JPS5987471A - Developing device - Google Patents

Abstract

PURPOSE:To improve developing property, to prevent a charging pattern from being leaked and to charge toner to a required charging level repeatedly by covering a conductive sleeve to be used as a developer supporting member with an insulating layer and contacting a discharging member with the surface of the insulating layer. CONSTITUTION:Since AC voltage is applied between a conductive sleeve 3a and a conductive base body 7b, high resistance toner 10 adsorbed and carried on the insulating sleeve 30 is easily attracted into a charging pattern E on a photosensitive body 7. Even if an foreign substance with low resistance is mixed between a part on which the charging pattern E is formed and the insulating sleeve 30, the charge of the charging pattern E is prevented from leakage to a developing roller 3 because the developing roller 3 is covered with the insulating layer 3b. Since the insulating sleeve 30 is contacted with a destaticizing member 9 connected to the conductive sleeve 3a through a resistor 8, the charge G left in the insulating layer 3b every process of development is destaticized to the external through the conductive member 9 and the toner 10 is frictionized and charged always to a prescribed charging level by frictional contact with the insulating sleeve 30.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a developing device that supplies toner to a charge pattern corresponding to an original image formed on a recording medium and converts it into a iiJ visual source. Ru.

[Technical background of the invention and its problems]

The original image device absorbs and stops the toner as dust scraper on the 1-ton sling as a support member of the image agent of the rotating image roller, and removes the original image 1. @! By transporting and supplying a recording medium onto a recording medium on which a charge pattern corresponding to the charge pattern is formed, the charge pattern is compared.

10,000 In this conventional development process, the current state of the recording medium
# When transferring the visible image of the sickle to a transfer medium such as Shin; tl #, the placement of the 7 samurai at commercial humidity is missing Wg lx 4 strokes / i
A toner with a resistance of 1013 Ω·1 or more is used to prevent discharge.

However, when all the crystal resistance toner is used, it is necessary to apply the sieve resistance toner to the desired area in advance, otherwise the development will be difficult, and the contrast of The transferred image quality tends to be uneven due to the unevenness of light shining onto the recording medium and the conductive sleeve. However, in this case, between the recording medium and the conductive sleeve,
When low-resistance foreign matter such as metal gets mixed in, the charge that forms the charge pattern on the recording medium is particularly likely to leak to the conductive sleeve.And white spots appear on the transferred image corresponding to the black solid area of the original image. In order to prevent this charge leakage, some proprietary sleeves have their surfaces treated with resistance or covered with a thin insulating layer; 111. Because the layer accumulates electric charges, it becomes impossible to triboelectrically charge the toner to the new Qζ desired value, resulting in low development density, etc.
Flexion occurs.

['Hakushi no l'HJ]

This book 1 was made in order to eliminate the problems mentioned below, and even in frying using sieve resistance toner, the present situation is 1 - soil is good, and RI: is mixed with 1 female medium and 1 bottle. Even if a low-resistance foreign object gets mixed in between the sleeve that adsorbs and conveys the iC
The electric charge of the electric charge pattern formed on the recording medium does not leak, and furthermore, the toner can be repeatedly charged to a desired charging point by frictional charging with the sleeve.
It is an object of the present invention to provide a developing device in which the developer density does not decrease at i['-).

[Summary of the invention]

The present invention is currently 11! Developer support of the device (1) Forming an insulating sleeve that absorbs and transports the toner by covering it with a cap (I absolutely do not want to use a conductive sleeve as a rip-off) In order to prevent the leakage of loads, and to remove static electricity from the surface of the insulating layer, it is possible to eliminate the charges induced in the insulating layer by the mutual friction between the insulating layer and the toner as an agent. This is what KKN is designed to do.

[Embodiments of the invention]

Next, the present invention will be explained with reference to a central example shown in the drawing.

FIG. 1 is a schematic sectional view of a developing device (1) which is a first embodiment of Akira Hontsubaki. The developing/internal positioning (1) consists of a casing that covers its surroundings, a current 1 value roller (3) and a %t,,'tl family roller (3) which are provided in the casing (2) under rotating self-pressure.
) Doctor blades (4) whose tips are provided at a constant distance 1-11 on the surface are made of four thin sheets. The current 1st row 2 (3) has a cylindrical conductive sleeve (3a) and a 4-color rim made of insulation 1) applied to the surface of this L-shaped sleeve (3a). Add layer (3b) to ingredients 1
wisteria). Then, at the opening of the casing (2), it is brought into close contact with the photoreceptor (force) as a recording medium.
The conductive sleeve (3a) of the current one-stage roller L3) is connected to a power supply source (5) whose one end is grounded, while the sensing element ('/) is connected to its conductive sleeve (3a). The electrical conductor (7b) supporting the electrical conductor (7a) is grounded. Therefore, a voltage is also applied between the photoreceptor (force surface) and the conductive sleeve (3a) of the current 1/seeking roller (3), and the alternating current υ
It turns so that f, ni, and the world (5) work.

