JPS60225865A - Image recording device - Google Patents

Abstract

PURPOSE:To obtain a copy image of high picture quality stably by providing a toner image forming means which is not slided and rubbed against the surface of an image support and means which supplies a stabilizing agent for stabilizing characteristics of the image support on the surface of the image support. CONSTITUTION:A photosensitive body 40 is constituted by providing a selenium- tellurium photosensitive layer 43 to the outer peripheray of a metallic drum 42 and the photosensitive layer 43 is coated with a powder layer 44 of copper stearate as the stabilizer by a stabilizer supplying device 30. An electrostatic image is developed by the developing drum 71 of a developing device 70 without contacting. A developer D is attracted to the surface of a sleeve 73 with the magnetic force of a magnet body 72 and conveyed to a developing area A according to the turning of the sleeve 73 to form a magnetic brush of the developer D on the surface of the sleeve 73 with the magnetic force of the magnet body 72, and the brush is controlled by a film thickness control member 74 set to a gap of 350mum from the surface of the sleeve 73 to form a thin developer layer on the surface of the sleeve 73.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to i[!
This invention relates to improvements to the l1g1R recording device.

[Prior art]

2. Description of the Related Art In conventional image recording devices that utilize static electricity, photoreceptors containing photoconductive semiconductors are often used.

Such photoreceptors include, for example, photoreceptors in which powders such as zinc oxide or cadmium sulfide are dispersed in a binder resin, photoreceptors in which selenium containing tellurium arsenic or antimony is vapor-deposited, and silicon formed by glow discharge decomposition, sputtering or vapor deposition. Examples include amorphous 7A silicon photoreceptors, organic photoreceptors coated or vapor-deposited with organic semiconductors, and the like.

Further, as an image forming apparatus incorporating such a photoreceptor,
For example, electrophotographic copying machines are known, and FIG. 1 shows a sectional view of a typical copying machine. In FIG. 1, a platen cover 2 for pressing an original (not shown) onto an original table glass plate 3 fitted into the main body 1 is arranged at the upper part of the main body 1 of the copying machine. The platen cover 2 includes a cover plate 2a, a rubber plate 2b on the lower surface, and a handle 2c.

Inside the main body 1, there is a drum-shaped photoreceptor 4 that rotates in the direction of the arrow, a charger 5, a scanning optical system 6, a developer 7,
A transfer electrode 8, a molecule li, an electrode 9, a cleaning brush, etc. are arranged.

A uniform electrostatic charge is applied to the surface of the photoreceptor 40 by the charger 5, and then imagewise exposure is performed by the scanning optical system 2 to form an electrostatic charge image on the surface. The optical system 2 includes a first mirror unit 6a that includes an exposure lamp and a reflection mirror, a second mirror unit 6b that moves relative to the mirror unit 6a to keep the optical path length constant, an imaging lens 6e, and It consists of a reflecting mirror 6d.

The electrostatic charge image formed on the surface of the photoreceptor 4 is powder developed by a magnetic brush developer 7 to form a toner image.

The toner image is transferred by a transfer electrode 8 onto a transfer paper P that is conveyed from a cassette 11 by a paper feed roller 12 and a conveyance roller 13 at the same timing. The transfer paper P carrying the transferred toner image is separated from the surface of the photoreceptor 4 by the action of the separation electrode 90, transported by the transport section 14, and transferred to the fixing section 1.
5, the paper is fixed on a heat roll and discharged onto a paper discharge tray 16.

On the other hand, since untransferred toner and static charges remain on the surface of the photoreceptor 40, the remaining toner and charges are removed by the cleaning blade 10m, cleaning lamp 10b, etc. of the cleaning section 1o.

In an electrophotographic copying machine or the like, copying operations are performed by repeating the image forming process many times in succession, so that the photoreceptor 4 or the seed is transferred from the process equipment.

It deteriorates under the action of the tower, and the image quality of the copies that are made begins to deteriorate. The deterioration effect on the photoreceptor 4 includes, for example, the charging electrode 5, the transfer electrode 8, and the #Il&electrode 9.
electric shock effects such as; chemical effects of active species generated from the various electrodes; photodecomposition effects due to the irradiation light from the optical system 2 and the cleaning lamp 10b, etc.

