METHOD AND APPARATUS FOR FORMING TAPERED SHEETS, AND TAPERED SHEET FORMED THEREWITH

摘要

The invention relates to 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 alpha with a side of the metal strip and by shearing the metal strip in between these two places under an angle of 2 alpha with the side of the metal strip, the shearing being performed in any order, to form a substantially symmetrical tapered sheet. The invention also relates to 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 alpha and second shearing means so as to be able to make a substantially longitudinal cut under an angle 2 alpha in the metal strip.