Editing Coffee percolator (section)

==Improvements==
The method for making coffee in a percolator had changed very little since the introduction of the electric percolator in the early part of the 20th century. However, in 1970 commercially available "[[ground coffee filter ring]]s" were introduced to the market. The coffee filter rings were designed for use in percolators, and each ring contained a pre-measured amount of coffee grounds that were sealed in a self-contained paper filter. The sealed rings resembled the shape of a doughnut, and the small hole in the middle of the ring enabled the coffee filter ring to be placed in the metal percolator basket around the protruding convection (percolator) tube.

Prior to the introduction of pre-measured self-contained ground coffee filter rings, fresh [[coffee grounds]] were measured out in scoopsful and placed into the metal percolator basket. This process enabled small amounts of coffee grounds to leak into the fresh coffee. Additionally, the process left wet grounds in the percolator basket. The benefit of the pre-packed coffee filter rings was two-fold: First, because the amount of coffee contained in the rings was pre-measured, it negated the need to measure each scoop and then place it in the metal percolator basket. Second, the filter paper was strong enough to hold all the coffee grounds within the sealed paper. After use, the coffee filter ring could be easily removed from the basket and discarded. This relieved the consumer from the task of cleaning out the wet coffee grounds from the percolator basket.

{{anchor|Aromat|Aromator}}
[[File:Aromator_(Urnenform).JPG|thumb|A German percolator named Neuerer Aromator in urn form]]
While most percolators use metal filter baskets the Neuerer Aromators used double-layered cross-slitted <!-- through-glazed? (Note: While actual Karsbad-style filters are through-glazed, I'm not sure about those similar filters used in the Aromators) --> porcelain filters<ref name="Aromator"/> similar to those in [[Karlsbad-style coffee maker]]s, not requiring any [[paper ring filter]]s.