JPH0755567Y2 - Liquid developer supply container - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a replenishment container for a liquid developer for electrophotography, and more particularly to a replenishment container for a high-viscosity liquid developer for electrophotography.

[Prior art]

Conventionally, the liquid developer for electrophotography has been replenished by a feeder cap of a replenishing container as shown in FIGS. 1A and 1B. That is, the solenoid or the like is operated by the replenishment signal, the plate 1 pushes up the packing 3 of the feeder cap 2, and the developer is replenished by a natural drop from the gap formed between the packing 3 and the cap. When there is no replenishment signal, the gap is closed by the spring 4 and replenishment is stopped. This conventional replenishing means does not cause a problem in replenishing a low-viscosity developer, but has a problem in that a high-viscosity developer does not fall naturally.

Further, in order to solve such a problem, as a replenishing container for a high-viscosity developer, a conventional pressurizing CFC gas, LPG,
Sepro cans, bag-in cans, piston cans, aerosol cans and the like using dimethyl ether and the like are known, but there is a problem of pollution for CFCs, and there is a problem with safety for LPG, dimethyl ether, etc., There were some drawbacks.

〔Purpose〕

An object of the present invention is to provide a liquid developer supply container which does not have the conventional drawbacks as described above.

〔Constitution〕

The inventors of the present invention have conducted extensive studies to achieve the above-mentioned object, and as a result, in a container for replenishing the stored liquid by pressing the stored liquid outflow member protruding to the outside, the stored liquid delivery container is made of an elastic body. It consists of a flexible bag-like container surrounded by
A liquid developer replenishing container, characterized in that a liquid developer containing a colorant, a resin and an aliphatic hydrocarbon carrier liquid is press-fitted into the flexible bag-shaped container. It has been found that the above object can be achieved by providing

The present invention relates to a container for stably replenishing an electrophotographic liquid developer, particularly a high-viscosity replenishing liquid developer, and relies on the restoring force of an elastic body for the developer supplying operation.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 2 shows an example in which a rubber tube is used as an elastic body in the liquid developer supply container of the present invention. In the liquid developer supply container of the present invention, there is a plastic bag 6 such as polyethylene terephthalate or polypropylene surrounded by a thick rubber tube 5, and the liquid developer 7 is contained in the plastic bag 6. ing. These are stored in the protective container 8. Press plate by spring 9 at normal time
10 is lifted to the upper part of the figure, and the packing 11 prevents the developer from leaking. When replenishing the developer, the aperture 12 is pushed by the action of the cam, solenoid, etc. in response to the replenishment signal from the density sensor, and the replenishment of the developer is performed through the gap of the packing 11. In this way, even if the filled developer has a high viscosity, it can be replenished by the restoring force of the rubber tube 5.

The replenishing container of the present invention is suitable for use in a developer having a relatively high viscosity, for example, a viscosity of 500 millipascal seconds (mPa-s) or more, or a developer having a relatively high solid content.

The liquid developer used here is a carrier liquid having a high insulating and low dielectric constant and toner particles composed of a colorant and a binder resin dispersed therein, and a polarity control agent may be added depending on the case.

Examples of the aliphatic hydrocarbons commonly used as a carrier liquid include Isopar L (boiling point 183-210, manufactured by Exxon Co.).
℃), Isopar M (205-252 ℃), Isopar G (15
8 to 177 ° C), Isopar H (174 to 190 ° C), Idemitsu Petrochemical IP Solvent 2028 (210 to 265 ° C), IP Solvent 2835 (275 to 350 ° C), IP Solvent 1620 (166 to 205)
℃), Nisseki Chemical Co., Ltd. Isozol 400 (206-257
C.), isododecane (176 to 185.degree. C.) manufactured by BP Chemical Co., etc., and isooctane and ligroin (boiling points 120 to 190.degree. C.) can also be used.

As the coloring material used in the present invention, Degussa's Printex G, Printex V, Printex U, Special Black 15, Special Black 4 Mitsubishi Kasei # 44, # 30, MR-11, MA-100 Cabot Company Mogul L, Black Pearl 1300,1100,90
0 Regal 400,660 Inorganic pigments such as Colombia's Neospectra II, Raven 1035,1252, and phthalocyanine blue, phthalocyanine green, sky blue, rhodamine lake, malachite green lake, methyl violet lake, peacock blue lake, naphthol green B, naphthol green Y , Naphthol Yellow S, Naphthol Red, Resor Fast Yellow 2G, Permanent Red 4R, Brilliant Fast Scarlet, Hansa Yellow, Benzicine Yellow, Resor Red, Lake Red C, Lake Red D, Brilliant Carmine 6B, Permanent Red.
Organic pigments such as F5R, Pigment Scarlet 3B, Indigo, Thioindigo, Oil Pink, and Bordeaux 10B are used.

