Sound absorbing article and method of making same
US5796055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1997 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jan 13, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B17/10788
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sound dampening glazing, for example an automotive windshield, in one embodiment includes a pair of glass sheets. In cross section and moving from one glass sheet to the other there is an interlayer e.g. polyvinyl butyral, an intermediate sheet e.g. a polyester sheet having a surface harder than the surface of the interlayer to smooth the interlayer surface, a sheet of dampening material, an intermediate sheet, an interlayer and the other glass sheet. In another embodiment, the glazing has two sheets of dampening material each having different sound dampening temperature range to provide the glazing with sound dampening properties over a broader temperature range. A method for making the glazing is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.