Sign Box with Closure
Patent: 3,863,372
Issued: Feb. 4, 1975
Inventor: Johann Stilling, Islington, Ontario, Canada
A sign box for construction of an illuminated sign has a top, bottom and sides, all of which are formed out of extruded metallic material. It also has a removable front panel formed from extruded metal. The box and the front panel have complimentary mating formations that extend around all four sides of the box and panel, which engage the panel to the box. Releasable securing means are provided for securing the front panel to the box.