JPS63194271A - Process kit - Google Patents

Abstract

PURPOSE:To obtain a small and simple process kit by incorporating one manually openable and closable image carrier light shielding sheet in the process kit. CONSTITUTION:Since a photosensitive drum 1 is degraded when irradiated with the external light for a certain time, the photosensitive drum 1 must be shielded from light in case the drum 1 is left on the outside of a device but the process kit is made large-sized and complicated if plural automatically openable and closable light shielding covers are provided because of a wide light shielding range. Therefore, a light shielding function is realized by one light shielding sheet 18 and a spiral spring 19 for automatic storage. Since one light shielding sheet 18 which can be manually opened and closed as the light shielding means of an image carrier 1 is incorporated in the process kit where the image carrier 1, a cleaning means 7, and an electrifier 3 are constituted as one body and can be attached and detached, the process kit is miniaturized and simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light shielding method for an image carrier of a process kit in which an image carrier, a cleaning means, and a charger are integrally formed.

[Conventional technology]

Conventionally, this cypress light shielding method includes a process kit that includes several image carrier light shielding covers that are automatically opened and closed when the image carrier is attached to and removed from the apparatus.

[Problem that the invention seeks to solve]

In the conventional light shielding method described above, the exposed portion of the image carrier is wide and the light shielding cover becomes large, so 1) the storage space for the cover becomes large and the process kit and the apparatus main body become large.

2) The opening/closing mechanism of the cover becomes complicated.

Furthermore, since a plurality of light-shielding covers are provided, 1) the number of cover opening/closing mechanisms increases;

2) The number of covers increases.

There were other drawbacks.

[Failure to solve the problem]

The present invention eliminates the drawbacks of the conventional method and provides a small and simple process kit by incorporating a single image carrier light-shielding sheet that can be opened and closed manually in the process kit.

〔Example〕

Next, the present invention will be explained using the drawings.

FIG. 1 is a schematic diagram of a printing apparatus according to the present invention. An exposure section 2 , a charger 3 , a developing unit 4 , a sleeve 5 , a transfer device 6 , a cleaning blade 7 , an erase slang 8 , and a toner recovery tank 9 are arranged around the rotation of the photosensitive drum 1 . The surface of the photosensitive drum is charged to e by the charger 3. Thereafter, the exposure section 2 forms a latent image on the surface of the exposure drum. The latent image is developed with toner on the sleeve 5. The paper fed by the paper transport mechanism is charged to the opposite polarity to the toner by the transfer device 6, and the developed image on the photosensitive drum is transferred.

The paper is passed through a fixing device consisting of a heat roller 12 heated by a heater 13 and a pressure roll 14), and then stacked on a system stacker (not shown) by an ejection roller 215° 16 after fixing where the toner is fixed. .

On the other hand, untransferred toner adheres to the surface of the photosensitive drum after the transfer, and the cleaning blade 7 removes the toner from the toner collection tank 9.
Nikaki Rakuto. Thereafter, the residual potential on the surface of the photosensitive drum is reduced by the erase lamp 8 for the next charging.

Figure 2 shows the configuration of the process kit. The process kit includes a photosensitive drum 1, a charger 3, a cleaning blade 7,
Toner collection tank 9, light shielding sheet 18, spiral spring 19
Consists of.

The photosensitive drum deteriorates when exposed to external light for a certain period of time, so if it is left outside the device, it must be shielded from light.

Since the light-shielding range is wide, having multiple light-shielding covers that open and close automatically as in the past has the drawback of making the process kit larger and more complicated.

As shown in FIG. 2, the present invention provides a light shielding function using a single light shielding sheet 18 and a spiral spring 19 for automatic storage, thereby reducing the size and simplifying the handling process. We can provide kits.

〔Effect of the invention〕

As described above, the present invention provides a process kit in which an image bearing member holding means and a charger are integrally configured and detachable, and a single light shielding sheet that can be manually opened and closed is used as a light shielding means for the image bearing member. By incorporating it into the kit, the siprocessing kit can be made smaller and simpler.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a printing apparatus according to the present invention. FIG. 2 is a block diagram of the process kit of the present invention.

Claims (1)

[Claims] In a process kit that integrates and detaches the image carrier, cleaning means, and charger of a printing device using an electrophotographic method, a single light-shielding sheet that can be opened and closed manually is used as a light-shielding means for the image carrier. A process kit characterized by being built into a process kit.