DISCRIMINATING WEB MATERIAL DISPENSER

摘要

An automatic product dispenser determines if the roll loaded into the dispenser is approved for use with the dispenser. The core of a roll contains a feature that alters an electromagnetic field created proximate the core. The alteration of the electromagnetic field may then be used to determine if the core, and thus the roll, is usable with the dispenser. The feature is designed such that it is damaged once product is completely dispensed from the roll thereby preventing replenishment and reuse of a spent roll.