JPH07168428A - Sealing material for closing toner discharge port - Google Patents

Abstract

PURPOSE:To obtain a sealing material for closing a toner discharge port whose rupture strength is improved and which is prevented from being broken or elongated by adding a strength layer using a substance obtained by knitting fibrous matter in grid shape or sheet-like matter made of resin or metal. CONSTITUTION:The sealing material 10 is constituted by superposing a heat resistant layer 1, the 1st strength layer 5, the 2nd strength layer 2 made of nylon, a heat resistant layer 3 and a welding layer 4 in order. The welding layer # is welded on a toner discharge port. The 1st layer 5 is obtained by knitting the fibrous substance, chemical fiber, metallic fiber and the like in the lattice state. By providing the 1st layer 5, the sealing material is prevented from being broken halfway or being elongated even when the sealing material 10 is peeled. It is conceivable to use the sheet-like substance made of the resin or the metal as the 1st layer 5. By making the strength layer 5 in two-layer structure, the strength of the sealing material is improved and the sealing material is prevented from being broken and elongated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material for closing a toner discharge port of a toner cartridge of a printing device using toner.

[0002]

2. Description of the Related Art Conventionally, a toner discharge port of a toner cartridge used in an electrophotographic apparatus is covered with a sealing material shown in FIG. In FIG. 4, the sealing material that closes the toner outlet is composed of a heat resistant layer 1, a nylon strength layer 2, a heat resistant layer 3 and a welding layer 4, and the welding layer 4 is stretched over the toner outlet.

[0003]

In the conventional sealing material,
If the welding is performed strongly, breakage or elongation occurs when peeling off. For this reason, there has been a problem that it is difficult to peel off the seal material, or the seal material is cut off on the way and cannot be completely peeled off.

It is an object of the present invention to provide a sealing material for blocking a toner discharge port, in which breaking strength is improved and breakage or elongation is prevented by adding a strength layer.

[0005]

The sealing material of the present invention includes at least two strength layers and is made of chemical fibers, metal fibers, or other fibrous materials woven in a lattice pattern, or
The above object is achieved by using a sheet-like material made of resin or metal for the strength layer on the one hand.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of a toner cartridge using a sealing material of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a sealing material of an embodiment of the present invention. FIG.

In FIG. 1 and FIG. 2, the toner cartridge main body 6 is divided by a partition wall 20 into a toner chamber 11 in which toner 9 is stored and a developing chamber 12 supporting the developing roller 8 and the supply roller 7. The sealing material 10 is attached to the toner discharge port 21 of the partition wall 20.

When the sealing material 10 is pulled off from the outside, the toner 9 drops from the toner discharge port 21 into the developing chamber 12, and the toner is developed by the rotation of the supply roller 7.
On the surface of.

As shown in FIG. 3, the sealing material 10 comprises a heat resistant layer 1, a first strength layer 5, and a second strength layer 2 of nylon.
The heat-resistant layer 3 and the welding layer 4 are sequentially stacked. The welding layer 4 is welded to the toner discharge port 21.
The first strength layer 5 is formed by weaving chemical fibers, metal fibers, and other fibrous materials in a lattice pattern.

By providing the first strength layer, even if the sealing material is peeled off, the sealing material does not break or extend completely.

The first strength layer 5 may be a sheet made of resin or metal.

[0013]

As described above, according to the present invention, since the strength layer has a two-layer structure, the strength of the sealing material can be improved and breakage and elongation can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of a toner cartridge that uses a sealing material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the toner cartridge of FIG.

FIG. 3 is a cross-sectional view showing a sealing material according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a conventional sealing material.

[Explanation of symbols]

 1 heat-resistant layer 2 strength layer 3 heat-resistant layer 4 welding layer 5 strength layer 6 toner cartridge body

Claims (4)

[Claims] 1. A sealing material for closing a toner discharge port of a printing device using toner, the sealing material including at least two strength layers. 2. The sealing material according to claim 1, wherein at least one layer of the strength layer is formed by knitting a chemical fiber having a workable wire diameter in a lattice pattern. 3. The sealing material according to claim 1, wherein at least one layer of the strength layer is formed by braiding metal fibers having a workable wire diameter in a lattice pattern. 4. The sealing material according to claim 1, wherein at least one of the strength layers is a sheet material having a workable plate thickness.