A very popular furniture topology is the one having leaves sliding laterally and capable of overlapping an adjacent shutter. The guiding mechanism of the shutter must be able to extract it from the furniture's frame and then, once it is projecting, to guide it over the nearest shutter. Often these mechanisms allow the multiple superimposition of leaves, i.e. more than a shutter can pack over another.

It is clear that the guiding mechanism is not trivial, and implies so much components that it can't help costing a lot. Many patents refer to this argument, but a definitive solution was far to come at hand.

In the figures on the side, there is shown instead Girotto's invention (as designed with Solidworks and then produced by a famous and enterprising company in the field of furniture (Perin s.p.a)).

The structure of the mechanism follows - as usual - Girotto's philosophy, i.e. "simple but effective".

The heart of the mechanism is a guiding groove obtained on the top and bottom of each shutter. Rollers or wheels fixed by spacer brackets on another shutter can slide in the groove (in the two bottom figures you can see the extracted shutter).

Therefore, every shutter can slip its support rollers into the groove of an adjacent shutter and grip thereon. It follows that an unlimited number of leaves can be superimposed.

The extraction mechanism - among other innovations - implements a synchronizing system between the two carriages, top and bottom, which supports the shutter. In particular, a bar with two toothed eyelets at its ends is used, in which two toothed pinions of the extraction mechanism engage. Oscillations and vibrations are thus avoided during the extraction, thereby providing a fluid and smooth motion.