Abstract: A trapezoidal door and frame assembly and method of manufacture in which the assembly is constructed of a top horizontal frame member having the ends thereof arcuately shaped to conform with the radius of the upper corners of the cap. The ends are formed without deforming the flanges extending from the outer face of the frame member by removing, in a novel and unique method, portions of the flanges which permits cutting the ends of the frame member along a radius which matches the upper corners of the cap. This top door frame construction permits mounting the frame member closer to the top of the cap, thus providing a larger access opening and door in the rear of the cap.

Abstract: A slideable closure construction comprises a frame having a track with a pair of closures slideably mounted therein. The closures include interior end edges which abut in a closed position, and are spaced apart in an open position. A male latch member extends continuously along the length of the end edge of one closure, and a female latch member extends continuously along the end edge of the other closure. The male and female latch members form a snap lock which securely interconnects the two closures in the closed position, and simultaneously forms a weatherproof seal therebetween.

Abstract: An improved truck cover having a door with a door prop wherein the bracket member by which the support or prop element is mounted to the door is provided with a flange member attachable to the face and edge portions of the door.