The hoisting mechanism
The hoisting mechanism for the blinds consists of a smooth longitudinal steel shaft supported by bearings incorporated into the extruded aluminium housing that constitutes the upper spacer bar. The lifting cords are wound in a single layer on the shaft insuring that the slats are always hoisted or lowered in parallel. The slats are tilted by means of the turn-couplings on the steel shaft. This enables a combination of the hoisting, lowering and tilting function, so that only one operating cord achieves these functions via the external pulley.

The dry air or gas in the hollow space gives efficient protection against corrosion.