CN201373980Y - Rotator end sealing element and developing device - Google Patents

Abstract

The utility model relates to a rotator end sealing element and a developing device with the end sealing element which is used for sealing the end of a developer bearing rotator such as the photo-conductor drum and the developing roller of an image forming device. The rotator end sealing element comprises a fiber part which comprises filaments formed by hollow fibers. The filaments formed by hollow fibers are utilized to form the fiber part of the end sealing element, so as to reduce filament rebound, and even the outer circumferential surface of the rotator under low compression burden can be fully sealed. Because the compression burden is low, the torque of the rotator can be reduced, and the service life thereof can be prolonged. In addition, even during high-speed rotation, little friction heat is generated to the sliding part, therefore, the temperature rise of the rotator can be avoided, and the fusing and adhesion of the developer can be avoided in case of using synthetic resin as the developer.

Description

Rotary body end seal and developing apparatus

Technical field

The utility model relates to rotary body end seal that the rotary body end of a kind of photosensitive drums to image processing system, developer roll equivalent-load developer seals and the developing apparatus with this end seal.

Background technology

Image processing systems such as existing printer, duplicating machine, facsimile recorder adopt electrofax mode as shown in Figure 9 to carry out the formation of image usually.When utilizing the electrofax mode to form image, adopt carbon dust 12 as developer usually, by developer roll 13 electrostatic latent image that carbon dust 12 is applied to the surface that is formed on photosensitive drums 1 is developed.Photosensitive drums 1 is along sense of rotation 1a, i.e. the clockwise direction of Fig. 9 rotation is in electriferous state for making its surface, is provided with charging unit 2 around the photosensitive drums 1.For charging unit 2, be provided with developing apparatus 3 in sense of rotation 1a downstream.In the downstream of developing apparatus 3, be provided with contacted and be positioned at the transfer member 5 of the below of paper 4 with the paper that is used to write down 4.At the upstream side of charging unit 2, be provided with cleaning member 6.Paper 4 is transported to fixing member 7 with after photosensitive drums contacts, and heats and pressurized treatments by warm-up mill 8 and backer roll 9.

To make the power on surface of photosensitive drums 1 of lotus, even area carry out rayed by charging unit 2,, form electrostatic latent image being disappeared by the electric charge of rayed part.Irradiates light 10 is as the laser beam for corresponding to the image that should write down luminous intensity being changed in laser printer, as be the reflected light from the original copy surface in duplicating machine.Supply with to the carbon dust 12 of going up electric charge from developing apparatus 3, the electrostatic latent image on photosensitive drums 1 surface is manifested.The electrical insulating property height of carbon dust carries out corona discharge with the carbon dust opposite polarity by transfer member 5, and the carbon dust on photosensitive drums 1 surface is attracted and is transferred to the surface of paper 4.Be transferred to the heating and pressurizing of carbon dust by fixing member 7 on the paper 4 to fusion, be fixed to the surface of paper 4.The carbon dust that remains in the surface of photosensitive drums 1 is removed with cleaning member 6, can be to the charged generation obstacle by charging unit 2.

Developing apparatus 3 is stored carbon dust 12 in framework 11, by the developer roll 13 that contacts with photosensitive drums 1, supply with carbon dust 12 on photosensitive drums 1.For making framework 11 interior carbon dusts 12 be attached to the surface of developer roll 13 efficiently, be provided with donor rollers 14.Donor rollers 14 touches developer roll 13 on one side, Yi Bian stir the carbon dust 12 in the framework 11, carries carbon dust 12 to developer roll 13.For the carbon dust layer that adheres on the periphery that makes the developer roll 13 that rotates with respect to the framework 11 of developing apparatus 3 is controlled at below the certain thickness, the scraper 15 that is used as the developer control assembly is controlled.For making carbon dust 12 charged, be provided with direct supply 16a, 16b.For making carbon dust 12 successfully transfer to developer roll 13 from donor rollers 14, direct supply 16a is set to and is higher than the direct supply 16b voltage that is applied to donor rollers 14 on absolute value of voltage.

The turning axle of developer roll 13 be in order can to rotate, and there is the gap that can be passed through by tiny carbon dust 12 in its rotary supporting part.The carbon dust 12 that leaks via rotary supporting part can pollute image processing system inside, and carbon dust 12 also has been wasted.In order to prevent the leakage of carbon dust, at the outer peripheral face of developer roll 13, along near the two ends of rotation direction and the part of turning axle be provided with seal.

