US4006965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection screen
Assignee: Individual
•
Filing: 1974-12-23
•
Granted: 1977-02-08
•
Expires: 1994-12-23
Abstract
Abstract A screen comprises a fabric formed by weaving transparent fiber bundle thereinto and a metallic layer formed on the whole surface of one side of said fabric and having an optically high reflectability.
Inventors
- 👤 Ryosaku Takada
- 👤 Akemi Joma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A screen comprising a woven transparent fabric layer made of clear glass yarn with a transparency more than 90 percent and having a front exposed surface of uniformly and minutely rough textile weave, and a layer of highly reflecting aluminum joined to said transparent fabric layer at a rear surface thereof, said transparent fabric layer having an optically dense structure for providing a highly diffused reflection of light beam projected thereto in combination with said layer of highly reflecting aluminum.
Claim 2
Dependent Claim
80 words
A screen comprising a woven transparent fabric layer made of clear glass yarn with a transparency more than 90 percent and having a front exposed surface of uniformly and minutely rough textile weave, and a layer of highly reflecting aluminum joined to said transparent fabric layer at a rear surface thereof, said transparent fabric layer having an optically dense structure for providing a highly diffused reflection of light beam projected thereto in combination with said layer of highly reflecting aluminum.
Claim 3
Dependent Claim
37 words
The screen of claim 1 wherein said transparent fabric layer has a fabric density of 40-150 pieces each of warp and weft per 25 mm, said numbers of weft and warp being substantially equal to each other.
Claim 4
Dependent Claim
28 words
The screen of claim 2 wherein each of said weft and warp is a twisted glass yarn comprising 100-200 pieces of glass filaments with the diameter of 3-13μ.
Claim 5
Dependent Claim
37 words
The screen of claim 1 wherein said transparent fabric layer has a thickness of about 0.2 mm while said layer of highly reflecting aluminum is an aluminum foil with a thickness of about 0.01 - 0.1 mm.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |