Manufacturers that provide high-quality label nameplates OEM services.
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Manufacturers that provide high-quality label nameplates OEM services.
(1) Transfer device: Transfer the "toner image" on the surface of the photosensitive drum to plain paper with high-voltage static electricity. This process is called "transfer". When the positively charged toner moves to the vicinity of the printing paper along with the photosensitive drum, the electrode placed behind the paper is positively charged. Because the voltage is as high as 500～1000V, the electrostatic attraction makes the paper close to the light guide plate. The negatively charged toner is adsorbed on the surface of the paper. Since this transfer method is related to the insulation of the paper, when the paper is damp due to the weather, the toner will not be completely and tightly adsorbed on it due to the leakage of the paper surface, resulting in poor print quality.
There are two transfer methods, one is "corona discharge transfer" (wire electrode), and the other is "discharge rubber roller" transfer. The working principle of the two is the same. Different models have different transfer methods. The early production of laser printers mostly used the corona discharge transfer method. When the photosensitive drum carrying the toner image rotates to a position tangential to the transfer electrode or transfer rubber roller, a piece of printing paper is also fed between the two. At this time, the high voltage applied to the transfer electrode starts Discharge, while pushing the printing paper to the photosensitive drum, the toner image on the photosensitive drum is attracted to the printing paper due to the transfer of the high-voltage electric field on the bottom of the printing paper to complete the secondary transfer of the toner image. The discharge polarity of the transfer electrode wire or transfer rubber roller is the same and negative, but this negative voltage is higher than the negative voltage in the exposed area of the photosensitive drum, so that while pushing the printing paper to the photosensitive drum, it also reduces The toner is attracted to the printing paper as much as possible. However, it should be noted that when the toner is transferred to the print paper, if the print paper is damp and the insulation performance is not good, it will affect the toner transfer efficiency, so there will be problems of image defect and poor print quality of the character hollow chip.
(2) Discharge device: When the toner image is transferred to the printing paper, the printing paper is also charged. In the process of printing paper transportation, because electric field and friction may destroy the structure of the toner image, after the toner image is transferred, a "discharge device" (discharger or discharging tooth) is added, also called "Separate teeth". Its function is to neutralize the charge on the printing paper and the adsorbed toner, eliminate the polarity to make it neutral, and physically adhere to the printing paper, so as to ensure the accuracy of the toner image before fixing. The de-energization process uses AC voltage to achieve the best de-energization and neutralization effect.
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We (Alice) are a manufacturer specializing in the production of nameplates for office appliances. We have 21 years of experience in making furniture signs. We can produce zinc alloy, aluminum alloy, stainless steel, copper, brass, iron, and titanium. , PC, PET, PE, pvc and other different labels.
Contact us E-mail: sales03@alicelogo.com
whatApp: +86 132 6564 6796
Alice has dedicated to precise product since it was established in 1998, especially focus on furniture and electronic appliances field as a tendency.
