Roll-fed LSB330 Automatic high speed square bottom paper bag machine


Roll Feeding square bottom paper bag making machine forming the paper bag in one process from printed or unprinted roll paper , side gluing, roll folding, roll paper cutting, bottom folding, bottom gluing, bottom forming, bag formation at a stroke. This machine controls by PC programmable servo motor through the human-machine touch screen interface. It can produce various of specifications paper bags. This machine have advantages of high speed, quickly replace the paper bag specifications, more wide range adjusting etc. It is an ideal machine for producing food bag, shopping handles bag.


  1. The human-machine touch screen interface, the work condition can be shown in real- time.
  2. Equipped with accurate servo motor drive, it makes the machine run steadily and efficiently.
  3. Pneumatic paper reel lifting device make paper reel changing easy.
  4. Automatic constant tension control system. The tension will be just right from beginning to end.
  5. Double photoelectric sensor limit automatic correction control system and deviation rectification stability, energy saving, long life.
  6. Rotary serrated cutter (or flat-blade cutter) with elliptical gears is used for cutting, Thumb buttons, appressed bottom cutting device, bag type have many choices.
  7. Don’t stop machine side clamp, CAM synchronous adjustment of structure, the adjustment will become more intuitive, more simple, more time saving.
  8. Glue roller air defense coating control, avoid gluing on besmear brushs hub surface directly, reduce unnecessary trouble.
  9. Accurate colors tracking system, replace the paper roll, downtime, blackouts, without human intervention, the machine will automatically positioning operation, color errors automatically shut down.
  10. Automatic lubricating oil supply system.
Type LSB-330
Bag Width(W) 120-330 mm
Bottom Size (H) 70-180 mm
Cutting Length (C) 270-530 mm
Bag Length (L) L=C-(H÷2+15~25)
Max. Speed 220 pcs/min
Paper Roll Width 400-1050 mm
Max. reel weight 600 Kg
Max.Roll Diametr 1200 mm
Reel inner diameter 76 mm
Paper specification 60-170 gsm
Web edge control system Double photoelectric automatic correction control system
Web tension control system automatic constant tension control system
Air pressure ≥0.12cmm, 0.4~1Mpa
Driven motor Double servo motor
Electric 380V,50 Hz, 3 phase
Power 11 KW
Weight 5500 Kg
Overall dimension(L×W×H) 8250×1800×1800 mm

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