Belt and tread drum
AssigneeVmi Holland B.V.
InventorsRené Dijkstra, Henk-Jan Grolleman
Life of this patent
Estimating the term…
Abstract
The invention relates to a belt and tread drum for manufacturing a package of a belt layer and a tread layer into a cylindrical tire component, wherein the belt and tread drum comprises two support surfaces which are arranged spaced apart in a longitudinal direction of said belt and tread drum and which face away from the drum centre line and are radially movable with respect to the rigid support surface from a retracted position in which the tread support surface is arranged at or near the rigid support surface, to a raised position wherein the tread support surface is arranged in a radially outward position with respect to the rigid support surface, and vice versa, and wherein the tread support surfaces are movable in the substantial longitudinal direction of said drum.
Claims12
A belt and tread drum for manufacturing a package of a belt layer and a tread layer into a cylindrical tire component, wherein the belt and tread drum is rotatable about a drum centre line, and comprises a rigid support surface for the tire component situated at the outward facing circumferential surface of the belt and tread drum,
- wherein the belt and tread drum comprises two support members which are arranged spaced apart in a longitudinal direction of said belt and tread drum,
- wherein the support members each comprises a tread support surface which faces away from the drum centre line and which tread support surfaces are radially movable with respect to the rigid support surface from a retracted position in which the tread support surface is arranged at or near the rigid support surface, to a raised position wherein the tread support surface is arranged in a radially outward position with respect to the rigid support surface, and vice versa,
- wherein the rigid support surface is arranged for receiving the belt layer between the two tread support surfaces,
- wherein the belt and tread drum is arranged for receiving the tread layer around its outward facing circumferential surface on the belt layer with a leading end and a trailing end of the tread layer overlapping at an overlap area, wherein the tread layer is wider than the belt layer and the edges of the tread layer in the longitudinal direction of the belt and tread drum are not supported by the belt layer,
- wherein the belt and tread drum, with the tread support surfaces in the raised position, is arranged for only locally in the circumferential direction of said belt and tread drum supporting the edges of the tread layer at the overlap area at both sides of belt laver,
- wherein the tread support surfaces are movable in the substantial longitudinal direction of said drum.
Dependencies are inferred from the claim text.