| 摘要 |
A spring network comprises rows of springs (1, 2) extending parallel to one another, each row being made from a single spring wire. Each spring consists of two opposed generally spring portions of opposite hand interlinked by looping at intermediate turns (5). Each spring has head and foot turns (i.e. 1d) of generally U shape with the limbs of these turns lying in respective bounding planes of the network. The rows of springs (1, 2) are interconnected by transverse wires (7, 8) of zig-zag form at the location of the inter-linking (5, 6) of the opposed spring portions. <IMAGE> |
