Odessa Obrien. Coffee Machines. December 30th , 2017.
In 1938, Milan coffee bartender, Achille Gaggia filed a Patent for a steam-free coffee machine. Unlike its predecessors, Gaggias design used a revolutionary piston mechanism which forced water through the coffee grounds at high pressure. It was his quest for the perfect espresso in 1930s Milan that gave birth to one of Italys most iconic brands, and heralded the production of the Espresso as we know it. Traditional Espresso Coffee Machines are the type you see in Café Nero, Costa Coffee etc.
One that is not as popular as all the others is the vacuum machine. They come in many shapes and sizes, yet they are more alike than they are different. This system heats the water in the lower chamber creating a water vapor. This increases the pressure in the lower chamber and forces the water upward into the upper chamber that you add just before the water begins to rise. Brew for about 1.5 minutes then remove from heat, the gases in the lower chamber cool and draws the brewed coffee downward via suction caused by a partial vacuum that ensures accurate extraction of oils and caffeine for a cleaner unit without the bitter taste.
In this situation Bulk Brew coffee machines are highly recommended. These machines can produce between 30 and 140 Litres of fresh filter coffee per hour. There are a number of popular brands for Pour and Serve and Bulk Brew coffee machines. Pour and Serve coffee machines range from a simple two Jug filter coffee machine with two hot plates or multiple hot plate Pour and Serve for up to four Jugs. The ultimate is a Bulk Brew coffee machine. These have one or two brewing columns. They have detachable brewing containers, capable of holding up to 40 Litres of coffee. The convenient control panels with LCD display makes it easy to adjust brewing times and volume requirements. The detachable brewing containers mean that high volumes of coffee can be served in different locations simultaneously. The other type of "filter" coffee machine is the RLX type from Bravilor. They are modular fresh filter machines with added hot water and steam facilities, ideal for producing hot water for teas as well as a steam for foaming and steaming milk.
Apart from all these structural and quality considerations, it is also worthwhile to consider the kind of coffee that you might want to serve. There are more than thousand varieties of coffee available right from the Café Mocha to the South Indian Filter Coffee; coffee with milk and without milk; coffee with sugar and without sugar; coffee with chocolate toppings or with a vanilla sundae on it. The possibilities are endless and so are the machines. There are different machines that are used to create various types of coffee and thus, as the methods of creating the coffee vary, the internal design and the make of the system also varies.
After the initial purchase of a single serve coffee machine which ranges in price from $85 to $190, the cost per cup of coffee is much less than that of a cup of coffee from a gourmet coffeehouse. The average cost per cup of coffee is anywhere from $0.65 to $1.25 with a Keurig coffee machine. Compare this to upwards of $5.00 per cup at a coffeehouse. You will save a lot of money with the single serve coffee brewer.
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