DE2010737A1 - - Google Patents

Description

PH 3028 - 27 / Ba

GAUGE KABOBHIKI KAISHÄ.,

30-2, 3-caoma, SMaomaruko, Qhta-ku, 3? Okyo / Jfapan

«Electrophotographic

The invention relates to an electrophotographic-isolated developing device in which, in particular, a latent image produced by means of an electrophotographic copier on a lightning finalist is developed by means of magic-etigolier brushes

The process for the development of electrostatic latent Images »which are on light-sensitive scales such as & .B * sensitive gemaohtan plates or copy paper means electrophotographic copying directions are generated, can generally be divided into two groups, namely the lump and hate development processes TrcGkenentwicklungaverfahröii is that on the light sensitivity Electrostatic latent image generated by carrier Application of a toner developable «The latter becomes here

BATH 9847/1556

attracted by the electrostatic charge of the latent image, whereupon the image formed from the toner ao with heating or the supply of vapors of a solvent but fixation of the colorant on the surface of a suitable sub-lye, β. B. paper, can be transferred. On the other hand, the toner image developed on the photosensitive carrier can also be fixed on 1h *. Various methods of dry development have already been proposed and used, which are rich in sanitary conditions. "As the toner Sprühverfahran _9, the Xaekadenveff & hear that Hagnetbürstenverfahren that Fulver-8cßwebev" z "? A & riti2 and other very much. The invention also relates to an improvement in the magnetic tape winding process.

When herk8asmlich * a Kc ^ netbÜrettii-Shtwlclcliangsverfanren which is a latent image containing surface of the photosensitive (ßrägej? · Immediately yields by directly coated on a "Kagneten i ^ eblld0t @ h vt * brush. Daraue" loh the disadvantage that in the development image alttele the hard bursts the toner image again by de "light-sensitive carrier is abraded, ao as £ ea distorted, ostracized, or damaged. the herkömailichen Magnetbiirsten-Qitwloklung3vorrichtungen with only one Hagnetwalie is ea äußeret difficult * dan toner gleicfcB & SSIG to the magnetic brush Due to the resulting low charge of the toner, the color tone of the developed image is weak and fog appears in white areas of the image arranged one after the other, so that the magnetic brushes n are formed with appropriate intervals, whereby

BATH ORIGINAL 0098A7 / 1554

- 3 ~ because «the developed image receives spots or stripes«

It is therefore an important aim of the invention to beoaerte iiagnetbüro-latifleklungvorrielitung au create, by means of which smooth, sharp and high-quality images can be developed · SaI) Qi should be applied directly to the Magnet surface formed; © hard brush formed in this way be »that it is the image carrier surface of the photosensitive Carrier-not: coated, whereby a scrubbing emv Abatrcifön dee on the surface generated toner image by the hard burette will be boiled "

Another object of the invention is to provide a very reliable affiliated magnetiburete developing device, which over the hoarding brush formed directly on the haguetoberilUclie a device auiwelot, which is used for actual developing The image is used and bit greater accuracy and more can be raised.

An electrophotographic developing device according to the invention is characterized by a developer cartridge, by a device for forming a magnetic winding brush, by a device for forming a hard brush of excessive thickness so that the hard brush does not develop with a too-developing surface a light-sensitive support in contact, and by a soft brush formed on the hard buret layer, which is sufficiently thick bsw. is high, to reach the evolving zn surface.

The invention arouses an intensification of the developed one Images by enlarging the airing-up remögaxui and removing shadows daduroh, so that a close contact

BATH D09847 / 1554

between dor Bildtraßerflache doo 3 .i «hi; Invent borrowed! Crägers and the Maßnetbürnte guarantee, oir.fcet eats. For this Zv / Gofc, a Knfyietbüreto in the improvised & it ~ winding device on device hard and woicbo buret parts. Thickness and firmness of the flagnotabieflange so that "In a favorable contact" like the magnetic brushes and the TMJdtrHgerflbe can be obtained, but the pressure force is not excessive, the unauthorized on the image carrier surface of the light-sensitive carrier drips off again . ?, \ v & Ki-Jeichtejn öor Aufiinhiae dee Tonere In der Mbrtk.tbüi fit <? and a transfer bs; w. The abrasion pads and one »eUl ff ^ nbiröt vorzugowoiRC are arranged parallel to one another, en dfiR oinnnöei opposing uret parts, inoütoondore hard and soft buret parts, largely interlocking and thereby reducing the charge transferred to the toner. According to the Ei'finduiig dio Bodingunff.crit jMr the opllmole Kt ζ i o'iung the above e.vläi '. Tori on Wijkmifeyn by suitable ο assessment of the distances between bernfojibiu t; rn KuIwJcklunci of the distances is the BiIrHt ^ n and the BiJdtiägrcf loche des lichteapfindlioJien Triig «ro _{T of} the evening parties Kwiaohen the office and the Bürfit ^ ubee: rcn» ungBl'.anten as well as the Abetäode EVfi-Bchtn the brushes and the nagn «licTd" B3grenEern.

Further advantages and origins: · 3riudung result in a proof of the fact that you don't have to worry about it _. von Auflfüliriuigeheiepiele enhfjDtl Λεν Zoichnutig. ~ \ n d.inner i £? t:

Pig. 1 ei> ie ibhni 'i'QTi not a <?: ·. · Execution of the

Pig. 2 eiJio nchotJ 'i-ioioi An Anrdouv <? N ^; ; apreohend Fig. 1,

fig. 3 a üchevbbi al ort e ilihuittcnsicht of a further execution of the EfXinduTig and

BAD ORiGiNAL 0098i7 / 1554

Fig. 4 a. Detail of the illustration according to FIG. 3 i & enlarged Scale,

In the Pig. 1 and 2 are a pair of parallel rerlaufenden in a developer container 1 rotatable magnet rollers 2, 3 available. Along the Circumference of each of the magnetic rollers 2, 3 aind alternately north and south poles arranged. The rollers 2, 3 are rotated in opposite directions. Me roller 3 also runs in the opposite direction the part A of a photosensitive support on which a latent image is developed. In the version described the rollers 2.3 have the same radius and rotate old at the same speed in such a way that each opposite pole (ropes face each other. As long as it is guaranteed that each time opposite pole TuILq of the Walsson during the rotation of the reels opposite,! afc der The diameter and speed of rotation do not represent Walaon aiiaschiAggabeml. The magnetic rollers 2 * 3 become magna * tiaiarbars carrier particles 4 attracted and so the magnate «- brush formed. The toner $ is off the surfaces of the magnetizable carrier particles 4 sucked and received through the intimate touch baw. Hot with these one Charge that causes the toner to hit the surface of the photosensitive carrier generated electrostatic Image developed.

As a particular Herkiaal dar invention is used in education the Magnetburatan on the Hagnebwalaen 2, 3 each one hard brush B and a soft brush cliiclit 0 formed * The hard brush B is arranged so that it is on. the image carrier surface passes without the sinmally developed image to destroy bsrw, au disrupt while those on the hard brush layer B superimposed on many brush layer O

BATH ORIGINAL 009847/1554

the latent image is a very sharp and good image developed.

The la developer container 1 located magnetizable carrier particles 4, through which the color bait 5 is sucked in, are sucked in by the magnetic whales 2, 3 and form magnetic brushes bsw on their surfaces. AuBenbil-BChei O (SIg. 2). The magnetic brushes D formed in this way are predominantly continuous, hard brushes of various heights and are not suitable for use for direct development, since they tend to strip off the toner image developed on the image carrier curse. It is therefore advisable to keep the free end of the hard burebent © He at some distance from the screen surface in order to report contact and thereby the image. To serve the purpose, the invention provides for the brush grating parts 6, 7 for the magnebwalaon 2, 5 'inuen bh dan Hltbolpunktau dar Hugnebwalsen', 5 t> Liii »i Ab / Jband b on where Iu en der oöwae is smaller than άυν Abafeüiid a dor tfalzoniiehno / ui dor Bildbrägerf lache, üo that di. <> Hr) Ho dor Bilpubo is started evenly. In this way, through dlo aegroazungiibeilo 6, 7 over the goaaaben! At the beginning of the Magnobwulaen S ₁ 3 an a / nagnotbrush B / on gialohföriiiger height is produced, whereby during the movement of the greening coilon 6, 7 after the development area A under the magnitude dor tfagnatvalsen, the Zoabrlfugalkrnfb, the Anzlehungakräfbön ewlsohen the opposing tellon of the magnet rollers and similar parts of the Ha? ban office B gioichjsuißlg. In the embodiment according to FIGS. 3 and 4, Z'iuützilch are HagnobfeId limiting plates 8, 9 made of a transparent material

BATH ORIGINAL 009847/1554

the Hagiietbüreteix-Begrezir.uiigateiloii 6> 7 arranged downstream in such a way that on their side facing back in the direction of rotation of the Valsen 2 »5 they are at a distance d, which is preferably about. 1 ism larger than the distance b of the magnetic brush limiting parts 6, 7 _t from the center of the shaft and this distance is slowly poured in the Brehriohtung of the Hagnetwalaea crt; As a result of this arrangement sie. Ulm soft brushes G evenly over a wide area between K and 8 sheets arranged adjacent to one another on the hard brush «

The soft brushes 0 created in this way brush lightly over the surface of the image carrier and develop a kea trastreichee image without any leaks or "traces" of the development process by means of which brushes 0 the toner does not stay on the magnet roller despite the hard brushes and does not come off more in contact with the picture frame, over (half) the distance | - as the axes of the magnet rollers "?, 3 is greater than the distance b of the roller axis" ad dei * leading edge of the Büraten-Bsgrenser 6, 7 "however It is shorter than the distance e of the roller line from the image carrier surface A. The magnetic brushes, which have caused the eating process and therefore contain a reduced amount of the colorant, come into contact with the brushes formed on opposite surfaces from the neighboring Hagaetwmlee. In doing so, the parts forming the oil, hard brushes B are corrected so that even closer contact "with the opposing brush parts" occurs and the developer or toner experiences a more even distribution. In this way, the formation of the magnetic brushes, the development of the image and the regeneration bttw take place during one revolution of the Kögnetwalaen 2,3. Hay formation of the Mapietbrushes «This process is explained in detail below.

BATH 009847/1554

The magnetic rollers 2, 3 are driven in opposite directions, so that the developer or toner is applied to the image carrier surface A by the magnetic brushes 0 in two directions. Thus, the image located on the image support surface A is developed both in its direction of movement ale as well as opposite to it, whereby the disadvantages of a one-sided development are avoided. The image is finally developed in the opposite direction, as the circumferential movement of the last magnetic brush C opposes the light-sensitive carrier A. The adherence of magnetic particles to fiber-sensitive carriers is therefore considered to be a minimum amount of moisture, such as scattering of the developer. Tonore, which poses a problem with herktimBlichon devices, is in the case of the invention by means of the IMireteu-BogrenEungnplotten 6, 7 and Iingnetf eld-Bt'grensungfji JUchen fl, 9 acting in oingosclirUßnkt diminishes the loss of head devices.

will around beetioiun Verntondnio of the invention the ki elling of the individual parts of the "invention-geuiaflen Iuutwioklungavoirichtung ?! ¹ orla "iori;. Tu oußßodehnten Ver-Guchcn wurdo font.ßootellO, <3aß <\ m / ibßtand b awlBchou der Begroiifitmgnkanto dfio Bofp« ^^ ungfib.iccJii. ' and the roller axis in front: MigBtfdiae lila vn 2 ran kleinor int el β der. Abfltand a awl see V / a 1 v. fin ach ae and IH ldträgf-rfll. '<he Abalnnä c ao is chosen that it lies ii weaentliolnm awii-nhen P, n and 3b. The borders are arranged at about 90 ° in front of the image carrier area A in the direction of the fronts, so that the soft ones Brushes 0 at the N- with V- poles of the magnetic whales 2, 3 can clear up under the effect of centrifugal force.

BAD CRiGiNAL 009847 / 155A

of less than 90 ° around the jacket or on the circumferential surface of the Hagnetwalae (ed. 2, recfots) is arranged, reduced that exerted on the sheet metal by the magnetic brush Force in an advantageous manner · Bsi an arrangement of the boundary plate a at an angle of more than 90 ° , öo that the magnetic brush was sure to eat it

sweeps, the following erection of which brushes 0 let simplify * If the Hagnetföld-Bagrimsraagableehe β, 9 "are arranged setsst against the Büratenbegrensem 6, 7 by about '' to 2 aa uei *, is achieved by a gleiohal £ lgü» s do dense and continuous straightening of the soft brushes without impairing the hard brushes B, which therefore do not come into contact with the image carrier surface. Distance d between the Harnetfüld-GrenzurigeblBCiii δ bntf «9 and the Hagnetwalssenachse increases slowly in the direction of movement of the Hagnetwalae 2 or 3» so that the forming soft brushes 0 are always radially upright and not put backwards or report flat.

The invention thus offers the following advantages ©. Bank of education ain © r hard and a veiohen Burstoaaehlohi; On top of each other on the Magnetwals © only the Weich® Büa> · ate Ö in Barühning comes with the . developing image carrier surface A of the light-sensitive! Erägera, wodursh eiia high-contrast image without Eatviicklungsiaale ersslelbai? is. Hard office chic B does not come into contact with the image carrier when it is old, so that the developed image is neither rubbed off nor cleaved. There is also a © Ansah! Hagaetwalsnan arranged in such a way that the poles of one roller. Poles set up in the past stand in their neighboring waI ^ a, so that the hard and soft brushes in the gap can see the orphan attracting each other and iaeiaan "derkäiaaen, whereby the batwiofler is moved and charged.

BATH 0098A7 / 1554

Claims (1)

Claims Electrophotographic developing device, characterized by a developer container O) ₁ by at least one device for the formation of a magnetic developing buret, by a device Bur the formation of a hard buret (B) by Iftoke so that the hard brush (B) does not With an image carrier surface (A) that is too disgusting to the full, a light-sensitive carrier is in contact, and through an office (C) formed on the hexagonal bureau sole (B), which is thick or high enough to accommodate the pifioha to be developed (A ) to reach. 2, device according to. Claim 1 "thereby geke η η -κ ο ί C h η ο b " that d: ia Vorrichcung for training einnj? Hegnetburete »a rotatable multi-pole magnet waJ.2ü (H. or 5) aib along its ci l / nfeng alternately arranged N and S poles Iat. 5 · Device according to claim 1 or 2, characterized in that the Yorrichtung for the formation of a herton brush (B) such a opposite the JTmfang de; ¹ HagnetbUrets arranged boundary plate (6 bzxi. ?) Lut, because B it granat the hard Bure te (B) to a böHtitranti height (d), which does not bit on the to be developed »Ulriche (A) de & lichteapfindllchen PrUgerö hereurdich <;. BATH ORIGiNAL Ü098A7 / 1554 4. Apparatus according to claim 1 or 3, characterized in that g θ k e η η draws that the device for the formation of a Kageetbürete is a rotatable multipole Wagaetwalise (2 bsw.;)) Sit along its circumference alternately arranged R and S poles and the soft brush (C) underneath the resulting effect from the magnetic l & sietnmg, the centrifugal force of the magnefcwalae and the attraction opposite pole is formed. 5. The device according to at least one of claims 1 bie 4, characterized in that the device "for training ^VOA Hagnefcbürsten least one Eaar rotatable multi-pole magnet Waleen (2 _t 5)» tt along its üsrfaug. alternately arranged N and S-Ppler iet, that the one magnet roller (3) des Fatres an it & 2? ss? The surface has the same direction of movement as the sensitive carrier (A) and the other waIrθ (2) shows the most opposite movement and that when the pair of whales (2, 3) rotate, opposing legs of the orphans face each other, 6. Electrophotographic Eafcwicfclunßs device, characterized by a Entloiclerbeha *.! - ter (1). by wenigsteiiß a rotatable Hagnetwalße (2 * r. b 3) nit a AnEaIiI along its üjsfaßft-alternately arranged H and S PoIe by Magnetbürßten-Dogrenuungeeinriehtungea (6 _S 7) for limiting a on the Walce (2 or 3 ) formed hard brush (B) to a height which does not reach up to the developing image carrier Iac he (A) of the photosensitive carrier and through a soft bureau holder (C) on the hard brush (B), whereby half the distance (^ ) between the axes of the Hagnetwalien (2 _t 3) is smaller than the BATH 009 8 47/1554 - η Abetand («) between the axis of the roller and the to developing surface (A) of the photosensitive support, so that the magnetic brushes (C) fit into one another as they revolve derkäramen. Electrophotographic development device, characterized by a developer container (1), by at least one rotatable magnetic roller (2 bw. 3) with a number of H and S poles arranged alternately along its circumference, by opposite the surface of the magnet roller (2 bw M. 3) formed & gnetbürete (B) arranged Büratenbegreneungeeinrichtungen (6,?) aur limit d "r height of the brush (B), thanks to which this does not match the% u developing BildtrUgerflache (A) einee liebtonupfindlicJaen TrMgere in Berüiigeiangt, and Maeiietfeldbegrenfcungeeinrich- (0, 9) «over a magnetic brw. Magnetieierl) oren Mater! «1 for the prearranged formation of gloichmfissip * er, poet and eicli advancing, erecting, soft rUrates (G) tivf the hard burnt cnuchlcht (B). 0. Vcn richcuiif wenißotenö according to Anayruoh 7, thereby gek c <η u 2 ei chnot; , drß iHc leading edge of fi6t * ^ j € itfeldI) eBreii £ ungeeinrip.b.tunt ': (l>, 9) aur ilchee dei Hspnetwrtlrf (* ί :, ⁷ >) one size in - u i.bntnnd anfweiöt ale äi <Vord ^ rl: ant «der Iiiir.'iienboprei ^ ungweini'ichtnmg (6, 7) and daft der ^ l-ru ^ nd dor ils [4iiiii ί t 3ol egTor-j-ungDG (G, 9) from the Ußlzonof .lxe in the direction of rotation of the ze (2, 5) »uniitmt. BAD ORiGiK ¹ AL Empty soap