DE1423733A1 - Electrostatic copy pad - Google Patents

Description

19.S.i960 - Sa / Schi. ~

AWAY. Dick Company

* jSlektrostatiache copy pad ⁿ

The invention also relates to a copying method and Sieiuerite for the practical application of the same, lit special η, the invention relates to a dry copier method, in which electronic principles sub obtaining complete reproduction of designs that relate to an original sel {K * n, to be used with no limitation in relation to Characteristics of color or light absorption.

The aim of this invention is to provide a new and improved tea Copying methods as well as Kienente for the practical application of the same.

More specifically, let one aim of this invention be one To demonstrate and lay down the working method for the production of copy documents which are suitable for receiving and retaining an electrostatic charge in turn for the formation of an invisible image on the Cberfloche of the copy path and for the use of a Such an image is intended to serve in the reproduction of an uterine and leobar copy.

Read and Other Objects and Advantages of This Invention are disclosed below, and sun purposes of the . {. «But not the limitation, is a representation ^ roped the invention in the accompanying drawings,

o of which ao

ο Pig * 1 a cross-sectional view of an electrostatic * ° represents image cube electrode of a transfer tube, besides »copy paths and elements, dl «In connection with the execution of this Invention are needed. BATH ORIGINAL

Fig. 2 is a view perapektivißcho, teilweiaw lffl section, illustrating a Kopiorbahn that the electrostatic charge of the image throw "I ttktrode an electrostatic Drill receives to produce άζζ unsichtbai'e image thereon, and

Pig. 3 is a perspective sectional view of a copy media represents that the image reproduced on it carries a hidden image to be a legible copy to manufacture.

In Fig. 1 of the drawings, an electrostatic EÖhro is first explained in cross section including the construction of the image cube electrode, also copier track and the method of working for the treatment of the same in the practical application of the invention -The tube urxTasst an evacuated Üishüllung (io), in a cathodoluminescence (12), sine control electrode (14) _t eino ODSR BonchlcünigUiigselektrodo (16), a Foira & iersptile (18) UIID eina Ablsnlcspulo (2o) incorporated siiid. The E (12) iot connected to a negative potential of the operating voltage <iuelle (22). Signals are fed to the Intonsitdta «ateuer-öittar τοη a current source (24) * Ausßcrdon are deflection signals from a deflection signal source © (26) to the deflection coil (2o). By means of a voltage drop resistor (28) the necessary positive drive potential is brought to the \ node (16) and the focus oropule (18). In practice, the anode (16) is at Uase potential.

The image cube electrode comprises a front plate (3o), the on anode potential. OostÜtat in a slot in the Front panel is a Mehrs & hl from isoliorton DirSh'ten (32) * Each of these Drölite is from einom.andorati

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trimmed by Iooliennatorial, boiopielsweiae glass. Bio Iu-seams are ao mounted, dnos calibrate an endo through each the iiusoere l'ront of the tube extends preferably so finished «iat, dacs ei» essentially flat auHlüuft, εο daeo the Kopiorbahnen (34), which with a dielectric transmission ciaaBae coated bind, iaö'clichot close to the ends of which wires can be passed, the ibroraeito in a column or in columns are constructed to absorb the electrostatic charges lim. An outside guide aatab or Lcitor (36) eats with the anodes through a voltage drop resistor H vorbundon and extends at a parallel distance on the column or the columns of the 2) frame end as Maaso ladder.

In the course of work, the cathode ray beam is weloheβ emitted from the cathode, from the deflection signal source bent to reach over the wire ends, which extend within the bore «Ob o in wire with high electrical energy or not, is determined by the intensity of the Steusroignalc » DtiiKat, soft at the time from the signal source (24) are received in which the electron beam ße # en don concerned wire is directed. *? onn the distraction 3ignalo and the intensity of the control signals sent by eitieia Appropriate defenses must have been received, for example from a Pakaiailo Abtactor or a Fornsahkainera, are sufficient, and if the copy paths (34) with an aychronioierte vertical Abtaotßeachwindigkoit are moved, a load mower will be on the surface

fplffönd : 1er copier beans deposited, which if oils nacljüntivic have been to produce an oichtbareo image of the original, being well known electrostatic Bntwioklungeteohnikon can be applied.

It was found to "do playback" of a copy

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good quality is desirable _t copy tracks to verwandor. soft, to be capable of receiving the charge transferred directly from the wire row on the surface of the copying tracks, and daoa it dea "Eiteren wünechenawert is to hold the charge on the surface without scattering by the ßοpierbahnen through or without spreading to the adjacent surfaces of the JCopierbahnen.

For this purpose it iot desirable to make the copying valves' (34) having a surface (4o) which is in turn formed from a continuous film or a geringtT of an insulating dielectric material conductivity existing coating and having a Grundeohicht (42) what good idiosyncrasies beaitat. . -

A circular track can be related to a highly conductive metal foil, for example made of copper, aluminum, steel or the like. "If a metal foil is used in the form of a metal sheet made of torrate or fallow" it is desirable to use a foil "which is at least a minimum thickness of. o o364 mm t o, o38 mm beeitrt "however, a JPoli" gröeaorer bead hei certain applications benutet there, "where dl · flexibility is not an essential requirement. Instead of * ± mr metal foil, “less expensive materials can be used, such as ier or other porous foils made of cellules” ede? CelluloeederiiTütärt, yalls Äasebändlcoit in connection with flexibility and the lower H of pier is desired, one can also scatter paper and use sine motallfoll “of minimal thickness. Decision "Speaking of availability, low Xoβten and the light is Umgasg dl" subway hergaeteilt (42) Tortugeweie of paper, what ·· if "s in ä, 9v later

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described Wolee "treats iat, represents a Gruadbahn, the not only restricted electrical conductivity, but also wenisor sensitive to Iat Changes in relative humidity. 3a was found dttS8 the quality of the on the surface of the copy paths reproduced image in strong Macao ve «the * «Lettriochen and conductive properties of the material

hüttgty auo deffl hurries the opierbahnon bergest / "erden" wonn die Basic offices from the standpoint of their electrical conductivity are insufficient, copies will be of inferior quality jJrodusiorfc, aelbat if materials that are the highest dielectric insulating properties on the Surface »are intended to reveal the charge that is hidden there Image (46) generated to record. The conductivity of the Paper base web can acin change from day to day. It depends to a great extent on the relative humidity from, or from other atmosphericη conditions that exist at the time the copy process is executing vj ir J.

£ in troalichenea Hertanal theoer invention reads in dian Hittoln, ait which a copy of good quality by J. regardless of the .j & ^ :! ~ bonded conditions, ei? id. Ed became gofundop, because a 7th opaque quality can be dependent on it, that ulo, regardless of pouch quality, is reliable, call the base sheet of paper on which the dielectric layer is applied, with a proportion of ttues or graphite, preferably in equal concentration and distribution therein.

£ 3 iat desirable to use a Uonge of ruAA or graphite meeting the specific Wideratand the GruMdbAhn significantly reduced \ odor wolche dlo Lei ui'uhi ^ - ness keeps more complete them on "high inemrelativ stand at

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? euchtigkcitogonton au a maximum of Ιοο '/ ί or bid to a minimum of 1o £. The desired amount of Ruas or graphite corresponds to a concentration which is capable of essentially connecting the particles to one another in order to provide for a conductive Veg through the papior hii-duroh. Usually, an amount on the order of 0.5 to 5 pounds per cent weight of 5-sheet paper base will be sufficient. More can be used, but it is undesirable to use an amount of runs or graphite which causes substantial discoloration the paper odor of the intended imprint leads. Dar ruos or graphite can be incorporated into the pulp in a uniform distribution in the paper base sheet by incorporation as a component from which the paper base sheet is produced in conventional paper making machines. On the other hand, the carbon black or graphite can also be introduced into the paper base web after it has been produced, for example by impregnation or coating with colloidal graphite or hues, which are present in dilute concentrations in aqueous solution, such as in the ⁿ aqua dag ¹¹

The copy web, which is made of a single paper base web with a surface layer of well-insulating material, the buss ^. : "'■'. '. Or contains graphite, is suitable for use and produces good quality copies with, if any, small changes in copy quality, regardless of the presence of humidity conditions, which can range from high humidity to exceptionally low relative humidity odor of Parbintenoltät. in other porten, the conductivity of which is incorporated into the base paper web by the incorporation of graphite or Buss, shakes the influence of moisture on the conductivity of the web, so dasa gleiohmässige Blldungsiaerkmale in the described eloktrcstatischen playback process are obtained ·

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The paper base to vqt- 1423733 ⁷ ~ mend, ah, to

Another technique that can be used, inter alia, to bring about properties in the web during the charge, trantiportoea, and dice independent of moisture, consists in the fiückaaite of the iüela & trisch beechiöfcteten paper base web with alcohol or ffaseer or a Moisten mixture of alcohol and VVaaaer, just before the charge is deposited on the passage of the Ivopierbnbn between the wire row and the Maaseleiter. It is plausible that the alcohol has the effect of extinguishing the discharges. Such rapid dissipation of the discharge between the wire ends and the dielectric surface results in improved dissipation, since the discharge zones are smaller and more clearly demarcated than other alcoholic alcohol has a high dielectric constant, which increases the capacitance between the cover layer and the conductor elevated.

The amount of alcohol and / or Wasoera used by nan should be large enough to make the surface of the base web moist, but without being soaked. The liquid can be added by means of a sprayer, but it is preferred to make the orbital movement by means of a hollow (40), which is preferably covered with a nboorbiorcnding boepann oil, and soaked with the liquid (50) for transferring it to the IUlckaeite of the paper ^ round web (34) ßerad before dleee enters the loading section ($ 2).

The alcohol and the water evaporate quickly from you paper run-in in the white that all traces of it are verachirujadea, but not before the round paper-copier tracks the loading section (52) and the following decay to dust the loaded tracks with color particles the one opposite have electrical charge, and to

'tion of the particles In the sections of the have traversed unshakable eggs, the

₍ achieved by heat or bonding, beoohleuktigt tie

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Heat applied removing the hate and alcohol used in the y / eise so that a dry copy of good quality and strength is obtained.

Ln Arbeitoproaeeo the prepared copy tooth riiokt in continuous lengths between the wire row (52) and the Maso leader ”. This advance is chronologically synchronized Movement with the scanning of the original »to a charge from the wire row in the image cube electrode su to transfer the dielectrically insulating layer of the adjacent copy path.

The li ^ dungßiauster (46), which is deposited in this way, to a Creating an invisible image on the copy path is held to the surface until the image is reproduced is and is available, as iait by dusting a powder, a pigment dye or a colored one resinous powder that has an opposite electrostatic Have charge * The applied image can then can be fixed, for example, by applying heat or pressure or steam or combinations thereof in order to create a visible Image (6o) available as a copy.

If the copy web is formed from a base web that contains rues or graphite, the webs are after the fabrication are introduced can inferring compilation be used t

Beleplel 1

3-5 weight? ' «Aqua dag" (4o # graphite in watery Dispersion)

The foregoing means can be as in a roll coating method be applied over elno odor both sides of the base paper before application of the dielectric coating. A size,

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corresponds approximately to 0.1 weight / »dee paper included in the Ctrundbahn.

Thereafter, the dried web can be coated on one side with a composition containing the desired film-forming dielectric material, «Ie ea is expressed, for example, by the following formulations, t

Example 2

36.52 oil-modified alkyd resin (5o # solids in

Xylene - Aropias 7424 from Archer-Daniels, Midland)

12s Cumaronhare (Piocopale 1oo - Pennsylvania Industrial

Chemical Company)

£ 21 xylene

£ 50.5 barium sulfate

Example 3

16.7 ^ vinyl chloride - Tinylazetat - liischpolymerioai 16.7 5t barium sulfate 33.3 Jt Aatton 33.3 * xylene

The application of one of the afore-mentioned transfer tango settings can be carried out by means of a conventional observation process by laying an even layer over the base sheet in layer weights of 4 _f 5 to 16.3 g / m (3 - 1o pounds per 3ooo eq.ft.) ^ίβΓ surface, followed by air drying or drying at elevated temperatures voraugsweise of 5o ° to 12o ° C (125 - 25o ° P) _t su accelerate the removal of the diluent.

Instead of the means mentioned, a film can also be used

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Polyethylene was used a a, dor over one surface Gruadbahn is layered.

i'ami one OINC iTtioaigkeib used such as and / or alcohol, the un Riiökeelte the Kopierbaliü humidify eats 30 unnecessary to use eino web containing or other in their preparation graphite _# RUAA "electrically conductive ISaterial since in the Moisture or alcohol brought into the web contribute the desired properties. 7 / ie in Fig. 2 of the drawing, the liquid is sprayed on or applied by means of a roller-shaped coater to the rear side of the web just before it enters the area between the wire row and the idasa conductor. The image web is then moved through a training device (56) where it is exposed to colored particles having an opposite charge, these particles being directed to the charged parts of the invisible image. to be attracted to the railway. The web is quickly guided by the Beütäubun ^ aaonö to the Pixiersone (58), where the colored particles are held in order to give a permanent image on the surface, for example by means of heated v / alzon, between which the web passes or by a binding technique that uses heat or a solvent.

lian understands that the features described are cur increasing the propertyon of the webs take effect to record the electrostatic image regardless of the prevailing Jhumidity conditions or independently of the properties or changes in properties, which were originally in the base web on which the dielectric layer was erected became.

