US4586606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonwoven fabric
Assignee: Fitesa Simpsonville Inc
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Filing: 1983-10-28
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Granted: 1986-05-06
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Expires: 2003-10-28
Abstract
Abstract Nonwoven fabrics are described comprising a layered fabric having an inner layer of substantially thermoplastic material, for example fibers, disposed adjacent and thermally bonded to at least one outer layer or a pair of outer layers of textile length fibers by means of heat and pressure. The thermoplastic fibers in the inner layer have a lower melting point than any other fibers in the fabric. A nonwoven fabric constructed in this manner has qualities of; low levels of debris, high compressibility, low abrasiveness, and dimensional stability. These qualities are decidedly of use in many products, most particularly in computer diskettes, wherein a material must be used to wipe the magnetic disk within the computer diskette to keep it free of foreign particles, which may cause errors in the transfer of information onto or from the magnetic disk.
Inventors
- 👤 Jon A. Howey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/559; D04H1/541; D04H1/5418; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24595; Y10T428/24603; Y10T428/24612; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A computer diskette liner material comprising; an inner layer of substantially low melting point thermoplastic fibers, and at least one outer layer of predominately non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed discrete bonding points.
Claim 2
Dependent Claim
45 words
A computer diskette liner material comprising; an inner layer of substantially low melting point thermoplastic fibers, and at least one outer layer of predominately non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed discrete bonding points.
Claim 3
Dependent Claim
30 words
The computer diskette liner material of claim 1 wherein said inner layer is of low melting thermoplastic fibers consisting of synthetic fibers, or a blend of synthetic and natural fibers.
Claim 4
Dependent Claim
25 words
The computer diskette liner material of claim 1 wherein said outer layer is comprised of cellulosic fibers or a blend of cellulosic and synthetic fibers.
Claim 5
Dependent Claim
24 words
The computer diskette liner material of claim 1 wherein the surface of all the fibers used in said material are substantially free of delusterant.
Claim 6
Dependent Claim
18 words
The computer diskette liner material of claim 1 wherein said material has at least a 75% void volume.
Claim 7
Dependent Claim
18 words
The computer diskette liner material of claim 1 wherein said material has 10%-40% of its surface area bonded.
Claim 8
Dependent Claim
75 words
In a computer diskette having a flat plastic container, a nonwoven fabric liner disposed therein, and a flexible magnetic disk disposed thereon, in surface contact with said nonwoven liner, wherein the improvement comprises: a nonwoven liner having an inner layer of substantially low melting point thermoplastic fibers; and at least one outer layer of predominantely non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed bonding points.
Claim 9
Dependent Claim
75 words
In a computer diskette having a flat plastic container, a nonwoven fabric liner disposed therein, and a flexible magnetic disk disposed thereon, in surface contact with said nonwoven liner, wherein the improvement comprises: a nonwoven liner having an inner layer of substantially low melting point thermoplastic fibers; and at least one outer layer of predominantely non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed bonding points.
Claim 10
Dependent Claim
17 words
The nonwoven fabric liner of claim 7 wherein said fabric has at least a 75% void volume.
Claim 11
Dependent Claim
17 words
The nonwoven fabric liner of claim 7 wherein said fabric has 10%-40% of its surface area bonded.
Claim 12
Dependent Claim
44 words
A recording medium wiping fabric comprising: an inner layer of substantially low melting point thermoplastic fibers, and at least one outer layer of predominantely non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed bonding points.
Claim 13
Dependent Claim
44 words
A recording medium wiping fabric comprising: an inner layer of substantially low melting point thermoplastic fibers, and at least one outer layer of predominantely non-thermoplastic textile length fibers, said inner and outer layers thermally bonded together only in a plurality of recessed bonding points.
Claim 14
Dependent Claim
26 words
The recording medium wiping fabric of claim 10 wherein said low melting thermoplastic fibers consist of synthetic fibers or a blend of synthetic and natural fibers.
Claim 15
Dependent Claim
26 words
The recording medium wiping fabric of claim 10 wherein said outer layer is comprised of cellulosic fibers or a blend of synthetic fibers and cellulosic fibers.
Claim 16
Dependent Claim
16 words
The recording medium wiping fabric of claim 10 wherein all fibers are substantially free of delusterant.
Claim 17
Dependent Claim
18 words
The recording medium wiping fabric of claim 10 wherein said fabric has at least a 75% void volume.
Claim 18
Dependent Claim
18 words
The recording medium wiping fabric of claim 10 wherein said fabric has 10%-40% of its surface area bonded.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |