Sheet metal monoblock applies to doors and the like. (Machine-translation by Google Translate, not legally binding)

摘要

Sheet metal monoblock applicable to doors and the like, wherein a plates smooth desired thickness, cut to a larger of the final measure and estajes cut in their corners, appears folded rolled or printing of its central zone, bent themselves on its margins, in forming hollow square tubes all or some of its sides, may welded terminals such margins and soldiers to be on the plate. (Machine-translation by Google Translate, not legally binding)