The resin used in the present invention has the general formula _{(R 1 = -H, -CH 3} R 2 = -COOCnH 2n + 1 n = 6~20) vinyl monomer A of the general formula represented by _{(R 1 = -H, -CH 3} , -COOCH ₂ CH ₂ OH -COOCH ₂ CH ₂ N (CH ₃ ) ₂ , -COOCH ₂ CH ₂ N (C ₂ H ₅ ) ₂ ) vinyl monomers and vinyl pyridine, ethylene glycol dimethacrylate styrene, divinylbenzene , And a monomer B selected from the group consisting of vinyltoluene, or several copolymers or graft copolymers.

Other Eastman Chemical Company N-10, N-11, N-12, N-14, N-34, N-45, C-10, C-13, C-15, C-16,
E-10, E-11, E-12, E-14, E-15 Mitsui Petrochemical Company 110P, 220P, 220MP, 320MP, 410MP, 210MP, 310MP, 405MP, 200
P, 4202E, 4053E Sanyo Kasei Co. 131P, 151P, 161P, 171P, E300, E250P Sazol H1, H2, A1, A2, A3, A14 BASF OA WAX, A WAX Petrolite BARECO 500, BARECO 2000, E- 730, E-2018, E2020, E1040, Petronava C, Petronava C-36, Petronava C-400, Petronava C-7500 Hoechst PE580, PE130, PED121, PED136, PED153, PED521, PED522, PED
534 Union Carbide Company DYNI, DYNF, DYNH, DYNJ, DYNK Monsanto Company ORLIZON 805,705,50 DuPont Company ALATHON 3,10,12,14,16,20,22,23 Allied Chemical Company AC Polyethylene 6,6A, 615, etc. Polyethylene, polypropylene and its modifications.

Natural wax such as carnauba wax, montan wax, candelilla wax, sugar cane wax, auricurie wax, beeswax, wood wax, nuka wax, ester gum, natural resin such as cured rosin, natural resin modified maleic acid resin, natural resin modified phenol A resin, a natural resin modified polyester resin, a natural resin modified pentaerythritol resin, an epoxy resin, or another natural resin modified cured resin can be appropriately used.

Regarding coloring materials, synthetic polyethylene, natural resin,
It may be treated with a modified natural resin or the like. These coloring material, resin, and solvent are put into a dispersing machine such as a ball mill, a kitty mill, a disc mill, a pin mill or the like to carry out dispersion and kneading.

Hereinafter, the present invention will be described in more detail with reference to the following embodiments.

Example Viscosity is 50 millipascal second (mPa-s), 100mPa-
s, 200mPa-s, 500mPa-s, 1000mPa-s, 2000mPa-s and 500
First, a replenishment liquid developer for replenishment of 0 mPa-s was prepared.
A replenishment test was carried out by putting the respective replenishment containers as shown in FIG. 2, FIG. 3 and FIG.

When using the conventional replenishment container as shown in FIG. 1,
The developer having a viscosity of 50 to 200 mPa-s could be replenished, but the developer having a viscosity of 500 mPa-s or more could not be substantially replenished. Further, as the viscosity increased to 50, 100, 200 mPa-s, the amount of developer replenished during one replenishment operation gradually decreased.

On the other hand, when the replenishing container of the present invention as shown in FIGS. 2 and 3 was used, the developer having a viscosity of up to 5000 mPa-s could be replenished.

〔effect〕

According to the replenishing container of the present invention, high-viscosity toner can be replenished and can be replenished regardless of the viscosity.

[Brief description of drawings]

FIG. 1A is a schematic explanatory view of a conventional developer supply container,
FIG. 1B is an enlarged explanatory view of the vicinity of the feeder cap. FIG. 2 is a schematic explanatory view of a developer supply container of the present invention using a rubber tube as an elastic body. 1 ... Plate, 2 ... Feeder cap 3 ... Packing, 4, 9 ... Spring 5 ... Rubber tube, 6 ... Plastic bag 7 ... Liquid developer, 8 ... Protective container 10 ... Holding plate, 11 …… Packing 12 …… Aperture

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kayoko Nagai, 1-3-6 Nakamagome, 1-6 Nakamagome, Ota-ku, Tokyo (56) References

Claims (1)

[Scope of utility model registration request] 1. A container for replenishing stored liquid by pressing a stored liquid outflow member projecting to the outside, wherein the stored liquid delivery container is a flexible bag-like container whose outer circumference is surrounded by an elastic body. A liquid developer replenishing container, characterized in that a liquid developer containing a colorant, a resin and an aliphatic hydrocarbon carrier liquid is press-fitted into the flexible bag-like container.