Patent ID: 8708878

Claim:
A functional roll comprising a tubular roll axis with multiple fine pores, and a roll unit having a roll hole engaged with the roll axis comprising a high-density porous sheet material of elastic non-woven sheet material or a functional composite sheet material providing a cross-linking elastic material onto the non-woven sheet material, whereby the roll unit further comprises a lattice-shaped fluid guidepath structure comprising an internal pressure action space comprising a cut-out portion which is provided on the inner circumferential area of the roll unit and provided in the axial direction of the roll unit as well as an internal pressure branching guidepath provided in the radial direction of the roll unit and connected to the internal pressure action space, the internal pressure branching guidepath comprising porous sheet material of the elastic non-woven sheet material or the functional composite sheet material, whereby the porous sheet material has a lower density than the high-density porous sheet material and a roll hole, whereby internal pressure is applied to the aforementioned roll unit through the lattice-shaped fluid guidepath structure, wherein the low-density porous sheet material has an extended portion provided to reach the cut-out portion of the internal pressure branching guidepath which comprises the internal pressure action space.