the hub to the periphery of the wash plate further each vane includes steep side walls 410 adjacent the neighbouring low sectors of the wash plate the upper face of an outer portion 412 of each vane is generally flat and the vane slopes down towards its outer periphery 414 to the level of the circular periphery 400 of the wash plate each steep side surface 410 of each vane is outwardly concave that is the side surfaces of each vane diverge more rapidly as the vane extends toward the outer periphery 400 of the wash plate furthermore the opposing side surfaces 410 of adjacent vanes facing toward one another across the low sector 406 between them are each concave relative to the other and relative to a radius extending from the centre of the wash plate the outermost portion of each sidewall hooks toward the adjacent vane so as to be inclined in advance of a radial plane of the wash plate the inventors have found that such side surfaces 410 aid in dragging the cloth items inward to the centre of the wash plate rapid oscillation of the wash plate provides a centrifugal pumping action inducing radially outward water flow such radial flow above the wash plate may inhibit inward movement of the laundry items and is detrimental to establishing the inverse toroidal rollover pattern the shape of the side surfaces 410 also counteract the centrifugal pumping action of the.