a diameter in its central region that is greater than the diameter proximate its end portions the diameter can taper straight from the central portion to the ends can parabolically taper from the central portion to the ends can utilize a combination of a parabolic shape and straight taper or other profile variations application_number US 85995801 A description in the following detailed description of the invention specific preferred embodiments of the invention are described to enable a full and complete understanding of the invention it will be recognized that it is not intended to limit the invention to the particular preferred embodiment described and although specific terms are employed in describing the invention such terms are used in a descriptive sense for the purpose of illustration and not for the purpose of limitation with reference to the drawings fig1 is a perspective environmental view of a roll according to the invention illustrating one arrangement in which it could be used as illustrated the apparatus is arranged so that fabric f passes behind a first roll 10 over the web spreader roll 12 and behind a third roll 14 as illustrated the first and third rolls 10 and 14 respectively are conventional type rolls having a consistent diameter along the roll length in.