Coffee filter material and coffee filter bag
US5496573A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D39/163
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A coffee filter material and bag suitable for providing a high-quality coffee extract, having a nonwoven fabric filter layer which is composed of thermoplastic organic synthetic fibers, satisfies the relationships (1) to (4): EQU 3.ltoreq.x.ltoreq.30 (1) EQU y.gtoreq.0.2x (2) EQU 1.ltoreq.r.sub.30 (3) and EQU r.sub.70 .ltoreq.50 (4) wherein x is a basis weight (g/m.sup.2) of the woven fabric, y is a cumulative volume value (cm.sup.3 /g) of fine pores in the nonwoven fabric, r.sub.30 is a maximum radius (.mu.m) of the fine pores observed when the volumes of the fine pores are cumulated from the small pore radius side and the cumulative volume value becomes equal to 0.3y, and r.sub.70 is a maximum radium (.mu.m) of the fine pores observed when the volumes of the fine pores are cumulated from the small pore radius side and the cumulative volume value becomes equal to 0.7y, and is capable of absorbing in the wet state thereof at least 0.5 g/g of an oil and fat component from the coffee extract.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.