Magnetic recording device with unitary filter medium to trap organic and inorganic chemical pollutants
AssigneeInternational Business Machines Corporation
InventorsCharles A. Brown, Leo Volpe, Herman R. Wendt
Life of this patent
Estimating the term…
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.
Claims14
In a magnetic recording storage device of the type enclosed by a housing means with a breather opening to permit pressure equalization with the surrounding environment, the combination with said housing means of a chemical filter assembly mounted in a path through which a fluid flows through said opening and comprising at least one filter medium for removing particulate pollutants from the fluid, and a unitary filter medium of fabric that contains activated carbon fibers having a pore size small enough to prevent significant penetration by aqueous solutions and is impregnated with a chemical that in combination with carbon in the carbon fibers provides protection against both organic and inorganic gaseous or vapor pollutants.
A magnetic recording storage device of the type comprising a head/disk assembly contained within a housing means having a breather opening to permit pressure equalization between the interior of the housing means and the surrounding environment and further comprising a chemical filter assembly mounted in a path through which a fluid flows through said opening, wherein the improvement comprises a fabric containing activated carbon fibers located in the filter assembly and having a pore size small enough to prevent significant penetration by aqueous solutions of the fluid, said fibers being impregnated with a chemical that in combination with the carbon fabric traps both organic and inorganic gaseous or vapor pollutants.
Dependencies are inferred from the claim text.