Patent ID: 6915675

Claim:
A method of obtaining a partially corrugated sheet metal, comprising providing a roll of rolled up sheet metal having a first end; feeding said first end to a respective means of unrolling said first end off of said roll and transferring said unrolled first end as an infeed sheet metal; compressing said infeed sheet metal in such a way as to produce a series of transverse corrugations alternating with flat sections so as to form a partially corrugated sheet metal; transferring said partially corrugated sheet metal towards a press brake by sliding the partially corrugated sheet metal to the press brake; gripping partially corrugated sheet metal with grippers mounted on sliding carriages; positioning the partially corrugated sheet metal in such a way that the grippers are on opposite sides of a punch; folding the partially corrugated sheet metal by simultaneously moving the sliding carriages towards each other, moving the punch vertically downwards onto the partially corrugated sheet metal, and moving a counter-punch vertically onto the partially corrugate sheet metal, in such a way as to obtain a coil of partially corrugated sheet metal; extracting the partially corrugated sheet metal from the press brake; and shearing said corrugated sheet metal into pre-established lengths.