Side Gusset Coffee Bags Machine | ±1g Accuracy & <1% O₂

Coffee packaging is among the most technically demanding flexible packaging applications due to the product's sensitivity to oxygen, moisture, and light—plus the challenge of fresh-roasted coffee releasing CO₂ that can inflate and burst sealed bags. ECHO Machinery has developed coffee-specific packaging solutions that address each of these requirements on a single integrated machine platform. The one-way degassing valve application station precisely positions the valve on the bag interior using an optical registration system that compensates for bag position variations. The valve is typically placed in the upper third of the bag where it remains above the coffee fill level. Nitrogen gas flushing uses a multi-stage approach: an initial flush displaces ambient air before filling, a secondary flush purges the headspace after filling, and an optional tertiary flush creates positive nitrogen pressure that prevents oxygen ingress through micro-channels in the seal area during cooling. The entire gas flush cycle is completed within the machine's normal cycle time, maintaining production speed. For ground coffee, the filling system includes a dust extraction hood.