anticipated within.