Coil form for electrical devices

Abstract From the Canadian patent

Disclosed is a coil form manufactured by an injection molding process in a single split mold. The coil form in its unfolded condition is produced in the mold defines two mold halves interconnected by flexible hinge bands. After folding the halves by turning the same about 180° along the hinge bands pin and hole connections secure the coil form in its final position. In a preferred embodiment, there are provided four form halves connected along one bending line by the flexible hinge bands and further connected by a transverse hinge band so that upon folding the mold parts along one bending line the coil, windings are applied simultaneously and thereafter the tubular mold parts are bent along …