Abstract: A description is given of a device for preparing winding mandrels for winding machines or the like, comprising, in combination: an extraction station (9) with an extractor mechanism for extracting a mandrel from one or more rolls of web material and for inserting the extracted mandrel into a tube (T); a cutting station (11) with cutting means (71) for cutting the tube (T) fitted on the mandrel into a set of tubular cores aligned on said mandrel; an insertion station (13) with insertion members (127) for inserting the mandrel with the tubular cores into a winding machine or the like.

Abstract: The rewinding machine comprises a pair of lower winding rolls (11, 13) defining a winding cradle, which are movable from an upper position toward a lower position during the winding of a reel (R), in order to keep the axis of the developing reel in an essentially fixed position.

Abstract: A kneader for paper products and/or similar waste products, comprising a tank provided with an impeller on the bottom, and also provided with a helix or propeller element, which is not coupled with said impeller and is apt to feed the worked product to the same impeller, said helix or propeller element being substantially disposed in an axial relation to said impeller.