> tear-strips on consumer packaging are an example of this
The ring pull on a can might be a better example. Tear-strips are notoriously unpredictable.
The ring pull on a can might be a better example. Tear-strips are notoriously unpredictable.
The whole thing is pretty ingenious, but the way the internal pressure helps vent the can while the tab is acting as a second class lever, then as soon as it’s vented becomes a first class lever to push the scored section of the top into the can — that’s great engineering.