Elongated combined coffer-tunnel for roller blind of e.g. building window, has front and rear parts integrated at level of their sections of wall by aliasing system that assures locking of front and rear parts in plane transversal to wall

摘要

The coffer-tunnel (1) has front and rear parts (8, 9) integrated together at the level of their adjoining sections (3a, 3b) of a horizontal top wall (3), by a dove tail type aliasing system (14) that is arranged in a complementary manner, on the thickness of end edges of the sections with respect to the parts (8, 9). The part (8) is made of resistant moldable material i.e. casted reinforced cement concrete, and the part (9) is made of insulating moldable material i.e. polyurethane foam. The system assures locking of the front and rear parts in a plane transversal to the top wall. An independent claim is also included for a method for fabricating a coffer-tunnel.