How to make a can opener. The simplest can opener with rolled-up tin lids

Each of us has to discover different canned food, screwed with a metal lid in a glass jar. Not always, attempts are crowned with results, since the lid is additionally held in place by the vacuum formed inside.

At the time of preservation, the products are loaded hot and after closing, they cool down, creating, although not a complete, vacuum. Therefore, you have to pry off the lid with the tip of a knife and let air inside the can. In this case, the lid is damaged and its reuse is problematic.

It is much more reliable to use a special key for such purposes, which consists of a belt and a wooden handle. Making such a key is quite simple, just find an unnecessary belt and a wooden block 120 x 40 x 20 mm and two screws 4 x 35 mm.

At the end of the wooden block, you need to make a cutout to fit the circumference of the can using a jigsaw. Then wrap the strap around the lid of the jar and leave another 45 mm of strap around the edges, cut off the rest of the strap.

After this, fold the two edges of the belt and screw it to a wooden block with two screws from the side of the cutout. The can opener is ready. The belt fits tightly to the edge of the lid, and when turned to the side, counterclockwise, the lid is clamped and with further application of force it unscrews.

And also summer residents making homemade canned goods!

The history of its creation, one might say, is completely accidental. It so happened that I recently went to visit one of my friends, who at that time was doing some minor repairs in his barn. We sat and talked, and since it was quite hot outside, we got thirsty. And then my friend suggested getting it from the cellar, which was located in this barn, three liter jar compote.

When he took it out, it turned out that this bank closed with a tin lid using Seamer. And since we didn’t have an opener at hand, an inventive idea immediately began to work on how to quickly make a homemade opener.

However, since in addition to the opener, the compote needed to be drunk from something, my friend still went home for the opener, and at the same time for the mugs.

Nevertheless, my inventive thought inevitably continued to work, and just then my gaze fell on a screwdriver standing on the floor in the corner of the barn. By the way, there was also a bunch of self-tapping screws with a press washer, as well as several scraps of wooden blocks and planks.
As a result, when my friend came, I had already made a very simple homemade opener, which we immediately tested by opening a jar with it. And I must say that this opener did its job perfectly.

Well, now I’ll show you how such an opener is made.

To make it we need just nothing:

Materials and fasteners:

• A piece of wooden block or plank 15-20 cm long.
• Self-tapping screw with press washer 4x40 mm, or longer.

Tools:

• A drill or cordless screwdriver with a PH2 bit, or even a simple screwdriver.

The procedure for making an opener

To make an opener, we need to perform only one operation.

Using a screwdriver or even a simple Phillips screwdriver PH2, we screw the self-tapping screw with a press washer into the side of the board at a certain angle, stepping back from its end by 20-25 mm.

And that's basically it! Our opener is ready!

Of course, my opener handle turned out to be a little long and, in principle, it can be slightly shortened by sawing off 5-6 cm. In addition, for greater ease of use, you can further process the wooden handle of our opener, for example, by chamfering it or sanding it with sandpaper.

However, if this opener is needed to open only one or two cans, then you can do it this way.

Opener tests

Now let's test our opener in action. Let's try to open it with a three-liter jar of last year's compote, which I took out from the underground.

To do this, take this opener in your hand, just like a regular one, and, picking up the edge of the lid with the edge of the screw head, pull it up and slightly lift the section of the lid.

Then we move the opener a certain distance around the perimeter of the lid and again hook the lid in a different place, lifting its edge.

Thus, we make six or seven such hooks and, as a result, the lid opens completely.



At the same time, the homemade opener coped with its task perfectly.
The only thing that seemed to me is that the projection of the screw needs to be slightly reduced. Therefore, using a screwdriver, I turned the screw a little (1.5-2 mm) deeper into the board.

And after that, I tried to open another jar, this time with pickles.

And this time the opener did its job perfectly.



In general, we can summarize that this homemade opener is very functional and convenient. By the way, in addition to cans, apparently, it can also open bottles with tin caps, for example, beer bottles. However I haven't tried it.
Well, in conclusion, I repeat that, if necessary, you can additionally process the handle of such an opener, for example, round off the sharp edges with a knife or plane, and also sand it with sandpaper.
You can also drill a hole at the end of the handle so this opener can be hung on the wall. This will be needed if someone wants to constantly use such an opener.
Well, that's all for me! Bye everyone and happy homemade crafts for your home and everyday life!

