An embodiment of the present invention comprises a mailpiece sorting apparatus video coding station, inserter system, return mail workstation and a web server for interconnecting several components of the system. The compounds used are preferably mu opioid receptor antagonists such as cyprodime. The barrel and retaining ring are provided with a custom coarse thread which both allows quicker removal and replacement of the air cap as well as substantially eliminating the ability to cross-thread the air cap on the barrel. The method and the plant provide that, through a central control unit of the plant, starting from predefined setting data, operating parameters of the sections of the plant are determined. Further, an underfill is filled between the substrate and the chip to encapsulates the bumps, while the processing temperature is kept between 100\xb0 C.