At 3tollo de »use of carbon particles or aea Moisten the back of the copier track with water,

BAD CP: SjW / »» _;

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Alcohol or MiocUun ^ eii of either lies another . ■ .- ,. • kraal of the invention in dor treatment of the? A ϋαίιη, including an electrically conductive paper to ran, The dft3 oinone electrolyte contains a water-soluble electrolyte monovalent, bivalent, trivalent or multiple words Metal salts used for ionization in aqueous media Medium is suitable. The water-soluble salt can be incorporated into the paper towel All constituents of the sludge are the basic paper web will be produced. However, it is preferable that the lüoliche io'nisbaren Gala by suitable dea finished paper to bring in «For this purpose can the salt in a solution in an aqueous Hödiuta for Inprttgnierung dea papictrnoinßQ "be required, how theea, by means of a conventional shift or line-up process is executed, e.g. with a dip-spinning process (dip squeeze process), a whale receiving process, a SprÜhschichtprozees or the like, in which a naso method is used, where the salt is is in solution, the following is a comment indicated, which one in the treatment of conventional paper base webs sum purposes for later use as copy paths can use s

Example 4 *

Io weights- ^ Potassium chloride 88 weights-, * water
2 weight ^ butanol,

Example 5

20 Weights - Potassium Chloride 78 Weight-? C ü Cup 2 weight ^ butanol

In the above formulation, the amount **. ÄÄiumchlorid

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Or another water-soluble ionizable salt between 3 weight-> 6 to 25 or 3o weight-; £ for the infusion of the salt monies into the paper base. Butanol is not essential in the treatment of disease, but it does little to help. Penetration of the wrapper in the Paplerßrundbahn with and aur even distribution of salts through the base sheet. Instead of butanol, you can also use other alcohols such as propanol, laopropyl alcohol, ethanol or other polyhydric alcohols such as glycol, ethylene glycol, glycerine and the like.

Instead of potassium chloride can also be one among the following water-soluble, water-resistant, ionized * Use cash Ketallealee in an amount from 1 to 23 weight ^ of BehandlungstusaramenettBUng ι ¹

Barium chloride Copper sulfate Ammonium ferric citrate Ferrous sulfate Hatriuaaulfttt. AlUÄiniutosulfat ν * Xalium Nitrate

arbo Per ^ ioitrate, Küliumphouphat Xalitimbipnoophate

Sodium biohrooate

■ ψ-

He can assume that it is sufficient if one of these additives or mixtures thereof is present in the paper base web (42) in an amount greater than 0.05 livestock. More than 1o weight -? * Can be introduced into the basement, but the increased costs are not justified by the differences in the results,

The copier webs (34) »which are produced with a surface layer (4o) made of good dielectric insulating material ¹ from a paper base web (42) which contains the water-soluble, water-resistant, ionizable salt, can be used independently of the prevailing moisture conditions, ie regardless of high humidity to particularly low or relative humidity during the copying process to produce good quality copies with, if any, small change in copy quality or color in tenai. In other words, the high conductivity that is permanently generated in the paper base web through the combination with the water-soluble and ionizable salt, neutralizes the influence of moisture in such a way that uniform and good formation characteristics are obtained through the electrostatic folding process described.

Another technique that can sur nutrition can apply the electrical conductivity of the paper subways to make Regardless of the copy web against the ruling Feuchtigkeitobedingungen, is to treat the Papiergtrundbahn with or without the described 'salts in it, the paper subway a ⁿ Feucbtigk "itebinder ^H add as a component. As used herein, the term "high-density blender" is intended for such material as polyhydric alcohols which do not readily evaporate when all atmospheric conditions are cast out. There was also a lot of oil, sorbitol, and more. literal alcohol such as xthalene glycol, polythene glycols, \

,.: ■■ ' BADORlGlNAt

. 80 · 80Β / 0830

TriEthyleneglyliol and the polymers of and observations thereof.

