Processing box

Abstract

The invention provides a processing box comprising a shell, wherein the shell comprises a carbon powder cavity for accommodating carbon powder; a sensitive drum, a charging roller, a developing roller and a power discharging knife are arranged in the shell, wherein the charging roller is used for supplying power to the sensitive drum, the developing roller is used for transmitting the carbon powder to the sensitive drum, the power discharging knife is used for regulating the thickness of a carbon powder layer on the developing roller, one end of the charging roller is connected with an electric conduction piece, and a voltage reduction device is connected between the electric conduction piece and the power discharging knife. The suitable voltage reduction device can be selected in the invention according to the characteristics of the carbon powder loaded by the processing box and the developing roller so as to ensure that the carbon powder adsorbed on the developing roller to carry suitable developing roller, thereby reducing printing quality problems and avoiding the waste of the carbon powder.

Description

technical field [0001] The invention relates to a printing consumable, especially a processing box for a laser printer. Background technique [0002] Laser printers are common printing devices that provide great convenience for modern offices. Existing laser printers mostly use a process box detachably installed in the laser printer to provide toner for printing. During the printing process, the toner loaded in the process box is transferred on the paper as the printing medium to form the pattern and text. [0003] An existing type of processing box is an integrated box, which has a toner cavity for accommodating carbon powder and a waste toner cavity for accommodating waste toner. The structure of this type of processing box is as follows: figure 1 shown. [0004] see figure 1 , The process box has a shell 1, and the shell 1 is provided with a handle 15, which is convenient for the user to grasp. see figure 2 , The shell 1 of the process cartridge is composed of a dr...

AI Technical Summary

Problems solved by technology

[0018] However, the voltage value loaded by the laser printer on the powder knife is fixed, which often leads to the voltage loaded on the powder knife being too low, resulting in insufficient electric field force of the toner in the electric field, or being unable to neutralize the positively charged polar toner.

If the electric field force of the carbon powder in the electric field is insufficient, the carbon powder cannot be transferred to the surface of the photosensitive drum 36, but falls from the developing roller 25, so that redundant gray spots are formed on the paper, and the printed text or pattern blackness is caused. Not enough, it also causes waste of toner

If the positively charged polar carbon powder cannot be eliminated or neutralized, the positive polar carbon powder is adsorbed on the unexposed area of ​​the photosensitive drum 36, resulting in the formation of gray spots in areas where text or patterns should not be formed, affecting the printing quality

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