Patent ID: 6251226
Filing Date: 2001-06-26
Classification: D21F

Abstract:
A paper or cardboard manufacturing plant, comprising:a formation tape or table;a primary fibrous mix source for storing a primary fibrous mix of a material adapted to produce paper or cardboard, said primary fibrous mix source being arranged above said formation tape or table;at least one manifold, which can be arranged proximate to the formation table;at least one jet nozzle which can be fed by said at least one manifold and is arranged above said formation tape or table so that said jet nozzle can be angularly adjusted with respect thereto;a feeding duct for a secondary fibrous mix of a material adapted to produce paper or cardboard, and a return duct from said at least one manifold;a feeder reservoir for said secondary fibrous mix; anda secondary fibrous mix source arranged to supply the feeding duct and to receive material discharged from the feeding duct for return from said at least one manifold, said feeding duct being directly connected to said feeder reservoir, said at least one manifold being constituted by a tubular body having a four-sided cross-section.