DETAILED DESCRIPTION OF THE INVENTION A blind assembly 5 in accordance with the invention is generally shown in FIG.
4.
The blind assembly 5 has two wing sections.
For illustrative purposes, only one of the wing sections is discussed in greater detail below.
FIG.
5 illustrates an alternative embodiment of the blind assembly, which is discussed in greater detail below.
The frame system is comprised of a shaped profile, said shape being necessary to enable the use of the fittings, such as hinges, pressure elements, square elements, "bifort supports", seat protections, and deformations.
FIG.
6 shows a corner of the profile, with the square element inserted in position.
Profile of the frame 10 of FIG.
6, is cut at 45°, coupled with the particular double tie rod system.
In this system, a square element 12 is inserted within the upper transverse portion, into the two ends already cut at 45°.
The square element 12 has two round holes 14, that will receive tie rods 16 and a square hole 18 corresponding to a square hole 20 on the frame 10, allowing its integral coupling.
Employing a bolt (not shown), having an oval head and a square base, in FIG.
6, the position can be seen that will receive two tie rods 16; said tie rods 16 will be restrained by the bolt head within rectangular seats 22, to be secured there by a shaped base 24.
The base 24 is tightened by a bolt sliding within the square seat of the frames 10 and of the round hole base.
The square element 12 represents a reinforcing element of the corner.
As shown in FIG.
7, it is inserted between the bent sheet parts in such a way to form a perfect restraint plane.
Abutment 26 creates a forced point in the profile bend, thus eliminating mechanical clearances.
In the frame profile, as seen in FIG.
8, seats are provided to function in four ways.
The functions include: 1.
receiving a hinge 28 of a bearing fixed part; 2.
allowing a fixed joint of a support 30, named "bifort"; 3.
providing a box 32 in the coupling, as if the shaped frame 10, that is an opened profile, is twisted in such a way to become box-type, thus stiff; 4
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Screen Walls 