Furthermore, mechanical friction caused by the developing device 7, cleaning blade 101, etc.; coating of the photoreceptor surface with fused toner;
There is also the effect of heating by theorem 15; humidity of the outside air, etc. These effects act independently or synergistically to deteriorate the photoreceptor 4.

For example, the surface layer of the photoreceptor 4 undergoes a chemical change and undergoes deterioration or crystallization due to the above-mentioned action.

It also causes mechanical wear damage and toner filming. As a result, the electrostatic properties of the photoreceptor change, resulting in, for example, a decrease in potential, a delay in the optical decay period, or an increase in residual charge. Such changes in the electrostatic properties of the photoreceptor 4 appear on the copied image as a decrease in density, occurrence of capri, or decrease in photosensitivity, and furthermore, white streaks, black streaks, spots, or image blurring occur. Become.

Therefore, in order to always obtain stable copy images with a copying machine, measures to prevent the deterioration of the characteristics of the photoreceptor 4 are extremely important. For example, JP-A-57-97
Japanese Patent No. 572 proposes a method in which precious metal pieces such as silver or copper are rubbed off with a cleaning brush and adhered to the surface of a photoreceptor. In the method described in the publication, when cleaning the residual toner by rubbing the surface of the selenium-based photoreceptor with a cleaning brush, pieces of precious metal such as silver or copper are scraped off with the fludge, and the scraped powder is applied to the photoreceptor. I'm trying to make it stick. The attached metal powder is
When incorporated into the photoreceptor, the noble metal element begins to block dangling bonds (a state in which bonds remain broken), which is a cause of instability of the photoreceptor. It is described that this prevents crystallization and deterioration of the amorphous selenium thread semiconductor constituting the selenium-based photoreceptor.

Also, JP-A-46-5782, JP-A-48-47345
, JP-A-48-47346, JP-A-58-132757
In each of the publications, silicon dioxide particles are reacted with a silane cassoplating agent such as dimethyldicyclosilane or octylchlorosilane to obtain hydrophobized silicon dioxide, and this is added to the developer toner. It has been proposed to use a mixture of weights of .01 to 15. In this way, in a copying machine using a selenium-based photoreceptor or an organic photoreceptor, wear and damage during cleaning of residual toner on the photoreceptor can be reduced, resulting in reduced image quality, black streaks, white streaks, etc. It is stated that the occurrence of is prevented.

As the means for applying the stabilizer described in the above publication, the photoreceptor 4
In the former case, the stabilizer is applied to the surface of the photoreceptor 4 by mechanical application means, and in the case where the stabilizer is mixed into the developer and applied to the surface of the photoreceptor 4 through the developer. However, in the former case, a magnetic brush developing device that rotates at high speed is generally used. 1li7 allows much of the stabilizer to be scraped into the developer and mixed with the developer. For this reason, the amount of stabilizer consumed becomes excessive.1 In addition, the stabilizer impairs the fluidity, friction, and mold retention of the developer, resulting in a decrease in developability. Furthermore, since the surface of the magnetic brush is extremely uneven, the stabilizer is rubbed away in streaks, and the surface of the photoreceptor 40 has a streak-like unrestricted layer, resulting in white streaks or irregularities on the copied image. Black streaks, etc. begin to appear.

On the other hand, in the latter case, since the stabilizer is mixed into the developer from the beginning, it has a greater influence on the developer. In other words, during the flow of the developer, the surface of the developer particles is coated with the stabilizer, which improves the fluidity of the developer.
In addition to charge controllability, developability, etc., the transfer characteristics of the toner image onto the transfer paper also deteriorate. Further, as the copying period becomes longer, the stabilizer adheres to the inner wall of the developing device, comes into contact with the developer, and deteriorates the quality of the developer. Further, the stabilizer is applied to the photoreceptor 4 using a magnetic brush or the like, but since the surface of the magnetic brush is extremely uneven, a non-uniform layer of the stabilizer is formed on the surface of the photoreceptor 4. , copy li! ! It causes white streaks, black streaks, etc. to occur in II. The above description has been made regarding an image recording device using a photoreceptor containing a photoconductive semiconductor as an image support, but an image recording device using a dielectric material mainly composed of a polymer compound with a low dielectric constant, such as a resin. The same is true for .

