Vapor Emitting Device
The invention is generally directed to a vapor emitting device having a container, at least one liquid in the container, and a wick. The container has an interior in which the at least one liquid is disposed. The wick has a distal portion disposed in the container interior and a proximal portion. The wick is configured and positioned so as to maintain contact with the at least one liquid and allows the wick to draw the at least one liquid into and through the distal portion toward the proximal portion, thereby making the at least one liquid available for evaporation when the proximal portion is exposed to air. A change in a visible characteristic of the wick occurs upon exhaustion of the at least one liquid from the wick.
1 . A vapor emitting device comprising:
a container having a container interior;
a first liquid disposed in the container interior; and
a wick having a distal wick portion disposed in the container interior and a proximal wick portion, the wick being configured and positioned so as to maintain contact with the first liquid and to draw the first liquid into and through the distal wick portion toward the proximal wick portion, thereby making the first liquid available for evaporation when the proximal wick portion is exposed to air, the wick being further configured so that a change in a visible characteristic of the wick occurs upon exhaustion of the first liquid from the wick.
2 . The vapor emitting device of claim 1 , further comprising:
a second liquid disposed in the container interior; and
wherein the wick is configured and positioned so as to maintain contact with both the first liquid and the second liquid.
3 . The vapor emitting device of claim 2 , wherein the first liquid and second liquid are immiscible.
4 . The vapor emitting device of claim 3 , wherein the first liquid is organic based and the second liquid is aqueous based.
5 . The vapor emitting device of claim 2 , wherein the wick draws the first liquid into and through the distal wick portion toward the proximal wick portion and then draws the second liquid into and through the distal wick portion toward the proximal wick portion, thereby causing the change in the visible characteristic of the wick.
6 . The vapor emitting device of claim 5 , wherein the change in the visible characteristic of the wick is a color change.
7 . The vapor emitting device of claim 2 , wherein the wick draws the second liquid into and through the distal wick portion toward the proximal wick portion and then draws the first liquid into and through the distal wick portion toward the proximal wick portion, thereby causing the change in the visible characteristic of the wick.
8 . The vapor emitting device of claim 7 , wherein the change in the visible characteristic of the wick is a color change.
9 . The vapor emitting device of claim 1 , wherein the wick comprises any material which will absorb the target material.
10 . The vapor emitting device of claim 1 , wherein the wick comprises fibers.
11 . The vapor emitting device of claim 10 , wherein the fibers comprises a material selected from the group consisting of polyethylene (and copolymers thereof), polypropylene (and copolymers thereof), nylon-6, nylon-6,6, nylon 12, semicrystalline polyamides (and copolymers thereof), semicrystalline polyesters, including polybutylene terephthalate and polyethylene terephthalate and cellulose acetate fibers.
12 . The vapor emitting device of claim 10 , wherein the fibers are monocomponent fibers.
13 . The vapor emitting device of claim 10 , wherein the fibers are bicomponent fibers.
14 . The vapor emitting device of claim 1 , wherein the wick comprises a plurality of fiber types.
15 . The vapor emitting device of claim 10 , wherein at least a portion of the fibers have a surface material that comprises hydrophilic material.
16 . The vapor emitting device of claim 10 , wherein at least a portion of the fibers have a surface material that comprises 1-19% hydrophilic nylon.
17 . The vapor emitting device of claim 10 , wherein at least a portion of the fibers are sheath/core bicomponent fibers, wherein the sheath is a blend of nylon-6 and hydrophilic nylon, and the core is a material selected from the group consisting of a polyolefin, a polyester, a polyamide, or a semicrystalline thermoplastic.
18 . The vapor emitting device of claim 1 , wherein the first liquid has a specific pH, the wick is pH sensitive, and the change in the visible characteristic of the wick occurs upon exhaustion of the first liquid from the wick.
19 . The vapor emitting device of claim 18 , wherein the change in the visible characteristic of the wick is a color change.
20 . The vapor emitting device of claim 1 , wherein the first liquid has a specific pH, the first liquid further comprising a pH sensitive dye, and the change in the visible characteristic of the wick occurs upon exhaustion of the first liquid from the wick.
21 . The vapor emitting device of claim 18 , wherein the fibers of the wick comprises a pH sensitive dye and the first liquid has a specific pH.
22 . The vapor emitting device of claim 1 , wherein the wick is a three-dimensional, self-sustaining bonded fiber structure comprising a plurality of polymeric fibers bonded to each other at spaced apart contact points.
23 . The vapor emitting device of claim 1 , wherein the wick is an multi-component structure comprising a plurality of components, at least one of which is a three-dimensional, self-sustaining bonded fiber structure comprising a plurality of polymeric fibers bonded to each other at spaced apart contact points.
24 . The vapor emitting device of claim 1 , wherein the vapor is emitted is selected from the group consisting of air fresheners, insecticide emitters, insect repellant emitters, humidifier wicks, odor removal compounds, and other functional liquid-to-vapor distribution devices.