Scraper 15 is supplied with the occasion of single component carbon dust as developer at developing apparatus 3, has the critical function of control attached to carbon dust 12 thickness on developer roll 13 outer peripheral faces.Near the both sides of the axis direction of developer roll 13, be easy to rotate into from the carbon dust 12 of scraper end.THICKNESS CONTROL effect by scraper 15 can be impaired.Therefore, the end of scraper 15 need be provided with seal equally.

Figure 10 illustrates near the sealing state of an end of the axis direction of developer roll 13, and another is distolateral also to be same.That is to say that developer roll 13 is in the both end sides of axis direction, axle 17 is rotatably supported to framework 11 by bearing 18.At the two ends of the outer peripheral face of developer roll 13, be provided with end seal 19 so that carbon dust 12 can not leak into the outside from the part of the bearing 18 that is located at framework 11 sidewalls.In Fig. 9, for simplicity, scraper 15 shows as the part of framework 11, is the parts that separate with framework 11 in fact.Scraper 15 is installed to framework 11 by installing plate 20, and installing plate 20 usefulness bolts 21 are fixed on the framework 11.Rear side in scraper 15 ends is provided with doctor back face seal 22.Partially overlap for the end seal 19 of developer roll 13 with for the doctor back face seal 22 of scraper 15, be easy to generate the gap at seam crossing.

Figure 11 (a) and Figure 11 (b) illustrate the section constitution of seeing from the right side of Figure 10.Figure 11 (a) illustrates the state of seeing from the profile line A-A of Figure 10, and Figure 11 (b) illustrates the state of seeing from the profile line B-B of Figure 10.Shown in Figure 11 (b), the seam crossing of end seal 19 and doctor back face seal 22 is owing to being easy to generate the gap, so carbon dust leaks easily.

Figure 12 is illustrated under the state that developer roll 13, end seal 19 and doctor back face seal 22 are installed in the framework 11, and the assembling parts that will include scraper 15 and installing plate 20 is installed to the state on the framework 11.As Figure 13, end seal 19 has the both sides structure, is felt layers 19a on the surface, and the inside is the elastic foam layer 19b of sponge and so on.Establishing felt layers 19a on the surface is because be necessary to contact the outer peripheral face of developer roll 13 and seal, the frictional resistance that reduces to contact.

To the sealing of the end of existing rotary body is to carry out with the overlapping seal of felt or sponge or felt and sponge or seal of tubulose etc.For sealing fully, be necessary to improve the being adjacent to property of rotary body, with suppress contract or by force extruding carry out the sealing of carbon dust.This is in order to improve the being adjacent to property with rotary body, to prevent that carbon dust from penetrating into sealing.Thus, the moment of torsion of rotary body increases, and rotary body is produced unnecessary load, has influence on the life-span of machinery.The friction of the contact site of seal and rotary body is bigger when high speed rotary, causes the temperature of roller to rise by fricative heat, thereby causes roller to become poor qualityization, and also having carbon dust is the occasion of resin, and this heat makes carbon dust softening and generation is adhered easily.

As shown in Figure 9, in the electrofax mode,, optionally supply with from charged carbon dust and develop from developing apparatus forming electrostatic latent image as on the photosensitive drums 1 as supporting body.Developer roll 13 to rotation in developing apparatus 3 is necessary to seal, and about photosensitive drums the necessity of carrying out at toner seal is arranged also simultaneously.About the technology formerly as the sealing of the cleaning device of cleaning member 6 is to disclose in the disclosed flat 4-41350 of Japan's special permission communique, flat 4-41351 communique.Even these are formerly in the technology, the end rear side of cleaning doctor and separately seal is set as supporting body respectively also is to use felt or the elastic foam material as seal.

The sealing of the end of the rotary body of employed photosensitive drums 1 or developer roll 13 and so on is the moment of torsion that must improve being adjacent to property and increase rotary body when forming image in the electrofax mode, and this can have a strong impact on the life-span of machinery.On the contrary, for alleviating moment of torsion, the sealing variation can take place in the loading sealing with lower, and carbon dust enters seal inside, and carbon dust falls and disperses to the problem of periphery.Also have, when high speed rotating, by the heat of friction at the contact site of seal and rotary body, the temperature of rotary body rises bigger, is the occasion of resin at carbon dust, has the phenomenon of the softening adhesion of carbon dust.For improving these, it is complicated that the structure of supporting rotator is certain to become, and brings the problems such as increase of number of components.

As shown in figure 10, the side of developer roll 13 prevents the leakage of carbon dust 12 with end seal 19, is difficult but will seal fully.The leakage of carbon dust 12, each time interval of filling carbon dust shortens in the framework of Fig. 9, and operation cost rises.

Existing developer roll end seal 19 is felt or sponge, or felt and the overlapping seal of sponge, also can use silk in villous seal etc.In using the developing apparatus 3 of felt, use registered trademark for the felt of the tetrafluoroethylene system of special teflon (TEFLON) etc. for improving sliding.Use the occasion of sponge to use the high silicon sponge of sealing property.But, be to improve being adjacent to property for developer roll 13, with suppress contract or by force extruding carry out the sealing of carbon dust 12.Thus, it is higher that rotation drives the moment of torsion of developing apparatus 3, can cause connecting gear gear wearing and tearing and the phenomenon of density unevenness appears.On the contrary, reduce force of compression, carbon dust 12 can penetrate in the end seal 19, and the falling and fly away of carbon dust 12, and causes machine intimate to be polluted, thereby reduces press quality.

Also have, in the sealing as the scraper 15 of developer control assembly and developer roll 13 of end, owing to there is the difference of high low degree, prior art is in order to seal fully, end seal 19 and doctor back face seal 22 use a plurality of seals, the end of sealing developer roll 13 and the back side of scraper 15.And seal is owing to use suppressing under the state of contracting, can produce need be bigger the moment of torsion problem that could drive.

In the occasion of using fibrous seal, consider deformation set, fiber uses thicker silk, and elastic force increases, and is used to drive needed moment of torsion and rises, and cost rises thereupon.The fibre coarseness of silk is thinner, can not get sufficient elasticity, can leak.

In existing seal, when applying the sealing load of the sealing property that keeps appropriate, when high speed rotating, the surface of developer roll 13 and end seal 19 can make carbon dust 12 softening or fusions by friction generates heat, produces the phenomenon of developer adhesion.

The utility model content

First purpose of the present utility model provides the simple formation of a kind of usefulness just can realize sealing effectively, thereby prevents the rotary body end seal that developer leaks.

Second purpose of the present utility model provides a kind of developing apparatus with this seal.

For realizing above-mentioned first purpose, the utility model provides a kind of rotary body end seal, includes fiber portion, and this fiber portion comprises the silk that is made of hollow fiber.

The silk that the utility model adopts hollow fiber to constitute forms the fiber portion of end seal, and the resilience that can alleviate silk is even also can seal fully the less situation of the compressive load of rotary body outer peripheral face.Because compressive load is less, can alleviate the moment of torsion of rotary body, prolonged the serviceable life of rotary body.Also having, even high speed rotating is also less in the heat of friction that sliding part produces, rise so can prevent the temperature of rotary body, is the occasion of synthetic resin material etc. at developer, can prevent the fusion and the adhesion of developer.

In the utility model, described hollow fiber is that the poriness hollow fiber is better.

In the utility model, described fiber portion is the fine hair shape, utilizes the top of the silk of fluffing to contact with rotary body, even also can obtain sufficient sealing to the contact pressure of rotary body is less.

In the utility model, form of the sense of rotation inclination of the silk of fiber portion along rotary body, the moving direction of control developer is consistent with sense of rotation, and developer can past not moved axially.

In the utility model, described fiber portion also comprises the silk that is made of solid fibers.Less by the silk rebound resilience that hollow fiber constitutes, and the silk rebound resilience that is made of solid fibers is bigger, knits by both are mixed, and adjusts rebound performance, to tackle the partly situation of elasticity of demand.

In the utility model, described fiber portion also comprises the silk that is made of conducting fibre.Owing to mix the silk inweave conducting fibre in seal, even to the sealing of motion parts, also frictional electrification is given birth in difficult labour, alleviates the obstruction that the aggegation of developer causes.

For realizing above-mentioned second purpose, the utility model provides a kind of developing apparatus, comprising: the developer roll of bearing developer layer; The end seal of sealing developer roll end, this end seal includes fiber portion; The developer control assembly of the developer layer thickness of control developer roll carrying, the end of this developer control assembly is provided with sealing backside spare; Wherein, described fiber portion comprises the silk that is made of hollow fiber.