[Object of the Invention] The present invention has been proposed in view of the above-mentioned circumstances, and its purpose is to prevent the surface of the image support from having an adverse effect on the development characteristics of the developer, the transfer characteristics of the toner image, etc. It is an object of the present invention to provide an image recording apparatus that can form a uniform thin layer of a stabilizer on the surface of the image support without any problems, thereby stably producing high-quality copy images.

[Structure of the invention]

The above object is an image recording apparatus provided with a toner image forming means that does not substantially rub the surface of an image support, and a means for applying a stabilizer to stabilize the characteristics of the image support.
and a toner image forming means that does not substantially rub the surface of the image support, a cleaning means that rubs the surface to remove residual toner, and a stabilizer that stabilizes the characteristics of the image support. An image recording apparatus provided with a means for applying the stabilizer, preferably an image forming apparatus in which the means for applying the stabilizer is provided between the marking means and the means for forming the toner image. .

A further feature of the present invention is that the stabilizer is mechanically and uniformly applied to the surface of the image support by a stabilizer applying means prior to the toner image forming means, and that the stabilizer is applied uniformly to the surface of the image support by a subsequent toner image forming means. In other words, until the cleaning means that requires rubbing the image support surface is reached, the image support surface is not substantially rubbed. The point is that I tried not to do that. Note that the stabilizing side applying means may be provided before charging, before agricultural lighting, or before toner image formation. If rubbing is performed in the process before the cleaning means, the stabilizer that has been rubbed off may scatter and adhere to various electrodes, reducing their performance, or, especially in the case of a developing device, may be mixed into the developer. Problems such as deterioration of developability occur.Also, since the rubbing surface is uneven, an uneven layer of stabilizer is formed on the surface of the image support, resulting in uneven development and uneven transfer. Even if the trap is stored and the non-uniform layer is cleaned later by a cleaning means, the non-uniform layer cannot be removed, and this will cause problems even in the next image formation.

The stabilizers used in the present invention will be explained item by item below, but the stabilizers are not limited thereto.

(a) For the purpose of preventing crystallization of the selenium thread photoreceptor and improving moisture resistance, a noble metal or alloy of Group 1 of the Periodic Table or a compound containing the noble metal element is used. Precious metals include copper, silver, and alloys thereof, and alloys with other metals or nonmetals, such as gold, platinum, phosphorus, silicon, zinc, aluminum, tin, and the like. These precious metals or alloys may be formed into a uniform film, plate, roll, etc. and supported so as to come into contact with the surface of a photoreceptor, or the tip of a faplash used as a cleaning means for a copying machine may be coated with the metal powder. It is supported in contact with the surface of the image support. Further, the negative metal or alloy may be adhered by electroplating, vaporization, fusion, or in the form of powder, and is brought into contact with the surface of the photoreceptor through a fabric brush to form a thin layer of powder on the surface.

Next, as the compound containing the noble metal element, an organic acid salt of the noble metal element is used.

Examples include stearate, caprylate, pelargonate, myristate, etc. of silver or copper.

These are applied in powder form or as a solution with a sponge roll, brush, rotating brush, pad, etc. to form a thin layer of powder or uniform compound on the surface of the photoreceptor.

(b) Next, an organometallic compound is used for the purpose of blocking the localized level that becomes a destabilizing factor in the amorphous silicon thread photoreceptor, improving its photoconductive properties, and improving the copy image quality. The organometallic compound is a compound having a carbon-metal bond, such as an ionic bond such as CsH;
Examples include child-deficient conjugates, σ-conjugates such as (CH3)4Ti i7), and π-conjugates such as Fe (C5H5)+. Among these, those that are particularly effective include Group nTA, Group 1 VA, Group VI of the periodic table.
There are π-complex compounds having d-block transition metals such as Group A, Group IIA, Group II, and Group IB.

For example, in addition to Fe(CsHs)2, Fe(Cs'
Hs ) (CHs COCs Ha ), Fe4 (■
)4(Cs Hs )2 , Fe (CO)s (C
4H4), Fe(CoHy)z, Fe(CsHs)
CC5Ha a(O) , Fe (CsHs) (CH
sC8H4), Ti(C5H5)2. Ti(Cs(
CHs)s)z, N1(CIIHs)z.

Ni (C8H12)2, Ni (C4H7)2, N
i (Cs Hs ) (C3H5), Co (CsH
s ) (1,5-C3HI2), Co (Cs Hs
Cl(ct2)(CsHs), CoIl
(C5H5) (N C3H5), etc.

