and valleys formed by the peripheral walls of the smaller segments 52 rolls 16 18 are axially offset relative to one another to enable these lands and valleys to be mated that is with the lands of roll 16 nestled to a limited extent in the valleys of roll 18 and the valleys of roll 16 nestled in the lands of roll 18 thus the peripheral margins of the disks 50 of roll 16 run between the peripheral margins of the disks 50 of roll 18 in order to guide webs of different widths into the central part of meshed region 15 a pair of plates 54 56 is adjustably mounted on a rod 58 attached to frame 46 the width of the opening between plates 54 56 can then be adjusted to accommodate the width of web 12 each plate 54 56 is narrow enough to slip between adjacent disks 50 to position the web rolls 16 18 contain conventional electric heating elements not shown that can be controlled to bring the rolls to a desired even temperature appropriate for processing the particular web being used referring to fig2 a the machine of fig2 is modified in having a pair of enlarged disks 50e and 50e 39 on roll 16 39 one of which 50e is shown nestled in an end most valley v of the mating roll 18 39 in this embodiment roll 16 39 is axially adjustable as well as being movable away from roll 18 39 the machine is readily set up for mated operation by adjusting roll 16 39 axially until enlarged disk 50e registers with valley v and enters valley v upon adjustment of the.