Portafilter
Encyclopedia
A portafilter attaches to the group head
of semi-automatic and piston-driven espresso machine
s, and carries a tamped puck of coffee grounds within its basket. It is usually made of brass, and is attached by a plastic or wooden handle. The portafilter forms a seal with the espresso
machine's gasket, and directs high-pressure hot water through the coffee puck.
After-market
retailers also sell bottomless portafilters that minimize the espresso's contact with any metal. A bottomless portafilter is one tool barista
s use to analyze the quality of the coffee grind and the evenness of the extraction. Often baristas use knockbox
es to store their spent espresso grounds after they have pulled a shot.
Some home espresso machines come with a pressurized portafilter that is designed to make it easier to brew espresso with crema for novice users. The drawback of these portafilters is that the barista does not have much control over the quality of the shot.
Grouphead
A grouphead is a fixed component of an espresso machine. It is the receiver for the removable portafilter . A typical consumer espresso machine normally has only one grouphead, while popular professional machines, such as those used at commercial coffee shops, can contain anywhere from one to...
of semi-automatic and piston-driven espresso machine
Espresso machine
An espresso machine is used to produce the traditional Italian coffee beverage called espresso.-History:The first machine for making espresso was built and patented by Angelo Moriondo of Turin, Italy, who demonstrated a working example at the Turin General Exposition of 1884. He was granted patent no...
s, and carries a tamped puck of coffee grounds within its basket. It is usually made of brass, and is attached by a plastic or wooden handle. The portafilter forms a seal with the espresso
Espresso
Espresso is a concentrated beverage brewed by forcing a small amount of nearly boiling water under pressure through finely ground coffee. Espresso is widely known throughout the world....
machine's gasket, and directs high-pressure hot water through the coffee puck.
After-market
After-market (general)
After-market refers to any market where the customers who purchase one product or service are likely to purchase a related, follow-on product....
retailers also sell bottomless portafilters that minimize the espresso's contact with any metal. A bottomless portafilter is one tool barista
Barista
A barista is a person, usually a coffee-house employee, who prepares and serves espresso-based coffee drinks.- Application of the title :...
s use to analyze the quality of the coffee grind and the evenness of the extraction. Often baristas use knockbox
Knockbox
A knockbox, is a device used to store spent espresso grounds, called a puck, after a shot of espresso has been pulled. It is generally made out of stainless steel or plastic, and has a sturdy bar known as a "bash bar", against which a portafilter is tapped to release the puck...
es to store their spent espresso grounds after they have pulled a shot.
Some home espresso machines come with a pressurized portafilter that is designed to make it easier to brew espresso with crema for novice users. The drawback of these portafilters is that the barista does not have much control over the quality of the shot.