JPS63239472A - Erasing mechanism - Google Patents

Abstract

PURPOSE:To erase the residual potential on the surface of a photosensitive body uniformly by providing a light reflecting plate which corrects irregularity in the quantity of light in the lengthwise direction of an erasing lamp which erase the residual potential on the surface of the photosensitive body. CONSTITUTION:The light reflecting plate 3 is stuck on parts which are in the flank of a main charger 4 adjoining to an image lamp 2 and correspond to both ends of the erasing lamp 2. Consequently, erasure light 5 from the lamp 2 is reflected by the reflecting plate 3 to illuminate the surface of the photosensitive body 1 and thus the irradiation quantity of the erasure light projected on both ends of the photosensitive body 1 is increased to eliminate the irregularity in the quantity of light. Further, when there is a part where the surface potential is remarkable, the light reflecting plate is stuck on the flank of the incidence part for the erasure part other than said part to obtain similar effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrophotographic printing apparatus, and particularly to an erase mechanism for erasing potential remaining on the surface of a photoreceptor after printing.

[Conventional technology]

Conventionally, this type of erase mechanism erases the residual potential on the surface of the photoreceptor using light emitted from an erase lamp.

[Problem that the invention seeks to solve]

The above-described conventional erase mechanism has the disadvantage that it is not possible to uniformly erase the residual potential on the surface of the photoreceptor after printing due to unevenness in the amount of light in the longitudinal direction of the erase lamp, especially at both ends of the erase lamp where the amount of light decreases.

An object of the present invention is to provide an erase mechanism that uniformly erases residual potential on the surface of a photoreceptor.

[Means for solving problems]

The present invention is an erase mechanism characterized by having an erase lamp that erases potential remaining on the surface of a photoreceptor of an electrophotographic printing device, and a light reflection plate that corrects unevenness in the amount of light in the longitudinal direction of the erase lamp. .

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, the electrophotographic printing apparatus according to the present invention includes a main charger 4 that charges the surface of the photoreceptor 1 around a rotating photoreceptor 1, and a main charger 4 that charges the surface of the photoreceptor 1, and a main charger 4 that irradiates the surface of the photoreceptor 1 with an electrostatic charge. Optical print head 6 that forms a latent image and photoreceptor]
, a developer 7 that attaches toner to the electrostatic latent image formed on the surface of the photoreceptor 1 and develops it into a visible image, a transfer charger 9 that transfers the visible image onto paper, and toner that remains on the surface of the photoreceptor 1 after the printing process. a cleaner 10 that scrapes off toner, and an erase lamp 2 that erases potential remaining on the surface of the photoreceptor 1 by irradiating light.
It is equipped with This printing device rotates the photoreceptor 1,
The steps of charging, exposure, development, transfer, cleaning, and erasing are performed in order to print.

FIG. 2 is a detailed view of one embodiment of the erase mechanism according to the present invention. Due to the characteristics of the erase lamp, there is unevenness in the amount of light in the longitudinal direction of the erase lamp 2, and in particular, the incidence 5 of the erase light on the surface of the photoreceptor at both ends of the erase lamp becomes weak. Therefore, one aspect of the present invention is to use the main charger 4 adjacent to the erase lamp 2.
A light reflecting plate 3 is attached to a side surface of the erase lamp 2 at a portion corresponding to both ends of the erase lamp 2. As a result, the erase light 5 from the erase lamp 2 is reflected by the light reflecting plate 3 and irradiated onto the surface of the photoreceptor 1, increasing the amount of erase light irradiated onto both ends of the photoreceptor 1 and eliminating unevenness in the amount of light.

Further, if there is a part where the surface potential is extremely high due to the characteristics of the photoreceptor, the same effect as above can be obtained by attaching a light reflecting plate to the side surface of the erase light incident part of the other part.

〔Effect of the invention〕

As explained above, the present invention reflects the erase light using a light reflection plate to increase the amount of irradiation on the photoreceptor surface, corrects unevenness in the longitudinal direction of the erase lamp, makes the amount of irradiation uniform on the photoreceptor surface, and after printing, The potential remaining on the surface of the photoreceptor can be uniformly erased, and the surface of the photoreceptor is uniformly charged at the start of printing, which has the effect of improving printing quality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of an embodiment of the present invention, and FIG. 2 is a detailed view of the same. 1... Photoreceptor 2... Erase lamp 3... Light reflecting plate

Claims (1)

[Claims] (1) An erase mechanism characterized by having an erase lamp that erases potential remaining on the surface of a photoreceptor of an electrophotographic printing device, and a light reflection plate that corrects unevenness in light amount in the longitudinal direction of the erase lamp.