TRACKING DEVICE FOR A BELT FUSER APPARATUS USED FOR FIXING TONER IMAGES
Original Publication Date: 1988-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The belt tracking device disclosed is utilized in a belt fuser used for fixing toner images to copy substrates. The fuser, in addition to the belt, comprises a heat tube and a stationary mandrel, the belt being entrained about the heat tube and mandrel. The belt is sandwiched between a pressure roll and the stationary mandrel to thereby form a nip through which copy substrates are passed with the toner images carried thereby contacting the heated belt. A first pair of capacitor plates is attached to each side of the belt and a second pair of capacitor plates is attached to each end of the stationary mandrel. This arrangement forms a non-inhibiting sandwich. Utilizing two plates at each end will ensure a lower susceptibility to noise and a high signal to be obtained for small belt movements.