Fusing System

New Color QSU-DH (Quick Start Up-Direct Heat) fusing

This is a fusing unit with a heat conduction plate added to the pressure pad on the fusing nip.

The mechanism efficiently heats the paper according to its width by rotating the shield plate, and a heat conduction plate evens out the temperature of the fusing sleeve belt across its width.

The shield moves to one of nine shading positions by adjusting the rotating time according to the paper width. This is done after turning on the main power switch and after starting/finishing printing. The number of the shield plate’s position sensors has changed from 2 to 1.

The heat conduction plate on the nip (on the surface of the pressure pad) disperses the temperature deviation between the front and rear parts of the fusing sleeve belt, so as to even out the temperature.

The fusing sleeve belt is driven by drag rotation following a pressure roller, and presses a nip pad against the pressure roller to fix toner on the paper.

The fusing lamp emits light, and the area of the fusing sleeve belt which is heated moves in an anticlockwise direction so that heat is transmitted up to the contact point with the pressure roller.

Fusing lamps

There are two lamps.

Lamp power:

Nip pad

Presses against the pressure roller to form a fusing nip. The top surface is covered with a slippery sheet.

Reflector

Transmits heat efficiently to the fusing sleeve belt.

Shield

Shield width changes by rotating the shield according to the paper width. Ensures that light from the fusing lamp is not transmitted to the fusing sleeve belt edge (prevents excessive edge temperature rise when printing small size paper).

Flanges

Situated on both ends of the fusing sleeve belt. They maintain the shape of the belt.

Heat conduction plate

Disperses the temperature deviation between the front and rear edges of the fusing sleeve belt to make the temperature uniform.