JP3156951B2 - Method for regenerating developer carrier, regenerated developer carrier and developing device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic method for developing a latent image formed on a latent image holding member such as an electrophotographic photosensitive member or an electrostatic recording dielectric to visualize the latent image. the method for regenerating a developer carrying member used in the developing apparatus, reproduction developer carrying
The present invention relates to a body and a developing device using the same.

[0002]

2. Description of the Related Art Conventionally, for example, a developing device for developing an electrostatic latent image formed on the surface of a photosensitive drum as an image carrier with a magnetic toner of a one-component type developer has a friction between magnetic toner particles and Due to friction between the developing sleeve as a developer carrier and the magnetic toner particles, a charge having a polarity opposite to that of the electrostatic latent image on the photosensitive drum and a developing reference potential is applied to the magnetic toner particles, and the magnetic toner is applied to the developing sleeve. And transfer it to the developing area where the photosensitive drum and the developing sleeve are opposed to each other. In the developing area, the magnetic toner is applied to the electrostatic latent image on the surface of the photosensitive drum by the action of a magnetic field of a magnet immovably installed in the developing sleeve. There is known an image forming apparatus that flies and adheres to an image to develop the electrostatic latent image as a toner image.

However, in the above-described conventional developing device, the developer particles (hereinafter referred to as toner) coated on the sleeve are continuously rotated while the developer carrier (hereinafter referred to as a sleeve) rotates repeatedly. and referred) charge amount (g Li Bo) is too high, the toner is less likely to move to the latent image on the image holding member from the sleeve (drum), so-called, occur charge-up development especially under low humidity easily. When such charge-up occurs, the amount of developed toner is reduced, so that a line image is thinned and a solid image is an image having low image density.

[0004] Further development developing position once the image density with high solid image on the sleeve come to the same position at the next rotation of the developing sleeve, where the halftone image Ru <br/> be developed to a half-tone image on In this case, a so-called sleeve ghost development is likely to occur, in which a trace of a solid image appears. As a method of solving such a phenomenon, as described in JP-A-2-105181 and JP-A-3-36570, instead of the conventional sleeve of a metal cylindrical tube, the surface of the metal cylindrical tube is There has been proposed a method of forming a resin film made of a resin, conductive fine powder, a solid lubricant, and the like, and using the resin film in a developing device. By using this method, a sufficient tribo is given to the toner carried on the sleeve for development, the tribo distribution of the toner is stabilized, and charge-up and sleeve ghost can be suppressed.

[0005] On the other hand, office automation and computerization of offices have progressed, and the demand for laser beam printers (abbreviated as LBP) has rapidly increased in order to image information and data on paper. The LBP is often used as a unit in which the center of the image forming process is integrated without causing toner scattering from its use environment, that is, a so-called cartridge. However, with the increase in the number of popularized LBPs, the problem of disposal of used cartridges has become apparent. These disposable disposals are not preferable due to global environmental problems. Recycling of parts and materials is required to achieve both ease of use of the cartridge system and environmental protection.

In general, as a resin for forming a film on the sleeve, a resin which is hard at room temperature is preferably used because the film is easily worn due to friction with the toner or friction with an elastic blade contacting the sleeve. For example, a phenolic resin, which is a thermosetting resin, is preferably used from the viewpoints of abrasion resistance and charge imparting property to the toner, but it has a high adhesion strength and can be separated without heat treatment in a very special organic solvent. Can not do.

Further, during continuous use of the sleeve, the toner is likely to be fused or fixed. In the case of fusing triggered by the low-temperature fixing component in the toner, it can be removed with a solvent, but the magnetic substance in the toner or inorganic fine powder such as silica is fixed so as to be embedded in the sleeve. In some cases, their removal is not possible with solvents. In this case, the physical properties of the sleeve naturally change. Also, although there is a difference in the amount of the resin-coated sleeve, wear can always occur, so in such a case, simply cleaning and reusing the sleeve is not enough in terms of maintaining high image quality. Not preferred.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to stabilize the charge imparting property to toner in various environments, to prevent the occurrence of charge-up phenomenon under low humidity, to obtain a sufficient line image and a dense solid image. An object of the present invention is to provide a method of regenerating a developer carrier capable of obtaining and reproducing an image , a regenerated developer carrier, and a developing device using the same. Another object of the present invention eliminates the sleeve ghost, a method of reproducing a developer carrying member that can obtain a uniform halftone image, reproduction developer carrier and its
Is to provide a developing device using the same. Another object of the present invention, other image characteristics, a method of reproducing the developer carrying member of the developing characteristics excellent in stability of the image density at the time of a large number of sheets of the continuous copying, reproducing the developer carrying member and use it It is to provide a developing device. Still another object of the present invention has the image performance after use cartridge, without discarding the metal cylindrical tube, after regeneration, the method of reproducing the developer carrying member having a similar performance again and Recycled developer
To provide a holding body . Still another object of the present invention is to provide
It is compatible with cartridge use and environmental protection.

[0009]

The above objects are achieved by the present invention described below. That is, the present invention is, on the cylinder made of metals, a first resin layer containing a resin soluble in an organic solvent which is at least a selected, second possible triboelectric charging to the current image agent thereon Place the developer carrier on which the resin layer is formed
Organic that can dissolve the resin contained in the first resin layer
Impregnated in a solvent and washed, the first resin layer and the second
After peeling and removing the resin layer, on the obtained metal cylinder,
Again, include a resin soluble in at least the selected organic solvent.
Forming a first resin layer having at least a developer thereon
Resin layer capable of applying triboelectric charge to the second resin layer
By forming method of reproducing a developer carrying member, characterized in that for reproducing the developer carrying member, a developing device using <br/> and it reproduce the developer carrying member.

[0010]

According to the present invention, on a metal cylinder that put the developer carrying member, to form a first resin layer containing a resin soluble in an organic solvent which is at least selected, at least a developing thereon By forming a resin layer capable of imparting triboelectric charge to the agent as a second resin layer, the charge imparting property to the toner in various environments is stabilized, and the charge-up phenomenon under low humidity hardly occurs. Reproducible developer carrier capable of obtaining a clear line image and a dark solid image
, A recycled developer carrier and a developing device using the same . In addition, according to the present invention, a sleeve ghost can be eliminated, a uniform halftone image can be obtained, and further, other image characteristics, image density stability during continuous copying of a large number of sheets, and the like, are excellent. In addition, after the cartridge is used, the metal cylindrical tube is regenerated without discarding , and then regenerated.
It is possible to provide a developing device using.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. Recycled developer carrier of the present invention
(Hereinafter simply referred to as a developer carrying member).
Either the second resin layer before regeneration or the second resin after regeneration
In addition, it is preferable to include a conductive fine powder and / or a solid lubricant. Furthermore the first resin layer before being reproduced and re
Any of the first resin layers after birth can also contain conductive fine powder. Further longitudinal coat width of the developer carrying member of the Kazuki fat layer is larger than the coating width of the second resin layer, it is also preferable that the first Kazuki fat layer is exposed to the surface at both ends regions.

[0012] The developer carrier of the present invention comprises a metal cylinder, a first resin layer containing a resin soluble in at least a selected organic solvent, and a triboelectric charge on the first resin layer. A developer carrier on which a second resin layer that can be applied is formed,
After being impregnated and washed with the organic solvent, the first and second resin layers are peeled off and removed , and the first metal containing a resin soluble in at least the selected organic solvent is again formed on the obtained metal cylinder.
A resin layer is formed, and a resin layer capable of imparting at least a triboelectric charge to a developer is formed on the resin layer as a second resin layer. In this reproducing method, similarly to the above, after the second resin layer and the reproducing before being reproduced second
It is preferable that the conductive fine powder and / or the solid lubricant be contained in any of the resin layers . Further, it is also possible that both the first resin layer before the regeneration and the first resin layer after the regeneration contain conductive fine powder. Further, it is preferable that the width of the first resin layer in the longitudinal direction of the developer carrier is larger than that of the second resin layer, and that the first resin layer is exposed on the surface in both end regions.

According to the present invention, the one-component developer contained in the developing container is carried on a developer carrier, and a thin layer of the developer is formed on the developer carrier by a developer layer thickness regulating member. A developing device that transports the developer by the developer carrier to a developing unit facing the latent image carrier, and develops the latent image formed on the latent image carrier. The developer carrier of the device forms a first resin layer containing a resin soluble in at least a selected organic solvent on a metal cylinder, and is capable of providing a triboelectric charge to at least the developer thereon. The developing device of the present invention can be provided by using a developer carrying member having a resin layer formed as a second resin layer.

Next, the method for regenerating the developer carrier of the present invention will be described .
The raw developer carrier and the developing device using the same will be described in more detail. Examples of the metal cylindrical tube used in the present invention include a stainless steel cylindrical tube and an aluminum cylindrical tube. In the case of a cartridge, an aluminum cylindrical tube is preferably used for the purpose of reducing the weight of the cartridge itself. As a method for producing an aluminum cylindrical tube, there are a drawing method, an extrusion method, and the like. In order to further increase the dimensional accuracy of the cylindrical tube itself, cutting and polishing are performed to obtain a predetermined dimensional accuracy. The straightness of the cylindrical tube is preferably 30 μm or less in order to obtain a good image.

A rough surface may be formed on these metal cylindrical tubes by sandblasting or polishing in order to impart appropriate irregularities to the surface thereof, if necessary. Either regular particles or irregular particles may be used as abrasive particles for sandblasting. As the film forming resin material used for the first resin layer and the second resin layer, generally known resins can be used. For example, styrene resin, vinyl resin, polyether sulfone resin, polycarbonate resin, polyphenylene oxide resin, polyamide resin, fluororesin, cellulose resin, thermoplastic resin such as acrylic resin,
A heat or light curable resin such as an epoxy resin, a polyester resin, an alkyd resin, a phenol resin, a melamine resin, a polyurethane resin, a urea resin, a silicone resin, and a polyimide resin can be used.

[0016] In the configuration of the present invention, using a resin soluble in the particular general purpose organic solvents in the first resin layer may be selected triboelectric charging of the preferred resins of the toner as the second resin layer. The resin of the second resin layer may be soluble in a solvent, but as a general configuration, the resin of the second resin layer is a hardening resin that is hardly soluble in the solvent when mechanical strength such as abrasion is considered. Becomes The width of the coating of the first resin layer and the second resin layer in the longitudinal direction of the sleeve differs depending on the image size and the configuration of the developing machine. However, it is preferable that the first resin layer is formed longer at both ends in the outer side in consideration of the peelability at the time of peeling the coating. The thickness of the first resin layer is about 0.01 to 20 μm, preferably about 0.1 to 10 μm, and the thickness of the second resin layer is about 0.1 to 50 μm, preferably about 1 to 50 μm.
About 20 μm.

Examples of the conductive powder to be added to the first resin layer and the second resin layer include conductive carbon black, metal powder such as aluminum, copper, nickel, and silver; antimony oxide, indium oxide, and oxide powder. Examples include conductive metal oxides such as tin, short metal fibers, and carbon fibers. The amount of these additives is 0.1 to
It is about 300% by weight, preferably about 1 to 150% by weight. Examples of the solid lubricant contained in the second resin layer include graphite, molybdenum disulfide, silicon nitride, and the like. The amount of these additives is 0.1
It is about 400% by weight, preferably about 1 to 200% by weight.

As a method for forming the resin layer in the developer carrying member of the present invention, there is a method by coating. Examples of the coating method include a generally known dipping method and spraying method. In any method, the thickness of the film can be adjusted by dispersing the resin in a solvent and adjusting the resin component concentration, the viscosity of the coating solution, the coating speed, the coating temperature and humidity, and the like. When the resin layer contains a solid lubricant or conductive powder, these dispersions may be prepared and dispersed in advance, and then coated. For dispersing these powders, generally known dispersing apparatuses, for example, dispersers using beads such as paint shakers, sand mills, attritors, dyno mills, pearl mills and the like are preferably used. After these coating films are coated, they are heated or irradiated with light as required, and dried or cured.

Next, a preferred embodiment of a developing device using the developer carrier of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross section of a developing device constructed according to the present invention. An image forming apparatus embodying the present invention forms a latent image on an image carrier by an electrophotographic process or an electrostatic recording process, and visualizes the latent image with a developing device having a developer carrier. It is possible to obtain an image by transferring the visible image to a transfer material, if necessary,
Since the configuration is well known to those skilled in the art, detailed description of the overall configuration and operation of the image forming apparatus will be omitted, and the developing device that characterizes the present invention will be described in detail below.