E and VC are hismuth, chromium, manganese, molybdenum,
There are organometallic complexes such as tungsten, copper, palladium, gold, platinum, and silver, and there are also Zn (C2H5)2, Z
n (Cs Ha)2, AI ((4Ha)i, AI(
CsHs)a, Cr (CH3)4, Cr (CsHs
)2, Cr(CO)a, Co2(CO)R
1Co(C5Hs)2, Co(CsHs)s,
Fe(Co)B, Ni(CO)4, etc. can also be used.

The organometallic compound may be rubbed onto the surface of the photoreceptor by supporting a block of hardened compound powder with a support member, or it may be applied in powder form or as a solution to the surface of the photoreceptor using a sponge roll, a brush, a rotating brush, a bat, etc. death,
A powder or a thin layer of homogeneous compound is formed.

(c) Next, hydrophobic silica is used to improve the cleaning performance of commercially available photoconductors in general, especially organic photoconductors and selenium thread photoconductors, as well as to prevent damage to photoconductors caused by cleaning members and deterioration of copy image quality. is used. The hydrophobic silica is an organosilicon compound with a silanol group on the particle surface of colloidal silica, such as dimethyl dichlorosilane,
Trimethylchlorosilane, methyltrichlorosilane, methyltriethoxysilane, octyltrichlorosilane,
Decyltrichlorosilane, nonyltrichlorosilane, dibentyldichlorosilane, trihexylcurulsilane, etc. are reacted to bond organic silicon groups to silicon atoms on the surface of the silica particles via oxygen atoms.

The hydrophobic silica is extremely important because it has both the function of scraping off toner remaining on the photoconductor and the function of alleviating damage to the photoconductor caused by the cleaning member. Normal diameter is 10 x 10” to 1000 x 10”μ
A block is formed by hardening hydrophobic silica in the form of a white fine powder of 50 m, and the solid block is supported by a support member whose one end is fixed to the main body of the copying machine, and the tip of the block is brought into contact with the surface of the moving photoreceptor and rubbed. A thin layer of the powder is formed on the surface of the photoreceptor by applying hydrophobic silica powder using a roller, roller, flange, pad, etc.

(d) Next, for the purpose of improving the electrostatic properties and moisture resistance of the photoreceptor obtained by dispersing a compound semiconductor such as zinc oxide or cadmium sulfide in a binder resin, a liquid or solid compound semiconductor such as the following general formula silicon compounds are used.

General ceremony! (Here, R and R2 are hydrogen atoms, alkyl groups, alkoxy groups, and aryl groups; 21 is 10 to 1000) To apply the silicon compound to the surface of the photoreceptor, silicone oil or silicone oil is impregnated into felt or shondji. The m-layer is formed on the surface of the photoreceptor by coating or rubbing solid wax, which is a type of silicone compound.

Next, as other stabilizers, for example, for the purpose of preventing fatigue deterioration of the organic photoreceptor due to ultraviolet rays or ozone, for example, an ultraviolet absorber Tinuvin (benzotriazole derivative) or an antioxidant is used.

As a conventional method for forming an electrostatic image, for example, a uniform electrostatic charge is applied to the surface of the photoreceptor by a brush charging method, a corona discharge charging method, a charging method using an alternating current electric field, etc., and then imagewise exposure is performed. There is a method of forming an electrostatic charge image. Further, imagewise charging is performed on the surface of the dielectric material using a letter electrode, needle electrode, etc., or imagewise charges previously formed on another support are electrostatically charged. There are methods of forming an electrostatic charge image by electrostatic transfer by induction or by irradiating an ion stream through a screen electrode. Since most of these methods are non-contact electrostatic charge image formation methods, the stabilizing agent may be applied anywhere after cleaning and before toner image formation, but it may be applied to the surface of an image support such as a photoreceptor or dielectric. When using a brush charging method in which the brush is rubbed against the surface of the surface of the surface of the surface, the stabilizing agent is preferably provided downstream of the brush for charging.

