FUSER LIFE INDICATOR
Original Publication Date: 1989-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
A fuser or developer unit for use in xerographic apparatus and which has a finite life is fitted with a "useful life left" indicator to indicate to an unskilled operator when the component needs to be replaced by a fresh one. The life indicator is intended to be preset with a number corresponding to the usable life foreseen for that component. When it is position in the machine, the number is decremented in accordance with a parameter related to the wear or use of the component. Thus the number may be decremented in accordance with the number of revolutions of a photoreceptor; number of copy sheets passed through the machine; amount of release agent left in a sump or reservoir; time held above a chosen temperature, or in accordance with wear-related signals from the machine.