APPARATUS AND METHOD FOR REALIZING A WEB OF FIBROUS MATERIAL
An apparatus for producing a web of fibrous material, characterised by comprising: - a roll (2) of metal material having its lateral surface provided with incisions (4) having a circumferential component, and rotated at a peripheral velocity Vi equal to the velocity of an upstream apparatus unit, said incisions (4) having a depth of 0.01-2.00 mm a width of 0.01 -2.00 mm a pitch 0.01-10.00 mm - at least one belt (8, 8') of compressible elastic material stretched between transmission rollers (10) and made to advance at a velocity V2 less than the peripheral velocity Vi of said metal roll (2), where Vi/v2 lies between 1.05 and 1.40, - at least one presser roller (12, 12') of metal material rotating at a peripheral velocity v2, associated with presser means acting in the sense of pressing said belt (8) against said metal roll (2) with a pressure between 1 kg and 200 kg per centimetre width of the contact band between said belt (8, 8') and said metal roll (2), - means for feeding a sheet (6) of pliable fibrous material between said belt (8, 8') and said metal roll (2), said belt (8, 8') having a degree of elongability in the longitudinal direction not exceeding 5% at least on that side intended to adhere to said presser roller (12, 12'), dimensional stability along its entire length, thickness between 1 cm and 10 cm, and hardness between 24° Shore and 70° Shore.