Filter bag
US6599420B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2000 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Jul 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/27
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter bag (1) comprises a first thin plastic film (22); a second thin plastic film (21) having substantially the same size with the first plastic film and sealed to the first plastic film at a first side-peripheral edge (2a), a second side-peripheral edge (2b) opposite to the first side-peripheral edge and a bottom peripheral edge (2d) thereof to provide an open-top interior, and a filter sheet (5) having a length substantially equal to the first and second plastic films and a width smaller than the first and second plastic films. The filter sheet has a first longitudinal edge (5a) interposed and sealed together between the first side-peripheral edges of the first and second plastic films and a second longitudinal edge (5b), opposite to the first longitudinal edge, sealed to the inside of the first plastic film at an intermediate position in width of the filter bag. The filter sheet is also sealed to the inside of the second plastic film, in vicinity to the first longitudinal edge, to provide a half-length seam (5c) extending from the open top edge halfway toward the bottom of the filter bag. A sample receiving section (3) of a larger volume is defined between the first and seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.