JPH067815U - Toner filter for copier - Google Patents

Abstract

(57) [Abstract] [Purpose] In a toner filter for filtering air containing toner, when the filter is attached to the case, the toner flows out to the clean side from the gap formed between the end plate of the filter and the case. Provide a filter that prevents [Constitution] Container-shaped main filter 11 made of non-woven fabric
The end plate 12 having the inflow opening 14 is welded to the open end of the
A plurality of openings 15 communicating with the inside of the main filter 11 are provided on the outer circumference of the inflow opening 14. When the end plate 12 is used by being brought into contact with the contact surface of the case and a gap is formed between the two, air containing toner flows through the gap, but the toner contained is discharged from the opening 15 to the main filter 11. Will be introduced in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present application relates to a toner filter for filtering toner-containing air used in an electrostatic copying machine.

[0002]

[Prior art]

 As shown in FIG. 2, a conventionally proposed toner filter has a structure in which a container-shaped filter 1 made of a non-woven fabric is filled with staples 2 having a predetermined fiber diameter. The staple 2 functions as a pre-filter, and the filter 1 functions as a main filter.

An end plate 4 having an opening 3 is provided at the open end of the filter 1. Such a toner filter is assembled as shown in FIG. 3 and used. That is, the end plate 4 of the filter 1 is brought into contact with the contact wall 8 of the case 7 provided with the inlet / outlet pipes 5 and 6, and is supported by the plurality of holders 9.

When the outlet pipe 6 of the case 7 is sucked, air containing toner flows in from the inlet pipe 5, enters the staple 2 through the opening 3 of the end plate 4, and further flows through the filter 1 to be filtered. To be done.

[0005]

[Problems to be solved by the device]

 Since the end plate 4 and the contact wall 8 are integrated with each other in the toner filter in the case 7, when the outlet pipe 6 is sucked, the toner filter is inserted between the end plate 4 and the contact wall 8. Gaps may be formed. Then, a part of the air for final purification flowing from the inlet pipe 5 flows out to the outer peripheral side of the filter 1 through the gap as shown by the arrow in FIG. As a result, the toner is mixed in the clean air.

[0006]

Means for Solving the Problems A toner filter for a copying machine, which is formed by forming a staple layer in a container-shaped main filter made of non-woven fabric and having an open end, and welding an end plate having an inflow opening at the open end. Here, a plurality of openings communicating with the inside of the main filter are provided around the inflow opening of the end plate.

[0007]

[Action]

 When the end plate of the toner filter is used in contact with the case, a gap may be formed between the end plate and the case. Toner is introduced into the main filter through the opening.

[0008]

【Example】

 FIG. 1 shows a toner filter 10 according to an embodiment of the present invention, which comprises a container-shaped main filter 11 and an end plate 12. The main filter 11 has a container shape with an open upper end and a closed lower end, and is made of a non-woven fabric. The inside of the main filter 11 is filled with staples having a predetermined fiber diameter, which forms a staple layer 13.

The end plate 12 is made of a plastic material, and a rectangular inflow opening 14 is provided in the center thereof, and a plurality of openings 15 are provided on the outer periphery thereof. In the embodiment shown in FIG. 1, four rectangular openings 15 are formed.

The open end of the main filter 11 is welded to and integrated with one surface of the end plate 12. The place to be welded must be on the outer peripheral side of the opening 15 on one surface of the end plate 12. That is, the opening 15 needs to communicate with the inside of the main filter 11.

The toner filter 10 is used by being arranged in a case, like the one shown in FIG. When the outlet pipe 6 is sucked while the toner filter 10 is attached as shown in FIG. 3, air containing toner is introduced from the inlet pipe 5. The air passes through the inflow opening 14 of the end plate 12 and flows through the staple layer 13 and the main filter 11, and is filtered in the meantime. A gap may be formed between the end plate 12 and the case. In that case, a part of the air flows as shown by the arrow in FIG. However, when the air flowing through the gap reaches the opening 15, it is sucked downward and introduces the contained toner into the staple layer 13 in the main filter 11.

[0012]

[Effect of device]

 As described above, the toner filter of the present invention has high filtration efficiency because it prevents toner from flowing to the clean side as much as possible even when the toner filter is attached to the case and a gap is formed on the attachment surface. Become.

[Brief description of drawings]

FIG. 1 is a perspective view of a toner filter of the present invention, FIG. 2 is a perspective view of a conventional toner filter, FIG. 3 is a sectional view showing a mounting state of the toner filter, and FIG. 4 is a toner filter of the present invention. FIG. 5 is a partially enlarged view of the state where the toner cartridge is attached to the case, and FIG. 5 is a partially enlarged view of the state where the conventional toner filter is attached to the case.

[Explanation of symbols]

 10 Toner Filter 11 Main Filter 12 End Plate 13 Staple Layer 14 Inflow Opening 15 Opening

Claims (1)

[Scope of utility model registration request] 1. A toner filter for a copying machine, wherein a staple layer is formed in a container-shaped main filter made of non-woven fabric and having an open end, and an end plate having an inflow opening at the open end is welded. A toner filter for a copying machine, characterized in that a plurality of openings communicating with the inside of a main filter are provided on the outer circumference of the openings.