Anvil roll with protrusions with outwardly oriented pinched wired arcs

An anvil roll, for treating a web material,

• exhibiting a cylindrical outer support surface, an anvil roll axis, a radius,
• comprising
• a plurality of arcs protruding outwardly of said cylindrical outer base surface,
• said arcs being formed by an arc wire,
• said arcs comprising
• an upper free arc portion oriented outwardly of said support surface
• such that the surface of said arc wire tapers down from its tip as the most outwardly positioned point of said free arc portion towards said anvil roll support surface in all directions,
• a first and a second side arc portion,
• wherein said plurality of arcs is arranged such that
• an arc tip line connecting said most outwardly positioned points of said upper arc portions defines the x-direction of said arcs,
• wherein each arc exhibits a length extension (xH) along x-direction and a free arc height H0 extending perpendicularly to said support surface and to said length extension xH,
• said anvil roll further comprising a pinching device comprising at least two compression jaws positioned radially outwardly of said support surface, and adapted to apply a transverse compression force along a y-direction perpendicular to said length and height extension of said arcs at a pinch point in said side portions of said arcs,
• thereby essentially preventing movement of said arc wire in said pinch point,
• said pinching device further being adapted to transmit z-directional forces applied to said upper arc portion and via said first or second side portion through the pinch point to said support surface.