Alcan Aluminum Corporation

Thomas W Dawe

Thomas O Johnstone

Interlocking vinyl siding panels are formed from vinyl sheets. A sheet of vinyl is extruded with a V-shaped bend along one of its edges, and a Z-shaped bend intermediate its edges. The extruded sheet of vinyl is then formed, while in a hot, semi-viscous state into the final siding profile. As the siding profile is formed, the V-shaped bend is formed into a first locking profile and the Z-shaped bend is formed into a second locking profile. The first locking profile is dimensioned for a snap-type engagement with the second locking profile of another similarly formed siding member.

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Clark, NJ, United States of America

Thomas W Dawe