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  • Drip brewing, or filtered coffee, is a method which involves pouring water over roasted, ground coffee beans contained in a filter, creating the beverage called coffee. Water seeps through the ground coffee, absorbing its oils and essences, solely under gravity, then passes through the bottom of the filter. The used coffee grounds are retained in the filter with the liquid falling into a collecting vessel such as a carafe or pot. Paper coffee filters were invented in Germany by Melitta Bentz in 1908 and are commonly used for drip brew all over the world. In 1954 the Wigomat, invented by Gottlob Widmann, was patented in Germany being the first electrical drip brewer. Drip brew coffee makers replaced the coffee percolator in the 1970s due to the percolators' tendency to over-extract coffee, thereby making it bitter. One benefit of paper filters is that the used grounds and the filter may be disposed of together, without a need to clean the filter.

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