Adjustable split door jamb

Claim 1

The process of manufacturing an adjustable split door frame member, the process comprising the steps of: a. cladding the front surface of a board with a flexible cladding material; b. longitudinally grooving four parallel V-shaped grooves in the back of said board down to but not through said clad, each groove defining two adjacent surfaces respectively; c. grooving down to but not through said clad a first and a second plowed groove in the back of said board parallel to and between the middle two V-shaped grooves, said first plowed groove defining first and second facing surfaces and said second plowed groove defining third and fourth facing surfaces, and said first and second plowed grooves forming a middle portion therebetween; d. joining said board along said V-shaped grooves by folding said respective adjacent surfaces toward each other into abutting relationship and securing said board in said relationship, thereby forming first and second folded ends of said board adjacent to and outside of said first and second plowed grooves respectively; e. joining said first and second facing surfaces together in abutting relationship along a portion thereof by moving said second surface toward said first surface, offsetting said second surface by an amount equal to the width of said first plowed groove, and securing said surfaces in said offset abutting relationship; f. rotating said third surface away from said fourth surface by an angle of substantially 90°; g. attaching a support member between said third and fourth surfaces, thereby securing said third and fourth surfaces in substantially perpendicular positions; h. attaching a board member to said middle portion, said board member extending beyond said middle portion to form a slot with said second folded end.