Foam laminates

Claim 1

A foam laminate comprising a rigid layer of foam confined between an upper flexible skin and a substantially rigid but bendable lower skin preformed in the shape of a pan having a base bounded at each of two opposite edges thereof by an upstanding, substantially vertical straight rib, the base-forming portion of the ribs bent to form a profiled base comprising alternate upstanding ridges and depressions and joining means adapted to join one pan with a similar adjacent pan comprising a first rib and a second rib, said first rib bent to form, near the foot thereof, a substantially horizontal, inwardly extending, relatively open first hairpin bend, the bottom arm of the first hairpin bend extended further outwardly under the adjacent ridge of a similar adjacent pan and then upwardly until it abuts the undersurface of the adjacent ridge, then bent back on itself in a tight second hairpin bend to form part of the base of the pan, said second rib bent to form, near the foot thereof, a substantially horizontal, outwardly extending, relatively tight third hairpin bend, the inwardly extending bottom arm of the third hairpin bend further bent upwardly near the foot of the vertical portion of the second rib and then inwardly to form an upstanding ridge adjacent to the vertical portion of the rib, and then extended inwardly, thereby forming the remainder of the base of the pan, the outwardly extending hairpin bend of the second rib being adapted to be pushed into and engaged by the inwardly extending relatively open hairpin bend of the first rib of a similar adjacent pan, that when viewed from their respective undersides, the joined pans present a substantially unbroken profiled surface with a hollow space bounded on the top by the said adjacent ridge and on the bottom by the further outwardly extending bottom arm of the first hairpin bend of the first rib.