Magnetic recording device with unitary filter medium to trap organic and inorganic chemical pollutants
US5124856A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1216
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chemical filter assembly mounted in a breather opening in a housing for a magnetic storage device or other device to permit pressure equalization with the surrounding environment comprises at least one filter medium for removing particulate matter, and a unitary filter medium of a fabric of activated carbon fibers that is impregnated with a chemical that in combination with the carbon provides protection against both organic and inorganic gaseous or vapor pollutants, said fibers having a pore size small enough prevent significant penetration by aqueous solutions so that during impregnation the pores will not become clogged with the chemical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.