04581186 is referenced by 49 patents and cites 36 patents.

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.

Title
Method of making foam core building panels in a continuous operation
Application Number
450732
Publication Number
4581186
Application Date
July 30, 1984
Publication Date
April 8, 1986
Inventor
Roger E Larson
P.O. Box 7123, Carmel, 93921
CA, US
Agent
Jack M Wiseman
IPC
B29C 39/18
B29C 67/22
View Original Source