Apparatus for preparing tread bands for use in tire retreading
US4111619A · kind A · utility
1Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Apr 21, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D30/52
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sinker unit for preparing an annular unvulcanized tread band comprises an annular mold for supporting the tread band and an expandable annular sinker member for forcing the tread band against the inner surface of the mold. The sinker member includes side walls which are resiliently biassed outwardly so that the sinker member is maintained in a tensioned condition when it is forced against the tread band. The sinker member may be forced against the tread band by means of an expanding air bag underneath the sinker member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.