A PROCESS FOR MAKING IN CONTINUOUS PRODUCTION FIBROUS WEBS WHICH ARE CORRUGATED ALONG THE MACHINE DIRECTION

    公开(公告)号:US20230264448A1

    公开(公告)日:2023-08-24

    申请号:US18010768

    申请日:2021-06-28

    Applicant: Giorgio TRANI

    CPC classification number: B31F1/22 B31F2201/0733

    Abstract: Process for continuously producing ribbons of corrugated fibrous material, includes:

    starting from a continuous ribbon of fibrous material having transversal extensibility of not less than 8%,
    advancing the ribbon between a pair of forming rollers presenting ribs alternating with grooves, and having a center distance such that the ribs of one roller are partially housed within the grooves of the other roller and define between them a corrugated interspace having a thickness greater than the thickness of said ribbon and a width substantially equal to the width of the flat ribbon, which at the exit presents a longitudinal undulation obtained by transversal stretching thereof,
    passing the longitudinally corrugated ribbon thus obtained between a pair of stabilizing rollers with complementary ribs and grooves interpenetrating such as to present a distance between them less than the thickness of the ribbon thereby subjecting the ribbon to a stabilization compression of the obtained corrugations.

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