Espresso machine
Device that forces pressurized hot water through coffee grounds.
HungryHuy · via Wikipedia: Espresso machine · CC BY 2.0
An espresso machine brews coffee by forcing hot, pressurized water through a small, compacted cake of finely ground coffee and a filter. This process creates a thick, concentrated coffee drink known as espresso. These machines come in many designs and operating styles. They can be powered by steam, a piston, a pump, or an air pump, and their operation may be manual, semi-automatic, or fully automatic. Some models include a built-in coffee grinder, and superautomatic machines handle the entire brewing process with a single touch from the user. Sizes range from small home appliances to large commercial machines and coffee vending machines, including "prosumer" models that bring professional features into a consumer product. Despite this variety, many espresso machines share common parts. These include a portafilter—which has a filter basket, a locking mechanism, and a handle for attachment—and a grouphead, where the portafilter locks in before brewing. The grouphead is where the hot, pressurized water enters the coffee puck before filtration. Many machines also have a steam wand (or multiple wands) for steaming and frothing milk or non-dairy alternatives, producing microfoam used in drinks like cappuccino and caffè latte, as well as for latte art. Angelo Moriondo of Turin patented a steam-driven device for making "instantaneous" coffee beverages in 1884. This machine is considered the first Italian bar machine to separately control steam and water through the coffee, and Moriondo is regarded as one of the earliest inventors of the espresso machine. However, it brewed coffee in bulk rather than as individual servings. Seventeen years later, in 1901, Luigi Bezzera of Milan patented several improvements to the espresso machine. His first patent, titled "Innovations in the machinery to prepare and immediately serve coffee beverage," was filed in December 1901 and granted in June 1902. In 1903, Desiderio Pavoni bought the patent, founded La Pavoni, and began industrial production, manufacturing one machine per day in a small Milan workshop. Many machine designs have been created to produce espresso. Adjusting the fineness of the coffee grind, the pressure used to tamp the grounds, or the water pressure itself can change the taste of the espresso.
- Field
- Coffee brewing technology
- Known for
- Production of espresso coffee
Lore & Background
Angelo Moriondo, from Turin, patented a steam-driven coffee beverage making device in 1884. The device is almost certainly the first Italian bar machine that controlled the supply of steam and water separately through the coffee, and Moriondo is certainly one of the earliest discoverers of the expresso machine, if not the earliest. Unlike true espresso machines, it brewed in bulk, not as individual servings. Seventeen years later, in 1901, Luigi Bezzera, from Milan, devised and patented several improvements to the espresso machine. In 1903, the patent was bought by Desiderio Pavoni, who founded the La Pavoni company and began to produce the machine industrially.
The piston-driven, or lever-driven, machine was developed in Italy in 1945 by Achille Gaggia. The design uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grounds. The act of producing a shot of espresso is colloquially termed pulling a shot, because these lever-driven espresso machines required pulling a long handle to produce a shot. A refinement of the piston machine is the pump-driven machine, introduced in the Faema E61 in 1961, which has become the most popular design in commercial espresso bars.
Reader's Guide
The espresso machine has had a profound impact on coffee culture and the global beverage industry. Its development from steam-driven bulk brewers to precise pump-driven machines enabled the creation of espresso as a distinct, concentrated coffee with a characteristic crema. The introduction of the piston-driven machine by Achille Gaggia in 1945 allowed for higher pressure extraction, improving the quality of the crema. The pump-driven Faema E61 of 1961 further refined the process, making it the dominant design in commercial settings. The machine's evolution also gave rise to a variety of home and commercial models, including superautomatic machines that automate the entire process. The auxiliary steam wand, used for steaming and frothing milk, enabled the creation of popular coffee drinks such as cappuccino and caffè latte, as well as latte art. The espresso machine remains central to coffee preparation worldwide, with ongoing variations in drive mechanism, boiler configuration, and automation level.
Did You Know?
- Angelo Moriondo patented a steam-driven coffee beverage device in 1884, which brewed in bulk rather than individual servings.
- The term 'pulling a shot' originates from lever-driven espresso machines that required pulling a long handle.
- The pump-driven espresso machine was introduced in the Faema E61 in 1961.
- Some espresso machines incorporate a built-in coffee grinder and can produce a shot with a single touch.
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