“Harmonica” type of mechanism for windows and doors

Fitting systems for windows and doors with folding wings “harmonica” type. This fitting system is with a specific and unusual mechanism that allows having large passage area when opened and exceptionally light and quiet wings movement. Within this type of fitting system the rails for the mobile parts can be installed down or on top of the sash, depending on the particular needs. The “harmonica” type of mechanism can be produced either from aluminium or PVC frames.

These mechanisms are preferable choice for covering and accomplishment of large openings, for example – exhibitions, restaurants, entertainment zones, terraces and others, whereas the requirement for maximum passage exists. The “Harmonica” type portal system wings’ fold either to only one or to both sash sides, done by a special frame or through wheels (particular and special elements for the “Harmonica” type fitting systems) and they provide almost 100 % opened, accessible, available and free area.