JPS6325670A - Wet type developing method and its device - Google Patents

Abstract

PURPOSE:To miniaturize a whole device by solidifying toner to execute development with the small amount of developer. CONSTITUTION:At the time of rotation of a developing roller 1, solid toner 2 is applied to the periphery of the roller 1. The toner is dissolved into inflowing developer 8, and while migrating in the developer 8, stuck to a latent image formed on the surface of a photosensitive body 0 by electristatic power to develop the latent image. Excess toner not contributed to the development and the developer 8 are scraped from the surfaces of the developing roller 1 and a reverse roller 4a by a scraper 4b and recovered to the surface of a developer tray 4c. The recovered developer 8 is sent to a developer cleaning means 5 through a developer discharge port 4d and a pipe 9, the toner is separated and removed to clean the developer and then the cleaned developer is again fed to a developer inflowing means 3 by a developing feeding means 6 through pipes 10, 11. Thus, the device can be miniaturized.

Description

[Detailed Description of the Invention] (Prior Art) Conventional wet-type developing devices for electrophotographic copying machines and the like use a developer in which toner is dispersed in advance, so it is necessary to reduce the frequency of toner replenishment. has a large amount of current
This requires a developer container capable of accommodating the toner and a toner bottle for replenishment, which has the disadvantage of increasing the size of the entire developing device.

(Objective) An object of the present invention is to provide a small-sized wet developing device.

(Structure) In the present invention, solid toner is applied to the same in'T of the roller by being brought into contact with pressure, and the applied toner is moved in the gap between the photoconductor and the current roller while being moved by a heating agent. The VF group is used to visualize the 11 formed on the surface of the photoreceptor by flowing the photoreceptor into the photoreceptor.

The present invention will be explained below with reference to illustrated embodiments.

The wet type developing device according to the present invention includes a developing roller 1 and a solid toner 2, as shown in Figure 1, for example.

It is composed of a developer flow acquisition device 5, a developer recovery means 4, a developer purification means 5, and a developer supply means 6.

The developing ball roller 1 is rotatably supported by the device frame 7Vc, and is driven by a drive device (not shown) as shown in Figure 1-i.
and rotated in the direction of the arrow.

The developing roller 1 has a V between its peripheral surface and the surface of the photoreceptor 100.
c They are arranged so that a gap G is formed through which the current ball cutting 8 flows.

The solid toner 2 is mounted on a support 2a that is detachably attached to the device frame 7, and its end surface is pressed against the circumferential surface of the developing roller 1 by the elasticity of an extensible coil spring 2b disposed inside the support 2a. is pressed against. This solid toner 2 has a width approximately equal to the width of the developing roller 1.

The developer inlet means 5 is composed of a liquid supply nozzle having a liquid supply port 3a formed in a width approximately equal to the width of the developing roller 1, and is configured to direct the liquid supply port 6a toward the gap G into the device frame 7. Fixed (・ru.

The developer collecting means 4 includes a reverse roller 4a, a scraper 4b, and a developer tray 4c.

The reverse roller 4a is made of a soft elastic material such as urethane foam, and is rotatably supported by the mounting frame 7. Further, the reverse roller 4a is arranged so that its peripheral surface is in pressure contact with the surface of the photoreceptor O, and is rotated in the opposite direction to the rotational direction of the photoreceptor O by the drive device.
Be covered up.

The scraper 4b is fixed to the apparatus frame 7 with one end in contact with the circumferential surfaces of the developing roller 1 and the reverse roller 4a.

Current 1. Five Th cutting trays 4C are integrally formed with the apparatus frame 7, and have an existing cutting tray 4d formed at the bottom.

The developer acid purifying means 5 has a well-known filtration function such as a centrifugal separation method, an M absorption method, and an electrodeposition method, and is connected to a developer outlet 4d and Vc via a tube 9. .

The developer supply means 6 is constituted by a well-known liquid supply pump, and its liquid suction port is connected to the developer purification means 5 through a pipe 10.
, the liquid supply port is connected to the developer inflow means 3Vc via the pipe 11.
They are connected to each other.

When the developer supply means 6 is driven, the developer 8 is supplied to the liquid supply port 6 of the developer inflow means 6 through the pipe 11' (z).
It flows into the gap G from a.

On the other hand, currently, as the roller 1 rotates, the solid toner 2 is applied to the same surface thereof.

This toner is melted into the developer by the inflowing developer 8Vc, migrates in the developer 8, and then adheres to the layer 1 formed on the surface of the photoreceptor O by the fp electric force, as described above. Naruzuka is put under arrest.

