Label,Description, Suitable Products, Seam pattern. 53700BZ4031, Single Needle Double Locked Stitch Machine, Top and Bottom Feed, Guides for Filler Cord,  Ourbags making machines are suitable for short, medium and long run works. We can make office envelopes, courier envelopes, as well as central seam  Roll-o-Maticis a worldwide manufacturer of high-technology equipment for production of bags on rolls and winders for industrial film.