Apparatus and method for realizing a web of fibrous material
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United States of America Patent
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app pub date -
Jul 22, 2014
filing date -
Jul 22, 2013
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Abstract
An apparatus for producing a web of fibrous material, characterised by comprising: includes a roll having incisions with a depth of 0.01-2.00 mm a width of 0.01-2.00 mm and a pitch 0.01-10.00 mm, and rotated at a peripheral velocity v1 equal to the velocity of an upstream apparatus unit; a belt stretched between transmission rollers that advances at a velocity v2 less than v1 where v1/v2 lies between 1.05 and 1.40; a presser roller rotating at a peripheral velocity v2, associated with a presser system acting to press the belt against said the metal roll with a pressure between 1 kg and 200 kg per centimeter; a system that feeds a sheet of pliable fibrous material between the belt and the roll, the belt elongating longitudinally no more than 5% dimensional stability along its entire length, and thickness between 1 cm and 10 cm, and hardness between 24° Shore and 70° Shore.
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