The lockformer pittsburgh machine is a multi function machine,mainly used for plate connection and the closure of circular duct of the bite processing. Can meet the requirements of various shapes of the wind duct manufacture bone type. The thickness of machined plates is 0.4-1.5mm. All gears, shafts, rollers are selected high-quality steel, after a rigorous heat treatment process, to ensure the durability of the machinery. It can meet the different requirements of users. According to the requirements, it can be made into a variety of square, rectangular thin plate duct, is a variety of sheet metal processing, wind pipe production and other indispensable mechanized equipment. The type of bite machine is divided into multi functional nip machine, joint angle nip machine, cuttings nip machine, flat mouth nip machine, elbow nip machine, etc.