Method of making a weather strip
US4740256A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Aug 14, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1741
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for making weather strips in which a polyurethane film is positioned along an anvil having longitudinal parallel spaced anvil surfaces and recesses therebetween with elongate channel-like portions of the film in the recesses. Resiliently compressible polyurethane foam is pressed against the polyurethane film along the anvil so that the foam is compressed against the anvil surfaces and extends into the channel-like portions of the film in the recesses. The compressed foam and film along the spaced anvil surfaces are then sonically welded to fuse the foam together in its compressed state and fuse the compressed foam to the film, and the fused foam and film are slit along the anvil surfaces to form separate weather strips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.