Darchelle Meunier Coffee Maker January 22, 2019 08:55:22
A vacuum maker brews coffee using two chambers where vapor pressure and vacuum produce brew which is clean rich and smooth compared to other brewing methods. This type of maker is also known as vac pot siphon or syphon coffee maker and was invented by Loeff of Berlin in the 1830s. These types of makers have been used for more than a century in many parts of the world. The chamber material can be pyrex metal or plastic and the filter can either be a glass rod or a screen from cloth paper or nylon. The Napier Vacuum Machine presented in 1840 was an early example of this technique. While vacuum makers are generally to complex for everyday use they were prized for producing a clear brew and were quite popular until the middle of the twentieth century.
Most drip filter makers function in the same simple manner: a paper filter sets in a basket (usually plastic) which holds the finely ground almost powdery bean. Cold water is poured into a chamber where it is heated and poured over the grounds. The brew is quickly extracted into a waiting carafe usually glass or thermal steel . The process is very simple and extremely reliable. Some have proclaimed that automatic drip coffee makers produce "off-tasting" flavors in the cup. I feel that those people need to either change or modify their coffee grind do not use reusable filters or should clean the drip maker as per the manufacturers directions.