Patent ID: 6983846
Filing Date: 2006-01-10
Classification: B29C,B29K,B29L,B65D,Y10T

Abstract:
1. A top frame assembly comprising: an upper member having a central opening defined therethrough, the upper member having a generally planar upper wall, the central opening extending through the upper wall, a first plurality of ribs extending downwardly from the upper wall, and a first mating surface; and a bottom member having a generally planar lower wall, the central opening extending through the lower wall, a second plurality of ribs extending upwardly therefrom, and a second mating surface, wherein the first and second mating surfaces are attached to each other; and at least one insert member disposed between the upper wall and the lower wall for providing strength thereto, the at least one insert member including an upper surface abutting the upper member and an opposite lower surface abutting the lower member.