The treatment of the paper base web to accommodate de α Fouehtigkcifcsb. In the meantime, the Hörοtellur ^ dor ilrunäbahn is preferably achieved by conventional Böhtuusss- or Iißp-rügniorungamittol »Such means are given in a dipping process (clip sf {.u3öse proceoa) aXnem toalzenbeschicliturigepro & esa, a spray layer process or a similar layer process In the following, the formulation of suitable triggering statements is given, which can be used in the practical implementation of the invention.

Example 6 25 (te \ slchta «- $ glycerine 73 Get stra- $ Waaser 2 am iichts- ^ butanol BaiapS ^ el 7

25 Sewicfets »^ Ätbylengl ^ kol 73 Gewich.tB * ^ i water

2 weight- ^ butaraol

48 S> 3Vioht £ - ¥ 9 water

2 5i

€ 5 C

BAD 0Ri <3! NAL

will take up both, nänlioh a water-soluble, water-resistant, lonielbarene sale of the type described and a moisture binder that then the Combination of the components In a single step the treatment of the paper base can be vie they stated, for example, after lot χ

Example 1o

24 weight-jC Qlysserin

1.7 Gewichtö-jS eirelbasiechee sodium phosphate 69 weight -? * Water

4.3 weight 8 ~ # n-propanol

• Example 11

25 weight- ^ glycerin 65 goweights- ^ barrels 1o weight- * potassium chloride 2 Gewiohts-Jt butanol

During the treatment of the circular paper web by introducing • Ines moisture binder, it was found that it was sufficient. if the amount of moisture-binding agents that remains in the ground is exceeded, o, 1 o used "-? (but let it be said that about o _# 5 to Io of weight are redeemed in it , for the introduction of a freedom of opportunity a new yoreusehen, the larger "lit 10 Gewlohte- £ der ^ aplergrundbehn" is.

Let go of the gate, the electrically insulated, isolating one! (4o) goes beyond the paper base web (42) only after its treatment of the binding of either the water proceeds llohen _t wasserbettlndigen "ionlelerberen Be« «β or dee yeuohtigkeltsblndere or Kieohnngen daron aneubringen, j Jodooh rersteht" loh "that eolole BthandlungeZusaMÄeneetsungen for impregnation aut the back

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Paper base sheet does not take effect until the Application of the dielectric, insulating rail follows.

A number of other materials similar to polyvinyl acetate are not equivalent and are not equivalent to one another, can also be used as dielectric insulation, rendeo Material Terwandt are in the form of a coherent Layer or such a film (4o) on the Basic track (42). S.B. Excellent results have been obtained with thin pendent layers made of Polyethylene or shellac, a microcrietalline guard or old to a similar or ulmodified tone. Harss of the alkyd type, or with a combination of one Patroleumkohlemtaeeerst ^ fffcarEes (Picoopale), a Alkyd resin (Aroplas) rad Barlum sulfate «Auoeer here still in £ rag, © kommesöea. Kat @ rlallen kBnnaa such are related » as indicated in the following table:

Bitroselluios®

Natural lag «® and derivatives ChXoTkaiutoc'fi'.ik
ο; Stelxifcdhlenteerharee

(Piooopale) shellac

ö Polyaer lgationaharge

Polyvinyl chloride
¹ polyvinyl butyral
Butadiene-styrene *!

1Λ23733

Alkylaoryle acid ester polymer Polyethylene

Condensation batch

polyester

Epoxy resins

Organosilicon polymer

The following typical layer composition a. are formulated from the aforementioned materials for use in producing the desired dielectric insulating layer (Ao) on a suitable base sheet (42):

Example 12

36.5 * oil-modified varnished alkyd resin (5o * solids

in Xylene-Aroplaz 7424 from Areher-Daniels,

Midland)
£ 12 Piccopale 1oo - Pennsylvania Industrial

Chemical Company (a diene-olefin-petroleum

Hydrocarbon harbors)
21 t xylene
3o, 5? T of barium sulfate

Example 13

67 j> weakly oil-modified es Alkydhars (5o '> 6 solids in xylene ~ Aroplaz 2922 clay Aroher Daniel Midland).

13 1 * melamine formaldehyde dryer (Resimene 875 from Monsanto Chemical Company)

2o i, xylene .

