Safety can express uses a steel roller driven by powerful gears. To break that seal open without cutting into the lid leaving edges that are incredibly smooth.

Product information

Safety Can Express uses a steel roller driven by powerful gears to break the seal without cutting into the lid, so you are left with smooth edges. Safety Can Express works on any size can, pop-top cans, and dented cans.

Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States. These early openers were basically variations of a knife, though the 1855 design continues to be produced.

noun. a manual device or small electric appliance for opening cans.

So just keep turning the lever. Just keep on turning it and as you can see it will continue to open the can. And i'm close to the end.

A can opener (North American and Australian English) or tin opener (British English) is a mechanical device used to open metal tin cans.

Ezra WarnerWilliam Lyman Can opener/Inventors

So the opener stays clean and your food safe sanitary. Then. I use attach lid pliers to remove the lid.

The Bottom Line After researching the best manual can openers, we chose the OXO Good Grips Smooth Edge Can Opener to be the best overall for its effectiveness, comfortable design, and accessible price point. We also love that the blade is designed to reduce contact with food for easier cleaning.

The basic use of a can opener is to remove the lid from a metal can in a way that prevents injury and does not allow metal shavings to contaminate the can's contents. The original can openers had a sharp cutter, like the military opener designed during World War II.

Common parts include the cutting wheel, which punctures the can lid, the gear mechanism that turns the wheel, and the handle for manual operation. Electric openers feature additional parts like motors and switches. The assembly may also include a magnet to lift the lid, ensuring safe disposal.