US4011665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for providing a semi-permanent luminescent display
Assignee: Individual
•
Filing: 1973-11-02
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Granted: 1977-03-15
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Expires: 1993-11-02
Abstract
Abstract A device is described for providing a semi-permanent luminescent display which includes a first sheet of substantially transparent material provided with a luminescent dye in the form of a fluorescent dye dispersed therethrough. The first sheet of fluorescent material is provided with a smooth major surface which is disposed in opposition to a smooth surface of a second dispersive opaque sheet of material. The two sheets of material are coextensive with one another and one of these sheets is pliable to permit the selective application of pressure on portions thereof to cause the smooth surfaces to come into contact with one another and cause the same to adhere to each other in the regions of these selective portions. Such adherence disperses the light in the fluorescent sheet which impinges at said portions and results in a luminescent effect corresponding to the indicia or pattern impressed. Separation of the sheets from one another terminates the intimate contact at the adhered interface portions between the smooth surfaces and terminates the luminescent impression, pattern or image.
Inventors
- 👤 Lillian Port
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:19
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/12; B43L1/123; B43L1/126; B43L1/004; B43L1/006
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A display device for providing a semi-permanent luminescent display comprising a first sheet of substantially transparent material provided with a fluorescent dye dispersed therethrough and provided with at least one smooth major surface; a dispersive second sheet of material having at least one smooth major surface disposed adjacent to and coextensive with said first sheet to position said respective smooth surfaces of said sheets in opposition to each other, at least one of said sheets being pliable to permit the selective application of pressure on portions thereof to cause said smooth surfaces to come into intimate contact with one another and to cause the same to adhere to each other in the regions of said selected portions to disperse the light which impinges at said portions and to result in a luminescent effect, said sheets being separable from one another to terminate the intimate contact at the interface between said smooth surfaces at the selected portions and terminate the luminescent effect.
Claim 2
Dependent Claim
161 words
A display device for providing a semi-permanent luminescent display comprising a first sheet of substantially transparent material provided with a fluorescent dye dispersed therethrough and provided with at least one smooth major surface; a dispersive second sheet of material having at least one smooth major surface disposed adjacent to and coextensive with said first sheet to position said respective smooth surfaces of said sheets in opposition to each other, at least one of said sheets being pliable to permit the selective application of pressure on portions thereof to cause said smooth surfaces to come into intimate contact with one another and to cause the same to adhere to each other in the regions of said selected portions to disperse the light which impinges at said portions and to result in a luminescent effect, said sheets being separable from one another to terminate the intimate contact at the interface between said smooth surfaces at the selected portions and terminate the luminescent effect.
Claim 3
Dependent Claim
47 words
A display device as defined in claim 1, wherein said first sheet is rigid and said second sheet is pliable, whereby application of pressure on said second sheet with said first sheet functioning as a backing sheet results in a luminescent display when viewing said first sheet.
Claim 4
Dependent Claim
14 words
A display device as defined in claim 1, wherein both said sheets are pliable.
Claim 5
Dependent Claim
19 words
A display device as defined in claim 1, wherein said first sheet is made from an elastomeric plastic material.
Claim 6
Dependent Claim
15 words
A display device as defined in claim 4, wherein said material is a vinyl material.
Claim 7
Dependent Claim
15 words
A display device as defined in claim 4, wherein said material is an acrylic plastic.
Claim 8
Dependent Claim
38 words
A display device as defined in claim 1, wherein at least one of said sheets has a wetting characteristic at this smooth surface thereof which causes the same to adhere to a smooth contacting surface when urged thereagainst.
Claim 9
Dependent Claim
15 words
A display device as defined in claim 1, wherein said second sheet is substantially non-absorbent.
Claim 10
Dependent Claim
14 words
A display device as defined in claim 1, wherein said second sheet is opaque.
Claim 11
Dependent Claim
18 words
A display device as defined in claim 1, wherein said second sheet has a smooth optically dispersive surface.
Claim 12
Dependent Claim
47 words
A display device as defined in claim 1, wherein said first sheet is pliable and said second sheet is rigid, whereby application of pressure on said first sheet with said second sheet functioning as a backing sheet results in a luminescent display when viewing said first sheet.
Claim 13
Dependent Claim
47 words
A display device as defined in claim 1, wherein both said sheets are pliable, and further comprising a rigid backing sheet disposed adjacently to and coextensively with said second sheet, whereby application of pressure on said first sheet results in a luminescent display when viewing the same.
Claim 14
Dependent Claim
28 words
A display device as defined in claim 1, further comprising separating means movable between said two sheets for terminating the adhesion therebetween and the luminescent effect resulting therefrom.
Claim 15
Dependent Claim
48 words
A display device as defined in claim 13, wherein said separating means comprises an elongate strip of rigid material disposed between said sheets and having at least on free end thereof extending beyond the extent of said sheets to make said free end accessible for manipulating said strip.
Claim 16
Dependent Claim
27 words
A display device as defined in claim 1, in combination with a source of black light which emits invisible radiation to which said luminescent dye is responsive.
Claim 17
Dependent Claim
18 words
A display device as defined in claim 15, wherein said source of black light comprises an ultraviolet lamp.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |