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.

纸张气挡板之作用，再复至第二层滚筒边折边。

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.

纸张气挡板之作用，再复至第二层滚筒边折边。