1
Roger E Larson: Method of making foam core building panels in a continuous operation. Jack M Wiseman, April 8, 1986: US04581186 (51 worldwide citation)

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.


2
Roger E Larson: Foam building panels. Jack M Wiseman, July 29, 1986: US04602466 (15 worldwide citation)

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. '


3
Roger E Larson: Apparatus for making building panels in a continuous operation. Jack M Wiseman, August 19, 1986: US04606715 (12 worldwide citation)

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.



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