Patent ID: 6210621
Filing Date: 2001-04-03
Classification: B29C,B29L,B65D

Abstract:
A method of making a plural-chambered dispensing tube comprising a tube body, a tube head and a partition which divides the tube into two discrete chambers, the method comprising:(1) providing a hollow tube body, a partition and a mandrel, the mandrel being a tube-shaped structure comprising a head, a body and a slit extending in length-wise and cross-wise directions through the mandrel head and a portion of the mandrel body,(2) charging said mandrel with the partition to form a partition-supporting mandrel structure, a first portion of the partition fitting within the mandrel slit and a second portion of the partition resting against an outer side wall of the mandrel body;(3) charging the partition-supporting mandrel structure with the tube body assembly having a front end comprising a front circumferential end of the tube body and a head of the partition, the second portion of the partition being disposed between the outer side wall of the mandrel body and an inner side wall of the tube body;(4) providing a liquid resin material to be molded into a tube head and inserting the front end of the assembly into said resin material;(5) molding the tube head from said resin material while said front end of the assembly is disposed within the resin material so as to mold the tube head onto the front end of the assembly such that (i) edges of the partition head are bonded to an interior surface of the tube head to divide the tube head into two discrete chambers and (ii) the tube head is bonded to the front circumferential end of the tube body;(6) effecting bonding between the second portion of the partition and corresponding portions of the inner side wall of the tube body, thereby forming the plural-chambered dispensing tube.