초록

A method and apparatus for making building panels includes means for positioning upper and lower rigid sheets of material, such as paper pulp, in spaced relation so that foamable material disposed between the sheets can move into gripping engagement with both sheets as it expands and solidifies.

대표청구항 ▼

A composite panel comprising a lower rigid sheet, a rigid unit disposed in spaced relation to said lower sheet and consisting of a first foam block secured between an upper rigid sheet and a thin membrane, a second foam block adhered directly to said lower sheet and to the membrane of said unit and

A composite panel comprising a lower rigid sheet, a rigid unit disposed in spaced relation to said lower sheet and consisting of a first foam block secured between an upper rigid sheet and a thin membrane, a second foam block adhered directly to said lower sheet and to the membrane of said unit and disposed between said lower sheet and said unit, said first foam block adhering to said upper rigid sheet and said membrane as the foam thereof expands and solidifies, said second foam block adhering to said lower sheet and said membrane as the foam thereof expands and solidifies, and a first stiffener bar along each side of said second foam block in gripping engagement with said second block, said first stiffener bars being substantially disposed between said membrane and said lower rigid sheet, said second foam block adhering to said first stiffener bars as the foam thereof expands and solidifies.