Systems and methods for residue collection with improved letter handling capability

A residue collection system for collecting residues, the system comprising:

• an aerosol chamber including:
• a housing which substantially encloses an internal volume;
• a means for maintaining said internal volume at a negative pressure;
• a first means for compressing located within said internal volume and capable of compressing a mail piece passing through said first means for compressing so as to expel air from internal said mail piece;
• a second means for compressing located within said internal volume and capable of compressing said mail piece passing through said second means for compressing so as to expel air from internal said mail piece;
• and
• means for providing said mail piece to said housing via gravity;
• means for transporting at least a portion of said air expelled from internal said mail piece from said internal area to a residue detector.