It can ensure that the tension of elastic belt is consistent. The belt spacing is even and adjustable, and the number of belt is optional.The length of the belt and the magnitude of the tensioning force can be easily adjusted before operation. Operating steps: Convey belt (button), outside nailing, back pulling (button), inside nailing, cutting belt.There are 12 automatic tensioning machines withelasticband.ZLD006 is especially applies to rectangular frames.