I want to eat always and everywhere. True, attempts to fill the stomach sometimes bring suffering no less than the most tender feeling. Especially when the food languishes imprisoned in a tin can and there is no opener at hand. Stay hungry or fight the system? We choose the second. Moreover, there is at least four effective ways how to open a tin can without an opener.

These life hacks will come in very handy both on a hike and at home. And knowing how to open canned food or sweet condensed milk using improvised means is truly priceless. Don't have a bottle opener? Try opening the can...

1. With a knife

Place the blade strictly vertically near the very edge of the lid.

Hold the handle with one palm, and with the other, begin to gently pat the first, as if “driving” a knife into the base of the can. Just don't use too much force, as you risk the blade slipping. Repeat until you punch a hole.

Make a few more holes in diameter.

Now it’s enough to pry the blade off, slightly cutting the tin, and open the can.

2. Spoon

A method for the most stubborn and the most desperate. Or for those who are terrified of knives. You will need a metal spoon and considerable physical effort.
Place the spoon vertically (position as in the knife method) near the edge of the lid and begin to rub. Back and forth until the tin wears thin. A little effort and you will make a hole in the lid.

Now use a spoon like a knife and cut open the perimeter of the jar.

3. Chef's knife

Probably the easiest way. Simply pierce the tin lid with the “wing” of the knife (the angle between the blade and the handle).

4. Stone or asphalt

A real survival hack in case of a long hike or a zombie apocalypse. Take a large stone or go to the asphalt. Turn the jar over and begin to actively rub its lid (specifically, its edge, as always) on a hard surface.

Rub until you see a small amount of liquid on the stone. This will be a signal that your efforts have resulted in a hole in the tin. The main thing is to turn the jar back in time before all your dinner ends up on the tool.

Bon appetit!

And a true master of survival in extreme party conditions simply needs to know...

It was called Kuhn Rikon Auto Safety Lid Lifter Can Opener, and it looked very unusual - at first glance, there were no knives that could cut the lid of the can. And indeed, open jars, and the lids looked without the slightest sharp edge (for comparison, on the left the can was opened with a regular opener from IKEA, and on the right - Kuhn Rikon):

As they say - at least now under the ashtray! Moreover, this opener also left the lid without sharp edges, and with a special side, allowing you to subsequently close the jar so that it did not look like this:

Do you remember what jars of lemon slices in sugar look like from our distant childhood?

And only one problem gnawed at me: this opener cost 1,100 rubles, and this does not include the cost of shipping! You could, of course, look for a similar Tefal comfort opener:

But it also cost about 1,300 rubles, and in fact it was missing everywhere!

Of course, it simply couldn’t happen without our Chinese friends copying something similar. And with this thought, I went to AliExpress again.

And indeed, as it turned out, with a similar mechanism, the Chinese offer a completely wide range of openers for every taste and budget - from 190 to 900 rubles! I decided to go with the cheapest one I found:

selecting the opener red. It cost me only 194 rubles (three dollars and 20 cents), and the delivery is free:

The track was untraceable, but after a month and a half, I finally received a notification that my parcel was at my post office. It turned out that this is a fairly wide package:

Why this is so - I don’t know, but what difference does it make? Let's reveal. Inside, wrapped in a polypropylene wrapper, lies our bottle opener:

and even tied to some type of instruction:

Let's get it. Here she is, a beauty, from her face:

And from the inside out:

Although the devil can actually tell where her face is and where her back is. The casting is neat, the seams are good, there is practically no flash. In terms of size, the seller promises us this:

Well, yes, clearly. If you turn the handle, then, of course, the length will shorten even more:

Sorry, I won’t measure the weight this time.

Before proceeding directly to the tests, I’ll tell you a little about its mechanism. So, the essence of this opener is that it does not cut the lid from above, but lid rim on the side, then rolling it. Let's take a closer look at the mechanism in the photo:

The point is that the cutting knife (roller on the right) approaches the can from the side, so that the large roller hits the lid from above, and the cutting knife hits the rim of the lid from the side. It looks like this:

After the opener is installed on the can, you need to turn the handle a little, about a quarter of a turn. The cutting roller does not rotate yet, but the roller installed on the lid pulls the side of the can towards the cutting knife that remains outside. Those. the rotating roller moves on the axis of the opener towards and away from it. The easiest way to show this is on video:

And only with further twisting of the handle does the roller begin to rotate in the already drawn state. This is what a rotating roller looks like in real life:

And a cutting roller with a roller:

The metal arc, as I understand it, holds the entire structure together; there is no need to rest it on the can.

