Fuser unit
The fusing unit is a technical component of a laser , color laser printer or a photocopier . It serves the previously from the developer unit or drum applied toner on the paper to fix.
construction
A fusing unit usually consists of three different components: a heating element, encased by the fusing roller, and the pressure roller, which is usually made of silicone or similar. This is pressed against the fuser roller by springs.
functionality
The heating element through which the electric current flows heats the fixing roller to a temperature of around 180 ° C and thus forms the basis for being able to melt the toner. For this purpose, the paper in the fuser unit is pressed by the pressure roller against the fuser roller, whereby the toner melts and thus forms a firm bond with the paper.
Both halogen lamps and ceramic elements are used as heating elements. Both types of heating have advantages and disadvantages. Halogen lamps are cheaper, but have a limited lifespan. Ceramic elements heat up faster to operating temperature and have a longer service life, but are a little more expensive to buy.