Developing apparatus of the present utility model has the developer roll end seal that comprises fiber portion, the silk that adopts hollow fiber to constitute is contained in fiber portion, thereby alleviated the resilience of silk, even also can seal fully to the less situation of the compressive load of rotary body outer peripheral face.Because compressive load is less, can alleviate the moment of torsion of rotary body, prolonged the serviceable life of rotary body.Also having, even the heat of friction that produces at sliding part when high speed rotating is less, rise so can prevent the temperature of rotary body, is the occasion of synthetic resin material etc. at developer, can prevent the fusion and the adhesion of developer.

In the utility model, described hollow fiber is that the poriness hollow fiber is better.

In the utility model, described fiber portion is the fine hair shape, utilizes the top of the silk of fluffing to contact with rotary body, even also can obtain sufficient sealing to the contact pressure of rotary body is less.

In the utility model, form of the sense of rotation inclination of the silk of fiber portion along rotary body, the moving direction of control developer is consistent with sense of rotation, and developer can past not moved axially.

In the utility model, be located at the end seal of developer roll end and the sealing backside spare of developer control assembly end and be structure as a whole.Owing to the sealing at the back side, end of the sealing of developer roll end and developer control assembly just can be realized with a seal, can reach the purpose that reduces cost.

Description of drawings

Fig. 1 (a) is the partial cross section figure of user mode of the fiber portion 34 of the utility model example one; Fig. 1 (b) is the illustraton of model of poriness hollow fiber 40.

Fig. 2 has the end sealing body 36 of fiber portion 34 and the developing cell exploded perspective view partly of developer roll 31.

Fig. 3 is the sectional view of user mode that is used for the seal 69 of step portion as expression in other example of the present utility model.

Fig. 4 is as another example of the present utility model, is illustrated in the user mode synoptic diagram of the end seal 75 of the end that seals developer roll 71 and scraper 76 in the developing apparatus.

Fig. 5 (a) is the sectional view that the profile line A-A from Fig. 4 is seen; Fig. 5 (b) is the sectional view that the profile line B-B from Fig. 4 is seen.

Fig. 6 is in the developing apparatus of Fig. 4, and the view of scraper 76 is taken out in expression.

Fig. 7 is in the developing apparatus of Fig. 4, and the simplification right hand view of the state of scraper 76 and developer roll 71 is taken out in expression.

Fig. 8 (a) is the front view of end seal 75 before installation of Fig. 4; Fig. 8 (b) is the right hand view of this end seal 75 before installation.

Fig. 9 is the existing simplified side sectional view that forms the basic comprising of image with the electronics photographic means of expression.

Figure 10 is in the developing apparatus 3 of Fig. 9, the part front view of the end seal 19 of the end of expression sealing developer roll 13 and scraper 15 and the user mode of doctor back face seal 22.

Figure 11 (a) is the sectional view that the profile line A-A from Figure 10 is seen; Figure 11 (b) is the sectional view that the profile line B-B from Figure 10 is seen.

Figure 12 is in the developing apparatus 3 of Figure 10, and the view of scraper 15 is taken out in expression.

Figure 13 is in the developing apparatus 3 of Figure 10, and the simplification right hand view of the state of scraper 15 and developer roll 13 is taken out in expression.

Embodiment

In the part of the developing apparatus that Fig. 1 (a) illustrates constitutes, when developer roll 31 is the center rotation with turning axle 32,, be provided with end sealing body 36 in its end in order to seal the carbon dust 33 of developer roll 31 carryings.The fiber portion 34 of end sealing body 36 is adjacent on the outer peripheral face of developer roll 31 in case blocking powder 33 leaks into the end of axis direction, stops moving of carbon dust 33 simultaneously.Fiber portion 34 forms the fine hair shape, makes the silk of fluffing tilt to the sense of rotation of developer roll 31.The developer roll 31 of fiber portion 34 radially foreign side be provided with the back up pad 35 of metal or hard resin system.Fiber portion 34 and back up pad 35 constitute the end sealing body 36 of developer roll 31.

