Curved sandwich panels, method of making same, and method of making articles therewith

Claim 1

A BOAT FABRICATED FROM A PLURALITY OF PANELS INCLUDING AT LEAST ONE BOTTOM PANEL AND A PAIR OF SIDE PANELS, EACH SAID BOTTOM AND SAID SIDE PANEL HAVING A COMPOUND CURVATURE, EXTENDING THE FULL LENGTH OF THE BOAT AND COMPRISING A SYNTHETIC RESINOUS FOAM CORE AND A COVER SHEET ADHERED TO EACH SIDE SURFACE OF SAID CORE, SAID SIDE PANELS SECURED TO EACH EXPOSED EDGE OF SAID BOTTOM PANEL AND TO EACH OTHER AT THE FORWARD END OF THE BOAT IN WATERTIGHT RELATIONSHIP, SPLINES BRIDGING THE LINE OF JUNCTURE BETWEEN EACH SAID SIDE PANEL AND SAID BOTTOM PANEL, SAID SPLINES BEING LOCATED IN THE MEDIAN PORTION OF THE CORES OF SAID SIDE AND BOTTOM PANELS, ADHESIVELY SECURED THERETO, EXTENDING SUBSTANTIALLY THE FULL LENGTH OF SAID JOINT, AND HAVING A WIDTH DIMENSION IN THE RANGE OF ONE-HALF TO TWICE THE THICKNESS DIMENSION OF SAID SIDE AND SAID BOTTOM PANELS, SAID ASSEMBLED BOTTOM AND SIDE PANELS DEFINING A BOAT CAVITY OPEN AT ITS REARWARD END, AND A REAR PANEL SECURED TO THE REARWARD ENDS OF SAID SIDE AND BOTTOM PANELS, THE CAVITY DEFINED BY SAID PANELS BEING FREE OF INWARD PROJECTIONS.