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US 5,858,488 AGranted
Hard-backed lampshade
OwnerRichard Cohoninventor
Life of this patent
Estimating the term…
Abstract
A lampshade includes a self-supporting backing member constituted of an extruded oriented polystyrene and an additive including a light-reflecting powdered filler, especially titanium dioxide, co-extruded with the oriented polystyrene and weighing in the range of 1%-10% of the total weight of the polystyrene. A fire-retarding filler, for example, antimony oxide, is also coextruded.
Claims18
A lampshade for a light source, comprising:
- a) a self-supporting backing member having upper and lower ends spaced apart along a longitudinal axis, and extending circumferentially about said axis to screen light emitted from the light source, said backing member being constituted of an extruded oriented polystyrene having a total weight;
- and
- b) a permanent additive including a light-reflecting powdered filler co-extruded throughout the backing member with the oriented polystyrene and weighing in the range of 1%-10% of said total weight, the backing member reflecting more of the emitted light as the co-extruded filler increases in weight.
A lampshade for a light source, comprising:
- a) a self-supporting backing member having upper and lower ends spaced apart along a longitudinal axis, and extending circumferentially about said axis to screen light emitted from the light source, said backing member being constituted of an extruded oriented polystyrene having a total weight;
- b) a light-transmissive decorative fabric laminated on the backing member;
- and
- c) a permanent additive including a light-reflecting powdered filler co-extruded throughout the backing member with the oriented polystyrene and weighing in the range of 1%-10% of said total weight, the backing member reflecting more of the emitted light as the co-extruded filler increases in weight.
1 more element
Dependencies are inferred from the claim text.