Seaming metal cans
Introduction
In 1802 Nicolas Appert established the first cannery in the world. He made canned meat, fish, fruits and vegetables. He had used them as containers or glass jars.
In 1810 we invented the tin in tinplate for food preservation. These boxes had a cylindrical shape and made of three pieces of tin soldered by hand: a cylindrical body, a ring on top and a base (Figure 1). The filling takes place through an opening in the center of the ring. Then a small disk punctured a tiny hole was welded over the opening. After removal of the air box with a glow, the box was sealed permanently by soldering the hole with tin. Then it was then tagged by Tinned a paper label. In 1822, the paper label has been replaced by a thin copper foil stamped on behalf of canned food.
In 1894, we began marketing the sardine can-opening to take off for the first time (Figure 2). The arrival of the newborn caused the gradual disappearance of the box to shrink in 1810.
In 1966, the first easy-open system has emerged. It will be followed by other systems to facilitate the use of boxes. The progress of recent years have focused around the easy opening cans and materials such as aluminum and steel, to make both thin and light resistant.
In this paper we review the different types of cans that exist today, the technology of their manufacture and the various defects seam and how to highlight.