Device for treating a material web

An apparatus for treating a material web, in particular for influencing gloss and / or smoothness of a paper or cardboard web or for the dewatering of paper or nonwoven web and this device includes at least one extended nip between a Breitnipeinheit with at least one extended in the web running direction Pressnipschuh and a is formed over the Breitnipschuh guided rotating flexible band and a complementary counter-unit. The Breitnipschuh is sectioned in the web running direction. For the variable setting of the resulting shoe width in the web running direction, a part between the inlet side and the outlet side arranged shoe segment shoe segments between a working position and a rest position is at least adjustable. The shoe segments with respect to the counter unit radially oriented and at least partially guided along a concentric to the circumferential contour of the preferred besthenden from a mating roll counter unit part-circular path.