Example 14

£ 15 ithyl cellulose 85 + alcohol

Example 15

17 % shellac

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66 # ethyl alcohol 17 % barium sulfate

Example 16

17 5 »polyvinyl acetate 4 Jt lye (26 ° Be) '79 £ Sasser

Example 17

74 ^ polyvinyl acetate (55. * Fa et stoffe - Heeyn 25-1251 from National Starch Poducts Inc.)

(Emulsion type) 26? 6 Wa3sor

Example 18

2o Jf Polyrinylazötat (Gelva 05-V-16 from

ShawinigaQ Hesins) ' 80 ^ ethyl alcohol

Example 19

0.006 to 0.013 mm (1/4 to 1/2 mil.inch film) made of extruded polyethylene

Example 2o

Piccopale I00 barine sulfate 585t xylene

Example 21

16.7 j * YinyJchlorid - "Viny laze tat -« iachpoly-

merisat (Bakelite VUCH) 16.7 ^ barium sulfate

33t3 ^ acetone ^

33.3 t xylene.

Example 22 25 % butadiene-styrene-alcohol polymeric acid BAD

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(Pliolite S-5JD from Goodyear Lire & Rubber Company) xylene

Example 23

11.4 # cellulose acetate 28.6? $ Methyl alcohol 57 _t o # acetone
3, o; £ tricreeylphoephate

Beiopiel 24

39 _f 2 ^ epoxy resin - 6o * Feetetoffβ (Resiwold 142-20 Part k from IkB. Fuller Comp.)

39,2j £ hardener ~. 6o ^? Eetetoffe (Eesiweld

142-20 Part B of HB Puller Comp.)

21.6fC diluent

Example 25

19.5 ϊ ^ chlorine chewing β ohuk 8o, 5 Λ toluene

Example 26

11.8 # polyrinyl butyral (Bakelite XTHL) £ 88.2 ethyl alcohol

Example 27

87t5 £ styrene-ethylene-polymoriaatdieperaion

(Duck Waeaer

* °. (Enterprise Paint Company L 1744 E)

»Boiepiel 28, -

ο .22.2 $ i polyaorylate (Kona A Haae - Acraloid B 66) * ^W 33.4 ^ xylene

11, oj6 ethyl ketone 33.4? Ί ethyl alcohol

2ο

• The aforementioned typical formulations can be modified to form suitable pigments like them Barium sulfate represents, which is the isolation property or do not adversely affect the insulating and dielectric properties of the layer. Such pigmentation the layer is desirable in order to obtain a less smooth finish and thus a better writability of the copy, for example with a pencil, ink or the like. If a pigment such as barium sulfate is used, It can be used in quantities from τοη 0 to about 5o ffeweits-jt des Solids contents of the layer are used, preferably in an amount within the order of magnitude of 10 up to too parts by weight to 100 parts by weight of the dielectric materialβ

The application of one of the above-mentioned layer compositions can be carried out by means of a conventional Bosch directional system. across the Urundbahn in an order of magnitude to form a layer weight of 3 »25 to 16.3 g / ia (2 - 1o pounds per 3ooo oq.ft.) of the surface zone " The certification came through an immersion layer process (as in front) are achieved, a Walsenbeschichturgoprosees, a Str & aungebeeohichtungproseae, Luftbeschicht - method or Sprttheohichtverfahren »around the desired sliding weights received followed by a Air drying or drying in a drying process low tea eratus? from 5o ° to 12o ° E (125 ° - 25o ° P), to speed up the removal of the solvent

If a paper base web is used, it is desirable to use a calendering web that is over Features a casein latex son sole when using one dialektriechenschichteuaammonset «ung is used, which in turn is formed from a solution as

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tion to avoid excessive absorption of the layer in the To prevent paper and to effectively close the pores of the paper to thereby avoid the loss of the deposited charges through the base path. lower it to a minimum. Am suitable paper with a basis weight of 78.2 g / m (4β pounds) manufactured by the Crocker Burbank Paper Company under the grade designation 9o4o ~ 7. For layered sea seed settlements that contain an aqueous dilution it is desirable to use a paper which has a clay-casein layer and which is also calendered, ^ in order to hold on well and to cause less absorption on the base sheet. A suitable one The basic web is that of the Grocker Burbank Paper Company No. 9o65-7. -

The prepared copy path is used in continuous lengths "between the row of wires, the image, forms a cube electrode, and leads the ground conductor behind it through it. The transport takes place synchronously alt the scanning of the original to add a charge of clay to the wire row in the image cube electrode to the dielectric, isolated surface of the neighboring copier balfh g transferred to.

