Self-lubricating liner

Claim 2

An improved floppy disk assembly of the type having a circular disk of magnetic recording material enclosed within an envelope formed from material fabricated by bonding together a layer of porous, fibrous, low-friction, anti-static material and a layer of solid material, wherein the improvement comprises employing porous, fibrous, low-friction, anti-static liner material into which a lubricant, identical to that compounded into the coating of the circular disk of flexible material, has been compounded.

Claim 3

An improved floppy disk assembly of the type having a circular disk which has been coated with magnetic recording material and where the disk is enclosed within an envelope formed with an interior fibrous liner contacting the surface of the disk, the improvement comprising, in combination: a lubricant incorporated into the magnetic recording material coating on the disk in such a manner so as to allow its migration to the surface of the disk to provide lubrication between the disk and everything which it contacts; and a lubricant incorporated into the fibrous lining of the envelope which is of the identical type as the lubricant incorporated into the coating on the disk, and incorporated in a manner so as to allow its migration to the surface of the liner and providing a lubricant layer wherever the liner is in contact with the disk, and further, incorporated in a quantity such that the concentration of lubricant at the surface of the fiberous liner corresponds to the concentration of lubricant on the surface of the disk to establish an equalibrium in the normal migration of lubricant from the disk to the fibrous liner and from the fibrous liner to the disk; whereby the net transfer of lubricant across the contacting interface between the disk and the fibrous liner is essentially zero, and the concentration of lubricant on the surface of the disk remains stable over extended periods of time and operation of the floppy disk assembly.

Claim 4

An improved floppy disk assembly of the type having a circular disk which has been coated with magnetic recording material and where the disk is enclosed within an envelope formed with an interior fibrous liner contacting the surface of the disk, the improvement comprising, in combination: a lubricant incorporated into the magnetic recording material coating on the disk in such a manner so as to allow its migration to the surface of the disk to provide lubrication between the disk and everything which it contacts; and a lubricant incorporated into the fibrous lining of the envelope which is of the identical type as the lubricant incorporated into the coating on the disk, and incorporated in a manner so as to allow its migration to the surface of the liner and providing a lubricant layer wherever the liner is in contact with the disk, and further, incorporated in a quantity such that the concentration of lubricant at the surface of the fiberous liner corresponds to the concentration of lubricant on the surface of the disk to establish an equalibrium in the normal migration of lubricant from the disk to the fibrous liner and from the fibrous liner to the disk; whereby the net transfer of lubricant across the contacting interface between the disk and the fibrous liner is essentially zero, and the concentration of lubricant on the surface of the disk remains stable over extended periods of time and operation of the floppy disk assembly.

Claim 5

The improvement of claim 2 wherein the lubricant is a fatty acid having twelve or more carbon atoms.

Claim 6

The improvement of claim 2 wherein the lubricant is a fatty acid ester of a hydrocarbon having twelve or more carbon atoms.

Claim 7

The improvement of claim 2 wherein the lubricant is infused with the individual fibers of the liner rather than applied in patches or globules.

Claim 8

The improvement of claim 2 wherein the individual fibers of the fibrous liner are bound together by a binder material pervading the fibrous liner and the lubricant is dispersed throughout the liner conjunctively with said binder material.