JPH0772723A - Developer supplying container - Google Patents

Abstract

PURPOSE:To provide a developer supplying container by which a thermally welded film is easily peeled when it is peeled in the case of supplying developer, the cut of film and pseudo sticking are prevented, and the developer does not stick to the film. CONSTITUTION:This developer supplying container 1 is provided with a developer container 01 having a developer supply opening part 02, the peelable film 04 covering and hermetically sealing the opening part 02, and a surface to be welded 02' which is is formed on the periphery of the opening part 02 and on which the film 04 is welded. A welding layer showing welding force when it is heated is incorporated in the surface 02'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing method in which a film is peeled off when it is replenished with a developer, which is sealed by thermal welding using a film and is supplied to a dry electrophotographic copying machine or printer. The present invention relates to an agent supply container and a heat welding method.

[0002]

2. Description of the Related Art Conventionally, a developer replenishing container has a container body having a developer replenishing opening mainly made of synthetic resin, paper or the like, and [polyethylene terephthalate (PET) layer / nylon layer] or [biaxial [Oriented polypropylene (OPP) layer / nylon layer] based on a synthetic resin film, which is mainly composed of an ethylene vinyl acetate copolymer (EVA) which is melted by heating to exhibit a welding force It is composed of a heat-welding film as shown in FIG. 5 in which a welding layer is laminated via a PE layer which is a cushioning material, and the heat-welding film is heat-welded to a flange portion around the developer supply opening and the like. It is common to seal the storage.

The developer is replenished with the developer replenishing opening of the developer replenishing container facing downward as shown in FIG. 4 and fitted in the developer replenishing portion on the main body side such as a copying machine, and the film is pulled by hand or the like. The developer replenishing opening was opened while peeling off the welded portion of the container and the replenishment.

[0004]

However, in the conventional developer replenishing container, when peeling off the film that has been heat-welded during developer replenishment, the [film-container] welding strength, that is, [welding layer-container welded If the interfacial peel strength of [Face] becomes too large, the interlayer strength of [nylon layer-PE layer] will be relatively weak, resulting in delamination between [nylon layer-PE layer], which may cause film breakage. was there. Further, in a developer replenishing container having a developing device integrated cartridge and a shutter member for opening and closing the developer replenishing opening, since the heat-welding film has a structure in contact with moltoprene, a shutter, etc., if it is left under high temperature and high humidity, Due to the blocking phenomenon of the welding layer, pseudo-adhesion was likely to occur between [welding layer-moltoprene, shutter, etc.], and a very large force was sometimes required when peeling off the film.

Further, the welding layer has a rough surface as compared with PET, OPP and nylon, which are the film bases, and therefore a large amount of the developer tends to adhere to the film, and even if the wiping member and the film are slid, the developer does not remain. Hard to wipe off.
Therefore, when the film is peeled off when the developer is replenished, the developer adhered to the film may stain the surroundings.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its object is to easily peel off the heat-welding film at the time of replenishing the developer, resulting in breakage of the film and imitation of the film. An object of the present invention is to provide a developer supply container capable of preventing adhesion and preventing the developer from adhering to the film.

[0007]

In order to achieve the above object, in the present invention, a developer container having a developer replenishing opening, a peelable film covering and sealing the opening, and In a developer replenishing container having a surface to be welded, which is formed on the periphery of an opening, and has a surface to be welded, a welding layer that develops a welding force by heating is incorporated in the surface to be welded.

The welding layer can also be incorporated into the surface to be welded by coating.

Further, the welding layer can be incorporated into the surface to be welded by two-color molding.

[0010]

In the developer replenishing container configured as described above,
Since the welding layer that develops the welding force by heating is incorporated in the surface to be welded formed on the periphery of the opening, the welding layer and the PE layer are not necessary in the film.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

FIG. 1 shows a means for heat-sealing a film around a supply opening of a developer supply container which best represents the features of the present invention. 2 shows a cross-sectional view of FIG. 1, and FIG. 3 shows a cross section of the heat-welding film. Here, 01 is a developer supply container, 02
Is a developer replenishing opening, 02 'is a surface to be welded around the developer replenishing opening 02, 03 is a heat welding jig, 03' is a protruding portion of the heat welding pattern of the heat welding jig, Reference numeral 04 represents a heat welding film.

The developer supply container 01 in this embodiment is
As shown in FIG. 2, as shown in FIG. 2, since a welding layer mainly composed of EVA or the like which is melted by heat and develops a welding force is incorporated in the welded surface 02 ′ of the container to the heat welding film, Instead of the four-layer heat-welding film 05 as shown in FIG. 5, in which a fusion-bonding layer is laminated on a synthetic resin film substrate layered with a [PET or OPP layer / nylon layer] via a PE layer that is a cushioning material. , [PET or O
Even when a film 04 (FIG. 3) having a double-layer structure such as a PP layer / nylon layer] is used, the supply opening 02 can be sealed by the same heat welding means as in the conventional case. As the film, a laminated film as shown in FIG. 3 is merely an example, and a single layer film may be used, and not only a resin but also a film such as paper or aluminum can be used.

As used herein, the term "heat-welding means" means that the heat-welding film 04 covers the replenishing opening 02 with the replenishing opening 02 of the developer replenishing container 01 facing upward as shown in FIGS. Using a heat welding jig 03, which is made of aluminum or brass and provided with protrusions 03 ′ of a heat welding pattern, heat and pressure are applied from the upper surface of the film 04 to the periphery of the developer supply opening 02. The addition is to seal the developer replenishing opening 02.

Since the welding layer and the PE layer which is the cushioning material are removed from the film by using the film 04 having the two-layer structure, the interface peeling between [welding layer-container welded surface] of the conventional four-layer film 05 is performed. It is possible to prevent film breakage due to delamination between [nylon layer-PE layer] that occurs when the strength is very high. Also, its surface is rough,
Therefore, instead of the welding layer, which was easy to attach a large amount of developer, the nylon layer, which has good surface smoothness, seals the developer, so even if the developer adheres to the film, it can be easily wiped off. Can be wiped off with
When the film is peeled off when the developer is replenished, it is possible to prevent the surroundings from being soiled by the developer attached to the film.

That is, according to the present invention, a heat-welding film is prepared by incorporating a welding agent containing EVA or the like, which is melted by heat and exhibits a welding force, as a main component into a surface to be welded around a developer supply opening by coating. No welding layer and PE layer are required, and only the base portion can be heat-welded to the container. Therefore, as the film, not only a laminated film such as [PET layer / nylon layer] or [OPP layer / nylon layer] but also a single layer film can be used, and the material is not only resin but also paper or paper. Films such as aluminum can also be used, which greatly increases the degree of freedom. By using the film having such a structure, it is possible to completely prevent the film breakage due to the delamination of the [nylon layer-PE layer] that has conventionally occurred.

Further, the film surface is smoother than the conventional welding layer, and the developer is less likely to adhere to the film. Even if the developer adheres, the wiping member can easily wipe it off.

Since the film does not have a welding layer, pseudo-adhesion due to blocking with other parts is eliminated, and a very large force is not required when peeling off the film.

The welding agent can be incorporated around the developer replenishing opening portion more easily than coating by two-color molding with the container body.

[0020]

EFFECTS OF THE INVENTION The present invention has the above-mentioned constitutions and functions, and eliminates the need for a welding layer and a PE layer in a film,
It can be heat-welded to the container with only the base portion. Therefore, as the film, not only a laminated film such as [PET layer / nylon layer] or [OPP layer / nylon layer] but also a single layer film can be used, and the material is not only resin but also paper or paper. Films such as aluminum can also be used, increasing the degree of freedom. Furthermore, by using such a film, it is possible to prevent film breakage that has conventionally occurred.

On the other hand, since the surface of the film is not a conventional welding layer, it is difficult for the developer to adhere thereto, and even if it adheres, it can be easily wiped off with a wiping member.

Since the film has no welding layer, pseudo-adhesion due to blocking with other parts is also eliminated, and a large force is not required at the time of peeling the film.

[Brief description of drawings]

FIG. 1 is a perspective view showing a developer supply container according to an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a cross-sectional view of the two-layer film of the present invention.

FIG. 4 is a schematic diagram showing a method of replenishing a developer.

FIG. 5 is a cross-sectional view of a conventional four-layer film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Developer supply container 01 Developer container 02 Developer supply opening 02 'Welding surface 03 Heat welding jig 04 Heat welding film 05 Conventional heat welding film

Claims (3)

[Claims] 1. A development having a developer container having a developer supply opening, a peelable film covering and sealing the opening, and a welded surface formed on the periphery of the opening for welding the film. A developer supply container, wherein a welding layer that develops a welding force by heating is incorporated in the surface to be welded. 2. The developer supply container according to claim 1, wherein the welding layer is incorporated into the surface to be welded by coating. 3. The developer supply container according to claim 1, wherein the welding layer is incorporated into the surface to be welded by two-color molding.