POLY BAG AND POLYWRAP DETECTION SYSTEM

摘要

A system for detecting Poly-Bag and Poly Wrap on mail pieces, intended to be a sub-assembly on a mail unit open system that automatically opens wrapped bundles of either letter or flat mail. The system generally includes two orthogonally-opposed but otherwise identical Poly Bag Detectors both controlled by a programmable controller and deploying a swinging pendulum test, plus a Poly Wrap detector employing a rolling friction wheel test.

主权项

1. A method for analyzing a mail piece and for determining if said mail piece is wrapped in poly-plastic material, comprising the steps of:
impacting said mail piece with an impact arm bearing an accelerometer; sensing the impact energy of said impact arm during said mail piece impact to determine an impact profile; analyzing said determined impact profile and distinguishing an impact against a poly-plastic material from an impact against paper.