The seam on the can looks like this:

The cutting roller, pulled from the side to the rim, begins to simultaneously cut it from the side and immediately roll it. By the way, do you know that not only for canned food, but also for the cans themselves there are corresponding GOSTs (one and two, three), regulating everything from the size of the cans to the radius of the sealing seams?

Well, now let's get to the tests. To do this, we will use a standard 76-mm caliber can (putting aside the insinuations about turning factories for the production of canned food into corresponding factories for the production of shells), with hard porridge, and also usually used for stewed meats, etc. (it turned out to be slightly smaller in diameter, but in GOST fits):

and a jar of canned fish with a diameter of 103 mm (the actual diameter also turned out to be smaller):

It is good because a) the can is small in height and b) the canned food is in liquid form, and we can see if it will spill when opening the can (by the way, these canned food turned out to be outright disgusting - solid skin and bones).

We are starting to open. First - a stew jar - put a knife on top, a quarter turn of the rotating handle to pull the cutter to the jar, and then rotate:

Unfortunately, the moment of the quarter turn that attracts the knife to the can was not included in the video, and, as you understand, only one take was possible :) And at the end, when the can was already open, I didn’t understand this moment at first and continued to turn pen can opener, so the jar stood still, but the lid was already spinning. Okay, let's see what we got in the end. Here, in fact, is the resulting seam and cut itself:

Let's lift the lid a little to get a better view:

Now let's start opening it :)

We look at the edge of the jar:

Very good, the seam is absolutely blunt, even if you want to, you won’t be cut off! And on the lid:

No worse. We eat half, take a photo from above:

In general, everything is great, you can close it with the same lid again. In general, as in the video that I posted above, when I just opened it. Then it will look again like in the first photo:

Of course, the closure is not airtight, not like a plastic lid on a glass jar. But in any case, it is several times better than a lid opened with a regular can opener.

Now let's start opening the silver carp in tomato sauce. Since the height of the can is much smaller, plus the presence of liquid inside, the process is not even twice as complicated. Well, if you consider that I also stood awkwardly so as not to block the camera with my hands... But even despite all these difficulties, the can opener coped with the task perfectly! By the way, here - I didn’t forget to film the initial movement, when with a quarter turn of the handle, the can opener is attracted to the can, but the can does not rotate yet, and begins to rotate after this quarter turn. Yes, and also - since after finishing the cut - the cutting roller is still pulled towards the can, you need to turn the handle in the opposite direction the same quarter turn. In general, watch the video:

During opening, the liquid did not spill, and even such a small height of the can was enough for the rotating handle to rotate more or less normally, only hitting the table a couple of times. Well, let's see what we got. Unfortunately, since everything was quickly eaten, here are photos of the now empty jar:

Only in one place - apparently where my hand slipped off - did I get a small burr on the lid:

Here it is enlarged:

But otherwise, along almost the entire circumference, the cut and seam are very good:

Here it is in macro form:

What else can I say? Probably just a short summary.

Pros:

Relatively fast delivery
+ Free shipping
+ Excellent design, ergonomics
+ Good quality both materials and manufacturing
+ Possibility to choose colors
+ Provides a safe, blunt cut on both can and lid
+ Exceptionally easy movement, even fragile women can handle it
+ You can then use the lid to close the jar relatively tightly
+ It is not the can or lid itself that is cut, but the sealing seam, which is then rolled
+ Even if you open a jar of liquid, nothing spills
+ Cans can be used later for anything without fear of cutting yourself
+ Price

Cons:

Once there was a small burr on the lid
- Placement of the can opener on the can takes some getting used to - it is still a little different from the standard one.

Resume.

