Method and apparatus for forming tapered sheets, and tapered sheet formed therewith

摘要

A method for forming a tapered sheet for building purposes, in which the tapered sheet is formed from a metal strip. The method is characterised in that the tapered sheet is formed by shearing the metal strip in two places under an angle of á with a side of the metal strip and by shearing the metal strip in between these two places under an angle of 2á with the side of the metal strip, the shearing being performed in any order, to form a substantially symmetrical tapered sheet. Also disclosed is an apparatus for forming a tapered sheet for building purposes, to form the tapered sheet from a metal strip. The apparatus is characterised in that it comprises first shearing means so as to be able to make a cross cut under an angle á and second shearing means so as to be able to make a substantially longitudinal cut under an angle 2á in the metal strip.