Connecting box for air outlet comprises five individual parts, i.e. four cover plates with sliding rabbets and connections, provided with edge-around plate ends and top plate with edged-around plate ends for securing cover plates

摘要

The connecting box for an air outlet comprises five individual parts, i.e. four cover plates (A) with sliding rabbets and connections (7), provided with edged-around plate ends and a top plate (B) with edged-around plate ends for securing the cover plates. All the side cover plates are provided with one or more connections and are joined to each other by special rabbets. The top plate grips with its all-sided edging over the cover plates to secure them and form them at right-angles.