JPS6012129Y2 - Toner scattering prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toner scattering prevention device for a developing device and a cleaning device in a dry type copying machine.

Generally, in magnetic brush developing devices or cleaning devices using blades, brushes, etc., film seals are provided at the openings of these devices to prevent toner from scattering, as shown in Figure 1. The film 1 is brought into contact with the surface of the drum 5.

However, in this case, if the film thickness is large, there are problems such as damaging the drum or scraping off toner adhering to the drum surface to generate a toner cloud.

Furthermore, if the film thickness is small, the film absorbs moisture at high humidity and causes a wavy phenomenon, creating a gap between the film and the drum surface, resulting in problems such as insufficient sealing of the toner.

The present invention was developed in view of the above circumstances, and in order to prevent drum scratches and toner scraping, a thin film (2 to 5
The purpose of this is to prevent the wave peg phenomenon at times of high humidity when using 0μ).

This invention will be explained below by way of examples with reference to the accompanying drawings.

FIG. 2 is a diagram showing an embodiment of the present invention, in which the holding member 2
The film 1 is pasted at several locations 3 at predetermined intervals.

Furthermore, when attaching the film 1, there is a notch 4 between the parts 3.
This cut 4 extends from the end of the film 1 and stops on the holding member 2.

By attaching the film to the holding member at several places in this way, even if the film absorbs moisture and stretches, the film is attached to the holding member and absorbs this elongation between the parts, so the film does not come into contact with the drum. The wave nail phenomenon does not occur in this area.

Furthermore, the notch provided between the attachment parts has the effect of absorbing the elongation of the film even more effectively.

Here, since the notch in the film is provided only on the holding member, toner does not fall out from the notch.

[Brief explanation of the drawing]

FIG. 1 shows an outline of a general device provided with a toner scattering prevention film, and FIG. 2 shows an embodiment of the toner scattering prevention device of the present invention. Codes in the figure: 1...Film, 2...Film holding member, 3...Film pasting part, 4
・・・・・・Notch, 5・・・ Recording drum.

Claims (1)

[Scope of utility model registration request] A device that prevents toner from scattering by bringing the film into contact with a drum, characterized in that the film is pasted on the film holding member at several locations at predetermined intervals, and a cut is provided between the parts for pasting the film. A toner scattering prevention device.