Method and apparatus for the production of a bead of organic material intended to serve as a seal and insert in a multiple glazing
US4957572A · kind A · utility
8Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Jun 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In order to form a bead of organic material having a butyl rubber base and a viscosity greater than 35000 poises, the material in a drum is heated and pumped by a reciprocating pump and delivered to an output nozzle via a conduit. A lock chamber in the conduit is delimited by valves. A variable volume chamber connected to the lock chamber or upstream of the lock chamber is able to selectively take in or discharge organic material for maintaining a constant pressure at the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.