US3853675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials adapted to exhibit varying visual appearances
Assignee: De la Rue International Ltd
•
Filing: 1971-12-29
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Granted: 1974-12-10
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Expires: 1991-12-29
Abstract
Abstract Sheet material comprising two superimposed differently coloured light-transmitting non-fibrous layers and between the layers and in substantially intimate contact therewith a partially lighttransmitting layer is herein defined, the colors of the lighttransmitting layers being so selected that when either face of the material is viewed by transmitted light from a source of a substantially white light, the color observed is different from that observed when either layer alone is viewed in like manner.
Inventors
- 👤 C Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:21
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B44; B44F; B44F1/00; B44F1/06; B44F1/066; B32B23/00; B32B23/04; B32B3/00; B32B3/26; B32B3/266; B32B7/00; B32B7/04; B32B7/12; B44F1/08; B44F1/10; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/418; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24934; Y10T428/26; Y10T428/266
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
SHEET MATERIAL COMPRISING AT LEAST TWO SUPERIMPOSED COLORED LIGHT-TRANSMITTING NON-FIBROUS ORGANIC POLYMER FILMFORMING LAYERS, EACH LAYER OF A PAIR OF LAYERS BEING DIFFERENTLY COLORED, AND BETWEEN EACH ADJACENT PAIR OF SAID LAYERS AND IN SUBSTANTIALLY INTIMATE CONTACT THEREWITH A SINGLE SUBSTANTIALLY PLANAR LAYER WHICH IS PARTIALLY LIGHT-REFLECTING AND PARTIALLY LIGHT-TRANSMITTING WITH THE RATIO OF THE INTENSITY OF TRANSMITTED LIGHT TO THE INTENSITY OF REFLECTED LIGHT BEING DEPENDENT UPON THE ANGLE OF INCIDENCE OF THE LIGHT AND BEING A MAXIMUM WHEN THE ANGLE OF INCIDENCE IS NORMAL TO SAID LAYER, THE COLORS OF THE LIGHT-TRANSMITTING LAYERS BEING SO SELECTED THAT WHEN EITHER FACE OF THE COMPOSITE MATERIAL IS VIEWED BY TRANSMITTED LIGHT FROM A SOURCE OF SUBSTANTIALLY WHITE LIGHT THE COLOR OBSERVED IS DIFFERENT FROM THE OBSERVED WHEN ANY LIGHT-TRANSMITTING LAYER ALONE IS VIEWED IN LIKE MANNER.
Claim 2
Dependent Claim
136 words
SHEET MATERIAL COMPRISING AT LEAST TWO SUPERIMPOSED COLORED LIGHT-TRANSMITTING NON-FIBROUS ORGANIC POLYMER FILMFORMING LAYERS, EACH LAYER OF A PAIR OF LAYERS BEING DIFFERENTLY COLORED, AND BETWEEN EACH ADJACENT PAIR OF SAID LAYERS AND IN SUBSTANTIALLY INTIMATE CONTACT THEREWITH A SINGLE SUBSTANTIALLY PLANAR LAYER WHICH IS PARTIALLY LIGHT-REFLECTING AND PARTIALLY LIGHT-TRANSMITTING WITH THE RATIO OF THE INTENSITY OF TRANSMITTED LIGHT TO THE INTENSITY OF REFLECTED LIGHT BEING DEPENDENT UPON THE ANGLE OF INCIDENCE OF THE LIGHT AND BEING A MAXIMUM WHEN THE ANGLE OF INCIDENCE IS NORMAL TO SAID LAYER, THE COLORS OF THE LIGHT-TRANSMITTING LAYERS BEING SO SELECTED THAT WHEN EITHER FACE OF THE COMPOSITE MATERIAL IS VIEWED BY TRANSMITTED LIGHT FROM A SOURCE OF SUBSTANTIALLY WHITE LIGHT THE COLOR OBSERVED IS DIFFERENT FROM THE OBSERVED WHEN ANY LIGHT-TRANSMITTING LAYER ALONE IS VIEWED IN LIKE MANNER.
Claim 3
Dependent Claim
25 words
Sheet material as claimed in claim 1 in which each of the light-transmitting layers has a thickness within the range 0.0001 inch to 0.1 inch.
Claim 4
Dependent Claim
26 words
Sheet material as claimed in claim 2 in which the thickness of at least one light-transmitting layer is within the range 0.0005 inch to 0.05 inch.
Claim 5
Dependent Claim
18 words
Sheet material as claim in claim 1 in which the overall external surfaces thereof comprise continuous light-transmitting layers.
Claim 6
Dependent Claim
29 words
Sheet material as claimed in claim 1 in which at least one light-transmitting layer comprises a layer applied to said partially light-reflecting and partially light-transmitting layer as a coating.
Claim 7
Dependent Claim
19 words
Sheet material as claimed in claim 1 in which at least one of light-transmitting layers is a discontinuous layers.
Claim 8
Dependent Claim
16 words
Sheet material as claimed in claim 6 in which the discontinuous layer is a perforated layer.
Claim 9
Dependent Claim
17 words
Sheet material as claimed in claim 6 in which the discontinuous layer comprises discrete organic polymer areas.
Claim 10
Dependent Claim
59 words
Sheet material as claimed in claim 1 in which all of the light-transmitting layers are discontinous, said layer being so disposed in relation to one another that at least some of the light travelling substantially normal to the colored portions of any one layer travels also substantially normal to at least some portions of at least one other layer.
Claim 11
Dependent Claim
43 words
Sheet material as claimed in claim 1 including three light-transmitting layers, the remotely disposed layers being of the same color and the other layer being of a different color and having partially light-reflecting and partially light-transmitting layers between each pair of light-transmitting layers.
Claim 12
Dependent Claim
22 words
Sheet material as claimed in claim 1 in which said partially light-reflecting and partially light-transmitting layer is formed of a fibrous material.
Claim 13
Dependent Claim
30 words
Sheet material as claimed in claim 1 in which said partially light-reflecting and partially light-transmitting layer is in the form of a calendered material of the paper and fabric type.
Claim 14
Dependent Claim
31 words
Sheet material as claimed in claim 1 in which said partially light-reflecting and partially light-transmitting layer is in the form of a layer of spaced discrete particles of a light-reflecting material.
Claim 15
Dependent Claim
38 words
Sheet material as claimed in claim 1 in which said partially light-reflecting and partially light-transmitting layer is formed of a transparent material having a surface finish which is highly reflectant of light rays which are not normal thereto.
Claim 16
Dependent Claim
39 words
Sheet material as claimed in claim 14 in which the partially light-reflecting and partially light-transmitting layer is in the form Of a transparent film printed on both sides with an ink containing discrete particles of a highly light-refractive pigment.
Claim 17
Dependent Claim
26 words
Sheet material as claimed in claim 1 in which there are adhesive means bonding said partially light-reflecting and partially light-transmitting layer to said adjacent light-transmitting layers.
Claim 18
Dependent Claim
26 words
Sheet material as claimed in claim 1 in which said partially light-reflecting and partially light-transmitting layer is co-extensive with portions only of said adjacent light-transmitting layers.
Claim 19
Dependent Claim
20 words
sheet material as claimed in claim 1 in which portions of said partially light-reflecting and partially light-transmitting layer are transparent.
Claim 20
Dependent Claim
20 words
Sheet material as claimed in claim 1 in which portions of said partially light-reflecting and partially light-transmitting layer are opaque.
Claim 21
Dependent Claim
30 words
A product comprising sheet material as claimed in claim 1 incorporated generally centrally within a paper base material with the sheet material being viewable by light transmitted through said product.
Claim 22
Dependent Claim
34 words
A product as claimed in claim 20 in which said paper base material includes a layer of paper fibres having a minimum layer thickness of 0.005 inch overlying each surface of the sheet material.
Claim 23
Dependent Claim
25 words
A product as claimed in claim 21 in which at least that portion of each layer of paper fibres overlying the sheet material are transparent.
Claim 24
Dependent Claim
14 words
Sheet material as claimed in claim 1 wherein said film-forming materials are thermoplastic resins.
Claim 25
Dependent Claim
14 words
sheet material as claimed in claim 1 wherein said film-forming materials are regenerated cellulose.
Claim 26
Dependent Claim
14 words
Sheet material as claimed in claim 1 wherein said film-forming materials are cellulose esters.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |