DE1797065A1 - Electrophotographic latent image developing device - Google Patents

Description

Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann, Difl. Phys. Dr.K. Finckb Dipl.-Ing. F. A / Weickmann, D1PL.-CHEM. B. Huier

I MONK 17 DEN

MDHLSTRASSE 22, CALL NUMBER 413921/22

J; ink Xerox uouse,
'■ j > 3, iiiurton Road,
Long021, IT / w "»

I ^ tv / icklung voriuchtung for electrophotographic latent charge images

The invention relates to regulating the amount of toner particles on 2r Igertoilchen in two-component loading PY tohenden xerograf laughing ϋηΐ developers st of fen and particularly relates to a ENTV / i exercise device for electrophotographic latent images, the optimum toner concentration liit ./■ its end of development can be maintained.

:, eiu; c (.v: 'ogL';, i'i:; chen procedure,.; ie en in the US patent specification; ':' .// ί> Ί! bo wrote on .ir.t, Hi ent an on oiner v . I t -r-.i : _v ■ /; \ ") V" / j:; uhon :: w'chi r.li L 'LiIO- fοLolo' L Due Isülior-., Im1To; j al :; xoru :: r ".i'i . ■:. <·. '1Ί"l'loiie rough *, tul'nahiae elnl tro- ::!. .1 '· .-.' Mot ¹ '!.; J · ΐ (, 'ί. ·.' ¹ Oi 'li.'jt'iiialuii) archriihfiing dieaoa /'.-Γί'-κ.ν-Ut:, / tfil Ι! XUT ¹ U,; r; t »': ;;« lie Di J di'l ". ^ Iie /," lüLolüdäiii _v j •'■;!. Lr ¹ U: / t; iti., Ι-.ίι ■ »■ ι ',, I ü im I then iii t. . i 11 ο dei.i. ί'.ιι rcipt'oi ·. i.-if '.iU!. ;; <iLd i-ii »... i '">: i: -: i: ι. · i ι! ι' (.ui Lüii U. t · .- 'fb iL L' * i ι 1. Iy vvuiUil 't: h

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the charge in the exposed parts of the surface is dissipated. The non-discharged parts of the sheet of the layer form on top of it , / ice an electrostatic charge neustear eatapree shirt the ! υconfiguration of the original Idch-faattStera.

There;:; latent electrostatic image can then be «sitwiokQlt, indei.i ea with a finely divided» electrostatically attractable powdery. Material is treated in contact with * The powder is held in the image parts by the electrostatic charges on the layer. The greatest amount of powder is deposited at the point of greatest charge, and little or no powder at the point of smallest charge. Aaf this part results in ice. deia Mchtbild άβ3 zu reproäusdereneieÄ image corresponding BilVeyfeild, Bieses v; is transferred to a sheet of paper or another Fliiake and txedt this as a permanent print 'fix * ö * t; \

The electrostatically attractable development generally used in xerography consists of a pigjaeattiei'ten Kunutliarzpulver _{r which is} envied as "toner", as well as a coarse-grained substance that is alo "carrier ¹ · toezeioöet is drawn with a substance particle who imterliulb the frictional Irish lioiho v (»a the toner eineai AbüLarid, no daJi av / iuchoti de» .i Iiilver and the liörnigen 'i'Ägerii ιοί'! 'at _v ; on the outside weöhüolvvirlaing an I ^ u diuugb:' -.vird. I) Oi ¹ Hi 'ti ^ ii charges vui'iiro.-iclioii »Yes» clinging dea Pulveinr to the'tV'j;n'alioL'C, The Tr'igex'Lumer onaügliohen atiüöc the

mechanical control compared to the toner, so that the toner can easily be brought into contact with the exposed xerographic image area. The powder particles are sucked away from the granular carrier onto the electrostatic image, creating a visible one Powder image on the xerographic image surface.

