Patent US4417291A successfully refreshed from Google Patents.
US4417291A
Expired / Lapsed
US
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Recording diskette having flocked-fiber wiping fabric
Assignee: 3M Co
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Filing: 1981-09-14
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Granted: 1983-11-22
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Expires: 2001-09-14
Abstract
Abstract Magnetic recording diskette has as the wiping fabric a flocked-fiber layer. While prior diskettes have required individual pieces of wiping fabric to be adhered to individual sheets of jacket material, the flocked-fiber layer can be applied to a roll of the jacket material continuously to provide roll stock from which individual jacket blanks can be die-cut.
Inventors
- 👤 Richard L. Miklos
- 👤 Craig F. Lamphere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
Improved diskettes, each of which comprises a thin jacket containing a flexible recording disk and a wiping fabric bonded to the jacket in facing relationship to the disk, wherein the improvement comprises: (a) the wiping fabric being comprised of a layer of short, closely-spaced fibers, one end of each fiber being bonded directly to the jacket; and (b) diskette jacket walls which do not vary in thickness more than 3 mils.
Claim 2
Dependent Claim
71 words
Improved diskettes, each of which comprises a thin jacket containing a flexible recording disk and a wiping fabric bonded to the jacket in facing relationship to the disk, wherein the improvement comprises: (a) the wiping fabric being comprised of a layer of short, closely-spaced fibers, one end of each fiber being bonded directly to the jacket; and (b) diskette jacket walls which do not vary in thickness more than 3 mils.
Claim 3
Dependent Claim
16 words
Diskettes as defined in claim 1, wherein variations in jacket wall thickness are within 2 mils.
Claim 4
Dependent Claim
22 words
Diskettes as defined in claim 1, wherein said fibers predominantly are 1 to 6 denier and 0.05 to 0.8 mm in length.
Claim 5
Dependent Claim
22 words
Diskettes as defined in claim 1, wherein said fibers are present in the amount of 0.5 to 3 ounces per square yard.
Claim 6
Dependent Claim
22 words
Diskettes as defined in claim 1, wherein said fibers are selected from at least one of rayon, nylon, polyester, acrylic and cotton.
Claim 7
Dependent Claim
19 words
Diskettes as defined in claim 1, wherein said layer of fibers completely covers the inner face of the jacket.
Claim 8
Dependent Claim
22 words
Diskettes as defined in claim 1, wherein said layer of fibers covers only a portion of the inner face of the jacket.
Claim 9
Dependent Claim
69 words
An improved composite diskette jacket material comprising a sheet of jacket material bonded to a wiping fabric, wherein the improvement comprises: (a) a wiping fabric comprising a layer of short, closely-spaced, flocked fibers; (b) said fibers being predominantly 1 to 6 denier and 0.05 to 0.8 mm in length; whereby the variation in thickness of the cmposite diskette jacket material is not more than plus or minus 1.5 mils.
Claim 10
Dependent Claim
69 words
An improved composite diskette jacket material comprising a sheet of jacket material bonded to a wiping fabric, wherein the improvement comprises: (a) a wiping fabric comprising a layer of short, closely-spaced, flocked fibers; (b) said fibers being predominantly 1 to 6 denier and 0.05 to 0.8 mm in length; whereby the variation in thickness of the cmposite diskette jacket material is not more than plus or minus 1.5 mils.
Claim 11
Dependent Claim
27 words
The improved composite diskette jacket material of claim 8 wherein the density of the flocked fiber is 17 to 102 grams per square meter of jacket material.
Claim 12
Dependent Claim
12 words
A diskette jacket made from the diskette jacket material of claim 8.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |