The contra-positioned glued face paper and under-packing paper are sent into folding machine by conveyor belt. Folding is finished automatically in one time by firstly folding left and right edge and secondly front and back.

1. Feed the glue paper and body paper into the flanging belt, fold left and right side, then the paper is integrated closely via the drum of the first layer.

2. After being over-turned on light-controlled conveyor belt, the paper reciprocates to the drum of the second layer to perform flanging of the backside.

3. After operated by the back forward gas baffler, the paper reciprocates to the drum of the third layer to perform flanging of the front side.

4. The steel roller laminated with Teflon, not easy to adhibit the glue and durable in use.