a packaging machine having multiple modules each performing a separate function in a packaging sequence . the modules are building blocks that are assembled to define a packaging machine . an infeed conveyor / lane divider module , a blank magazine and infeed tray module , a collation and synchronization module , a gluing and closing module , a turning module , a stacking module , a film cutting module , a film wrapping module and a heat shrink module are selectively assembled in various combinations to define machines that pack articles into trays , wrap the articles with heat shrink film , turn the packages , stack the packages for multi - tier packages , or any combination of these functions . the modules each have an independent conveyor driven by an onboard servo drive . the servo drives are coordinated to provide controlled flow of articles from module to module . the servo drives are all connected to and controlled by a supervisory computer such that no mechanical connection between modules is required .