LIGHT DIRECTING EXPANDABLE ENVELOPE
First Claim
Patent Images
1. An expandable envelope comprising a film that forms an external surface of the envelope, wherein at least a portion of the film is a light directing film.
1 Assignment
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Accused Products
Abstract
Disclosed is an expandable envelope that comprises a light directing film this both transmits and reflects light. In its inflated form and along with a light source, the envelope forms a light balloon that due to the light directing film provides directed light to an area surrounding the balloon.
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Citations
20 Claims
- 1. An expandable envelope comprising a film that forms an external surface of the envelope, wherein at least a portion of the film is a light directing film.
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20. An expandable envelope comprising:
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a film that forms an external surface of the envelope, wherein at least a portion of the film is a light directing film that transmits at least 20% and reflects at least 20% of a lambertian light and at least a portion of the film is a reflective film; a light source for introducing light into the envelope.
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Specification