Tea bag with strengthened centerfold
US5322700A · kind A · utility
3Cited by
23References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Nov 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/941
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A double-chamber tea bag has a centerfold that is crimped by squeezing it between a toothed wheel and a plain wheel and a headfold in which the front chamber has a flap that folds over the part of the end of the front chamber between triangular folds at each corner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.