Further, the insulating sleeve (%) is contacted with a static eliminator 41 (9) made of a conductive material and connected to the C current Ld source (!3) via a resistor (8). Also casing (2) Domestic politics! , a high resistance toner of, for example, about 1018 Ω or more is stored.

In the developing device (1) configured as described above, first, the developing device 11! As the roller (3) rotates (in the direction of the old arrow), the toner 4 is disturbed. Therefore, the toner θ
When Q and the insulating sleeve (3/c) come into contact, frictional electrification occurs, and for example, a negative charge (D) is induced in toner 0 ('ll), and this toner 00 and 41 rub against each other. A positive charge (C) is induced in the insulating layer (3b) of the insulating sleeve (final).Here, the toner t, 101 is non-6J, t I!
In the case of the toner uQ being triboelectrically charged and the insulating layer (3b), static air blisters or external means act between the toner 0 and the insulating layer (3!3) If the toner θ is made of a magnetic material, the toner IJ4 is transferred to the insulating sleeve by the magnetic force exerted on the toner u by a magnetic roll provided in the developing roller (3). (y) while being adsorbed and transported.

And the toner O is adsorbed to the insulating sleeve (〆).
When the layer I comes into contact with the tip of the doctor blade (4),
The toner (4) is scraped off by the doctor blade (4) and the thickness of the toner (110 layer) is regulated to a predetermined thickness, and then the toner ((e is closely opposed to the photoreceptor (7) .

On the other hand, there are 2 in the figure and 1 in the direction of the arrow 11 [! A photoreceptor that rotates once (for example, a photoreceptor (7) with a uniform charge pattern (0 to 1) of a static charge corresponding to the original image)
and the insulating sleeve (small 6), there is also a 4-electro AT55
), the father-ryu'i world (5) is in effect. For this reason, the toner (11) having a negative polarity that is closely opposed to the photoreceptor (7) is generated in this father flow '1h field (N Due to the influence of Shizuka NU, the visibility of the exercise has been increased to J, and the 1st main sleeve of Lowa-sama (
96) becomes easier to separate from. Therefore, it is easy to say that 1 difference from toner (load pattern + E on L for 1 s) is toner t.
The pattern (E) is made into a usable image (currently) by hitting the iron scraps of the insulating sleeve (it) and the insulating sleeve (only).
)). This developed +1f 4 hat image is transferred to a transfer body of the Hoko Tsushi issue by a transfer means (not shown).

When the developing roller (3) is insulated (3b) after completing this developing process, a tonneau (1) is placed on the photoreceptor (7).
A positive charge is left in the part where 0 is attracted. This positive charge causes the insulating sleeve (,%) to further rotate -C,
Insulation @ (3b) positive iQ, charge 0) remains +il
When it comes into contact with the i-understandable city system (9), a closed circuit is formed by this part of the first tactile layer (3b) and the resistor (8), so
It is discharged at the resistor (8). Se[ is L mentioned υ1
Even if 1st place 1j is repeatedly attacked, the current 1st place is Laura (3
) The positive charge L1) left on the insulating layer (31)) does not accumulate in the insulating layer (3b) and is gradually discharged.

In this way, in the Honjitsu Yama example, Ke1 ``4'Ni,
+'lE sleeve (3a) and photoconductor (7) are insulated due to the pressure applied to the 4-way substrate (71); The red resistance toner L] 0) that is being applied is easily applied to the photoreceptor (7) E.
j Hataan (Nio ni Nyaku Shikireru.

Therefore, the electric charge pattern tE)+ is developed to be as beautiful as -C1, and this is transferred onto a transfer sheet such as hemorrhoid paper (fill f).
A transfer image with good developability can be obtained. Shunta Sensitivity 1 Do (F of Force)
+7. Load 1i1J Rikonato 11 (zu attack (original f4 snout is (
Both I and C, ^11. + Elephant roller (3) is insulating layer (
At the 7th hour, which is different in 3b), the sail di7 of this foreign object all the way through -C ton charge turn ui) lowers the μ tarrolla (3) (4
There is no leakage to the third three-way block (3a).

