paper bag making machine

paper bag making machine - Wenzhou hongying Machinery Technology Co., Ltd. specializes in the production of paper pipette machine, high-speed environmental protection paper pipette machine manufacturers, the product is a set of "scientific research, production, sales, service" as one.

Who invented the straw?

The straw was invented by Marvin Stone in 1888. In the 19th century, Americans liked to drink cold light wine. In order to avoid the heat in their mouths and reduce the freezing power of the wine, they drank it directly without mouth. They drank it with hollow natural straw, but the natural straw was easy to break and its own flavor would permeate into the wine. At that time, Marvin Stone, a cigarette manufacturer in the United States, drew inspiration from cigarettes and made a paper straw. Under the test drink, it will neither break nor smell. Since then, people not only use straws when drinking light wine, but also like to use paper straws when drinking other cold drinks. After the invention of plastics, because the flexibility and aesthetics of plastics are better than paper pipettes, paper pipettes have been replaced by colorful plastic pipettes. The inventor did not apply for a patent.

Pipette is based on the principle of atmospheric pressure:

When the air is sucked away from the suction pipe, the pressure in the pipe will decrease, and in order to balance the pressure, the pressure in the pipe will force the liquid to rise. When the inhalation stops, the liquid in the tube drops and the pressure returns to equilibrium. This is the wonderful principle and application of pipettes.

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