Improved machine and method for longitudinal compressive treatment of webs employing a two roll drive nip. Specially arranged initial parts of one or a pair of stationary retarding members are positioned at the exit side of the drive nip in the region of minor divergence of the roll surfaces to provide...http://www.google.com.au/patents/US4142278?utm_source=gb-gplus-sharePatent US4142278 - Compressive treatment of web materials