The quality of the developed image can be determined by the ratio of the toner particles to the carrier particles within the developer be affected. This ratio corresponds to the toner concentration. For example, there is If there is a lack of toner, the image surface parts cannot sufficient pitch for the complete development of the image attract, so that undesirably bright images are produced. On the other hand, there is too much toner in the developer present, the image areas become too dark, and amounts of toner also ground on the areas that do not belong to the image deposited. This is due to the fact that the attractive force between toner particles and a carrier particle inversely proportional to the number of toner particles present on this carrier particle. Are therefore a few toner particles on a carrier particle, they are strongly bound to the carrier particle and cannot easily are released onto the charged image surface parts. If there are too many toner particles on a carrier particle, 8p, mutual attraction is often blackened to a point for the remaining charge of the ones not belonging to the picture

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The surface area is sufficient to remove the toner particles from their carrier particles to remove.

So far, various attempts have been made to regulate the ratio of toner to. Carrier material carried out within the developer material. These were generally aimed at the periodic addition of toner to the developer material mixture in order to replace the toner used up by the image developments. In various development devices this is done by periodically adding toner aur. Desiccant mixture within a given cycle of time or by a device that allows direct measurement of the desiccant properties or the density of the developed image. Depending on the letting result, a suitable amount of toner can then be added to the developing agent.

Such processes are satisfactory in a certain way, but also have ITaohteilo! ", If, ..";.; · (! Bcijpielavieitje the toner is added to the developer, no it is generally done evenly over the entire length of the development zone. However, if an image to be reproduced has large, dark areas, for example in the! 'ühitwicklerütoff gi oicluaüßig over

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never eliminate this irregularity. Pernoi 'require known developing devices that work, for example, in a stremulating manner, a gev / isso period to compensate for a sudden consumption of ion which is caused by the development of large, dark parts. This time lag can prevent the development from becoming unpredictable. This noise problem makes it difficult to occur with some types of post-timer timing devices. These problems have not yet been declared as serious, but they can never have an aggravating effect on the B11 dent development in the future, the work devices are increased and the demands placed on them are higher, "Jhüntöriungen gostell h will be.

UekanuLe xonornactrfl'.Llvorrioritun ^ 'en for irerographic ivi ut ent, / ic 1:11 mg generally enable the ΙΌ nor toi l.fihen dui.'. »L! Leave VrMgerkörner until the 'i'rrigTj.'lzörner do not attract the right amount of friction electronics and b'uiüüu kiJiuien. ./Lrd:; u: iätzl.i.ohur toner on the surfaces of the Τι · 'güfkörnor Reibiüig.'i'ilektt'iüch gfibundon, so Hlvo olekbro.'jLal. i iic; he attraction skis ';'. Π; L'ilr more toners- ','j.'l'ihonprouoL'tional the Ijoroits on their Ubot.'LMflehe bef.i tifi'l i. fihen '!.' onanieng ^. IJ ϊ ti inert granolion, such elolitro-: \, · :. I ^.; .; ¹ Il l.oJnoii ./öl. lüi'oii Toniii ¹ iiuftiohnujn liatiri, is called ge \, ': \\. \. \ _t ; L l) e: '. (jLchno t, Diecor ¹ L!; lb bi / -; uii {;: i. ";t'ucl Ls b Lm al.Lgenui.inon ^ j. ·" ... · - :! · aLr; Άν.ν ί'Πΐ · oih .mi mi .;; v // el »» oiiiiiorif.-nUsn tiof-s Lotions ί'ίηΐ.

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winderutoff desired optimal toner concentration value. Therefore, electrostatic latent images are saturated with Developer developed v / earth, darker than this is desirable. L's showed, however, that by production an additional electrostatic force against which the carrier grains to attract and bind toner particles have to act, the toner concentration of a two-component lintwicklerstoffes vom Seeding value reduced to the desired optimal I / ert can be. An additional force that can be changed, such as a variable voltage source, then enables an optional regulation of the toner concentration.

This knowledge on which the invention is based is made possible a refill of toner in a two-component developer for xerographic image development exactly according to the from your developing agent through the image development amount of toner removed. The Touüi concentration can be regulated electrostatically. So is oine. Maintaining the optimal toner concentration on each spout of a wrapper:?, ζ one possible. Furthermore, the Toner particles form the 'i'ragerkörnurn corresponding to the electrostatic Properties added to the respective development v / earth.

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: ¹ Realization of this LJjcnr.ehari.en draw !; A developing device for electrophotographic latent charge images according to the invention is made up of a storage device for a dietary element consisting of carrier grains and charged toner particles close to the image surface to be developed, and a vibration device for storage in order to transfer the developing substance on the storage device Quasi-liquefied state in contact with the image surface to be developed, through a development electrode arranged near the image surface, provided with openings and with a bias voltage of the same polarity as the charge image, and through a toner filling device with an electrical pre-voltage between storage and development electrode to repel charged toner particles from the development electrode to the storage and a device for inputting toner particles with a charge opposite to the charge of the image to be developed into a toning zone between the development electrode and storage, see above that poorly tinted carrier grains vibrating between image and storage can attract and bind additional toner particles triboelectrically up to an optimal toner concentration by overcoming the electrostatic force of the development electrode, which repels the charged toner particles towards storage.

Embodiments of the developing devices according to the invention in the following on the basis of the figure on.

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Pig. 1 shows the section of a xerographic copier which is equipped with the developing device according to the invention, parts of the En.

Pig. 2 the section of a copier similar to that in Pig. I type shown, but with different toner refill elements, and

Pig « 3 shows the cut of a copier similar to that in Pig. I and 2, but with different toner refill elements.

In Fig. 1, a xerographic image area 10 is shown, which has the shape of a drum and is rotatably mounted on an axis 12 in the arrow direction shown there. The TroMnel l: can be rotated about the axis with a drive device, not shown. Your surface area will be on this V'ei se one after the other at the different aerographic process tunnels moves past like them in Pig. I are shown. The elements of your copier are in the xerographic Technique known with the exception of the invention Developing device. The various xorographic Procedures on the xerographic image area are briefly described in the following:

^ Ui dor charging point A becomes a uniform electrostatic Charge on the photoconductive layer of the xerograflochen drum

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i.el upset!

f.ti dei Belichtungocstelle * B is a light or iJtrahlungfj-LiUiJter tle.j au reproducing forming the Tromuoloberflüohe i'x'ojii'.iert, r; o that the charge in d ^r jn exposed i'Luclienteilen abgeleite b and a latent α electro -.:; ta uiochen picture ent rs L ^ ht J

a: i ClQj. ' , lutwicklim.jcjatelle C, the toilet particles of a Zr: · -o-L'afLochen Entuieklerutoifeo, which counteract the charge of deo oil jlrtroü physical formations, are brought to the TroiiiLtelobci · surface, whereby they are attached to the o..lo: : ti ';i.'. i tat "! Julian image cling and dats Xvji'ografifjohe powder image κατ oinor dei.i au reprod.ι :: 'erendcn image ontijsprechenden uoni'i ^ ix-at :! on eruougon. j' ui diersur ύ toi La will also be the l'oner in don ijiiü './ icklei'ütof £ * eingoj-'ben, iua the'i'uner'/ al ürMcL' / ienJ iüL used for the development of j-ew.üilü do'i '1'ildii.bortra / ^. inguütellc I) v / ird da :; :: οrugrafische I * ulvorV) I "Ld elektrofitatiach from the l'roiiiiaeloberflache on •; inen" SiI dtmjor I.lbor * wear J mid

at the 'irüi.Lujlroinigiuigu- and ^ n tladiuigüt; parts i3 v / ird the ^; y'o: l olob M-i'J "ehe iait · ün ΙΓ '.. · ι · ι..ϋ: .ι-; i'o'wtlicher Toner Loilchen iiaoli. (IC'. ''] 1 diibo -r Lragung ab ;: .Ί) ^;; i ':. i lo 1. im I iai t, uLnui ¹ ' relatively hei Lon Jj.Lohuqu ·;!. Lü b <j Ii chi, ti \. _t um al no puu-t i.uch full: l, i ".ndige ΛυΙυΙ Uuig al 1 υ" r · '.':; i, 1 i flion <. I '.-L ti'ur ·. Lati.; (; h «! U summoner: ui be

iio Dnüv / ifiklung i'Lridot. Lu! Ί-μ · .'ich oLiun. · Ilf.lu/i.ngvort'i ehtiuig A : ibatt, _f '! .Ίο an dun oinainlof ;; ο / ·; uiüb iivliogcndon Ab; n: hluU-

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surfaces 16, these are each provided with an opening 18 with which they are pushed onto the Troioiaelantrietmaehse 12 at the respective end of the xerographic drum driven by the joints 26, each one of the end surfaces i it to the drive motor connecting and about which the oscillating device is crosslinked in a fast üchwingbewegung · one end of the Gelenkiiechanismus to ii.i respective butt center of the end surface attached nO "in the outer Yibratio- nen as low as possible to. keep.