The ChargeBBUster (46), which is so depressed, in order to produce an invisible image on the copy web, it is recorded on the surface that BL3 is reproduced and made visible, for example by dusting In the? ffiedergfcbfzone (56) with a powder, a color or a resin powder, which carry an oppositely directed electrostatic charge. The angry BIl ^ can then be fixed, for example by applying sound Hit * «o4 ^ r pressure or through Dcml> £ rereohmels9ng o4« r through Combinations of these to create a visible image as a copy

"$ §R l4 ^« ff <i ^ | \ & \ PU «r Bring. K ^s ■ bad original

4iel "ktriache, isolating" "frierla !, that as a layer

-22

or film is used _e contributes effectively contributes to verschlieosen the pores or otherwise, the dielectric layer (4o) against the conductive base web (42) asu isolate the charge on the surface of the dielectric material be recorded and an image scattering by the conducting To prevent base path through it. The dielectric, insulating layers described also act in such a way that they prevent lateral migration of the charge, which on the other hand would spread the charge and reduce its concentration. This would lead to an image with lower resolution and sharpness an image with less color intensity

It is known that coated paper has been manufactured earlier. In contrast, the invention disclosed here is based mainly on the features of a combination of materials for use as copy paths in the electrostatic image reproduction process and in the image path obtained thereby. One can understand that "changes in the details of the construction of the device and the method of operation can be made without departing from the concept of the invention as it is defined in the unity in the following claims: _#

Claims (6)

Expectations 1. Electrostatic copying web, characterized in that it consists of the combination of a base web having good electrical conductivity and a surface layer adhered to the base web and susäasen on the same side of the base web expands and dl · further consists of a film-forming material which has good dielectric »insulating properties to prevent the passage of an electrical charge from the surface of the insulating layer through the base layer and which creates an invisible image of a 809805/0830. bad g electrostatic charge on their dielectric, insulating surface. 2. Electrostatic copying web according to claim 1, characterized in that the base web is a thin sheet of metal which has electrical conductive properties rerules. 3. Electrostatic copying web according to .Anopruch 1, thereby · characterized in that the base sheet is a paper base sheet, the latter having good electrical conductivity and being insensitive to changes in the relative humidity 4. Electrostatic docking track according to claim 3, characterized known that the paper base is electric Has conductive carbon particles. 5. Electrostatic Kopierbabn according to claim 3, characterized marked that the? paper base sheet contains a moisture sbinder. 6. Electrostatic copy web according to claim 3 »daduroh characterized that the iapiergrundbahn an «water-soluble, water-resistant, ionizable Metalleais contains. 7 · Electrostatic copy path according to A / tspruch 3, thereby It is known that the paper grunibs the combination of "wipe one" and one water-soluble, water-resistant, ionizable Contains metal eel. β. Electrostatic copying web according to Claim 3, characterized in that the rear side of the? Apitrgru {) d \> ahn ■ 1t of a liquid that is moistened 80990 5- / 0830 Alcohol ηηά mixtures bfervoa consists « 9 «Slektroetatisehe copier web according to claim 1, characterized daeo the film that one. Material with good dielectric insulating Properties forms ?, polyvinyl acetate 1oe Slektroetatiscäe ICopierbahn according to claim 1, • thereby, germinated © lean, that the film, you Material with good electrical insulation Properties forms »Polyethylene iat. Electrostatic copier track according to Anepruoh I ₉ • dadUFclt eekea & seichnet «the'Pils _t who a material with good dielectrically insulating ^ loads« an alkydhore solder. Sopierbahn föaclr «claim 1, daee & ** τ film, the one with § * at @ ft dielectrically i & oiierenden hilüet, ei & e £ & d (bination of a tins es Atiapruon 1 # Film that eic Material with gu.tc-.n dielectrically insulating Bi £ 9üBcia & f tv & forms »a microcrystalline Waeha is» * ■. füektvo9tatä @ 9he Kepierbshm Bash claim 1 _f d & d & reli gsk ^ is ^ lühiäet «that the film which forms a UatsrlaX with: gutsn dielektriesis isolating . <ι , a Seiiellaek 1st» ·. ! .oplerb & hn rm ^ h JUispiuck 1 »- BAD ORiQINAL 809S05 / 0830 characterized in that daeo der? ilia, which forms a material with good dielectric insulating properties, is ethyl- «ellulose. 809805/0830