Fig. 1 (b) illustrates the tectonic model of poriness hollow fiber 40 of the fiber portion 34 of pie graph 1 (a).Such a hollow and can to adopt Japanese clock to spin joint-stock company at the poriness hollow fiber 40 that forms a plurality of Small Holes on the fiber be that " PVC オ セ one Off " is provided to the tacryl on the market with registered trademark.This tacryl mixes antibacterial deodorant in the raw cotton fabrication phase, keeps suppressing bacterium and eliminates stink.When exploitation, can enumerate interior decoration fields such as bedding field, curtain, carpet such as woollen blanket, sheet, towel according to purpose and purposes.Material fields such as dress ornament field, filtrator such as underwear, tights, sweater.As the material of filtrator, the hollow fiber that also can use nylon-type is in water purifier etc.

Poriness hollow fiber 40 forms center pit 42 at central part, and forms a plurality of holes 43,44,45,46 on periphery wall 41.Center pit 42 runs through whole fiber along the longitudinal direction, is communicated with between the surface that hole 43,44,45,46 makes periphery wall 41 and the center pit 42.Poriness hollow fiber 40 can alleviate the resilience when compression by this formation.Certainly, therefore the resilience when 43,44,45,46 hollow fiber can alleviate compression too even without the hole, only has the hollow fiber of center pit also can adopt.

Fig. 2 is illustrated in the periphery relation of plane of end sealing body 36 and developer roll 31 among Fig. 1 (a).End sealing body 36 is attached to the end of developer roll 31 outer peripheral faces, is provided with the blank parts 51,52 that carbon dust does not adhere in the axis both end sides, and the width in conjunction with lettering forms carbon dust layer 53 therebetween.The turning axle 32 of developer roll 31 is rotatably supported by the framework of developing cell 54, is fed into the carbon dust layer 53 of developer roll 31 from the carbon dust of developing cell 54 inside.The carbon dust thickness of carbon dust layer 53 is adjusted to remain on below the certain thickness by the scraper 55 as the carbon dust control assembly.In the fiber portion 34 of end sealing body 36, tilt by making a sense of rotation that forms villus fiber portion 34 along developer roll 31, make the moving direction of carbon dust consistent with sense of rotation, can be toward moving axially.

Fig. 3 illustrates the rotary body end seal of other example of the utility model.Developer roll 61 is rotatably supported by the bearing portion 63 of the framework of developing cell 62.Developer roll 61 can be inserted into inside from the framework outside of developing cell 62, and after the insertion, clamping part 64 relies on the elasticity of spring outstanding, can not pull out the outside.Clamping part 64 is located at the bearing portion 63 close inboards than the framework of developing cell 62 about the direction of the axis 61a of developer roll 61.Clamping part 64 is a sliding part 65 towards the part of bearing portion 63, and than sliding part 65 close outsides formation are sealing receiving portions 66.Be provided with diameter in the foreign side of developer roll 61 and be maximum end 67.Framework towards the developing cell 62 of the sealing receiving portion 66 of the end of developer roll 61 forms rugged ladder 68.Contain and insert between the sealing receiving portion 66 of the framework of developing cell 63 of ladder 68 and developer roll 61 sides with containing the felt shape seal 69 that the silk that is made of the poriness hollow fiber shown in Fig. 1 (b) 40 forms.By using such a seal 69,, also can stop the leakage of carbon dust effectively even in the part that ladder 68 is arranged.If mix the silk that inweaves solid fibers, can adjust rebound resilience.If mix the silk that inweaves electric conductivity, it is difficult that frictional electrification becomes, the aggegation and the obstruction that can alleviate carbon dust.

The part that Fig. 4 to Fig. 8 illustrates the developing apparatus of another example of the present utility model constitutes.

Fig. 4 is illustrated near the sealing state of an end of the axis direction of developer roll 71, and the other end is identical with it.That is to say that developer roll 71 relies on bearing 74 rotatably to support at the two ends of axis direction by framework 73.Two ends at the outer peripheral face of developer roll 71 are provided with end seal 75 in case the blocking powder leaks into the outside from the bearing 74 that is located at framework 73 sidewalls.The end seal 75 of this example is to form the fine hair shape with containing the silk that is made of the poriness hollow fiber shown in Fig. 1 (b) 40.Scraper 76 and installing plate 77 usefulness bolts 78 thereof are fixed to framework 73.End seal 75 also is the sealing backside spare of scraper 76 simultaneously, and the rear side of scraper 76 ends covers by the part of end seal 75, prevents the leakage of carbon dust.

