bag envelope making machine:Wenzhou City Caishun Packaging Machinery Co., Ltd. produced ZD-520 big pocket envelope with silicone paper envelope making machine is applied to the production of 1-10# Chinese standard letters and similar paper bags.It can pasting the tongue of the envelope by double side tape and tape. It is the ideal equipment to paste the tongue of the Chinese-style paper envelopes or the bag products in similar specifications.