Single-pass printers usually refer to laser printers, and their working principle can be divided into the following main steps:
Data conversion: Pages, documents and other materials in the computer cannot be directly recognized and used by the printer. They need to be converted into data that the printer can understand. This process is called "print language" or "print command".
Charging and exposure: The laser printer charges the surface of the drum through the charging roller, making it full of static charge. Subsequently, the laser or LED irradiates the surface of the drum to remove unnecessary charges and retain only the required charges to form a charged latent image.
Development: After the latent image is formed on the surface of the drum, the drum contacts the toner cartridge, and the charged part absorbs the toner to form the image to be printed.
Transfer: The printing paper is rolled onto the drum through the rubber wheel. Through the exposure and development steps, the image information on the surface of the photosensitive drum is transferred to the printing paper.
Fixing: The paper with toner adsorbed enters the fixing unit, which heats the paper to a certain temperature, so that the wax or plastic components in the toner melt and fix on the paper to form a firm pattern.
Cooling: After fixing, the paper is cooled naturally through the cooling path or assisted by a fan to ensure that the toner is completely fixed on the paper.
