Paper tube with flange

Abstract

A paper tube with a flange which comprises a winding trunk outer tube 1, a flange 2 having radial cuts 3 extending radially from the central part, and a pressing inner tube 5 for mounting the flanges 2 at the ends of the winding trunk outer tube 1, these components all being made of paper, so that the pressing inner tubes 5 are inserted, through the radial cuts 3 of the flanges, into the winding trunk outer tube 1 to be tight-fitted therewith via a folding part 3 a defined by the radial cuts 3, and the folding parts 3 a are fixed between the outer tube 1 and inner tubes 5.

What we claimed is:  
     
         1 . A paper tube with a flange which comprises a winding trunk outer tube, a flange having radial cuts extending radially from the central part, and a pressing inner tube for mounting the flanges at the ends of the winding trunk outer tube, these components all being made of paper, so that the pressing inner tubes are inserted, through the radial cuts of the flanges, into the winding trunk outer tube to be tight-fitted therewith via a folding part defined by the radial cuts, and the folding parts are fixed between the outer tube and inner tubes.  
     
     
         2 . A paper tube with a flange as set forth in  claim 1  wherein an adhesive is applied to both of inner and outer sides of the folding parts.  
     
     
         3 . A paper tube with a flange as set forth in  claim 1  wherein the winding trunk outer tube has a retaining bore for an initial end of the object to be wound.