Tire building apparatus and method
US4626302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Sep 24, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D30/247
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tire carcass (55) is built on a generally cylindrical drum (10) rotatable about an axis (12) by applying green tire components (50) to the cylindrical surface (14) and curved shoulder surfaces (32,34) of the drum (10). The radially inner surfaces (58) of the lower sidewalls (56) of the tire carcass (55) are formed on the surfaces (32,34) of the curved shoulders (28,30) which have a curvature which can be generated as a segment of a conic section which is at an angle other than a right angle to the axis of a cone. The curvature for each of the lower sidewall inner surfaces (58) as measured along a line of intersection (36) of a shoulder surface (32,34) of the drum (10) and a radial plane (A--A) containing the drum axis (12) is decreased from positions (38) adjacent the axially outer edges (40) of the drum (10) to positions (42) on the cylindrical surface (14 ) of the drum. As a result, there is minimum change in the shape of the lower sidewalls (56) during shaping of the tire carcass (55) to the cured shape of the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.