Claims
- 1. A device for scenting air in a forced air ventilation system, comprising:
- an air permeable foam substrate having a plurality of open interstices for communicating air through the foam substrate;
- said foam substrate having a solidified, flexible residue on at least one surface thereof, said residue being formed from a solution containing liquefied solids and at least one liquid fragrant, said solution having a viscosity of about 5,600 centipoise or less at a temperature of about 250.degree. F. or less, the liquid fragrant and the liquefied solids being present in the solution in a ratio by weight of liquefied solids to liquid fragrant ranging from about 1:4 to 4:1;
- said substrate having a portion of the liquid fragrance from the flexible residue diffused into the interstices; and
- an attacher element for connecting the foam substrate having the solidified, flexible residue thereon and the liquid fragrant diffused therein to a face of an air filter in a forced air ventilation system to scent air flowing through and about the foam substrate.
- 2. The device as recited in claim 1, wherein the liquefied solid comprises a hot melt adhesive.
- 3. The device as recited in claim 2, wherein the hot melt adhesive comprises ethylene vinyl acetate.
- 4. The device as recited in claim 1, wherein the liquified solid is selected from the group consisting of hydroxypropylcellulose, polyvinylpyrrolidone vinyl acetate, and mixtures thereof.
- 5. The device as recited in claim 1, wherein said solution contains a substantially homogeneous mixture of said liquified solids dissolved in a solvent and said liquid fragrant.
- 6. The device as recited in claim 5, wherein said solidified, residue is formed by evaporating at least some of said solvent from said solution.
- 7. The device as recited in claim 5, wherein said liquified solids comprise a polymeric material.
- 8. The device as recited in claim 5, wherein said liquified solids are selected from the group consisting of hydroxypropylcellulose, polyvinylpyrrolidone vinyl acetate, and mixtures thereof.
- 9. The device as recited in claim 5, wherein said liquid fragrant is a fragrant oil.
- 10. The device as recited in claim 5, wherein said solvent comprises ethyl alcohol.
- 11. The device as recited in claim 1, wherein said solution contains a substantially homogeneous mixture of said liquified solids and said liquid fragrant, which forms said solidified, flexible residue upon cooling after being applied to said substrate.
- 12. The device as recited in claim 11, wherein said liquified solids comprises a polymeric material.
- 13. The device as recited in claim 12, wherein said polymeric material is a hot melt adhesive.
- 14. The device as recited in claim 13, wherein said hot melt adhesive comprises ethylene vinyl acetate.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 08/254,939 filed on Jun. 7, 1994 and is a continuation-in-part of our application Ser. No. 08/047,174 filed Apr. 12, 1993, now abandoned, which was a continuation of Ser. No. 07/972,866 filed Nov. 3, 1992, now abandoned, and a continuation of Ser. No. 07/712,974 filed Jun. 10, 1991, now abandoned, and a continuation-in-part of application Ser. No. 07/318,121 filed Mar. 2, 1989, now abandoned.
US Referenced Citations (24)
Continuations (2)
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Number |
Date |
Country |
Parent |
254939 |
Jun 1994 |
|
Parent |
972866 |
Nov 1992 |
|