If there is a quantity of developer material consisting of two components on the mounting plate 20 and this is set into a rapid oscillating movement by the motor 24 via the joint mechanism 26, the developer material, which is crosslinked in vibration, is integrated into one within the development zone quasi-liquid state and touches the image surface so that the latent electrostatic images can be developed - substance can pass through freely. l) io development electrodes int mil; oineir otwuo high voltage as «U.e4 ** dLgQ ^f

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Background surfaces of the image to be developed are biased, to prevent the build-up of toner on the background surfaces. can be kept low. The tension is in the usual Development devices positive. The development electrode 28 also serves another purpose to be described.

In a similar type of developing device that has already been proposed, the developing agent is caused by its gravity guided through the development zone to find the correct toner concentration within these ranges;:; to maintain. In the invention, however, this problem is not to be taken into account, since a novel toner replenishing device is provided.

According to the invention, the vibrating device 14 is provided with a further grid electrode 50 is provided. This serves as a storage for a certain amount of developer near to developing image. It is preferably concentric with the mounting plate 20, the xerographic image surface 10 and the winding electrode 28 are formed. The additional Grid electrode 30 allows with its openings the free passage of the toner particles but not the carrier grains, similar to the development electrode 28 this electrode is made of an electrically conductive material and eats connected to an electrical voltage. The area tinter of the additional electrode 30 and over the storage plate 20 forms a storage container 32 for

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Developer with an oversized proportion of toner particles. The area between the development electrode 28 and the additional electrode 30 is the tinting zone 54. Since there is no continuous I ¹ IuC of developer material through the development zone, as is the case with the previously mentioned proposed development device, there are on the storage plate between the lower surfaces 16 V / andungen 36 are provided, which prevent a movement of the quasi-liquid development material out of the development zone.

If the developer mixture turns into its quasi-liquid state through vibration during image development, so is continuously seen through the development of xerographic Images (toner used up. A certain amount of tinted developer a 30II is above the additional Electrode 30 are located and move between this and the xerographic image surface 10. This developer is used for image development and is kept within the toning zone 34 and the developing zone 23 the mesh size of the additional grid 30 does not have a passage the carrier grain allows downward.

When vibrating the vibrating device 14 during normal operation, a certain amount of toner particles within the Stock amount 32 due to the interaction with the grains of impregnation loaded. The vibrations enable charged people to ascend

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Toner particles through the additional electrode 30 in the toning zone 34. This vibratory force also acts ongoing Borührungsvorgange the; Developing agent at the

Curses 10.

I) λ to achieve an optimal tinting of the grains of grain within the tonnage ₁ Tj- and development scm en 34 and 22, uluk; on the electrodes 28 and 30 electrically biased no. This is done through a harvest of variable voltage source which holds the development electrode k: 8 on a slightly higher voltage across the back surface of the image to be developed. This is approximately 100% positive in the usual xerographic device. The second variable voltage source 40 always keeps the electrode 30 at a higher positive voltage gGg-jni.lbf for the development electrode 20 and if a distance of 6.35 μm is used between the two electrodes, a bias voltage of 4,000 volts at the '/ Λΐ'.

'ι'ι * cj bon at d.i.or »ei' Vovriohtuii,"; negative gtiladonu TunorteiLehen

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This removes the toner particles that are not attached to carrier grains are bound, do not enter the development zone 22. The slightly tinted carrier grains get into the vicinity of the charged toner particles, they attract and bind them them to an optimal tint of their own. They do not attract the toner particles to saturation because the force of the Development electrode 20 acts against the force of the too weakly tinted carrier grains and the toner particles back to the Aiming to promote the storage area. It can be seen that with the variable voltage sources 39 or 40, the repulsive The force on the toner particles can be changed in order to reduce the amount of the toner particles to be absorbed by the carrier grains to regulate. This in turn allows the image density to be controlled. This process continues as the frägerkürner in their quasi-liquid state between The xerographic image area and toning zone are moved back and forth so that they apply the toner to the image to be developed apply and also additional toner for further image development take up.

The task of the storage area is to provide a large amount of toner particles for the replacement of those consumed by the image development. It turned out, however verifiable, that the use of the conventional two-component Entwloklerotof Se TrägeYkörhern and Tcmoi'bcjLJ.ohun in Voi'i'ntoboreich some einscliriuikentle I * akbciL-on VI-rurmuiht; ■■ ·., ! »'.- finds a Ioh a too large amount of toner

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within the storage area, bo the heavier ones J irägerkörner is more in the lower area of the üntwiokleaf-

,. amount of substance and cause a frictional charge there. This creates an upper layer of toner particles that are in a non-charged state from the supply area enter the tint zone because they have not experienced sufficient contact with carrier grains. This can be avoided If a smaller amount of toner is used or the usual carrier grains in stock are replaced by larger pieces which impart a triboelectric charge to the toner entering the toning zone. Perner can an additional grid within the storage area something be provided below the additional electrode. If this grid has a surface from which the carrier grains cover Substance, the toner migrating upwards into the tinting zone contacts the surface of the grid and thereby becomes triboelectric charged in its entirety.

In Pig, 2 j st shows a second copier that similar to that in Pig. 1 built up iBt, but one has another additional electrode. The purpose of this change is to bring everyone fully charged into the tint zone to reach incoming toner particles. All elements of this second copying machine have the same reference numerals like that shown in Pig »1 with the exception of the modified parts.

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The additional electrode 30 of the first copier machine is' in Pig. 2 is replaced by a corrugated grid 42, the electrically insulating caps 44 of which cover its upper tiles. When the oscillating device 14 vibrates the toner particles from the "storage area 32 upwards into the The juncture zone 34 and the carrier grains that charge the ion within the storage area get inside the developer st off mis chung down. These carrier grains thus collect in an area close to the storage plate 20 in the lower part of the storage area 32. At the same time, there is a relative lifting of the toner particles in the upper Parts of the storage area 32 close to the caps 44. The caps 44 prevent the movement of uncharged toner particles from the upper store, however, adjust to the shade;:; Zone. Therefore, those toner particles constantly move from the storage area to the thinning zone 34 'which are in the lower storage area and are in contact with the carrier grains stand »This will better recharge those Detects toner particles that get into the tint area.

In order to network the copier machines described so far in operation » it is first necessary to switch on, not shown device to operate. This will make the different described traversing devices switched on and the xerographic drum at each process location in a continuous and automatic operation

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■ cycle moves past. The main egg switchgear causes also a connection of the bias voltages to the various Electrodes and the oscillating movement of the oscillating device 14.

The vibrating device 14 is placed in a vibrating state when there is a length of excessively tinted developing agent in the supply area 22 and an amount of two-component developing agent is in the tinting zone. The developing agent within the tinting zone is mixed with a quasi-liquid additive and touches the latent electrostatic image on the xerographic image surface for development. At the same time, an interaction occurs between the carrier grains and the toner within the storage area, which causes the toner to be charged. The vibration also causes the charged toner to move upward through the additional slectrode 30 or 42 back into the tuna ;; i; iione. Some of the charged toner particles also cause an independent attraction to the additional electrode, but can be removed by the servant, since such toner particles iui a sell) .; tflndi ;; oii Reibiuigneloktriochen Bin-UfUi ₁ ; un zu i; oi'Ln ₍ ^r ; tinted Tr ". ;; jrkuriiorn nt) Igen.

.! ci'u'ja 'Aixv i-int; yLuI: Lung ρο,'. ΐ. LLvur ÜiLder on the drum tiüijut.ive Ί '' · .Ί \ Aim v «r \ 't.-iidet,;·>) « rzeugb a ^ uuitivü prefix ; .il>i> .i) iaui'_; doi ' iiribwi.';! .. Lurii ;; jt ;! ■ ..trode L'i>, dL « ftuvinr _t <) V ; iLi; t iuj'-riL '; ^f · ι | ίΜ · ^ iiiir'iLr, LLehen Ul.tiktrode JO LuL, eiro ub: i fcüLJuride "■■" * ^: -. U * 10 9 8 2 7/1275

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Force on the toner particles in the iöaungsEone, bg that its movement is prevented in the Ihtwieklungszone 22 in "V / ground; Jedooh low tinted © TzägetfsJtiTXiop by the toning zone moves, they attract additional toner particles and bind them to the optimum toning, Diesur value lies somewhat below the saturation value »because i generates a force» which tends to transport the charged fonert particles back to the additional electrode and to the torrais area »

While the toner is developing through the image & out of the developer Mixture of substances The grains of impurities move into the! Pönungesone and from this, out and cause a Attraction and attachment of other invited students & granting * These are located within the blow-dry zone during the Vibration in a suspension state. A great ll close such Toner particles, however, remain on the Oittern JO or 42 electrostatically attracted. The charge of the slightly toned grains is sufficient to remove these toner particles from the grid deduct if necessary.

The second presented was carried out by the United States Entv / icklLuiLifjvorriohtiuiii works in the same way as the era te uit the Uhteri; chied that the dough dough from the storage area Toner gLeiolunäUiijer and completely reiuun ^ oelelctrioch loaded Inb, since he was concentrating with a at: Lrkor ben MentJu 'L't'iLßorkb'rner in BoilUiriuii; come, ilio «loh ira lower forward

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- 19 accumulate area.

Both execution fora allow additional input Toner, if a removable closure plate is provided in one of the end surfaces 16 of the vibrator. If this is stopped, the end surface can be close the supply area can be opened so that manual input of additional toner is possible Toner in the lower supply area about one flexible tube entered v / earth, which is connected to an elevated toner supply. It is also possible an en tv / i disgusting st off flow over the developing zone is similar v / ie in the previously proposed developing device to tell.

The one in Pig. 3 illustrated embodiment of the device according to the invention contains a mounting plate 20 which is attached to the \ 7andungen 36 and the end surfaces 16 with electrically insulating intermediate layers 48. The upper surface of the platen 20 is covered with a layer of insulating material 50 employing one of the conventional carrier covering materials described in U.S. Patent 2,610,551. Development electrode wires 52 run longitudinally through the development zone and replace development electrode 28 of FIG devices described above »A voltage source ') Q generates' an electrical voltage between the base of the forex

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graphic image area and the development electrode wires 52. A second voltage source 40 generates an electrical voltage between the development electrode wires 52 void, the storage plate 20. *

The intermediate grid 42 of the "two described above." Devices is by a rigid, electrically insulating Grid54 replaces, which consists of Saran o.a. »This' .Gritter is similar to the intermediate grids of the devices described above "provided with openings that allow a passage of the toner, but not the carrier carrier «The Cover caps 44 can be similar to those on the basis of FIG the device described form part of this grid. The tinting zone lies between the electrode wires 52 and the insulating grille 54. The electric field within the tint zone is not passed through a Swish grille but between the development electrode wires 52 and the support plate 20. The field within the toner charge zone between the grid 54 and the drum surface 10 is generated positive at the lower plate 20 by a high voltage of, for example, 5,000 volts. The layer of insulating material 50 on this plate supports the charge of the toner and also serves as a dielectric barrier eliminating the use of high voltages between the wires 52 and the board 20 enables and an electrical flashover between the two Elements prevented.

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DO third embodiment of the inventive device allows a more expeditious flow of the developer from development electrode wires back to storage areas This is possible because the field in the tonun ^ azone down from the developmental electrode wires to the storage oil plate 2ü and not through a Zv / iachen- ^ • itter limited v / ird. The electrostatic restraint ge ~ Loaded key particles on a loaded intermediate grid i & t not possible here.

