A smooth-edge can opener is designed to cut along the lid's seam without leaving sharp edges or metal shavings. These can openers have a safer design that minimizes the risk of metal shavings contaminating food.
I believe what you are referring to is known as a side can opener or a smooth edge can opener. You can find them and purchase them on the internet. They were designed to eliminate sharp edges to reduce the possibility of cuts. Food should not be stored in opened cans. Do not use the lid to cover the can for storage.
No, a Hickory leaf edge is typically serrated or toothed, not smooth.
Willow leaves are smooth-edged.
A nickel has a smooth edge. No ridges.
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To open a Jarritos bottle, you typically need a bottle opener, as they come with a metal cap. Place the opener under the edge of the cap and apply upward pressure to pop it off. If you don't have a bottle opener, you can use the edge of a countertop or a sturdy object like a spoon to leverage the cap off. Just be careful not to break the bottle or injure yourself!
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A can opener opens "tin cans" (though they do not contain much tin now in the manufacturing process).A metal can opener first punctures the lid of the can, then is manually clamped down onto the lip of the can. The lip is the raised edge around the lid. The manual opener then works from a human turning a wheel on the opener. This action begins to "cut" the metal on the inside of the lip / outsider edge of the lid. The opener contains a magnet that attaches to the lid, so when it is completely cut, the lid can be lifted off. The edges of the lid may be ragged; it can cut skin. The lid is thrown away; the food is removed and the can is thrown away.An electric can opener operates on the same principles: using a lever, clamp, magnet, wheel, and a turning action. The main difference is less work for a human.Some men or military personnel use a knife with a second edge on it. This uses manual force to puncture the lid and to go around the lid. The edge is very jagged. A knife carries more risks.
polyhedran