WEB TENSION DOUBLE EQUALIZING ROLL

摘要

A rotating sleeve (231) coaxially mounted upon an inner nonrotating pivoting sleeve (230) by at least two rotary bearings (237) on either side of a center mounted pivoting bearing assembly (218) within the nonrotating pivoting sleeve (230) supported by a stationary shaft (212). The nonrotating pivoting sleeve (230) is balance-mounted in the center of the shaft (212) with the pivoting bearing assembly (218). The pivoting bearing assembly (218) permits a selected degree of lateral rotation in a range of from about 1 degree to about 10 degrees. As a web runs over the rotating sleeve (231) any imbalance of lateral tension will cause the nonrotating pivoting sleeve (230) to pivot at its center with respect to the longitudinal axis of the shaft (212) permitting the nonrotating pivoting sleeve (230) and coaxial rotating sleeve (231) to pivot upward on the side of least tension until the web tension is equalized across the coaxial rotating sleeve (231).