EP0290267A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Collapsible light pipe
Assignee: 3M Co
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Filing: 1988-05-06
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Granted: —
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Expires: 2008-05-06
Abstract
Abstract A prism light guide luminaire of flexible materials which may be collapsed into a flat state for shipping but easily expanded into a tube for use.
Inventors
- 👤 Lorne A. C/O Minnesota Mining And Whitehead
- 👤 Jonathan E. C/O Minnesota Mining And Scott
- 👤 Malcolm W. C/O Minnesota Mining And Greaves
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
F; F21; F21K; F21K2/00; G; G02; G02B; G02B6/00; G02B6/02; G02B6/032; F21V; F21V17/00; F21V3/00; F21V5/00; F21V5/02; G02B6/0001; G02B6/0096
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A light distribution structure in the form of a tube having an axis and comprising a first and a second side, each of said sides including a flexible transparent film having a structured surface and a smooth surface, said structured surface of each film having a plurality of triangular prisms running parallel to said tube axis and facing the exterior of said tube, characterized in that said tube is capable of being collapsed to a flat state for shipping and expanded into a desired cross-sectional shape for use.
Claim 2
Dependent Claim
88 words
A light distribution structure in the form of a tube having an axis and comprising a first and a second side, each of said sides including a flexible transparent film having a structured surface and a smooth surface, said structured surface of each film having a plurality of triangular prisms running parallel to said tube axis and facing the exterior of said tube, characterized in that said tube is capable of being collapsed to a flat state for shipping and expanded into a desired cross-sectional shape for use.
Claim 3
Dependent Claim
23 words
The light distribution structure of Claim 1 further comprising a light diffusing film adjacent and external to said first side of said tube.
Claim 4
Dependent Claim
21 words
The light distribution structure of Claim 1 further comprising reflective means adjacent and external to said second side of said tube.
Claim 5
Dependent Claim
17 words
The light distribution structure of Claim 3 wherein said reflective means is of a fibrous dielectric material.
Claim 6
Dependent Claim
18 words
The light distribution structure of Claim 4 wherein said reflective means is of a bonded nonwoven polyolfin material.
Claim 7
Dependent Claim
49 words
The light distribution structure of Claim 1 wherein said transparent films each have first and second edges running parallel to said prisms, said first edges being attached to one another by means of an adhesive and said second edges being attached to one another by means of an adhesive.
Claim 8
Dependent Claim
40 words
The light distribution structure of Claim 1 further comprising a first light diffusing film adjacent and external to said first side of said tube and a second light diffusing film adjacent and external to said second side of said tube.
References Cited (Backward Citations)
No citation records indexed.
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