Patent US4359073A successfully refreshed from Google Patents.
Patent EP0507515A2 successfully refreshed from Google Patents.
EP0507515A2
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EP
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Magneto-optical disk with vibration dampening
Assignee: 3M Co
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Filing: 1992-03-27
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Granted: —
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Expires: 2012-03-27
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 (22) is secured to a side opposite from 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. C/O Minnesota Mining And Woo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:40
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: 9
Claim 1
Independent Claim
70 words
A magneto-optic disk comprising: a substrate and a magneto-optic film disposed on one side of the substrate defining a single recording side; and a dampening layer attached to the substrate on a side opposite from the single recording side, the dampening layer including a layer of polyester film of at least approximately 102 micrometers thick attached to the substrate by an adhesive layer of at least approximately 25.4 micrometers thick.
Claim 2
Dependent Claim
16 words
The disk of claim 1 wherein the dampening layer is a maximuym thickness of 0.2 mm.
Claim 3
Dependent Claim
19 words
The disk of claim 1 wherein the adhesive has a chloride content no greater than 1.5 parts per million.
Claim 4
Dependent Claim
29 words
The disk of claim 1 wherein the adhesive is selected from the group consisting of isoocytylacrylate-acrylic acid polymers, isooctylacrylate - acrylamide polymers, isooctylacrylate-methacrylic acid polymers, and hot melt adhesives.
Claim 5
Dependent Claim
18 words
The disk of claim 1 wherein the disk thickness including dampening layer is no greater than 1.4 mm.
Claim 6
Independent Claim
81 words
A method for dampening vibrations of a single recording side optical disk at a vibrational frequency of at least 840 HZ, the method comprizing: applying a dampening layer to the disk on a side opposite from the single recording side, the dampening layer comprising an adhesive layer and a film dampening layer comprising an adhesive layer and a film layer secured by the adhesive layer and made of a material selected from the group consisting of polyester, polyimide, and aluminum foil.
Claim 7
Dependent Claim
17 words
The method of claim 6 wherein the film layer is at least approximately 102 micrometers in thickness.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein the adhesive layer is at least approximately 25 micrometers in thickness.
Claim 9
Dependent Claim
16 words
The method of claim 6 wherein the dampening layer is greater than 150 micrometers in thickness.
References Cited (Backward Citations)
No citation records indexed.
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