US4025674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex light reflecting sheet
Assignee: Seibu Polymer Kasei KK
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Filing: 1975-09-12
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Granted: 1977-05-24
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Expires: 1995-09-12
Abstract
Abstract A reflex light reflecting sheet or reflective structure whereby incident light is reflected from a reflective layer on the rear of the structure through a plurality of small transparent balls, wherein a surface coating layer which is transparent and flat is formed over the surfaces of said balls, said layer being composed of two sub-layers between which is provided a printed portion using fine lines for printing, such that the printed portion is visible in scattered light in the daytime but invisible in reflected light in the nighttime.
Inventors
- 👤 Hisayuki Mizuochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:51
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/02; B32B3/08; B32B3/085; G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; G02B5/128; B32B27/00; B32B27/30; B32B27/308; G09; G09F; G09F13/00; G09F13/16; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/40; B32B2307/416; B32B2551/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24926; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A laminated reflex light reflecting sheet comprising in succession: a flat, transparent surface coating layer, a transparent binder layer at the rear of the coating layer, a plurality of small transparent balls partially embedded in said transparent binder layer, a transparent spacing layer covering the remaining portions of said balls, and a reflective layer at the rear of said spacing layer, said surface coating layer containing printing which is visible from the front of said surface coating layer in scattered daytime light, but substantially invisible in reflex reflected light at night, said printing consisting of lines less than 0.5 mm in size and having a transmittance at least 50% as great as the transmittance of said transparent layers.
Claim 2
Dependent Claim
118 words
A laminated reflex light reflecting sheet comprising in succession: a flat, transparent surface coating layer, a transparent binder layer at the rear of the coating layer, a plurality of small transparent balls partially embedded in said transparent binder layer, a transparent spacing layer covering the remaining portions of said balls, and a reflective layer at the rear of said spacing layer, said surface coating layer containing printing which is visible from the front of said surface coating layer in scattered daytime light, but substantially invisible in reflex reflected light at night, said printing consisting of lines less than 0.5 mm in size and having a transmittance at least 50% as great as the transmittance of said transparent layers.
Claim 3
Dependent Claim
30 words
The reflex light reflecting sheet set forth in claim 1, wherein said surface coating layer is composed of two sublayers and said printed portion is provided between said two sub-layers.
Claim 4
Dependent Claim
30 words
The reflex light reflecting sheet claimed in claim 2, wherein the two sub-layers constituting said surface coating layer are formed from transparent thermosetting resin having a refractive index of 1.52.
Claim 5
Dependent Claim
26 words
The reflex light reflecting sheet set forth in claim 1, wherein said printing is made of transparent or semitransparent ink having a refractive index of 1.52.
Claim 6
Dependent Claim
25 words
The reflex light reflecting sheet claimed in claim 2, wherein said printing is photogravured on one of the two sub-layers constituting said surface coating layer.
Claim 7
Dependent Claim
26 words
The reflex light reflecting sheet set forth in claim 1, wherein transmittance of said printing is 70 to 100% of the transmittance of the other layers.
Claim 8
Dependent Claim
32 words
The reflex light reflecting sheet claimed in claim 2, wherein a printing ink and pigment are used in said printing and have particle sizes ranging from less than 1μ to about 40μ.
Claim 9
Dependent Claim
23 words
The reflex light reflecting sheet claimed in claim 2, wherein the two sub-layers constituting said surface coating layer are formed from thermosetting resin.
Claim 10
Dependent Claim
25 words
The reflex light reflecting sheet claimed in claim 2, wherein the two sub-layers constituting said surface coating layer are different from each other in thickness.
Claim 11
Dependent Claim
26 words
The reflex light reflecting sheet set forth in claim 1, wherein said reflective layer is curved in conformity with the shape of said small transparent ball.
References Cited (Backward Citations)
US2827720A
Cited
US3247005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |