US2021229948A1PendingUtilityA1

Winding core for webs and rolls on same

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Dec 29, 2015Filed: Dec 28, 2016Published: Jul 29, 2021
Est. expiryDec 29, 2035(~9.4 yrs left)· nominal 20-yr term from priority
Inventors:Joshua M. RetterathRonald W. AusenRamasubramani Kuduva Raman Thanumoorthy
B65H 75/10B65H 2701/1752B65H 75/28B65H 2701/514
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PatentIndex Score
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Claims

Abstract

A winding core comprising: (a) a cylindrical tube having an outer surface and a longitudinal axis; and (b) a core covering comprising a polymeric netting having opposing interior and exterior sides disposed on the outer surface of the cylindrical tube, wherein the polymeric netting comprises an array of a plurality of polymeric ribbons and a plurality of polymeric strands arranged in sheet form with each polymeric ribbon bonded to one or two adjacent polymeric strands and each polymeric strand bonded to one or two adjacent ribbons. Also, rolls of web material wound upon such cures in roll form.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A film winding core comprising: (a) a cylindrical tube having an outer surface and a longitudinal axis; and (b) a core covering comprising a polymeric netting having opposing interior and exterior sides disposed on the outer surface of the cylindrical tube, wherein the polymeric netting comprises an array of a plurality of polymeric ribbons and a plurality of polymeric strands arranged in sheet form with each polymeric ribbon bonded to one or two adjacent polymeric strands and each polymeric strand bonded to one or two adjacent ribbons, wherein:
 (1) each polymeric ribbon has a width, height, and length such that the length is longer than the width and the height and is of elongate form defining a longitudinal axis;   (2) each polymeric strand has a width, height, and length such that the length is longer than the width and the height and is intermittently bonded multiple times to one or two adjacent polymeric ribbons; and   (3) the interior side of the polymeric netting is facing the outer surface of the cylindrical tube.   
     
     
         2 . The winding core of  claim 1  wherein the polymeric netting is oriented such that the longitudinal axes of the polymeric ribbons are substantially parallel or substantially perpendicular to the longitudinal axis of the cylindrical tube. 
     
     
         3 . The winding core of  claim 1  wherein the polymeric netting is bonded to the outer surface of the cylindrical tube with an intermediate adhesive. 
     
     
         4 . A roll of film, comprising: (a) a film winding core of  claim 1 ; and (b) a web of film wound around the film winding core.

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