Siding construction

Claim 1

IN A GENERALLY RECTANGULAR MULTIPLE PANEL CLAPBOARDSIMULATING SIDING UNIT ADAPTED TO INTERLOCK WITH OTHER UNITS OF THE SAME TYPE ALONG OPPOSITE TERMNAL EDGES, SAID UNIT COMPRISING AN INTEGRAL PIECE OF MATERIAL PROVIDING A PLURALITY OF FLAT, PARALLEL, CLAPBOARD-SIDE-SIMULTAING PANEL PORTIONS AND A PLURALITY OF FLAT, PARALLEL, CLAPBOARD-EDGE-SIMULATING STRIP PORTIONS, SAID PANEL PORTIONS BEING LOCATED IN SPACED PARALLEL PLANES PROVIDING PARALLEL EDGES WITH ADJACENT EDGES OF SAID PANEL PORTIONS SPACED FROM ONE ANOTHER IN A PLANE PERPENDICULAR TO THE PLANE OF SAID PANEL PORTIONS AND SAID STRIP PORTIONS BEING LOCATED IN SPACED PARALLEL PLANES GENERALLY PERPENDICULAR TO THE PLANES OF SAID PANEL PORTIONS AND EXTENDING BETWEEN ADJACENT EDGES OF SAID PANEL PORTIONS AND ALONG ONE TERMINAL EDGE OF SAID UNIT WITH STRIP PORTIONS LOCATED ALONG OPPOSITE EDGES OF A PANEL PORTION EXTENDING IN OPPOSITE DIRECTIONS THEREFROM, THAT IMPROVEMENT COMPRISING AN INTEGRAL FLANGE PORTION ON ONE SIDE OF THE STRIP PORTION LOCATED BETWEEN ADJACENT EDGES OF ADJACENT PANEL PORTIONS OF SAID UNIT, SAID FLANGE PORTION BEING SPACED FROM THE ONE OF SAID ADJACENT PANEL PORTIONS EXTENDING FROM SAID STRIP PORTION IN THE SAME DIRECTION AS SAID FLANGE PORTION, SAID FLANGE PORTION, STRIP PORTION AND SAID LAST MENTIONED PANEL PORTION THEREBY FORMING AN INTEGRAL TRI-PLANAR CHANNEL, SAID STRIP PORTION BEING SLOTTED INWARDLY FROM ITS END FOR A PREDETERMINED DISTANCE, SAID SLOT BEING LOCATED PARALLEL TO AND BESIDE SAID FLANGE ON THE SIDE THEREOF TOWARD SAID PANEL PORTION WHICH EXTENDS FROM SAID STRIP PORTION IN THE SAME DIRECTION AS SAID FLANGE PORTION, SAID SLOT RECEIVING THE FLANGE PORTION OF AN ADJACENT OVERLAPPING SIDING UNIT POSITIVELY TO LOCK TOGETHER ADJACENT SIDING UNITS AT THE STRIP PORTIONS THEREOF LOCATED BETWEEN THEIR PANEL PORTIONS.