Patent ID: 7909067

Claim:
A method for making a reinforcement mesh composed of a plurality of reinforcement bars held at a desired mutual distance from each other for use in concrete structures, said method comprising: providing the plurality of reinforcement bars; placing two wires rolled up on respective coils mounted diametrically opposite from each other on opposite sides of a rotatable shaft and providing a wire guide having a pair of wire guide elements for guiding each of the two wires in a direction towards a twisting point, the space between the wires leading to the twisting point forming an opening; inserting a reinforcement bar into the opening with a first wire above the reinforcement bar and a second wire positioned below the reinforcement bar; rotating the shaft such that the wire guide elements twist the two wires and at the same time moving the reinforcement bar in a direction away from the twisting point a predetermined distance, thereby twisting the two wires around the individual reinforcement bar to clamp and hold the reinforcement bar in place; the moving of the reinforcement bar away from the twisting point clearing the opening for inserting another of the plurality of reinforcement bars into the opening, and, repeating the above steps for forming a mesh composed of a plurality of reinforcement bars mutually spaced apart at the predetermined distance and held by the twisted wires.