How to open a jar with a can opener: instructions and description of knives

Probably, there is not a single adult in the world who has not tried to open cans with conservation. That just do not come up with some unfortunate craftsmen to make life easier for themselves. Many open the lids with an ordinary table knife, someone uses a fork or even a screwdriver for these purposes. Meanwhile, all these torments are useless, because humanity long ago invented a brilliant tool - a can opener. Opening cans is not only convenient for them, but also safe.

There are four types of can openers: manual, mechanical, automatic and electrical. The difference between them is colossal, and therefore it is more correct to tell separately about the rules for using each of them.

Manual "opener"

This instrument was found in the kitchens of our grandmothers. Even then, it was called "opener". The manual can opener is a simple design with a metal blade and a wooden handle. At the same time, with the help of the metal part, you can open not only cans, but also home-made glass seams by picking up the metal lid with a special "hook".

It is not safe to use a hand held device. It is important that it is sharp, the metal part does not "walk" and is securely fixed on the handle. In addition, when opening, you need to make an effort, therefore, an adult can cope with this task, but it is not recommended to entrust this process to a child.

The jar must be firmly held with one hand. With the other hand, you must first pierce the tin surface (with the cutting end), and then open the jar with translational movements in a circle. In this case, a metal ring near the cutting part serves as a fulcrum - they should rest on the edge of the can.

Mechanical can opener

Most often it is a completely metal device with a handle for rotating the cutting wheels and handles. It takes much less effort to open a jar with such a tool. At first glance, a mechanical knife seems like a rather complicated tool, which is not entirely clear how to use. However, everything is not as difficult as it seems.

You need to hold the device parallel to the jar, that is, its disk should be located exactly under the solder of the lid. You can fix the disc using a special wedge. After that, you need to carefully rotate the handle and move around the can. If everything is done correctly, the cut will turn out to be neat.

Important! In stores you can see devices with plastic handles. However, they are unsafe and break down quickly. It is better to buy all-metal can openers, which are considered more reliable.

Automatic can opener

A safe device, the cutting part of which is hidden in a plastic case. It is installed near the lid and the jar is opened using a special switch. The knife has an interesting feature - a special magnetic coating, thanks to which it is securely fixed on a metal surface.

This tool is easy to use, anyone can open canned food with it. However, the cost is confusing - an automatic device is significantly more expensive than a manual or mechanical one.

Electric can opener

Inside such a device, there is a small, but a real motor. Thanks to him, you can open canned food quickly. There are a lot of electric models today. A design in the form of a cutting wheel and a holder is considered a classic option. Modern devices are "packed" in stylish plastic, which makes them even more convenient to use.

By the way! Electric knives are portable and tabletop. There are multifunctional tools that open different banks.

For work, the knife is plugged into an outlet (if it does not work on batteries), then it is fixed on the jar using a special holder. The motor is powered by a switch. When the can is open, the latch is removed from the lid. The whole procedure takes no more than 30 seconds.

So, it is not difficult to open canned food in a metal container. Any can opener will do the job perfectly. Of course, if it is serviceable and sharp enough. Which tool to choose is up to everyone. It is important to consider not only the design of the device, but also the materials from which it is made.