COILING APPARATUS AND METHOD

摘要

Pre-straightening the wire before storing it in loops inside the cylindrical drum 34 allows for a more consistent pocket spring, and ultimately a flatter spring unit/mattress as any pre-stressing of the wire, caused by the drawing process used to manufacture it, is neutralised leaving the wire largely stress-free. This means that there is no need to compensate for, or break, the forces inherent in the wire before feeding it to the coiler. Accordingly the accumulator is not necessary and the wire supply can be positioned together with the coiling device, preferably above or below the coiling device, to take up less footprint in the factory.