Patent ID: 11104090

Abstract:
A method of controlling operation of a tire filling mixing machine, by: (a) mixing a rubber/polyurethane and a catalyst in a first mixer to form a virgin polyurethane; (b) grinding cured polyurethane core bits in a grinder; (c) mixing the virgin material and the ground material in a second mixer thereby forming a mixed flatproofing material; (d) injecting the mixed flatproofing material into a tire; (e) measuring the ratio of ground material to virgin material in the mixed flatproofing material; (f) comparing the measured ratio of ground material to virgin material to a pre-stored preferred ratio of ground material to virgin material; and (g) increasing or decreasing the relative percentages of virgin material and ground material entering the second mixer by an amount that is a fraction of the difference between the measured ratio and the pre-stored preferred ratio.