Next, toner image forming means include, for example, a cascade development method, a magnetic brush development method, a non-contact development method in which the developer is ejected by alternating voltage, and a powder mist development method. In the present invention, development methods in which the surface of the image support is rubbed, such as a cascade development method and a magnetic flage development method, are excluded. However, even in the magnetic brush development method, if the image support surface and the magnetic brush surface run in the same direction on the developing surface and the brushes run at the same speed, the image support surface will not be substantially rubbed. Therefore, it is included in the present invention. Particularly, as a developing method preferably used in the present invention, there is a method in which the developer is caused to fly using the alternating voltage as described above, and the development is performed without contact. Such developing methods are described, for example, in U.S. Pat.
It is stated in the specification etc.

Next, there is a means for transferring the toner image, examples of which include evaporative discharge transfer, roller transfer, and adhesive transfer.

Next, there is a cleaning means for cleaning the surface of the image support.

The cleaning means includes a blade, a fabric brush, a magnetic brush, a wave, etc., which rub the surface of the image support to clean the residual toner, and any of these can be used in the present invention. Rubber flades such as urethane rubber and butylcom are prized because they cause relatively little damage to the surface of the image support and enable uniform cleaning.

The stabilizer applying means is provided between the cleaning means and the toner image forming means, but is usually provided between the cleaning means and the electrostatic image forming means. As described above, the stabilizer applying means of the present invention includes supporting each stabilizer in the form of a solid, powder, or solution by supporting members suitable for each type of stabilizer, and coating the stabilizer on the surface of the image support to form a thin layer. .

The image support according to the present invention is a photoconductor using a photoconductive semiconductor such as a binder type photoconductor of zinc oxide or cadmium sulfide, a selenium thread photoconductor, an amorphous silicon photoconductor, an organic photoconductor, etc. Alternatively, there are PIP type photoreceptors in which an insulating layer is provided on the photoreceptor, and these are put into practical use as image supports for ordinary electrophotographic copying machines.

Further, as described above, the present invention can also be applied to an electrostatic recording device in which the image support is made of a dielectric material and is imagewise charged by a character electrode or a needle electrode.

In Zara, a magnetic material in which magnetic powder is dispersed in a binder resin is used as an image support, a magnetic signal is applied to the magnetic material to form a magnetic latent image, and the latent image is transferred to a magnetic developer. It can also be applied to a magnetic recording device of the type that develops the image using a method.

As a developer for toner image formation, powdered bait developer, developer agent consisting of magnetic toner, and the like are disclosed in Japanese Patent Application Laid-Open No. 55-18656.
A one-component developer described in Japanese Patent Application Laid-open No. 58-57446 may be used, or a two-component developer comprising a carrier and a magnetic toner as described in Japanese Patent Application Laid-Open No. 58-57446.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 2 is a sectional view of essential parts of an electrophotographic copying machine explaining this embodiment. In the figure, 20 is the cleaning section on the surface of the image supporter that removes WLw.
L pole 21 and cleaning equipment! It consists of 122. 3
0 is a stabilizing side imparting device according to the present invention, 40 is the image support and is a selenium-tellurium photoreceptor, 50 is a corona zone tW, 6o
70 is a developing device, 80 is a bias power supply, 90 is a Masako device.
Reference numeral 100 indicates a transfer and separation device for the transfer paper P, and 100 indicates a sticker fixing device.

The photoreceptor 40 includes a metal drum 42, an intermediate layer provided on the outer periphery of the metal drum 42 if necessary, and a selenium-tellurium photosensitive layer 43. On the photosensitive layer 43, a powder layer 44 of copper stearate as a stabilizer is applied to a thickness of, for example, 0.1 to 100 μm by a stabilizing side applying device 30, which will be described later. The photoreceptor 40 has a surface speed of, for example, 150 mw around the axis 41.
/s! It rotates in the direction of the arrow at c, a uniform electrostatic charge is applied to its surface by the charger 50, and then it is imagewise exposed to image light M60 to form an electrostatic charge image. The electrostatic charge image is developed by the developing drum 71 of the developing device 70 in a non-contact manner as described later. The developing drum 71 has a magnetic body 7 that rotates in the direction of the arrow (clockwise) at, for example, 700 r, p, m.
2 and its outer circumference in the direction of the arrow (counterclockwise), for example, 5
The sleeve 73 is made of a non-magnetic material such as aluminum and rotates at 0 r, p, m.

