Sheet processing apparatus

A sheet processing apparatus comprising:

• a first sheet processing module and a second sheet processing module which are reversely arranged, each of said first and second sheet processing modules including
• a main frame assembly which defines an entrance port for receiving a sheet, a first communication port, and a first transport path for transporting the sheet received from said entrance port to said first communication port, and
• an identifying unit disposed to identify the sheet on said first transport path for admission of the sheet qualified by said identifying unit to said first communication port;
• a connecting module configured for connecting said first and second sheet processing modules in such a manner that at least one of said first and second sheet processing modules is detachably mounted on said connecting module, said connecting module including
• a connecting frame assembly which defines
• a first interconnection port and a second interconnection port, each of which is disposed to receive the sheet from said first communication port of a respective one of said first and second sheet processing modules, and
• a second communication port, and a first diverter mechanism which is mounted to said connecting frame assembly, and which is configured to permit sheet transport between said second communication port and a selected one of said first and second interconnection ports;
• and
• a storage module defining a third interconnection port for receiving the sheet from said second communication port, and a storage space for storing the sheet received from said third interconnection port.