JP2570995Y2 - Toner filter for copier - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner filter for filtering toner-containing air used in an electrostatic copying machine.

[0002]

2. Description of the Related Art Conventionally proposed toner filters include:
As shown in FIG. 3, the filter has a structure in which a staple 2 having a predetermined fiber diameter is filled in a container-like filter 1 made of a nonwoven fabric. The staple 2 functions as a pre-filter, and the filter 1 functions as a main filter.

At the open end of the filter 1, an end plate 4 having an opening 3 is provided. Such a toner filter is mounted and used in a predetermined case (not shown).

Air containing toner is sucked from the opening 3 of the end plate 4, passes through the staple 2, and is further filtered through the filter 1.

[0005]

The toner filter Disclosed invention is to provide a, first captures toner by Suthep Le 2, then it acts to capture the remaining toner in the filter 1,
The filter media of the staple 2 and the filter 1 are not sufficiently used, and the life is remarkably shortened. That is, when the toner is captured from the upper layer to the lower layer of the staple 2 , the staples are locally compressed, and the upper layer may be clogged first. Then, the flow of air cannot flow toward the lower layer of the staple 2, but flows out from the upper end of the main filter 1, and the upper end of the filter 1 is also clogged. As a result, the life of the filter 1 and the staples 2 reaches their end without being used.

[0006]

A plurality of ribs each having a predetermined width extend outwardly from the periphery of the inflow opening on one surface of an end plate provided with the inflow opening. A main filter is provided, a staple is filled in the main filter, and the staple and the plurality of ribs are provided.
And a plurality of vacant chambers are formed in the air flow direction, and the open end of the main filter is welded to one surface of the end plate.

[0007]

[Action] toner in the air is first Ru captured by staples, air exiting the filtration layer of the staples, the downstream
Multiple voids formed by multiple ribs provided on the entire surface
Into the chamber and over the entire area downstream of the staples
A flow passage is secured, so that air flows evenly into each chamber,
The staple is prevented from being locally compressed. It is then captured by the main filter.

[0008]

1 and 2 show a toner filter according to an embodiment of the present invention. The toner filter comprises an end plate 11 provided with an inflow opening 10, a container-shaped main filter 12, and a plurality of ribs 13.

The end plate 11 is made of a plastic material, and integrally has a rib 13 of the same plastic material on one surface thereof. The rib 13 has a concave shape, and its upper end is fixed to the peripheral edge of the inflow opening 10 of the end plate 11. Further, the rib 13 is fixedly suspended from the peripheral edge of the inflow opening 10 outward over a predetermined width. A container-shaped main filter 12 made of a nonwoven fabric is provided on the outer periphery of the rib 13, and the open end thereof is welded to one surface of the end plate 11.

A staple 14 is filled in the main filter 12. The outer periphery of the staple 14 is the rib 1
Reaches up to 3 of the inner peripheral edge, between the ribs, the air flow direction
A partitioned empty room 15 is formed.

The air flows in from the inflow opening 10 of the end plate 11, flows through the entire surface of the filter layer of the staple 2, enters the empty space 15, then flows through the entire surface of the main filter 12 , is filtered and flows out during this time. .

[0012]

As described above, in the toner filter of the present invention, a plurality of cavities are formed between the main filter and the filter layer of the staple in the direction of air flow by the plurality of ribs. From the downstream side of the staple
An air flow path is provided across the surfaces, and
The air flows through the staples and the staples are compressed locally.
That the filter surface of the pre-filter can be used effectively
In particular, the entire surface of the main filter can be used as an effective filtration surface, thereby preventing shortening of life due to early clogging.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention .

FIG. 2 is a front view of FIG . 1 ;

FIG. 3 is a cross-sectional view of a conventional filter .

[Explanation of symbols]

 10 Inflow opening 13 End plate 14 Rib 15 Vacancy

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of ribs each having a predetermined width extending outward from the periphery of the inflow opening on one surface of an end plate provided with the inflow opening, and a container-like main filter is arranged on the outer periphery of the plurality of ribs. The main filter is filled with staples, and air is supplied between the staples and the plurality of ribs.
A toner filter for a copying machine in which a plurality of empty chambers are formed in a flow direction, and an open end of the main filter is welded to one surface of an end plate.