perforator unit
four independent pneumatic perforate the the film in order to facilitate the subsequent film sealing operations
figure
first puller unit
this unit pull the film though the pack forming unit and the bottom sealer
longitudinal
reel holder shaft unit
compensator arm the unit maintains the tension of the as it passes though the various unwind rollers and activates the unwind if more or less film is requried
hermetically closes the pack by sealing the top edges