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Acoffeemaker,coffee maker orcoffee machine is a cookingappliance used to brewcoffee. While there are many different types of coffeemakers, the two most common brewing principles use gravity or pressure to move hot water through coffee grounds. In the most common devices, coffee grounds are placed into a paper or metal filter inside a funnel, which is set over a glass or ceramiccoffee pot, acooking pot in thekettle family. Cold water is poured into a separate chamber, which is then boiled and directed into the funnel and allowed to drip through the grounds under gravity. This is also calledautomatic drip-brew. Coffee makers that use pressure to force water through the coffee grounds are called espresso makers, and they produce espresso coffee.
The first non-electricdrip coffee maker, using notebook paper as the precursor to the paper coffee filter, was developed by German entrepreneurMelitta Bentz in 1908. The same year, she founded theMelitta brand, specializing in coffee and coffee-making products.[1]
On 27 August 1930, Inez H. Peirce of Chicago, Illinois, filed her patent for the firstvacuum coffee maker that truly automated the vacuum brewing process, while eliminating the need for a stovetop burner or liquid fuels.[2]
Acafetière (coffee plunger, French press in US English) requires coffee of a coarser grind than does a drip-brewcoffee filter, as finer grounds will seep through the press filter and into the drink.[3]
Because the coffee grounds remain in direct contact with the brewing water and the grounds are filtered from the water via a mesh instead of a paper filter, coffee brewed with the cafetière captures more of the coffee's flavour andessential oils, which would become trapped in a traditional drip-brew machine's paper filters.[4] As with drip-brewed coffee, cafetière coffee can be brewed to any strength by adjusting the amount of ground coffee which is brewed. If the used grounds remain in the drink after brewing, French-pressed coffee left to stand can become "bitter", though this is an effect that many users of cafetière consider beneficial. For an 0.5-litre (17 US fl oz) cafetière, the contents are considered spoiled, by some reports, after around 20 minutes.[5]
A single-serve or single-cup coffeemaker brews coffee from a single-serve container, with several popular variations existing. These gained popularity in the 2000s.[6]
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