Optimization of toner fusing using a computer-controlled hot-roll fusing test system

摘要

A fundamental objective in the development of hot-roll fusing sub-systems in electrophotography is to optimize fusing latitude. A broad fusing latitude, defined by the temperature range between which cold and hot offset occurs, is a criticalfactor in achieving a robust printing process and ensuring the highest print quality. With the recent introduction of a stand-alone, computer-controlled hot-roll fusing test apparatus, developers of toners, toner resins, print media, fuser rollers, fusing sub-systems, and related products now have available to them a highly flexible tool that greatly enhances both objectivity and productivity in optimizing and characterizing the hot-roll fusing process. The system allows the user to control the processspeed, the contact load between the rollers, the temperature range, and the lubrication. In addition to the flexibility it affords in controlling the process variables, the modular design of the system enables the user to change the fuser rollers withease and to control heating of the fusing and pressure rollers independently. System design considerations and a range of practical application examples are discussed.