Coffee machine
US4254694A · kind A · utility
Inventor
Key dates
| Filing date | May 29, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | May 29, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/0668
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A coffee machine has an assembly provided with a chamber for receiving a permanent filter selected, according to the taste preference of a user, from a set of such filters which each offer different flow resistance to water per unit time. A pod of ground compressed coffee is also removably receivable in the chamber; the characteristics of pod and filter are so selected that during each operation of the machine between 22-26% of the total aromatic substances present in the coffee in the pod, are extracted by hot water flowing through the pod. However, due to the different flow resistance offered by different filters, the quantity of beverage produced during a predetermined operating time will vary. In dependence upon the particular selected filter, the extracted aromatic substances will therefore be more or less diluted in the beverage, to suit a particular taste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.