| abstract |
A seat backrest frame (10) having an integrally formed rigid peripheral frame structure which, relative to an in-use orientation, has a plurality of frame portions, namely a pair of side portions (20) and transverse portions (22 and 24). Each of the frame portions (20, 22 and 24) has an elongate channel form defined by respective side flanges (20a, 22a, 24a, 20b, 22b, 24b), and an interconnecting web (20c, 22c, 24c). Each web (20c, 22c, 24c) being disposed forwardly of the frame structure with the channel of each frame portion opening rearwardly. Each side portion (20) defines a forwardly projecting wing (36) over at least the lower half of its length, such that the depth of each side portion channel in at least the region of the wing (36) is substantially greater than the depth of the channels of the transverse portions (22 and 24). |