US4419164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a self-lubricating liner
Assignee: Verbatim Corp
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Filing: 1982-07-01
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Granted: 1983-12-06
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Expires: 2002-07-01
Abstract
Abstract An improved floppy disk having a liner material into the fibers of which has been compounded identically the same lubricant as that compounded into the surface of the magnetic recording disk.
Inventors
- 👤 Lawrence G. Martinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
An improved method for manufacturing a lubricated liner for a floppy disk assembly of the type wherein the assembly includes a disk provided with a magnetic coating including a lubricant compounded therein, the improvement comprising the steps of: infusing a lubricant, identical to the lubricant compounded into the magnetic coating of the disk, into a precursor material; extruding fibers from the lubricant-infused precursor material; and binding the extruded fibers together to form a fibrous liner for abutting against the coating surface of the disk; wherein said lubricant infused into said precursor material is of a quantity sufficient to produce the result that, for the finished floppy disk assembly, migration of lubricant from said disk to said fibrous liner is substantially less than if said lubricant were not infused into said precursor material.
Claim 2
Dependent Claim
132 words
An improved method for manufacturing a lubricated liner for a floppy disk assembly of the type wherein the assembly includes a disk provided with a magnetic coating including a lubricant compounded therein, the improvement comprising the steps of: infusing a lubricant, identical to the lubricant compounded into the magnetic coating of the disk, into a precursor material; extruding fibers from the lubricant-infused precursor material; and binding the extruded fibers together to form a fibrous liner for abutting against the coating surface of the disk; wherein said lubricant infused into said precursor material is of a quantity sufficient to produce the result that, for the finished floppy disk assembly, migration of lubricant from said disk to said fibrous liner is substantially less than if said lubricant were not infused into said precursor material.
Claim 3
Dependent Claim
137 words
An improved method for manufacturing a lubricated liner for a floppy disk assembly of the type wherein the assembly includes a disk provided with a magnetic coating including a lubricant compounded therein, the improvement comprising the steps of: thoroughly mixing a lubricant, identical to the lubricant compounded into the magnetic coating of the disk, into a solution of binder material; and applying the binder material-lubricant mixture to a mass of loose fibers to bind said fibers into a fibrous liner for abutting against the coated surface of the disk; wherein said lubricant mixed into said binder material is of a quantity sufficient to produce the result that, for the finished floppy disk assembly, migration of lubricant from said disk to said fibrous liner is substantially less than if said lubricant were not mixed into said binder material.
Claim 4
Dependent Claim
137 words
An improved method for manufacturing a lubricated liner for a floppy disk assembly of the type wherein the assembly includes a disk provided with a magnetic coating including a lubricant compounded therein, the improvement comprising the steps of: thoroughly mixing a lubricant, identical to the lubricant compounded into the magnetic coating of the disk, into a solution of binder material; and applying the binder material-lubricant mixture to a mass of loose fibers to bind said fibers into a fibrous liner for abutting against the coated surface of the disk; wherein said lubricant mixed into said binder material is of a quantity sufficient to produce the result that, for the finished floppy disk assembly, migration of lubricant from said disk to said fibrous liner is substantially less than if said lubricant were not mixed into said binder material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |