JP3088053B2 - Developer supply container - Google Patents

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 and used when replenishing a filled developer to a dry-type electrophotographic copying machine or a printer by sealing the film by heat welding. 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 main body having a developer replenishing opening mainly made of synthetic resin, paper or the like, and a [polyethylene terephthalate (PET) layer / nylon layer] or [biaxial]. [Stretched polypropylene (OPP) layer / nylon layer] as a base material, which is mainly composed of an ethylene vinyl acetate copolymer (EVA) or the like, which melts by heating to develop a welding force. A heat-sealing film as shown in FIG. 5 in which a welding layer is laminated via a PE layer serving as a cushion material, and this heat-sealing film is heat-welded to a flange portion around the developer supply opening and the like. It is common to seal the storage.

As shown in FIG. 4, the developer is supplied by fitting the developer supply opening of the developer supply container downward into the developer supply section of the main body of a copying machine or the like, and pulling the film by hand or the like. The developer was replenished by opening the developer replenishing opening while peeling off the welded portion between the developer and the container.

[0004]

However, in the conventional developer supply container, when peeling off the heat-sealed film at the time of replenishment of the developer, the welding strength between [film-container], that is, [weld layer-container adhesion] If the interfacial peel strength of the [surface] is too large, the interlayer strength of the [nylon layer-PE layer] is relatively weak, so that delamination occurs between the [nylon layer-PE layer], which may cause the film to break. was there. Further, in a developer supply container having a developer-integrated cartridge and a shutter member for opening and closing the developer supply opening, the structure is such that the heat-sealing film is in contact with maltprene, a shutter, and the like. Due to the blocking phenomenon of the welded layer, pseudo-adhesion easily occurred between [welded layer-maltoprene, shutter, etc.], and a very large force was sometimes required when the film was peeled off.

[0005] Further, since the surface of the welding layer is rougher than that of PET, OPP or nylon which is a film base, a large amount of the developer easily adheres to the film. Hard to wipe off.
Therefore, if the film is peeled off when the developer is supplied, the surroundings may be stained by the developer attached to the film.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. It is an object of the present invention to easily peel off a heat-sealed film when replenishing a developer, and to make the film cut and simulated. An object of the present invention is to provide a developer supply container that can prevent adhesion and does not cause the developer to adhere to a film.

[0007]

In order to achieve the above object, according to the present invention, there is provided a developer supply opening provided with a developer supply port.
A developer container to be accommodated, and the developer container covering the opening.
A film peelable from a container,
An agent container is used to weld the film to the periphery of the opening.
With a welding layer that develops welding force by heating
In the supply container, the welding layer is made of ethylene vinyl acetate.
A surface provided with a polymer and corresponding to the opening of the film;
And a surface in contact with the welding layer is provided with a nylon layer .

[0008] The welding layer may 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 supply container constructed as described above ,
The part corresponding to the opening of the film has a nylon layer
High surface smoothness allows developer to adhere to film
Hard to do. In addition, the part in contact with the welding layer
It has an iron layer and is welded with a material different from the welding layer
So that the fill from the developer container is
Easy to peel.

[0011]

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

FIG. 1 shows a means for thermally fusing a film around a replenishing opening of a developer replenishing container which best illustrates the features of the present invention. FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a cross-section of the heat welding film. Here, 01 is a developer supply container, 02
Is a developer supply opening, a hatched portion of 02 'is a welding surface around the developer supply opening 02, 03 is a heat welding jig, and a hatched portion of 03' is a projection of a heat welding pattern of the heat welding jig. Numeral 04 indicates a heat welding film.

In this embodiment, the developer supply container 01 is
As shown in FIG. 2, as shown in FIG. 2, a welding layer mainly composed of EVA or the like, which melts by heat and develops a welding force, is incorporated in a surface to be welded 02 'of a container to a heat welding film. Instead of a four-layer heat-sealing film 05 as shown in FIG. 5 in which a welding layer is laminated via a PE layer serving as a cushioning material to a synthetic resin film base layered on a [PET or OPP layer / nylon layer]. , [PET or O
Even if a two-layer film 04 (FIG. 3) having only a film base, such as a PP layer / nylon layer, is used, the replenishing opening 02 can be sealed by the same heat welding means as in the related art. As a film, a laminated film as shown in FIG. 3 is merely an example, and a single-layer film may be used, and a material such as paper or aluminum as well as resin may be used.

Here, as shown in FIGS. 1 and 2, the heat welding means means the heat welding film 04 so as to cover the replenishing opening 02 when the replenishing opening 02 of the developer replenishing container 01 faces upward. And heat and pressure are applied from the upper surface of the film 04 to the periphery of the developer supply opening 02 by using a heat welding jig 03 made of aluminum, brass or the like and provided with a protrusion 03 ′ of a heat welding pattern. In addition, the developer supply opening 02 is sealed.

By using the two-layer film 04, the welding layer and the PE layer serving as the cushioning material are removed from the film. Film breakage due to delamination between [nylon layer and PE layer], which occurs when the strength is very high, can be prevented. The surface is rough,
As a result, instead of a welded layer that easily adheres a large amount of developer, the structure is such that the developer is sealed with a nylon layer with a good surface smoothness. It is possible to wipe off
When the film is peeled off at the time of replenishing the developer, the surroundings can be prevented from being stained by the developer attached to the film.

That is, the present invention provides a heat-sealing film by incorporating a welding agent mainly composed of EVA or the like, which melts by heat to develop a welding force, on a surface to be welded around a developer supply opening by coating. This eliminates the need for a welding layer and a PE layer, and allows for heat welding to a container with a configuration consisting only of a base portion. Therefore, the film can be not only a laminated film such as [PET layer / nylon layer] or [OPP layer / nylon layer], but also a single layer film. Films such as aluminum can also be used, greatly increasing the degree of freedom. By using a film having such a configuration, it is possible to completely prevent film breakage due to delamination of the [nylon layer-PE layer], which has conventionally occurred.

Further, the surface of the film is smoother than the conventional welding layer, and the developer is less likely to adhere thereto. Even if the developer adheres, the film can be easily wiped off with a wiping member.

Since there is no welding layer on the film, there is no pseudo adhesion due to blocking with other parts, and there is no need for a very large force when peeling off the film.

Further, the welding agent can be incorporated around the developer supply opening by two-color molding with the container body, which can be easily incorporated by coating.

[0020]

As described above, according to the present invention,
The part of the film corresponding to the developer supply opening is nylon
By providing a layer, the surface smoothness also increases,
The developer hardly adheres to the film. Furthermore, Phil
The part in contact with the welding layer of the
Are welded with different materials, so the current
Easy peeling of film from imaging agent container
You.

[0021]

[0022]

[Brief description of the 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. 1;

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

FIG. 4 is a schematic view showing a method of supplying 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 'Surface to be welded 03 Heat welding jig 04 Heat welding film 05 Conventional heat welding film

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03G 15/08 B65D 1/00-1/48

Claims (3)

(57) [Claims] An image forming apparatus includes a developer supply opening for storing a developer.
Developer container, and the developer container covering the opening.
A peelable film, the developer container
Is used to weld the film to the periphery of the opening.
Developer replenishing container with welding layer that expresses welding force by heat
In vessels, the welding layer comprises ethylene vinyl acetate copolymer, wherein
A surface corresponding to the opening of the film, wherein the welding layer
Characterized by having a nylon layer on the surface in contact with
Refill container. 2. The developer supply container according to claim 1, wherein the welding layer is incorporated into a surface to be welded by coating. 3. The developer supply container according to claim 1, wherein said welding layer is incorporated into a surface to be welded by two-color molding.