Patent US3832547A successfully refreshed from Google Patents.
US3832547A
Expired / Lapsed
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Apparatus for transferring a unique micropattern of microperforations in a first metal layer to an underlying second metal layer
Assignee: Individual
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Filing: 1972-06-13
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Granted: 1974-08-27
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Expires: 1992-06-13
Abstract
Abstract In the field of the storage and retrieval of information, information records in the form of patterns of microspots of small size and high packing density are formed on a record web by the use of a focussed first laser beam, of a first level of intensity, to evaporate or burn away material to form microperforations in a thin layer of opaque first material on a web of transparent plastic. This invention covers the process of preparing a facsimile record of the pattern of microspots on a master record by exposing a second record web through the microperforations to a focussed second laser beam of less intensity than the first level of intensity.
Inventors
- 👤 D Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:23
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; B; B23; B23K; B23K26/00; B23K26/18; B44; B44B; B44B7/00; B23K2101/00; B23K2101/007
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
259 words
A system for directly transferring iNformation in the form of a unique micropattern of microperforations in a thin first metal layer to an underlying thin second metal layer, comprising: a. a master record web comprising a first thin metal layer carrying information in the form of a first unique micropattern of microperforations, said first metal layer composed of a first metal, of a first thickness of a first thermal characteristic; b. a facsimile record web comprising a base portion and a second thin metal surface layer, said second metal layer composed of a scond metal, of a second thickness of a second thermal characteristic; c. means to press said master web superimposed in intimate contiguous coplanar relation on top of said facsimile record so that each web remains in fixed relation with respect to the other web; d. optical means to focus a continuous beam of laser radiation of a selected constant level of intensity on the surface of said master web, and means to relatively move said optical means over substantially the entire area of said master web in a plurality of parallel paths, at a selected velocity; and wherein e. said first metal is different from said second metal in that said first metal has a higher melting point than the melting point of said second metal; whereby said focussed beam will penetrate said microperforations in said first metal layer and irradiate said second metal layer below, and will burn microperforations in said second metal layer in a second micropattern which is identical to said first micropattern.
Claim 2
Independent Claim
259 words
A system for directly transferring iNformation in the form of a unique micropattern of microperforations in a thin first metal layer to an underlying thin second metal layer, comprising: a. a master record web comprising a first thin metal layer carrying information in the form of a first unique micropattern of microperforations, said first metal layer composed of a first metal, of a first thickness of a first thermal characteristic; b. a facsimile record web comprising a base portion and a second thin metal surface layer, said second metal layer composed of a scond metal, of a second thickness of a second thermal characteristic; c. means to press said master web superimposed in intimate contiguous coplanar relation on top of said facsimile record so that each web remains in fixed relation with respect to the other web; d. optical means to focus a continuous beam of laser radiation of a selected constant level of intensity on the surface of said master web, and means to relatively move said optical means over substantially the entire area of said master web in a plurality of parallel paths, at a selected velocity; and wherein e. said first metal is different from said second metal in that said first metal has a higher melting point than the melting point of said second metal; whereby said focussed beam will penetrate said microperforations in said first metal layer and irradiate said second metal layer below, and will burn microperforations in said second metal layer in a second micropattern which is identical to said first micropattern.
Claim 3
Dependent Claim
19 words
The system as in claim 1 in which said first metal layer is thicker than said second metal layer.
Claim 4
Dependent Claim
26 words
The system as in claim 1 in which said first pattern of microperforations comprises a two-dimensional array of microperforations arranged in a plurality of spaced columns.
Claim 5
Dependent Claim
16 words
The system as in claim 3 in which said parallel paths are parallel to said columns.
Claim 6
Dependent Claim
16 words
The system as in claim 4 in which said parallel paths overlie each of said columns.
Claim 7
Dependent Claim
13 words
The system as in claim 1 in which said parallel paths are arcuate.
Claim 8
Dependent Claim
25 words
The system as in claim 1 in which said master web comprises said first metal layer in intimate contiguous contact with a laser-transparent base layer.
Claim 9
Dependent Claim
22 words
The system as in claim 7 in which said master web is placed on said facsimile web with said first material uppermost.
Claim 10
Dependent Claim
27 words
The system as in claim 7 in which said master web is placed on said facsimile web with said first material in contact with said second material.
Claim 11
Dependent Claim
21 words
The system as in claim 1 in which said focussed beam is directed perpendicular to the surface of said master web.
Claim 12
Dependent Claim
13 words
The system as in claim 1 in which said parallel paths are contiguous.
Claim 13
Dependent Claim
30 words
The system as in claim 1 in which said master web is circular, and said first pattern comprises a plurality of microperforations arranged in a plurality of concentric spaced circles.
Claim 14
Dependent Claim
21 words
The system as in claim 1 in which the thickness of said second thin metal layer is less than 0.005 inch.
Claim 15
Dependent Claim
21 words
The system as in claim 1 in which the thickness of said second thin metal layer is less than 0.001 inch.
Claim 16
Dependent Claim
15 words
The system as in claim 1 in which said microperforations have substantially a circular shape.
Claim 17
Dependent Claim
14 words
The system as in claim 1 in which said microperforations have a non-circular shape.
Claim 18
Dependent Claim
19 words
The system as in claim 1 in which said first material has a thickness of less than 0.010 inch.
Claim 19
Dependent Claim
19 words
The system as in claim 1 in which said first material is rhodium and said second material is aluminum.
Claim 20
Dependent Claim
19 words
The information system as in claim 1 in which said first material is a thin evaporated film of metal.
Claim 21
Dependent Claim
18 words
The system as in claim 1 in which said second material is a thin evaporated film of metal.
Claim 22
Dependent Claim
24 words
The system as in claim 1 in which the beam passing through the microperforations in said first metal is focussed on said second metal.
References Cited (Backward Citations)
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |