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The can tear-off end made of aluminum introduced in 1964 was a significant development which considerably increased consumer convenience.

The ring was used to tear-off the tab and open the can.

A later patent upgraded the stay-on tab and the ring is now part of a mechanism that pushes the tab inside the can keeping it part of the can as you drink.

This patent was mainly addressing environmental issues and health risks that were common with the older version of the tear-off tab.

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17y ago

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