Tire building drum
US4131500A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Aug 3, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D2030/3264
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention is a tire building drum for building the stage - I carcass of a tire corresponding to the initial part of the carcass before breaker belts and the tread are subsequentially applied. The invention is in a drum and a method of using it whereby the components for making the stage - I carcass can be expanded substantially radially say between 25% and 35% of the drum radius to ensure that the side wall components extend generally in planes perpendicular to the drum axis during crowning and includes fillers fitted to or attached to the beads which can be substantially undistorted in those planes and will be similarly substantially undistorted in use at the vital area where a tire is in contact with the wheel rim.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.