In other words, does it correspond to the solid black part of the original image? 11
Load pattern (eye'tll, load is recorded in the first snout (
1 was also leaked by a person, and this DC ('J pattern was not developed, and Illbei photos such as Mackerel, II! 1 paper etc.
11jξll when this is transferred to Pire 7hi! This eliminates the problem of white dots appearing in the black solid portions of the ilI image in the portions of the original prints.

Kiriniri l, +v Laura (3) Tate Midori note sleeve (3
'C) is in contact with the electrically conductive sleeve (3a) together with the resistor 18) 'f'jp (static neutralizing material X9), so it is impossible to avoid the current 1"P process tσ (no sacrilege). 3b) rkogorareru@kakuIsu)woyosentt4: ly4已１都['
4' t9), the static electricity is removed externally. Toner 1 again
+ 0+ due to frictional contact with the insulating sleeve (〆),
A predetermined band 1 is frictionally charged in r direction, and even if the current 14 times are repeated, the photoreceptor (the sumo wrestler's charge pattern (1:) K! I! 6. toner + it) M.L.
(The current fault rhi (+current) does not decrease.Also, even if magnetic force is used as the +V feeding means for toner 01, it is still static) and -C is not tightly gripped in this embodiment. , toner (10) is 1. & Consists of 4 ingredients, either pouring or non-magnetic! The above-mentioned effects can be obtained in the same way in the lifting platform.

It should be noted that the present invention is not limited to this 10th) embodiment, and the U-shape of (city) is shown in the 11th example of the town within Φ1) which does not change the gist of the present invention.

Fig. 2 shows the developing device Uυ 11''1 in the second embodiment of the present invention, and Fig. 3 shows the developing device t1) in the r+x3 embodiment of the present invention. uji +Iji diagram/). Gen-1 transvestite bag (11) and modern device (also present in 2υ) '41b: Because the same developing process as in (1) is carried out, in Fig. 2, Fig. 7
By adding No. 1, the explanation thereof will be omitted.

4. The current weaving equipment is 4.1J-3 (
2σ 3/c) Phi 1 resisted by the static eliminator A J(9) that breaks when the PC contacts
□T1 name is grounded by 1゛shi.
a-la (3) lead 'jli: j, '+ sleeve (
:A father current 11 is applied between ua) and the neutralizing member (ε)), and 61u of the father current 11 is applied at 61 minutes of the insulation 1→(3b) where the neutralizing member (9) is in contact. Naru o' [
/E is now 1#! The RL #r N') left on the device (tυ, this insulating layer (:J, l)) is 17
M, appeared in 1st class, 1st view 1: p infix (1), same as 4
．． ) can be 1(△).In addition, by intervening the resistance Cfj, ``?out, 1
The same effect can be obtained even if the material 13 (9) is directly grounded.

In addition, the developing device/υ odor C is static electricity 111N+4(9)
Then, after killing his father, he was turned away by Ryo Naruichi (7 years old).

My father's style ``By applying d pressure, the killing device (I
The same effect as in the case of IJ can be obtained.

[Song dynasty, the end of invention]

As explained in 1 above, according to Fu → Omei, even when surface resistance toner is used, there is no dust present, and according to 1141, the difference between the stack and the sleeve that absorbs and carries the toner. The 4 load of the 1 ratio load pattern that is formed on the 1st resistor (even if it is a MI2 Vr blower) is no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no. JNJQ・Total 1 (
By L, the exhausted toner flI can be charged to the local band 1d, and υr gives the current i,'lj lii%
The aim is to provide the current 1f fissure without the bite becoming one generation.

[Brief explanation of drawings]

FIG.
λI. iJL 21'l Hamoto eF3 Akira ('J zf< 2
') W'-;/l'J The ゛+IJi diagram showing f, the white t3 diagram is the center Q+lj j+l of aN 3 of the present invention.
J all no J- < j- '3 a... Guide Q
j, 'IIE Suri・-F, 31)...4 color edge 1 〆C...'l'12 j・East 1 main three -
5.22...Father style T Hongryo, 7. Kangen body, 8.
I2...8 resistors, 9 "'l"j;'ui,i'+
Is 'M, 1 0-to no-, F
'+...T (i, IWJ pattern. Agent: Patent attorney Noriyuki Chika (and 1 other person)

Claims (1)

[Claims] (1) By carrying and supplying the developer to the recording medium on which the 14L I#r pattern is formed by the developer support member, the developer is distributed to the developing device that visualizes the charge pattern, and The agent support 1 and 11X materials are
The i! 2. The developing device according to claim 1, wherein the developing device is provided with rl'K, ili; A developing device according to claim 1.