All of the above mentioned examples make it possible through the Dividing tensions into regulation of potential of the various conductive elements and thus changes in the Tünungaotickness DOvvie the image density of the developed zcrogra flat images,

It has been described above that the invention can be carried out with a developing material which is in the quasi-liquid state and which is set in vibration. It should also be pointed out that an application in the same way to other development systems is possible , for example for quaai liquid amounts of developer material which move horizontally or vertically or oscillating in a creep shape. Instead of the electrode grid, other conductive electrodes with jooign '.; Teri ü.L'fnungon Ύνν> Ί <Ίΐάνϊ can be used with the same result. Me specified loading

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Drive values for voltages, distances and polarities are only examples, because the invention is within a wide range of such values

The invention was ei games on the basis of special execution examples but is not limited to these. All in Possible embodiments within the scope of the following claims are encompassed by the basic idea of the invention,

109827/1275

Claims (7)

- 23 claims 1,) Developing device for electrophotographic latent charge images, characterized by a storage (30) for a developer consisting of carrier grains and charged toner particles near the image area (10) to be developed, by a vibration device (14, 24) for storage (30) for suspension of the developing agent on the storage (30) in a quasi-liquefied state in contact with the image area (10) to be developed, by means of a developing electrode (28) provided with openings and arranged near the image area (10) with a bias voltage (38) of the same Polarity as the charge image, and by a toner refill device (20, 32) with an electrical bias voltage (40) between the bearing (30) and the development electrode (28) for repelling charged toner particles from the development electrode (28) onto the storage (30) and a Device for inputting toner particles with a charge opposite to the charge of the image to be developed into a Can between üntwicklungseljktrode (28) and storage so that vibrating between image and storage (30) bad tinted carrier granules additional toner particles attract tint zone (34) to an optimum toner concentration reibung3elektrisch and bind _t by the repelling the charged toner particles to the bearing (30) towards Overcome the electrostatic force of the developing electrode (28). 109827/1275 2. iikitwieklunga ν or direction according to claim 1, characterized in that the bearing (30) is electrically conductive and is provided with openings which allow a Hindurehbewegung of clay particles _t but not of grains of grain, j, JMtwicklungsvorrichtung according to claim 1 or 2, characterized in that the bearing (30) is electrically conductive and that a Spamungsquelle (40) serves to electrically bias that is turned to the Entvvicldungselektrode (28) and the bearing (30). _1st Developing device according to Claim 1, characterized in that the bearing (54) is electrically conductive and has openings which allow the Sonera to pass through, but not the carrier grains, 5. Development device according to claim 4, characterized in that that an electrically conductive lower storage plate (20) is also provided, which carries a supply of toner particles * and that the electrical bias is provided by a voltage source (40) is generated, which is applied to the development electrode (52) and the storage platform (20) is switched on, 6. A developing device according to one of claims 1 to 4 dei ^v »characterized terized in that on the developing electrode (20) side facing away from the bearing (30) int provided a storage area (32), from your charged toner particles in the A * 109827/127 5 Tunun zone (34) promoted. 7. Entv / i exercise device according to claim 6, characterized in that that the storage area (32) is also connected to the vibration device (14, 24) so that the charged toner particles can migrate from the supply area (32) to the tint area (34) due to the vibration. 6. Development device according to claim 7 »characterized in that that connecting elements (16, 36) for the storage (30) and the storage area (32) for their common vibration are provided » :.; .. Btitv / iiild-imgsvorrichtung according to claim 0, characterized in, that the storage area (32) has a supply of toner particles as well as this one veibungselektriscl © charge verlo.Uiendö Diemente onthalfc. 10 · Development / inclusion device according to one of the preceding An-Oi »i'iioho, characterized in that the bearing (42) as a j: i. ükfjr with a wave-shaped cross-section auoged i3t, imd daü devices (44) <". iu · Prevention of the passage of voii Totiürtei Lehen through the dor Bnbw solution electrode (28) η" .. "Λν.: ίοη 'LOiLe dieno :; friLi ,;";, (42) vot * ;; e:; chüu are, so that d.le Totiui'tjilchou l.; U; that of the BritwicikLiuigselelctroda (;: '.!), / oil b'; r Qnbf place) bon noroinh dos Vu-rati5bux * oi (heu (32) mf ' f i fi ti 1' 1 K '* ■ fiii-',. »il ·» '' ι ■ '1 It (Vl' ^ 'i'l Γ ιίΜ si - * X IL''4L' III _k > j ί f ,. '' XI ■ J 'ϊ j ·· [LUi VJ 0 -J ik # ^{109 ( 1'7M? 7S} MDOMHW. Blank page