Filter paper cup for a percolator and process for making the same
US4098177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | May 13, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24455
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A percolator having a cylindrical basket concentric with a wand is provided with a filter paper cup having an annular bottom coextensive with the bottom of the basket and having upstanding fluted sides. The filter cups are formed by cutting and forming them into a nest of cups having an imperforate bottom, transferring the nest of cups to a frusto-conical die having a circular top commensurate with the circular bottom of the filter cups, a central die-hole, and outwardly and downwardly flaring sides corresponding to the natural outward flare of the nested cups, and punching an axial hole in said nested cups while on said die by means of a punch complementary with said die-hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.