Tire press and mold leakage control
AssigneeThe Goodyear Tire & Rubber Company
InventorsClarence R. Cole, Robert L. Duncan
Life of this patent
Estimating the term…
Abstract
Apparatus for curing a tire having an internal cavity using as heat and fluid pressure media first steam and then cooler inert gas. The time rate of pressure loss in the cavity is determined in each tire curing cycle by closing the cavity so as to form a completely closed chamber for a test time less than the normal cure time for the tire. Pressure loss during the test time is monitored and if determined to be at a greater than tolerable rate a warning device is actuated and means for loading a next tire into the mold is rendered inactive.
Claims6
In apparatus for curing a tire having a cavity in a curing mold for a predetermined time and including first valve means for controlling admission of fluid medium at a first pressure to said cavity, the improvement comprising in combination second valve means for controlling said fluid medium between said first valve means and a supply of said gas, presettable timing means operable to effect closure of said second valve means for a preset time during and less than said predetermined time, fluid pressure responsive means operable to sense a second pressure less than said first pressure in said cavity, circuit relay means connected to said timing means and to said pressure responsive means and operable to generate a first signal responsive to an occurrence of said second pressure during said preset time, and a second timing means connected to said circuit relay means and energized in response to said first signal to extend said predetermined time.
Dependencies are inferred from the claim text.