Patent ID: 8100677

Claim:
A vacuum container for a tyre curing mold; the curing mold being in the form of a hollow cylinder, and comprising two parallel facing top and bottom sidewalls defining top and bottom walls of the curing mold; and a number of lateral sectors arranged successively to define a cylindrical lateral wall of the curing mold, and which are movable radially to and from the two sidewalls; the container comprising: an inclined-surface actuating device, which moves the lateral sectors radially, is activated by a press having a movable plate, and comprises, for each lateral sector, a wedge integral with the lateral sector, and a conical bell fitted in sliding manner to the wedges; an air shut-off plate interposed between the movable plate of the press and the conical bell to transmit motion to the conical bell; and an adjusting ring integral with the air shut-off plate; wherein: the movable plate of the press is provided with a central airtight chamber; the air shut-off plate is integral with the movable plate of the press to transmit motion to the conical bell; the adjusting ring is integral, on one side, with the air shut-off plate and, on the other side, with the conical bell; a static first annular seal is interposed between the conical bell and the adjusting ring; and a static second annular seal is interposed between the air shut-off plate and the movable plate of the press.