JPH02240677A - Printer - Google Patents

Abstract

PURPOSE:To completely clean residual toner, to prevent transfer of the residual toner from being transferred in a next cycle, and to eliminate printing failure by providing an erase charger on a cleaning fleece. CONSTITUTION:After a visible image is formed and transferred, toner (residual toner) 21 which is not completely transferred onto a continuous paper 1 and remains on a photosensitive drum 8 and is moved to a cleaning mechanism. The potential of the photosensitive drum 8 is approximate to 0 V by erase lamps 16 and a discharge corotron 15, and the photosensitive drum 8 and the residual toner 21 are easy to be separated each other by a cleaning brush 17 to perform cleaning. Then, the potential of the photosensitive drum 8 is more approximate to 0 V by the erase lamp 16. The residual toner 21 which has a positive potential is absorped to the cleaning fleece 18 by the erase charger 22 charged negatively. Therefore, the residual toner 21 is transferred on the paper of the next cycle, and a fault such as printing failure can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing device, and particularly to a printing device that uses continuous paper as a printing medium.

[Conventional technology]

Conventionally, in this type of printing apparatus, continuous paper 1 enters a tractor section 3 from a hopper section 2, as shown in FIG. When passing through this tractor section 3, a laser beam 5 generated by a laser generator 4 is applied to a spectrometer 6, and a photosensitive drum 8 charged by a main charger 7 is irradiated with the dispersed laser beam 5.

The toner conveyed by the developing device 9 is placed on the photosensitive drum 8 in the area where the potential has decreased. The toner is placed on the continuous paper 1 by the transfer charger 10 and conveyed to the fixing device 11. The continuous paper 1 and the toner conveyed to the fixing device 11 are fixed by the heater 12 or the flash 13, and the continuous paper 1 is folded and stored in the stacker section 14. On the other hand, after the transfer, the toner remaining on the photosensitive drum 8 enters a cleaning mechanism consisting of a discharge corotron 15° erase lamp 16, a cleaning brush 17, and a cleaning fleece 18, and the top of the photosensitive drum 8 is cleaned. Printing on paper.

[Problem to be solved by the invention]

In the cleaning mechanism of the conventional printing apparatus described above, the photosensitive drum 8
There is a drawback that the toner remaining on the paper cannot be completely cleaned before entering the next cycle, and the remaining toner is transferred onto the paper in the next cycle, resulting in poor printing.

An object of the present invention is to provide a printing device that solves the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a printing device that uses continuous paper as a printing medium, which has an erase charge on a cleaning fleece for wiping off residual toner on a photosensitive drum, which causes the residual toner to be adsorbed to the cleaning fleece by a charge. It is.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a conceptual diagram mainly showing an electrophotographic process section for explaining an embodiment of the present invention.

A laser beam 5 is applied to the photosensitive drum 8 charged by the main charger 7 to form a latent image, and the positively charged toner 20 in the developing device 9 is developed on the formed latent image. The developed toner 20 is placed on the continuous paper 1 by a transfer charger lO installed in the tractor section 3. Formation of visible images.

After transfer, the toner remaining on the continuous paper (
Residual toner) 21 is present on the photosensitive drum 8, and the process moves to the cleaning mechanism. The erase lamp 16 and the discharge corotron 15 reduce the potential on the photosensitive drum 8 to Ov.
Then, the cleaning brush 17 is used to easily separate the photosensitive drum 8 and the residual toner 21, and cleaning is performed. Next, the erase lamp 16 is used to further bring the photosensitive drum 8 to the vicinity of Ov, and the erase charger 22 charged with negative voltage is used to , the residual toner 21 having a positive potential is adsorbed onto the cleaning fleece 18.

That is, in the printing apparatus of the present invention, an erase charger 22 is installed on the cleaning fleece 18 that wipes off the residual toner 2I on the photosensitive drum 8, and the erase charger 22 charges the cleaning fleece 18 with a negative potential, and then charges the cleaning fleece 18 with a positive potential. The remaining toner 21 is adsorbed onto the fleece 18.

〔Effect of the invention〕

As explained above, the present invention includes an erase charger in the cleaning fleece. This has the effect of completely cleaning the residual toner, preventing transfer of the residual toner in the first cycle, and eliminating printing defects.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram mainly based on an electrophotographic process for explaining an embodiment of the present invention, and FIG. 2 is a conceptual diagram for explaining an embodiment of the prior art. 1...Continuous paper 2...Part of hopper 3
... Tractor part 4 ... Laser generator 5
...Laser light 6...Spectrometer 7...
Main charger 8...Photosensitive drum 9...Developer lO...Transfer charger 11.
...Fuser 12...Heater 13...
・Flash 14...stacker part 15・
・Discharge Corotron

Claims (1)

[Claims] (1) A printing device that uses continuous paper as a printing medium, characterized in that a cleaning fleece that wipes residual toner on a photosensitive drum has an erase charge that adsorbs the residual toner to the cleaning fleece with a charge.