On the other hand, the toner T in the hopper 78 of the developing device 70 is quantitatively replenished into the developer reservoir 76 by the supply roller 79, and mixed with the developer reservoir by the stirring screen 77. Here, the developer is made of fine ferrite and resin having a weight average particle size of 30 μm and 30 emu/H, for example,
A two-component developer consisting of an insulating resin-dispersed carrier having a specific resistance value of about 1×10 14 Ω and an insulating non-magnetic toner having a weight average particle size of 13 μm is used.

The developer D&D is applied to the sleeve 7 by the magnetic force of the magnet body 72.
3 surface, and is conveyed to the developing area A as the sleeve 73 rotates. The surface of the magnet body 72 has N magnetized to a magnetic flux density of 500 to 1500 Gauss, for example.
, S alternate magnetic poles are arranged at equal intervals, and the magnetic force of the magnetic poles forms a magnetic brush containing developer on the surface of the sleeve 73. The magnetic brush is located between W and the surface of the sleeve 73.
! Since the developer layer is regulated by the film thickness regulating member 74 whose thickness is set to 35 .theta..mu.m, a very thin developer layer is formed on the surface of the sleeve 73.

On the other hand, a bias voltage is applied to the sleeve 73 from a bias power supply 82 via a protective resistor 81.

For example, 150
A superimposed voltage of a positive DC voltage of 500 volts and an AC voltage of 500 volts at I KHz is applied to the sleeve 73.
An oscillating electric field is generated between the surface and the surface of the photoreceptor 400.

In the development area A, the gap d between the surface of the sleeve 73 and the surface of the photoreceptor 40 is set to be 750 μM. During this period, the toner T flies onto the surface of the photoreceptor 400 by the action of the vibrating wheel field from the developer layer, which has been previously regulated to a thickness of approximately 350 μm by the film thickness regulating member 74, through IJd, and the surface of the photoreceptor is Electrostatic charge images can now be developed without contact. Here, the developer layer after completion of development is scraped off by a scraper 75 and collected into a developer reservoir 76.

A toner image is formed on the surface of the photoreceptor 40 by the developing device 70, and the toner image is transferred to the transfer paper P by the transfer device 1190. The toner image is electrostatically transferred by a transfer electrode 93 onto a transfer paper P that is sent out at the same timing from a cassette (not shown) and transported by a transport roll 91 and a guide 92 . The transfer paper P carrying the transferred toner image is transferred to the photoreceptor 40 by a separation type [, 94].
The scaffold is separated from the surface of the substrate, guided by a guide 95, fed into a scaffolding device 100, and heated by a heating roll 101 and a pressure roll 102.

After the toner image has been transferred, charge and toner remain on the photoreceptor 4o, so the photoreceptor 4o is cleaned by the cleaning section 20. 2
1 is an electrode for erasing residual charges, 22 is a residual toner cleaning device, and a cleaning blade 2
3, a toner collection plate 25, and a screw 24 for discharging the collected toner.

Most of the residual toner and a part of the stabilizer on the surface of the photoreceptor 400 are scraped off by the cleaning blade 23 and discarded without being recycled.

A stabilizer (copper stearate) 31 is applied to the surface of the photoreceptor 40 cleaned by the cleaning section 20 by the stabilizing side applying device 30 of the present invention. 32 and 33 are stirring devices for stirring the stabilizer 31, and 34 is a coating roll that rotates gently in the direction of the arrow to coat the stabilizer layer 44.
is formed. Of course, the application roll may rotate in the direction opposite to the direction of the arrow, and there are no particular limitations on the rotation direction or rotation speed.

The copper stearate used in the stabilizer layer 44 not only improves the cleaning properties of the cleaning blade, but also improves moisture resistance by doping copper ions and blocking localized units of the amorphous selenium semiconductor. I can do it.

In this embodiment, since the stabilizer is not rubbed off from the surface of the photoconductor 400 by the toner image forming means during development, the stabilization can be performed without contaminating the electrodes or reducing developability. The effect of the agent can be fully demonstrated. Note that the stabilizing north side applying roller 34 may be in constant contact with the photoconductor 40, but it may also be in contact to apply the stabilizing agent only during preliminary rotation of the photoconductor 40 before copying or every certain number of copies. . Also, when not copying, the roller 34
It is desirable to evacuate to a non-contact position.

