| 摘要 |
<p>A spring interior (21) comprising a plurality of longitudinally extending bands (22) of springs disposed side by side and connected together by helical lacing wires (23) in the top (25) and bottom (26) faces of the bands. Each band of springs (22) comprises a single length of wire formed into a plurality of substantially vertical coils (31) of springs interconnected by interconnecting segments (35, 36) of wire located alternately in the top and bottom faces of the bands. Each interconnecting segment (35, 36) comprises a longitudinally extending bridging portion (37), a pair of transversely extending end portions (38), and a transversely extending support structure (40). The corners (38a, 38b) defined by the intersections between the bridging portions (37) and the end portions (38) of the interconnecting segments are radiused by radii of differing dimension so as to colinearly align the bridging portions of each band of springs. Misalignment of the bridging portions of the bands of springs had heretofore reduced the durability of the spring interior (22).</p> |
