Improved arrangement in the unión of profiles of frames, characterized in that comprises in each corner of the frame pins or latching studs and an attachment plate bent angularly in square, of which the pins are inserted by their sides on the inside of the ends of the joining of the profiles of the frame facilitating the assembly of the same, carrying on the sides a plurality of notches by means of which the profiles are grasped, while the square flange is laterally fitted on its sides between respective continuous and lateral grooves of the edges. Profiles, which are widened at some points by a cylindrical cavities where they fit corresponding cylindrical thicknesses of the sides of the plate in square, to be thus hooked to the profiles of the frame against possible sliding in the joint. (Machine-translation by Google Translate, not legally binding)
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