(57) The present invention relates to a squarer for frames, comprised of a square (1)
or triangle, made of metal plate and presenting corresponding extensions from the
external rim of the cathetus, oriented in the same direction. Said extensions being
formed by folding the corresponding side edge at right angles to the plane of the
square or triangle, and being provided with passing holes (4) for screws (10) fixing
on the frame. The sides of the square (1) or triangle are similarly extended from
the internal and external edges at right angles by lappets (2,3,5,6) oriented respectively
in opposite directions; and pressed-on for forming longitudinal flutes (7), acting
as stiffening and reinforcing members. The vertex (11) of the right angle of the square
(1) or triangle is externally cut or beveled at 45°.
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