Beer contains a lot of carbon dioxide, so there are two basic requirements for bottle caps. One is good sealing, the other is a certain degree of bite, that is, the bottle cap is usually firm.
This means that the number of folds of each bottle cap is in direct proportion to the contact area of the bottle mouth, so as to ensure that the contact area of each fold can be larger. The wavy seal outside the bottle cap can not only increase friction, but also facilitate opening. 265,438+0 teeth are the best choice to meet these two requirements.
Extended data:
The initial sawtooth number of beer bottle cap is not 2 1. There are 23 or 24 serrations on the lid of beer bottle, and we applied for a patent.
As early as the end of 19, William Pate invented the 24-tooth bottle cap and applied for a patent. There is also a paper pad inside to prevent the beverage from contacting with metal, which is mainly based on Pater's finding that the number of teeth is the most suitable for sealing the wine bottle. As an industry standard, 24-tooth bottle caps were used until 1930s.
With the process of industrialization, the original manual capping method has become industrial capping. The 24-tooth cap is first covered on the bottle one by one with a punch. After the automaton appears, put the bottle cap into the hose and install it automatically. However, in the process of use, it is found that the 24-tooth bottle cap is easy to block the hose of the automatic filling machine, and this will not happen if it is changed to 23 teeth. Finally, it was gradually standardized to 2 1 tooth today.
Phoenix Net-Why is there a 2 1 sawtooth on the lid of each beer bottle? Is it because?