This can opener leaves just a WOW effect. Why am I an unimpressed comrade, but in in this case I was absolutely delighted. Never before have I seen someone be able to invent a bicycle that is so superior in its characteristics to its ancestor! Everything is impressive: convenience; the way it works; the result that is obtained. And the seller didn’t disappoint: his delivery is fast and free, and he didn’t mess up the color. In general, this is a must-have product, and I can confidently recommend this opener for purchase - it will come in handy both for yourself and for gifts for relatives on March 8th.

Canned food has become a part of our lives. And now it’s hard to imagine your existence without this. Neat tin jars are very easy to use. They allow you to store the desired product for a long time without requiring special conditions. Many special devices have been invented to open such containers. But sometimes situations arise when these necessary items are simply not at hand. What to do in this case? How to open a tin can without an opener? It turns out that there are several interesting ways to do this. As an example, we can consider some of them.

With a knife

People do not always use some items for their intended purpose. Their ingenuity allows them to difficult situation use the simplest things for the right purposes. For example, there is can stew, but there is no way to open it. What to do in this case? How to open a tin can without an opener? This is where an ordinary kitchen or

You just need to follow a few simple steps:

1. First, the jar itself needs to be placed on your knees or held tightly between your legs. Otherwise, it may jump to the side, and the person risks getting hurt.
2. After this, the tip of the knife must be placed at the very edge of the jar, positioning it vertically to the surface.
3. Holding the handle with one hand, you need to strike it with a strong blow from above with the other. In this case, part of the tip will be inside the container.
4. Then, using forward movements, you should carefully cut the lid, moving the knife strictly along the diameter of the circle.
5. Pry the cut edge with the tip and lift it up.

This is one of the most popular options for how to open a can without an opener. Most men use it. As you know, many of them constantly carry a knife with them. And having a certain physical strength, it will not be difficult for any of them to perform simple actions.

bare hands

Sometimes, by the will of fate, people find themselves in situations where they have nothing in their hands that could help solve such a problem. In this case, they have to rely only on themselves, deciding how to open a tin can without an opener. There is a method that only a strong and physically developed person can use. To do this, he will only need his own hands. The whole process consists of three stages:

• Holding the jar between your palms in a horizontal position, use the fingers of both hands to make a dent on the side surface exactly in the middle. After this, press the edges again so that the container bends even more in this place.
• Repeat the same steps on the opposite side.
• Firmly grasping both bottoms with your hands, make counter forward movements. As a result, the deflection points will crack and the can can be divided into two equal parts.

True, this method is applicable only if there is not a large amount of liquid inside the container. Although even this circumstance will not stop a hungry person.

Subtleties of design

But the use of force is not the only way out of such a situation. Yes, and the knife may not be at hand. How then to extract its contents from a tin container? Don't throw it away in this case. Sometimes the clue lies in the technical side of the issue. Understanding the technology of sealing food in tin containers, you can figure out how to open a tin can without an opener and a knife.

As is known, on industrial enterprises The process of rolling a tin container involves bending the edges of the lid around the cylindrical base of the container using a press. To remove it, you need to remove the protruding layer of metal. This is very easy to do:

1. You need to take the jar in your hand so that its bottom lies in your palm.
2. Turn it upside down.
3. Pressing the jar onto a hard, rough surface (concrete, stone), make circular movements. Literally in 2-3 minutes the “side” will be erased. After this, you just need to lightly press the container from the sides, and the lid itself will bounce to the side.

This method can be useful for those who find themselves far from civilization and do not take care of everything they need in time.

Non-standard use of cutlery

People always try to stock up on all sorts of clever gadgets to make their lives easier. But sometimes the situation gets out of control, and it becomes necessary to look for a non-standard way out of the situation. For example, you need to decide how to open a tin can without an opener at home. To do this, you can use the simplest tablespoon.

The whole process will, of course, take some time. But this problem is fading into the background. To open a regular tin can necessary:

• Hold the container tightly with one hand. It can be placed on a table or held on your lap.
• Take a spoon in your other hand and rub it with its edge along the lid in the place where it comes into close contact with the “side”. Tin is a relatively soft material, so after just a few minutes a gap will form in that very place. It is advisable to do this around the entire perimeter.
• After this, you can use strong pressure to expand the resulting hole as much as possible. And then, using the spoon as a lever, lift and remove the lid.

It is better to do this work with cutlery made from more durable material. Therefore, an aluminum spoon will not work for this.