Pre-Cut Sharp Bottom Paper Bag Making Machine with Inline Window Pasting
This pre-cut sharp bottom paper bag making machine is a roll fed machine with a smooth cutting line and an inline window pasting unit. It converts kraft paper, glossy paper, medical paper and greaseproof paper rolls into sharp bottom paper bags in one pass, and the window patch is glued during the same run – no separate windowing machine and no second handling of the bags.
The sharp bottom paper bag making machine is servo motor driven and PLC controlled, built for high speed continuous production in JD-270 and JD-350 versions covering bag widths from 80 mm to 350 mm. It is widely used for bakery and food paper bags with clear window, kraft food packaging bags, and medical paper bags where a clean, burr-free bag edge is required.
Sharp Bottom Paper Bag Making Machine – Made Bags with Window
The bags below are the typical output of the JD-270 and JD-350 pre-cut sharp bottom paper bag machine:
- Bakery paper bag with clear plastic window, window pasted inline
- Food packaging paper bags for bread, pastry and snacks
- Kraft sharp bottom bag with a smooth cutting line and no burr on the bag edge
- Medical paper bag and greaseproof paper bag for food service
- Bag widths from 80 mm to 350 mm on JD-270 and JD-350
Bag size range: Bag Tube Length: 117 – 765 mm | Bag Width: 80 – 350 mm | Side Gusset: 20 – 120 mm | Paper: 35 – 80 gsm
How Pre-Cutting Sharp Bottom Paper Bag Making Machine Improves Bag Quality
Because the paper roll is cut to length before the bag is formed, the bag mouth stays square and the cutting line is clean on every bag. The inline window unit places and glues the film patch while the bag tube is being formed, which saves one complete production step compared with buying a separate windowing machine. Paper types accepted include kraft paper, glossy paper, medical paper and greaseproof paper, so the same pre-cut sharp bottom paper bag making machine covers bakery, food service and medical packing.
TWMACHINE builds the machine as a factory direct supplier, and window film width, film thickness and bag size range can be confirmed against your own bag sample before shipment.
Related paper bag machines from TWMACHINE: V Bottom Paper Bag Making Machine | Square Bottom Paper Bag Making Machine | Square Bottom Paper Bag Machine with Inline 4 Color Printing
Need a quotation or a running video? Contact TWMACHINE for the factory price and the latest catalog.
Main Specifications
Model JD-270 JD-350 Bag Tube Length(mm) 117-360/
365-450155-400/
405-765Bag Length(mm) 100-355/
360-445150-395/
400-760Bag width（mm） 80 – 270 80 – 350 Side Gusset(mm) 20-120 20-120 Bag Flap Height(mm) 17 17 Thickness（mm） 35-80g/m2 35-80g/m2 Machine Speed 50-600pcs/min 50-500 pcs/min Paper roll width (mm) 220 – 810 220 – 970 Max. Paper Roll Dia. Φ1200mm Φ1200mm Window Film width 50-200mm 50-200mm Film thickness (mm) 0.012-0.037 0.012-0.037 Max. Film Diameter Φ500mm Φ500mm Machine Dimension(mm) 7100*2050*1850 8500*2250*1850 Machine Weight(kg) 5000 6000 Voltage 3PHASE 380V 3PHASE 380V Specifications:
1) Auto Loading
2) Servo motor
3) Color Mark Sensor
4) Windown film pasting
5) Multi-LanguageOptions:
1) 2 / 4 colors Printing Unit inline
2) Plastic Window function
Paper types available: kraft paper, glossy paper, medical paper, greaseproof paper. Inline window pasting and handle devices are optional.
High Speed Sharp Botton Paper Bag Machine with Servo Motors
This is JD 250-350 series, from 250 -350mm bag width.The working priciple is pre-cutting the paper roll then make paper bags. The cutting line is smooth and neet.PP window bag is popular in the bread and snacks shops.