About Easy Open End :
A brief history of Electrolytic Tinplate Packaging（-）
Tinplate is one of the oldest packaging materials and was originally used for round, square and rectangular boxes and canisters. In the early 1800 s, following the offer of a prize by Napoleon Bonaparte for the first person to develop a way of preserving foods, the first heat processed tinplate food cans in the world were made, filled, processed and sold to the public in Bermondsey, east London. This had a great impact on society and the technology soon spread to the United States where it was developed into a continuous production process.
In the early 1900s there was a major step forward when a method of mechanically attaching the ends to the food can replaced the inefficient soldering system. This improved both the speed of operation and food safety aspects. The first aerosol can was patented by Erik Rotheim (Norway) in 1929. Following this, in 1933/36 three-piece soldered side seam beer cans became available in the United States following the repeal of the Prohibition Laws and the development of suitable internal coating materials.
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3. Canning lids for food grade material