Method for the manufacture of a pipe
US4256523A · kind A · utility
3Cited by
19References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1978 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Oct 27, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2009/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to a method of manufacturing a pipe having a rubber lining within a layer of looped fabric and a resin layer. The method comprises placing a tubular layer of unvulcanized rubber on an expansible mandrel, then wrapping a layer of looped fabric on the rubber layer, with the loops outwardly directed. The mandrel is expanded to draw the looped fabric partially into the rubber, the protruding loops then being impregnated with uncured thermosetting resin, and glass fabric is then wrapped on the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.