Filter medium and process for making same
US5609761A · kind A · utility
Inventor
Key dates
| Filing date | Sep 12, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Sep 12, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2265/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for the production of a filter medium in particular in the form of a pleated bellows for a filter cartridge for dust separation, at least one surface of the filter medium is provided with an embossed structure, consisting of a multitude of raised embossed elements, preferably in the form of burls or ribs. Furthermore such surfaces of the filter medium are subjected to an additional treatment in the area of the embossed spots by application of a layer of a curable, dryable coating mass and/or heat so that an added mechanical resistance/strength/abrasion resistance is obtained in the area of these treated embossed parts. Due to this process for the production of a filter medium it is possible to create a filter medium--in particular one consisting of mechanically sensitive materials, e.g., thermoplastic materials or non-wovens made from synthetic fibers--which can be provided with an embossed structure on at least one of its surfaces for the purpose of ensuring a sufficient distance between the pleats of the filter cartridge during the cleaning process. At the same time wear and tear of the filter material is precluded at the spots where the pleats touch each other despi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.