US Patent 7724385 System for preserving security while handling documents

A mail handling system for handling mail pieces in a mail handling area is presented. The system avoids breaching confidentiality of the mail pieces, and includes a view port device, for providing filtered visual access to a portion of the mail handling area while at least some information contained in the mail pieces is filtered out. The system also includes a manual access area, for allowing manual access to the mail handling area while unfiltered visual access to the mail handling area is obstructed.