Fig. 5 (a) and Fig. 5 (b) illustrate the section constitution of seeing from the right side of Fig. 4.Fig. 5 (a) illustrates the state of being seen from the profile line A-A of Fig. 4, and Fig. 5 (b) shows the state of being seen from the profile line B-B of Fig. 4.Shown in Fig. 5 (b), in the fiber of end seal 75, the state of scraper 76 for sinking.In end seal 75,, scraper 76 is reduced in the loading of end owing to use hollow fiber or porose hollow fiber.

Fig. 6 is illustrated in installation developer roll 71 and end seal 75 arrives under the state of framework, and the assembly that will comprise scraper 76 and installing plate 77 is installed to the state of framework 73.Fig. 7 illustrates the state that the assembly that comprises scraper 76 and installing plate 77 and developer roll 71 separate from framework 73.Fig. 8 (a) and Fig. 8 (b) illustrate front and the side profile before end seal 75 is installed respectively.In end seal 75 owing to use the silk that constitutes by hollow fiber or porose hollow fiber to form villous fiber portion, contact be with fluff thread the top carry out, even less, also can obtain sufficient sealing to the contact pressure of rotary body.Also have, the fine hair of end seal 75 can be processed with oblique hair.A sense of rotation along developer roll 71 that forms villus fiber portion is tilted, and the moving direction of control carbon dust is the sense of rotation of developer roll 71, to prevent that meeting is toward moving axially.Therefore, if, then can further reduce moment of torsion with the oblique hair of formation such as sanding machine processing along the sense of rotation inclination of developer roll 71.

In this example, the silk that the villus fiber portion of end seal 75 adopts hollow fiber or porose hollow fiber to constitute, load reduces when compression, scope in the scope of the high compression amount (high loading) of existing end seal 19 and the low decrement of doctor back face seal 22 (low loading) there is no need to carry out separating of parts, only just can satisfy sealing function, reach the purpose that reduces number of components thus with 75 1 parts of end seal.

End seal 75 also can be to be formed with mixed the knitting of the silk of solid fibers by the silk that poriness hollow fiber 40 constitutes.Because the silk rebound resilience that poriness hollow fiber 40 constitutes is little, the silk rebound resilience of solid fibers is bigger, knits by both are mixed, and the adjustment rebound performance can be tackled in the occasion of elasticity of demand partly.In end seal 75, also can mix the silk that inweaves conducting fibre.If mix the silk inweave conducting fibre, promptly use sealing to motion parts, also be not easy to produce frictional electrification, can alleviate the obstruction that the aggegation by developer causes.

Also have, in each example of above explanation, not only can be used for sealing the end of developer roll 31,61,71, prevent the leakage of carbon dust, and also can similarly be suitable for the utility model as supporting body or other machine that will handle developer as photosensitive drums and so on.

Claims (10)

1. a rotary body end seal includes fiber portion, it is characterized in that: described fiber portion comprises the silk that is made of hollow fiber.

2. rotary body end seal according to claim 1 is characterized in that: described hollow fiber is the poriness hollow fiber.

3. rotary body end seal according to claim 2 is characterized in that: described fiber portion is the fine hair shape.

4. rotary body end seal according to claim 3 is characterized in that: the silk that forms described fiber portion tilts along the sense of rotation of described rotary body.

5. according to each described rotary body end seal of claim 1 to 4, it is characterized in that: described fiber portion also comprises the silk that is made of solid fibers.

6. according to each described rotary body end seal of claim 1 to 4, it is characterized in that: described fiber portion also comprises the silk that is made of conducting fibre.

7. developing apparatus comprises:

The developer roll of bearing developer layer;

The end seal of sealing developer roll end, this end seal includes fiber portion;

The developer control assembly of the developer layer thickness of control developer roll carrying, the end of this developer control assembly is provided with sealing backside spare;

It is characterized in that:

Described fiber portion comprises the silk that is made of hollow fiber.

8. developing apparatus according to claim 7 is characterized in that: described hollow fiber is the poriness hollow fiber.

9. developing apparatus according to claim 8 is characterized in that: described fiber portion is the fine hair shape, and the silk that forms this fiber portion tilts along the sense of rotation of described developer roll.

10. according to each described developing apparatus of claim 7 to 9, it is characterized in that: described end seal and described sealing backside spare are structure as a whole.

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