In the present invention, the specific resistance of particles such as carrier and toner is measured by the following method. That is, after placing the particles in a container with a cross-sectional area of 0.50 ad and tapping, a 1 exposure force load is applied to the packed particles, and an electric field of 102~'■/cIn is created between the load and the bottom electrode. The specific resistance is calculated from the reading of the current value when the resulting voltage is applied. The weighted average particle diameter is measured using a Coulter Counter (manufactured by Coulter).

(Experiment example) The developing device i70 equipped with the bias power supply 80 shown in FIG. After continuous copying under 80 degrees of high temperature and high humidity,
I was able to browse up to 1 sooo high quality copies.

(Comparative Experiment Example 1) On the other hand, except for excluding the stabilizing side imparting device 30,
When copies were made using U-Bix 3000 in the same manner as in the experimental example, the surface of the photoreceptor changed color and crystallization was observed from around 9000 copies, resulting in a decrease in image density, capri, and
and the appearance of spots became observed.

(Comparative experiment fl12) U-Bix3000 was manufactured in the same manner as in the experimental example except that a conventional contact type magnetic brush developing device was used in place of the developing device 70.
When copies were made, a large number of striped patterns began to appear overall from around 10,000 copies.

〔Effect of the invention〕

As is clear from the above description, in an image recording apparatus, there is a toner image forming means that does not substantially rub the surface of the image support, a means for cleaning the residual toner by rubbing the surface of the image support, and an image support. By providing a means for applying a stabilizer to the surface of the image support, it is possible to improve the rough characteristics of the surface of the image support without impairing the charge controllability, fluidity or developability of the developer. For example, the effect of improving the photoconductivity, atmospheric properties, cleaning properties, abrasion resistance, moisture resistance, and other physical properties of the surface of the image support can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional electrophotographic copying machine, and FIG. 2 is a sectional view of essential parts of an inventive electrophotographic copying machine. 20...Cleaning section 22...-Flade cleaning device 30...
Stable north side imparting device 31... Stabilizer (copper stearate) 32, 33
... Stirring device 34 ... Application roll 40 ...
...Film light body tram (senndeluru) 44...Stabilizer layer 70...Developing device 71...FJL image drum 74...Film thickness regulating member 80...
... Bias power supply 82 ... AC and DC power source agent Patent attorney No. 1) Amendment to parent-in-law procedure dated July 8th to 8th, 1982 Manabu Shiga, Commissioner of the Patent Office, Patent Application No. 83097 of 1983 2. Name of the invention Image recording device 3. Relationship with the person making the amendment Patent applicant address 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Name (1)
27) Roku Konishi Photo Industry Co., Ltd. 4, Agent 191 Address: 1-6 Sakura-cho, Hino-shi, Tokyo, "Detailed Description of the Invention" column of the specification to be amended. 7. Contents of the amendment (1) [Formation] on page 3, line 3 of the specification is corrected to “recording”; (2) “Photosensitivity” on page 5, line 17 of the specification is corrected to “sensitivity”. , (3) Delete "Charging method using alternating current electric field" on page 16, line 13 of the specification; (4) Correct "surface" to "on the surface" on page 19, line 1 of the specification; (5) "Transfer," on page 20, line 13 of the specification was corrected to "transfer and." (6) "Set film thickness" on page 22, line 7 of the specification was changed to "from the set magnetic material." (a) On page 24, line 6 of the specification, ``Disposal J'' is corrected to ``discard''.

Claims (1)

[Scope of Claims] (1) On the surface of the image support, a toner image forming means that does not substantially rub the surface and a means for applying a stabilizer that stabilizes the characteristics of the image support are provided. An image recording device characterized by: (25) The image according to claim 1, wherein the means for forming the toner image is a developing device that develops without contacting the surface of the image support, or a developing device that does not have a substantial relative speed with the image support. Recording device. (3) The image recording device according to claim 1 or 2, wherein the stabilizer applying means is provided before a means for forming a toner image. (4) On the surface of the image support , a toner image forming means that does not substantially rub the surface, and a means for cleaning the surface by rubbing;
An image recording apparatus comprising: means for applying a stabilizer for stabilizing the characteristics of the image support. (5) The image recording apparatus according to claim 4, wherein the stabilizer applying means is provided between the toner image forming means and the cleaning means. (6) The image recording apparatus according to claim 4 or 5, wherein the toner and stabilizer are scraped from the surface of the image support by the cleaning means and are discarded without being reused.