Tank forming mandrel with tank bottom mold
US4225302A · kind A · utility
4Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Mar 19, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7126
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The mandrel includes a generally cylindrical but tapered outer molding surface for forming a sidewall portion of a tank from thermosetting resin and reinforcing material deposited thereon and a tank bottom mold for forming a bottom portion of the tank integrally with the sidewall portion. The tank bottom mold is shiftable to strip a completed tank from the tapered molding surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.