Patent ID: 8122630
Filing Date: 2012-02-28
Classification: E01F,G09F,Y10T

Abstract:
1. A rib-engaging support made from a unitary web, comprising: a serial succession of four panels, including two inner panels and two outer panels, each panel having the shape of a isosceles trapezoid, with a base side and a top side parallel to each other, and with a pair of equal sides extending between the base side and the top side; the inner panels having the same, first size and joined together at their bases; the outer panels having a second size larger than the first size, the top sides of the outer panels joined to the top sides of respective inner panels; the web folded such that the inner panels are folded one on top of the other and the outer panels are folded one on top of the other, with the inner panels on top of the outer panels; and a rib-receiving pocket formed between the inner panels and the outer panels.