Patent ID: 7132037

Claim:
Apparatus for forming an extended nip between a mating roll and a shoe roll for treating a product web, the shoe roll having a stationary carrier and a flexible roll shell which can rotate around the stationary carrier and which, in the region of the extended nip, is supported on a hydrodynamically lubricated running surface of a press shoe guided on the carrier, said apparatus comprising a device for applying lubricant to the inner side of the roll shell is provided, and, in an inlet region, the press shoe has a plurality of holes in the press shoe which are arranged transversely with respect to the machine running direction, said holes being connected to a lubricant supply in order to receive lubricant and deliver said lubricant to the running surface, said holes having restrictors therein whose resistance provides a pressure drop of 5 to 15 bar, wherein the holes are arranged with their outlet openings in an inlet region of the shoe, where the pressing pressure changes from a region with a high pressing pressure slope into a region with a low pressing pressure slope.