Patent ID: 8538285

Claim:
A system for fusing a toner on a receiver having a toner pile that extends at least about 50 μm above the receiver, the system comprising: a first energy source to apply a first energy to raise a temperature of a first portion of the toner pile to a range of elevated temperature levels below a glass transition temperature of the toner; and; a second energy source to apply a second energy to raise a temperature of a second portion of the toner pile above the glass transition temperature of a toner and to allow the second portion to transfer energy to the first portion; wherein the second energy is provided at a level that allows the transferred energy to raise the temperature of the first portion from the range of elevated temperature levels to a range of temperatures above the glass transition temperature for the toner, and wherein one of the first energy source and the second energy source is further adapted to fuse toner on a receiver having toner stacks with stack heights that are below about 50 microns during a first exposure period and the other of the first energy source and second energy source can be deactivated during fusing.