System for finishing pipes
US4024006A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Jun 9, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1788
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for finishing conventionally produced clay pipes having plain ends whereby the pipes are successively placed on mandrels which hold the pipes vertically at the bottom thereof on a first urethane table which is indexed successively through a number of stations, for example 60. At one station liquid urethane is poured into a mold formed between the pipe and mandrel to form a urethane collar. The pipes with this collar are successively transferred, to mandrels on one of two identical winding tables which are similarly indexed through a number of stations, for example 20. At a winding station on each winding table strands of fiberglass filaments are helically wound about the lower end of each pipe and the mandrel to form a bell on the pipe end. After curing, the pipes are then removed from the winding tables. Operations of the tables are under the control of a disclosed control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.