pressure roll 16 from a location in advance of any contacted by blanket 10 to a point where the edges 13 have been turned inward on the major body portion of the body as viewed in fig5 a the blanket at station a of fig2 has feathered edges 13 which are picked up by turning surfaces 48 before the major surface of the blanket engages roll 16 as at station b of fig2 and fig5 b when advanced to station c of fig2 the blanket major surface is supported by roll 16 as shown in fig5 c in this state the feathered edges are upstanding and somewhat drawn in toward the major body portion of blanket 10 the further advance of blanket 10 brings its elevated edges into contact with a directing surface in the form of ear 50 which is contiguous with turning surface 48 and is inclined with respect to the path of advance of the blanket at an obtuse angle so that as the blanket advances the edges are turned inward as shown in fig5 d depicting station d of fig2 downstream of station d the directing surface 50 is closer to the centerline of the blanket path so that the rolling of the edge is greater surface 50 converges to the flange 34 flange 34 in the region between the pressure roll and the mandrel comprises the ultimate blanket edge forming face of guide 24 station e of fig2 and fig5 e illustrate the initial location where guide surfaces normal to the roller are exclusively presented to the.