Referring to FIG. 1, for example, in an electrophotographic copying machine or the like, a drum-shaped electrophotographic photosensitive member, that is, an image carrier 1 called a photosensitive drum is formed by an electrostatic latent image formed by an electrophotographic process. It carries the image and rotates in the direction of arrow A. Of course, the photosensitive drum as the image carrier 1 is not limited to the drum shape, but may be a sheet shape or a belt shape. In any case, a developing device is arranged to face the photosensitive drum 1 in order to visualize the latent image formed on the photosensitive drum 1.

The developing device has a developer accommodating chamber 3 for accommodating a developer, that is, a one-component magnetic toner 4 in this embodiment, and bringing the toner 4 into contact with the surface of a sleeve 8 as a developer carrier. The sleeve 8 is fixed inside so that the multipolar permanent magnet 5 does not rotate, and carries the toner 4 on its surface and rotates in the direction of arrow B. A coating layer 7 according to the present invention is formed on a surface of a sleeve 8 made of a metal cylinder 6 to a thickness of 0.1 μm to 70 μm. Further, the developing device includes a doctor blade 2, which regulates the toner layer on the surface of the sleeve 8 carried in the developer accommodating chamber 3 to a predetermined thickness. The gap between the surface of the sleeve 8 and the doctor blade 2 is about 50 μm to 5 μm.
It is arranged so as to be 00 μm.

When the developing device constructed as described above is activated and the sleeve 8 rotates in the direction of arrow B, the toner 4 in the developer accommodating chamber 3 or the contact friction between the toner 4 and the surface of the sleeve 8. As a result, a charge having a polarity opposite to that of the electrostatic latent image on the photosensitive drum 1 with respect to the development reference potential is given to the toner 4 and applied to the surface of the sleeve 8. The toner layer applied to the sleeve surface is further uniformly and thinly layered (layer thickness is about 30 μm) by a doctor blade 2 disposed opposite to one magnetic pole (N pole in the figure) position of the multipolar permanent magnet 5. ~ 3
(Μm), and is conveyed to a developing area formed by the photosensitive drum 1 and the sleeve 8.

The thickness of the toner layer in the development area is smaller than the gap between the photosensitive drum 1 and the sleeve 8, so-called non-contact development is performed. In the development area, an AC bias may be applied between the sleeve 8 and the surface of the photosensitive drum 1 to cause the toner 4 on the sleeve 8 to fly in the direction of the photosensitive drum 1. FIG. 2 is a block diagram showing another embodiment of the developing device of the present invention, and FIG. 3 is a block diagram showing still another embodiment of the developing device of the present invention.

In the developing device shown in FIGS. 2 and 3, as a member for regulating the layer thickness of the magnetic toner 4 on the developing sleeve 8, a material having rubber elasticity such as urethane rubber or silicone rubber, phosphor bronze or stainless steel is used. An elastic plate 20 made of a material having metal elasticity is used, and this elastic plate 20 is pressed against the developing sleeve 8 in the developing device of FIG. 2 in a direction opposite to the rotation direction in the developing device of FIG. 8 is characterized by being pressed against the same orientation as the rotation direction. In such a developing device, a thinner toner layer can be formed on the developing sleeve 8. Other configurations of the developing device of FIGS. 2 and 3 are basically the same as those of the developing device shown in FIG. 1. In FIGS. 2 and 3, the same reference numerals as those shown in FIG. 1 denote the same members.

The developing device for forming a toner layer on the developing sleeve 8 as described above as shown in FIGS. 2 and 3 is applicable to a device using a one-component magnetic developer containing a magnetic toner as a main component. It is also suitable for those using a one-component non-magnetic developer whose main component is a non-magnetic toner. In any case, since the toner is rubbed on the developing sleeve 8 by the elastic plate 20, the amount of triboelectric charge of the toner is increased, and the image density can be improved. Therefore, it is suitable for coping with a shortage of the charge amount of the toner in a high humidity environment.

[0026] Then the developer carrying member of the present invention, is carried and transported, it will be described developer to be used for development. As the binder resin used for the toner, generally known resins can be used. For example, styrene, α-methylstyrene,
styrene such as p-chlorostyrene and its substituted products; acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, dodecyl acrylate, octyl acrylate, phenyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate; Monocarboxylic acids having a double bond such as butyl methacrylate, octyl methacrylate, acrylonitrile, methacrylonitrile, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, acrylamide and the like; for example,
Dicarboxylic acids having a double bond such as maleic acid, butyl maleate, methyl maleate, dimethyl maleate and the like; and substituted products thereof; for example, vinyl chloride, vinyl acetate,
Vinyls or vinyl esters such as vinyl benzoate,
Or a polymer using a vinyl monomer alone such as vinyl ethers such as vinyl ethyl ether, vinyl methyl ether and vinyl isobutyl ether;
Copolymers using at least one kind of monomer;
Butadiene copolymer, silicone resin, polyester resin, polyurethane resin, polyamide resin, epoxy resin, polyvinyl butyral resin, rosin, modified rosin,
Terpene resins, phenolic resins, aliphatic or alicyclic hydrocarbon resins, aromatic petroleum resins, chlorinated paraffins and the like; these may be used alone or in combination of two or more.

Further, a pigment can be contained in the toner. For example, carbon black, nigrosine dye,
Lamp Black, Sudan Black SM, First Yellow G, Benzidine Yellow, Pigment Yellow,
India First Orange, Irgazine Red, Rose Nitroaniline Red, Toluidine Red, Carmine FB, Permanent Bordeaux FRR, Pigment Orange R, Risor Red 2G, Lake Red C, Rhodamine FB, Rhodamine B Lake, Methyl・ Violet B Lake, Phthalocyanine Blue, Pigment Blue, Brilliant Green B, Phthalocyanine Green, Oil Yellow GG, Zapong First Yellow CGG, Kaya Set Y963, Kaya Set Y
G, Sumiplast Yellow GG, Savon First Orange RR, Oil Scarlet, Sumiplast Orange G, Orazol Brown B, Zapong Fast Scarlet CG, Eizen Spiron Red BE
H, oil pink OP and the like.

In order to use the toner as a magnetic toner, a magnetic powder may be contained in the toner. As such magnetic powder, a substance which is magnetized in a magnetic field is used, and examples thereof include powder of a ferromagnetic metal such as iron, cobalt, and nickel, and alloys and compounds such as magnetite, hematite, and ferrite. The content of the magnetic powder is preferably 15 to 70% by weight based on the weight of the toner.

Various release agents may be used in the toner. Examples of such release agents include polyethylene fluoride,
Fluororesin, fluorocarbon oil, silicone oil, low molecular weight polyethylene, low molecular weight polypropylene and the like can be mentioned. Furthermore, if necessary, a charge control agent may be added in order to facilitate positive or negative charging. These materials are mixed and kneaded by various methods, and are further made into fine particles to have a desired particle size. Further, colloidal silica or the like is externally added and mixed with these toners as needed, and used as a developer.

[0030]

Next, the present invention will be described more specifically with reference to examples and comparative examples. Example 1 In this example, the following one-component magnetic toner was used. ・ Styrene-butyl acrylate-n-butyl maleate half ester copolymer 100 parts by weight ・ Magnetite 100 parts by weight ・ Negative charge control agent 3 parts by weight ・ Low molecular weight polypropylene 3 parts by weight The above raw material mixture is mixed with a Henschel mixer. After that, the mixture was kneaded using a twin-screw extruder, then cooled, and roughly ground by a hammer mill.

Next, fine pulverization is performed by a jet mill, and then classification is performed by an elbow jet classifier, and the number% of particles having a volume average particle diameter of 6.7 μm and 4 μm or less is 23.5%.
As a result, 3.7% by weight of particles having a particle size of 10.8 μm or more was obtained. The particle size distribution is measured using a Coulter Counter TA-II
The measurement was carried out with a 100 μm aperture attached to a (Coulter). Colloidal silica was externally added to the toner using a 1.0% by weight Henschel mixer to obtain a developer (toner).

In order to evaluate the image, a commercially available laser beam printer and a laser jet III Si (manufactured by HP) were used after being modified so that they could be examined. An output device capable of obtaining a plurality of types of image patterns was connected thereto and used. In addition, similarly as a cartridge, laser jet
The EP-N cartridge for III Si was used by modifying the developing device so that the sleeve of this embodiment could be used. The test by image formation is a low humidity environment of 15 ° C / 10% RH,
The test was performed in three levels: a normal environment of 23 ° C./60% RH and a high humidity environment of 32 ° C./85% RH.

In each environment, a solid black density of 5 mm ² (5
■ Density), solid black density, toner charge on sleeve, and level on sleeve ghost image
The evaluation was performed while performing durability image output. The image density was measured using a Macbeth reflection densitometer, and the average value of 10 points in one image was determined. The toner charge was determined by sucking the toner through a filter and measuring the amount of charge stored at that time and the weight of the toner (mC / kg). As for the sleeve ghost, multiple 5 ■ solid images and a length equivalent to one round of the sleeve are displayed on the entire image, and in the latter half, a halftone image of 1 dot and 1 space is output. It was judged visually by how much it appeared.

Next, a developing sleeve was prepared. A resin liquid A was prepared by dissolving 10 parts by weight of a styrene resin in 100 parts by weight of toluene, further adding 5 parts by weight of fine titanium oxide powder, and dispersing the mixture in a sand mill. Separately, 40 parts by weight of graphite and 5 parts by weight of conductive carbon black were added to 60 parts by weight of a phenol resin dissolved in 300 parts by weight of a methanol / isopropyl alcohol mixed solution, and dispersed by a sand mill to prepare a resin liquid B. did.

An aluminum cylindrical tube is set up on a turntable rotatable by a motor, and the turntable is turned while applying a masking jig to both ends to determine a coating position, and the resin solution is sprayed on the turntable using a spray gun. Was used to coat an aluminum cylindrical tube. At this time, the thickness of the first resin layer was about 2 μm. After drying, put it on the turntable again,
The coating of the resin liquid B was performed in the same manner. Then, it was heat-cured to complete the formation of the second resin layer. The thickness of the second resin layer was 8 μm.

A flange was attached to the end of the sleeve, and the sleeve was attached to an EP-N cartridge. put it here,
As shown in FIG. 2, the blade for regulating the toner layer was an elastic blade having a free end opposite to the rotation direction of the sleeve. 350 g of the toner in the container of the developing machine
Then, the image was evaluated by performing three-level image output and tribo measurement on up to 6,000 sheets. The results are shown in Figure 4及 beauty Table 1.

Example 2 Next, the sleeve evaluated in Example 1 was removed from the developing device, the toner was removed with air, the sleeve was immersed in heated xylene, and the resin layer was wiped off. This was repeated three more times to completely peel off the resin layer on the aluminum cylindrical tube. Next, a resin layer was formed in exactly the same manner as in Example 1, and the same evaluation was performed. The results are shown in Figure 5 and Table 1.

Example 3 A resin solution was prepared by using 2.5 parts by weight of carbon black instead of 5 parts by weight of titanium oxide in the resin solution A, and used as a resin solution C. First in the same manner as in the method of the first embodiment.
The sleeve was formed so that the resin layer was 3 μm and the second resin layer was 11 μm. This sleeve was mounted on the same developing machine as in Example 1, and the same evaluation as in Example 1 was performed.
The results are shown in FIG. 6 and Table 1.

Example 4 Next, the sleeve evaluated in Example 3 was removed from the developing device, the toner was removed with air, the sleeve was immersed in heated xylene, and the resin layer was wiped off. This was repeated three more times to completely peel off the resin layer on the aluminum cylindrical tube. Next, a resin layer was formed in exactly the same manner as in Example 3, and the same evaluation was performed. The results are shown in Figure 7 and Table 1.

Example 5 In this example, the following one-component magnetic toner was used. A toner was prepared from the above raw materials in the same manner as in Example 1. The number% of particles having a volume average particle diameter of 8.8 μm and 4 μm or less was 11.3%, and the weight% of particles having a volume average particle diameter of 12.7 μm or more was 2.0%.

In the EP-N cartridge, a magnetic blade as shown in FIG. 1 was used. At this time, the gap between the sleeve surface and the magnetic blade is 200 μm
Fixed to. A 20% by weight methanol solution of a nylon resin was prepared and used as a resin liquid D. Next, silicone resin 2
40 parts by weight of graphite and 30 parts by weight of conductive tin oxide fine powder were added to 100 parts by weight of a 5% by weight n-hexane solution, and dispersed by a sand mill to prepare a dispersion E.

An aluminum cylindrical tube was set up on a turntable in the same manner as in Example 1, and the turntable was turned while determining the coating position by applying masking jigs to both ends, and the resin solution D was sprayed on the turntable using a spray gun. Was used to coat an aluminum cylindrical tube. At this time, the thickness of the first resin layer was about 2 μm. After the heating and drying, this was placed on a turntable again, and the resin liquid E was applied by the same method. Then, it was heat-cured to complete the formation of the second resin layer. The thickness of the second resin layer was 9 μm. Next, the same evaluation as in Example 1 was performed using the toner and the developing device. The results are shown in Figure 8 and Table 1.

