How steel corrugated forming machine make roofing and siding panels

My house is older and needs a new roof and I am now looking at the benefits of corrugated steel roofing. I understand it last a lot longer then the old tar shingles. Steel roofing also has many new profiles that look very similar to other more traditional types of roofing materials. I like the look better the older roof shingles. When I was looking for how steel roofing is made I came across a website that has many different machines to make corrugated roofing.   Roll forming machines are used to make the best quality roofing and siding panels. The roll former uses sheet metal in a coil that is held in a uncoiler sometimes called a decoiler and feeds the flattener at the front of the rollformer machine. The flattener helps the roll former bend and form the steel in to the special profiles for the roofing industry. This website (www.samco-machienry.com) has many other machines used in the building and construction industries. I was especially impressed with the high level of quality and attention to detail. They are a very professional roll forming company.