2. Product Specifications and Description2.6. Fuser unitThis section describes the image fusing process used by the machine.2.6.1. Fuser unit overviewThis unit fuses the toner that was transferred by the transfer roller onto the paper, by applying heat and pressure to completethe fusing process. This machine uses an instant fusing system. This has a faster warm-up time than a conventionalfusing and pressure roller system.1) Halogen LampThe fuser unit has two halogen lamps. One heats the center of the fusing belt, the other heats the end of axial direction.These halogen lamps are lit alternately to heat the fusing belt. Each lamp has its coil in a different location. The coil ofthe center heater lamp is in the center, those of the side heater lamp are on both sides. The lamp s are fixed inside ofthe fusing belt. When rotating the fusing belt, these lamps does not rotate.2) Fusing BeltThe fusing belt gets heat from the halogen lamp and transfer it to toner and paper. The fusing belt consists of threethin-layers. The thin fusing belt reduces warming up time and mode changing time. To prevent the fusing belt fromadhering to the toner, the surface of the fuser belt is fluorinated. There is a Nip inside the fusing belt. To maintain theproper Nip between the fusing belt and pressure roller, the spring is used.3) Pressure RollerThe pressure roller is a rubber roller which ensures proper nip width between the pressure roller and fusing belt. It isdriven by the driving system and drives the fusing belt.4) Non-Contact(NC) SensorNC sensors (non-contact type thermistors), located near the center and the end of the fusing belt, control the temperatureof the fusing belt.Copyright© 1995-2013 SAMSUNG. All rights reserved. 2-45
