... folding part of hard cover (hard bookcover, box cover, calenders, files cover etc..) forming. After aligned with body paper, the upper glue paper ... at a time automatically.First process: Feed the glue paper and body paper into the flanging belt, foldleftand right side, then the ... : After operated by the front forward gas baffler, the paper reciprocatesto the drum of the second layer to perform flanging ...