Example 6 Next, the sleeve evaluated in Example 5 was removed from the developing device, the toner was removed by air, the sleeve was immersed in methanol, and the resin layer was wiped off. And this 3
Repeatedly, the resin layer on the aluminum cylindrical tube was completely peeled off. Next, a resin layer was formed in exactly the same manner as in Example 5, and the same evaluation was performed. FIG. 9 and Table 1 show the results.
Shown in

Example 7 A resin solution was prepared by dispersing phenol resin in resin solution B in an amount of 100 parts by weight, graphite in 50 parts by weight, and carbon black in 5 parts by weight. This was designated as resin liquid F. A sleeve was prepared in the same manner as in Example 5, except that the resin liquid F was used instead of the resin liquid E. At this time, the thickness of the first resin layer was 3 μm, and the thickness of the second resin layer was 12 μm. Next, the same evaluation as in Example 5 was performed. The results are shown in Figure 1 0, and Table 1.

Example 8 Next, the sleeve evaluated in Example 7 was removed from the developing device, the toner was removed by air, the sleeve was immersed in methanol, and the resin layer was wiped off. And this 3
Repeatedly, the resin layer on the aluminum cylindrical tube was completely peeled off. Next, a resin layer was formed in exactly the same manner as in Example 7, and the same evaluation was performed. This result 1 1 and Table 1
Shown in

Comparative Example 1 Resin liquid B in Example 1 was directly applied to an aluminum cylindrical tube by the same apparatus as used in Example 1. The thickness of the resin layer was 10 μm. This was mounted on the developing machine of Example 1 and evaluated in the same manner as in Example 1. The results are shown in Figure 12 and Table 2. As shown by these results, the image performance was almost the same as that of Example 1. However, the film does not peel off when immersed in xylene.

Comparative Example 2 The surface of the aluminum cylindrical tube used in Example 1 was roughened by sandblasting using Alundum # 400 abrasive grains. This was mounted on the developing machine used in Example 1, and
Evaluation was performed in the same manner as in Example 1. FIG. 13 and Table 2 show the results.
Shown in

Comparative Example 3 The resin liquid F of Example 7 was directly applied to an aluminum cylindrical tube in the same manner as in Example 5. The thickness of the resin layer was 15 μm. This was mounted on the developing machine used in Example 5 and evaluated in the same manner as in Example 7. Figure 1 shows the results
4 and Table 2. As shown by these results, the image performance was almost the same as that of Example 7. However, the film does not peel off when immersed in methanol.

Comparative Example 4 The aluminum cylindrical tube used in Example 7 was roughened by sandblasting using Alundum # 400 abrasive. This was mounted on the developing machine used in Example 5 and evaluated in the same manner as in Example 7. The results are shown in Figure 15 and Table 2. In Tables 1 and 2, ◎ indicates no ghost at all, ○ indicates very little but not bothersome, ○ △ indicates a level that does not cause any practical problem,
Δ indicates a practical lower limit, × indicates a level lower than the practical level, and XX indicates a very bad level.

4 to 15 , the 5 ° image density is a value obtained by measuring a 5 mm square, solid black image pattern with a Macbeth reflection densitometer. Also, when the image density of the solid black pattern on the entire surface was measured, it showed a value almost equal to 5 ° density, and the tendency of density transition was similar.

[0051]

[Table 1]

[0052]

[Table 2]

[0053]

As described above, by forming an image using the developer carrying member of the present invention and a developing device using the same, there is almost no charge-up phenomenon or sleeve ghost, and a large number of continuous copies can be obtained. It is possible to obtain an image with little change in image density at the time. Further, a stable image can be supplied even when the environment changes. Furthermore, the developer carrier used once can be recycled and used,
It can contribute to environmental protection. Further, even when the regenerated developer carrier is used, it is possible to provide a good image equivalent to a non-recycled product.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a developing device configured according to the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the developing device of the present invention.

FIG. 3 is a configuration diagram showing still another embodiment of the developing device of the present invention.

FIG. 4 is a diagram showing evaluation results in Example 1.