The surplus toner and developer 8 that do not contribute to the visualization are
The scraper 4b Vc scrapes the peripheral surfaces of the developing roller 1 and the reverse roller 4a and collects the developer onto the developer tray 4C. This recovered current unit 141J
8 (including toner) is sent to the developer mound cleaning means 5 through the developer outlet 4d and the pipe 9, where LJ of toner is removed and purified, and then the developer is supplied by the developer supply means 6. , is fed again towards the developer inlet means 3 through the pipe 10.11.

The developer 8) circulating in each means is stored in advance in the developer tray 4c in such an amount that the circulation is not interrupted.

The current toner device configured as described above only needs to be increased by the amount of time required for its circulation, so it can be constructed compactly with the overall thickness of the device, and moreover, the toner can be reduced. Since it is isomorphic, when replacing it, 1c l
- There is no risk of toner splashing or toner leakage, and there is no possibility of contaminating the device and its surroundings.

Incidentally, in the embodiment shown in Figure 1, the solid toner 2 is an example of a case where it is formed into a rectangular shape. As shown, this solid toner 2
may be formed into a roller shape as shown in FIG. 372, for example.

When the solid toner 2 is formed into a cola-like shape, the arm 2d is supported at a swivel position relative to the device frame 7.
While rotatably supporting the support shaft 2c, the tensioner installed between the arm 2d and the device frame 7,! i
The elasticity of the i-type spring 2e presses the circumferential surface of the C solid toner 2 against the circumferential surface of the developing roller 1, and the toner is applied to the circumferential surface of the developing roller 1.

Further, when the above-mentioned developing device is used in a color copying machine, for example, as shown in Fig. It will be installed.

Each of these solid toners 2 is held by a coil spring 2b in the same way as the above-mentioned one.
It is configured to be pressed against the peripheral surface of. In addition, each solid toner 2 is connected to each lenoid 2g VC by a wire 2fK, and when one of these lenoid 2g is activated, only the solid toner connected to this lenoid is transferred to the developing roller. The coil spring 2b is configured to press against the circumferential surface of the coil spring 2b by the elastic force of the coil spring 2b.

Therefore, the developing device shown in FIG.
The solid toner 2 of a desired color is produced by selectively activating one of the lenoids depending on the situation.
By sequentially making the latent image visible, a C color copy can be obtained.

Further, in this developing device, the developer 8 is omitted during development at
Since it is constantly collected and purified, it has the effect of reliably preventing color mixing of toners that tends to occur when applied to color copying machines, and it is possible to obtain clearer color copies.

On the other hand, as the developer 8, for example, Ainpar G, E (
, L (manufactured by Ekun Co., Ltd.), indodecane (manufactured by BP Chemical Co., Ltd.), and K.P.

1620, 2028. 2835 (manufactured by Idemitsu Petrochemical Co., Ltd.) etc. are used.

The solid toner 2Vc is Printex 0. V.

U, Special blank 15.4 (manufactured by Degussa), #4
4. #30. MR-11, MA-100 (manufactured by Mitsubishi Kasei Corporation), Moga (L), Buranokvars 1600
゜1100, 900 Regal 400, 66C
J (manufactured by Kabonoto), News Vector ■, Ravi 7
Inorganic pigments such as 1035.1252 (manufactured by Columbia), Phthalocyanine Flu, Phthalocyanine Green, Sky Blue, Rodasson Lake, Maukite Green Reiki, Methyl Violet Lake, Peacock Blue Lake, Naphthol Green B, Naphthol Green Y, Naphthol Yellow S, naphthol red,
Rin Lu First Yellow 2G.

Barmai Ntreno l-”4R, Brilliant Fast Scarenoto, Ha/The Yellow, Benzidine Yellow,
Sonol Red, Lake Red C, Lake Red D, Brilliant Carmino 6B, Permanent Red F 5R
h Pigment Scarlet 3B.

Indigo, Thioindigo, Oil Pink, Bordeaux IO
Organic pigments such as B are used as the colorant.

Further, as the resin for hardening the above-mentioned coloring material, R2-COOCnH2n+1. vinyl monomer A represented by n=6-2θ), and R3=COOCnH2n+1. n=1-5).

n=COOCH2CH2CHCH2,C0OH.

C00CE(2CH20H, C00CH2CH2N (
CH3)2゜C00CH2CH2N (C2H3)2.
and vinyl monomers represented by vinylpyridine/l vinylpyrrolidone, ethylene glycol dimethacrylate styrene, divinylbenzene, vinyltoluene/
, a copolymer of one or several types of monomer B, or a draft copolymer.

Others, N-10, N-11, N-12, E-
14, T-34°N-45, c-1o, C-13, C
-15,C-16゜E-10,E-11,E-12,E
-14, E-15 (Eastman Chemical Company 9. 110P, 220P, 220MP
, 320'yp, 410MP,
210MP.

310MP, 405MP, 21JO
P, 4202E, 4053E (Mitsui Petrochemical), 131P, 151P, 161F, 1
71P, E300. E250P (Sanyo Chemical), Hl, H2, AI, A2. A3. A4
(Sasol), 0AWAX, AWAX (BASF), BAREC'0500. BARECO2000,E
-730,E -2018°E2020. E1 mouth 4
0, Petronab C, Petronab
aC-66, Petronaba C-400, Peto
ronabaC-7500.

(PetroLite), PE580, PE130, PED121
, PED136. PED -153.

PED521. PED522. PED534゜(H
oechst), DYN Engineering, DYNF, DYNH, DYNJ,
DYNK (Union Carbide), 0RUZON 805, 705, 5
0.

(Monsite), ALATHON3. 10. 12. 14. 16.
20. 22. 23 (f Yubon), AC polyethylene 6, 6A, 615 (Allied Chemical) Evaflex 150. 210. 220. 250
．． 2601310, 360. 410. 420.
450. 460. 550゜560゜ (Mitsui Polychemicals), synthetic polyethylene, polypropylene and modified products thereof, and carnauba wax.

Montan Fuchs, Candelilla Wax, Sugar Cane Wanox, Auriculari Fuchs.

'M wax, wooden can, bran wax, natural wax, ester gum, hardened rosin, natural resin, natural resin modified maleic acid resin, natural resin modified phenolic resin, natural resin modified polyester! Natural resin modified hardened resins such as oil, natural resin modified resin, taerythritol resin, epoxy resin, etc. are conveniently used.

Regarding the coloring material, synthetic polyethylene/.

It may be treated with natural resin, natural resin modified hardened resin, etc.

The solid toner 2 is prepared using a ball mill or a kitty mill using the above-mentioned colorant and resin and their milling.

It is formed by putting it into a dispersing machine such as a disc mill, pin mill, or vibration mill, and performing dispersion and kneading, followed by desolvation by pressing or the like.

(Effects) The wet type developing device of the present invention can perform development by scraping the surface of a sidewalk by solidifying the toner, so that the overall size of the device can be reduced to a smaller size.

[Brief explanation of the drawing]

]・Figure 1 is a new view of a wet type developing device showing one embodiment of the present invention, Figure 3-2 is a sectional view of a wet type developing device showing another embodiment of the present invention, ]・Figure 3 is a new view of a wet type developing device showing one embodiment of the present invention. FIG. 7 is a partially cutaway diagram of a wet type developing device showing still another embodiment of the present invention. 0... Photoreceptor, 1... Developing roller, 2... Solid toner, 3... Developer inflow means, 4... Developer collection means, 5... Development ii1 purifying means, 6. ...Developer supply means, 8... Gentoshi Procedural Amendment September 22, 1985 Director General of the Patent Office Ll, Indication of Case Patent Application No. 169319 No. 169319 of 1988 2, Name of Invention Wet Development Method and Apparatus 3. Relationship with the case of the person making the amendment Name of patent applicant (674) Ricoh Co., Ltd. 4, Agent
Person 5, "Detailed Description of the Invention" column of the specification subject to amendment (1) rMoga (L) on page 8, line 18 of Mei PIA
Correct to J worMogaQLJ. (2) "News Vector l115" on page 8, line 20
Change "Bin" to "Neo Spectra ■, Raben".

Claims (1)

[Claims] 1. The developing roller is rotated by forming a gap between the surface of the photoreceptor and the circumferential surface of the developing roller through which the developer flows, and the developer is solidified on the circumferential surface of the developing roller. A wet developing method in which the toner is applied to the circumferential surface by pressing the toner, and the toner is caused to migrate by flowing the developer into the gap to visualize the latent image formed on the surface of the photoreceptor. . 2. A developing roller rotatably supported with a gap that allows developer to flow into the surface of the photoreceptor; a solid toner supported in pressure contact with the circumferential surface of the developing roller; A developer inflow means for flowing the developer toward the gap, a developer collection means for recovering the developer that has flowed into the gap, and a developer purification means for purifying the collected developer. and a developer supply means for again supplying the developer purified by the developer purification means to the developer inflow means.