Vacuum cleaner filter bag
US8449639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2008 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Nov 30, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/1454
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The invention relates to a vacuum cleaner filter bag, including an inlet opening (3), a filter bag material which has an inner layer of nonwoven material (10) at least in the region of the inlet opening, and a holding plate (2) which is arranged on the outside of the filter bag in the region of the inlet opening, can be attached to a vacuum cleaner holding means for securing the vacuum cleaner filter bag and on which a closure device (4) for closing the inlet opening is provided, wherein the nonwoven material, in the region of the inlet opening, has a surface (20) which is provided in such a manner that the formation of a filter cake on said surface is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.