Patent US1110762A successfully refreshed from Google Patents.
US3795435A
Expired / Lapsed
US
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Reflex light reflection sheet and method for its manufacture
Assignee: D Swarovski KG
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Filing: 1970-10-08
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Granted: 1974-03-05
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Expires: 1990-10-08
Abstract
Abstract Reflex light reflector sheet of the kind wherein a spacer layer is interposed between substantially spherical transparent beads and a rear mirror surface. The spacer layer is formed from a smooth, prefabricated self-supporting transparent plastic foil which is deformed so as to snugly conform to and envelope the rear contours of the spherical beads. The deformation of the spacer layer foil is accomplished by subjecting the foil with the beads placed thereon to a pressure differential such as by applying vacuum to one side of the foil. A plane cover layer may be superimposed on the front portion of the beads and the beads are bonded by a suitable binder.
Inventors
- 👤 K Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:09
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; G02B5/128; B; B29; B29C; B29C70/00; B29C70/58; B29C70/585; B29D; B29D11/00; B29D11/00605; B29D11/00615
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
In a reflex light reflector sheet, wherein a spacer layer is interposed between a reflecting surface and a stratum of minute, transparent substantially spherical bodies, the improvement which comprises that said spacer layer is a transparent plastic foil of substantially constant thickness, said foil, throughout its thickness, snugly conforming to and bearing against the rear contour of said spherical bodies, said spacer layer having a vacuum deposited material on the surface opposite said spherical bodies.
Claim 2
Dependent Claim
75 words
In a reflex light reflector sheet, wherein a spacer layer is interposed between a reflecting surface and a stratum of minute, transparent substantially spherical bodies, the improvement which comprises that said spacer layer is a transparent plastic foil of substantially constant thickness, said foil, throughout its thickness, snugly conforming to and bearing against the rear contour of said spherical bodies, said spacer layer having a vacuum deposited material on the surface opposite said spherical bodies.
Claim 3
Dependent Claim
26 words
The improvement of claim 1, wherein said spherical bodies are spaced from each other, the spaces between said bodies being filled by a cured bonding agent.
Claim 4
Dependent Claim
26 words
The improvement of claim 1, wherein the front contours of said spherical bodies are covered by at least one transparent layer forming a plane front surface.
Claim 5
Dependent Claim
10 words
The improvement of claim 1, wherein said foil is colored.
Claim 6
Dependent Claim
13 words
The improvement of claim 1, wherein said foil comprises a plurality of strata.
Claim 7
Dependent Claim
24 words
The improvement of claim 1, wherein said foil has a thickness which is about one-sixth to four-sixths of the average diameter of said bodies.
Claim 8
Dependent Claim
100 words
The improvement of claim 1, wherein the optical characteristics of the sheet essentially correspond to the formula h d X f, wherein h is the thickness of the spacer layer; d is the diameter of the bodies and f is the proportionality factor, f being equal to n3 ( n2 - 2n1 )/2n1 ( n3 - n2 ) + n3 ( n1 - n2 ), wherein n1 is the index of refraction of the medium in front of the bodies n2 is the index of refraction of the bodies and n3 is the index of refraction of the spacer layer.
Claim 9
Dependent Claim
29 words
The improvement of claim 7, wherein the deviation of the thickness h of the spacer layer according to said formula is at the most + or - 20 percent.
Claim 10
Dependent Claim
92 words
A reflex light reflector sheet comprising: a a plurality of substantially spherical transparent beads, each bead having a front hemisphere and a rear hemisphere, said beads being aligned in juxtaposed position to form a bead layer, b a spacer layer of transparent plastic material, said spacer layer snugly conforming to and surrounding at least a portion of said rear hemispheres, said spacer layer having an essentially constant thickness where said layer surrounds said rear hemispheres c a reflecting mirror layer of vacuuM deposited metal on the rear surface of said spacer layer.
Claim 11
Dependent Claim
92 words
A reflex light reflector sheet comprising: a a plurality of substantially spherical transparent beads, each bead having a front hemisphere and a rear hemisphere, said beads being aligned in juxtaposed position to form a bead layer, b a spacer layer of transparent plastic material, said spacer layer snugly conforming to and surrounding at least a portion of said rear hemispheres, said spacer layer having an essentially constant thickness where said layer surrounds said rear hemispheres c a reflecting mirror layer of vacuuM deposited metal on the rear surface of said spacer layer.
Claim 12
Dependent Claim
32 words
A reflex light reflector sheet as claimed in claim 9, wherein the front surface of said spacer layer contacts said rear hemispheres, and a cured bonding agent is positioned between adjacent beads.
Claim 13
Dependent Claim
27 words
A reflex light reflector sheet as claimed in claim 9, further comprising at least one cover layer covering said front hemispheres and having a plane front surface.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |