Patent US5458940A successfully refreshed from Google Patents.
US5458940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disk with vibration dampening
Assignee: 3M Co
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Filing: 1994-02-16
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Granted: 1995-10-17
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Expires: 2014-02-16
Abstract
Abstract A single recording side magneto-optic disk has improved dampening characteristics for rotation at high speeds such as 3,000 rpm or greater. A dampening layer is secured to the recording side. The dampening layer includes a film of at least approximately 102 micrometers in thickness attached to the disk by an adhesive layer of at least 25.4 micrometers in thickness.
Inventors
- 👤 Edward J. Woo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:05
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/08; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10584; G11B23/00; G11B23/0014; G11B23/0021; G11B7/00; G11B7/24; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A magneto-optic disk for use in a magneto-optic disk reading system wherein the disk rotates at at least 3,000 revolutions per minute, and wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein, the adhesive has a chloride content no greater than 1.5 parts per million, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
Claim 2
Dependent Claim
121 words
A magneto-optic disk for use in a magneto-optic disk reading system wherein the disk rotates at at least 3,000 revolutions per minute, and wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein, the adhesive has a chloride content no greater than 1.5 parts per million, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
Claim 3
Dependent Claim
127 words
A magneto-optic disk for use in a magneto-optic disk reading system wherein the disk rotates at at least 3,000 revolutions per minute, and wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on the side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein, the adhesive is selected from the group consisting of isooctyl acrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
Claim 4
Dependent Claim
127 words
A magneto-optic disk for use in a magneto-optic disk reading system wherein the disk rotates at at least 3,000 revolutions per minute, and wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on the side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein, the adhesive is selected from the group consisting of isooctyl acrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
Claim 5
Independent Claim
100 words
A method of using a dampening layer for dampening vibrations of a magneto-optic disk rotating at least 3,000 revolutions per minute, wherein the disk has a vibrational frequency of at least 850 HZ, the method comprising: applying a dampening layer to the disk on the single recording side, the dampening layer comprising an adhesive layer and a film layer secured by the adhesive layer, wherein the adhesive layer has a chloride content no greater than 1.5 parts per million, and wherein the film layer is made of a material selected from the group consisting of polyester, polyimide, and aluminum foil.
Claim 6
Independent Claim
100 words
A method of using a dampening layer for dampening vibrations of a magneto-optic disk rotating at least 3,000 revolutions per minute, wherein the disk has a vibrational frequency of at least 850 HZ, the method comprising: applying a dampening layer to the disk on the single recording side, the dampening layer comprising an adhesive layer and a film layer secured by the adhesive layer, wherein the adhesive layer has a chloride content no greater than 1.5 parts per million, and wherein the film layer is made of a material selected from the group consisting of polyester, polyimide, and aluminum foil.
Claim 7
Independent Claim
105 words
A method of using a dampening layer for dampening vibrations of a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk has a vibrational frequency of at least 850 HZ, the method comprising: applying a dampening layer to the disk on the single recording side, the dampening layer comprising an adhesive layer and a film layer secured by the adhesive layer, wherein the adhesive is selected from the group consisting of isooctylacrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the film layer is made of a material selected from the group consisting of polyester, polyimide, and aluminum foil.
Claim 8
Independent Claim
105 words
A method of using a dampening layer for dampening vibrations of a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk has a vibrational frequency of at least 850 HZ, the method comprising: applying a dampening layer to the disk on the single recording side, the dampening layer comprising an adhesive layer and a film layer secured by the adhesive layer, wherein the adhesive is selected from the group consisting of isooctylacrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the film layer is made of a material selected from the group consisting of polyester, polyimide, and aluminum foil.
Claim 9
Dependent Claim
115 words
In a magneto-optic disk reading system, a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein the adhesive has a chloride content no greater than 1.5 parts per million, and wherein the dampening layer dampens vibrations in the magneto-optic disk the vibrations having a frequency of at least 850 Hz.
Claim 10
Dependent Claim
115 words
In a magneto-optic disk reading system, a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein the adhesive has a chloride content no greater than 1.5 parts per million, and wherein the dampening layer dampens vibrations in the magneto-optic disk the vibrations having a frequency of at least 850 Hz.
Claim 11
Dependent Claim
120 words
In a magneto-optic disk reading system, a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein the adhesive is selected from the group consisting of isooctylacrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
Claim 12
Dependent Claim
120 words
In a magneto-optic disk reading system, a magneto-optic disk rotating at at least 3,000 revolutions per minute, wherein the disk comprises: a substrate and a magneto-optic film disposed on one side of the substrate; and a dampening layer provided on a side of the magneto-optic film opposite the substrate, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick secured to the disk by an adhesive layer of at least approximately 25.4 micrometers thick, wherein the adhesive is selected from the group consisting of isooctylacrylate-acrylic acid polymers, isooctylacrylate-acrylamide polymers, and isooctylacrylate-methacrylic acid polymers, and wherein the dampening layer dampens vibrations in the magneto-optic disk, the vibrations having a frequency of at least 850 Hz.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-10-16 | 1999-04-17 | 1999-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-16 | 2003-04-17 | 2003-10-17 | $3760.00 | Window Closed / Lapsed |
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