Third process: 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.

纸张经前推气挡板之用，再往复层滚筒完成后边折边。

Second process: After operated by the front forward gas baffler, the paper reciprocates to the drum of the second layer to perform flanging of the backside.

纸张经后推气挡板之用，再往复层滚筒完成前边折边。

This paper gives the calculation method for the standard parameters such as internal surface area,volume and quality etc.of toriconical head.

本文折边锥形封头内表面积、容积和质量等标准参数的计算方法。

Seal off the edgefold by using a new special heat-pressing technology, enhance prevention of side leakage.

独有的新型热压密封折边技术，更加有效的防止侧漏，使用更加放心。