Device for dispensing of volatile substance and method for making the device
US4529124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1980 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Oct 2, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2451/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved device for dispensing a volatile substance into the environment includes a reservoir layer, having opposing first and second surfaces, for holding the substance and first and second envelope layers respectively in close proximity to the first surface and the second surface of the reservoir layer. At least a portion of at least one envelope layer is permeable to the substance. The reservoir layer and envelope layers are fused together at a first generally circular, continuous boundary at which the reservoir layer is nonpermeable to the substance to thereby define a generally circular region within which the substance is confined. The reservoir layer and envelope layers are further fused together at a second non-circular boundary completely enclosing the first boundary and the region to thereby define an outer, decorative, peripheral shape of the device. The device may also include an outer decorative layer in close proximity to at least one of the envelope layers and fused thereto at the second boundary but not at the first whereby the decorative layer has a smooth generally planar outer surface. The decorative layer may carry indicia which is resistant to deterioration …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.