Improvements to patent No. 475,547 for Improvements to the manufacture and fitting of folding doors

摘要

In order to be able to give them a surface finish using intaglio (gravure) techniques, the visible faces S of the profiles or door slats 1 and of the hinge parts 3 are substantially flat. To this end, the profiles or slats 1 have articulation portions 2 in the form of a hook with a straight section 2a and a hooked portion proper 2b, which is orthogonal, whilst the hinge parts 3 are formed by a polygonal core 3a, at two of the corners of which straight projections 3b extend and at the other two corners of which hook portions with a straight section 3c and a hooked section proper 3d, which is also orthogonal, extend. <IMAGE>