FIG. 5 is a diagram showing evaluation results in Example 2.

FIG. 6 is a diagram showing evaluation results in Example 3.

FIG. 7 is a diagram showing evaluation results in Example 4.

FIG. 8 is a diagram showing evaluation results in Example 5.

FIG. 9 is a diagram showing evaluation results in Example 6.

FIG. 10 is a diagram showing evaluation results in Example 7.

FIG. 11 is a diagram showing evaluation results in Example 8.

FIG. 12 is a diagram showing evaluation results in Comparative Example 1.

FIG. 13 is a diagram showing evaluation results in Comparative Example 2.

FIG. 14 is a diagram showing evaluation results in Comparative Example 3.

FIG. 15 is a diagram showing evaluation results in Comparative Example 4.

[Explanation of symbols]

 1: image carrier 2, 20: doctor blade 3: developer storage chamber 4: one-component magnetic toner 5: multi-pole permanent magnet 6: metal cylinder 7: coating layer 8: sleeve

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazunori Saiki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-5-296228 (JP, A) JP-A-1 −99072 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 13/08-13/095 G03G 15/08-15/095 F16C 13/00

Claims (9)

(57) [Claims] 1. A first resin layer containing a resin soluble in at least a selected organic solvent on a metal cylinder, and a second resin layer on which a triboelectric charge can be given to a developer. Is formed in the first resin layer.
Was impregnated and washed to have resin dissolvable organic solvent is, after peeling and removing the first resin layer and the second tree fat layer, on the cylindrical made of the obtained metal, again, at least selected a first resin layer containing a resin soluble in an organic solvent to form the, by the forming at least triboelectric charging resin material layer to the developer thereon as the second resin layer
And regenerating the developer carrying member. 2. A second resin layer before regenerating and a second resin layer after regenerating.
In any of the second resin layer, a method of reproducing the developer carrying member according to claim 1 conductive fine powder and / or solid lubricant that contained. 3. The first resin layer before being regenerated and the resin layer after being regenerated.
In any of the first resin layer, a method of reproducing the developer carrying member according to claim 1 or claim 2 conductive fine powder is Ru <br/> contained. 4. A developer carrier before regenerating and a regenerated developer
The developer carrying member are both longitudinal coat width of the developer carrying member of the Kazuki fat layer is larger than the coating width of the second resin layer, the second Kazuki fat layer exposed on the surface at both ends regions The method for regenerating a developer carrier according to claim 1 . 5. A Metal made cylindrical on, first of at least a first resin layer containing the selected organic solvent-soluble resin, can triboelectric charging to the developer formed thereon a developer carrying having at least a resin layer made of a two <br/> resin layer
The body can dissolve the resin in the first resin layer
Impregnated with organic solvent and washed, peel off the resin layer
After removal, place again on the resulting metal cylinder,
First tree containing resin soluble in selected organic solvent
Forming a lipid layer, thereon, friction against least a developer
When a resin layer capable of imparting triboelectricity is formed as a second resin layer,
A regenerated developer carrier regenerated by a raw method,
The recycled developer carrier is at least selected on a metal cylinder.
First resin layer containing resin soluble in selected organic solvent
And a second tree on which a triboelectric charge can be applied to the developer.
Play developer carrying member, wherein Rukoto and fat layers are formed. 6. A developer carrier before regenerating and a regenerative developer
Image-carrying member are both in the second resin layer, reproducing developer carrying member according to claim 5, the conductive fine particles and / or solid lubricant is contained. 7. A developer carrier before regenerating and a regenerative developer
Image-carrying member, any, the first resin layer, reproduction <br/> developer carrying member according to claim 5 or claim 6 conductive fine powder is contained. 8. A developer carrier before regenerating and a regenerative developer
Image-carrying member are both longitudinal coat width of the developer carrying member of the Kazuki fat layer is larger than the coating width of the second resin layer,
Developer carrying member according to claim 5 in which the first Kazuki fat layer is exposed to the surface at both ends regions. 9. A developer carrying a one-component developer contained in a developing container on a developer carrier, and forming a thin layer of developer on the developer carrier by a developer layer thickness regulating member. A developing device that transports the developer to a developing unit facing the latent image carrier by the developer carrier and develops the latent image formed on the latent image carrier; The recycled developer according to any one of claims 5 to 8.
A developing device, which is a carrier .