DE7116098U - COPY DEVICE - Google Patents

Description

4 1 * 4 Λ * Λ *

* t € 44 * t * Φ *

Hansmann · Herrmann 8 MONKS 2 · ΤΙι · ΓΜΐ · η · ν. »

April 26, 1971

ADDRESSOGRAPH-MÜLTIGRAPH CORPORATION

1. Business address j 2, business address:

Cleveland, Ohio 44117 Mt. Prospect, Illinois 6ΟΟ56 Babbitt Road 1200 West Central Road 1800 V. St. A. v. St. A.

Copier

The innovation concerns a copier for developing copy material aüi diazo base - and in particular a device from the preceding "described way through which a liquid 5ntwicldermi-utel is applied in measured amounts to an exposed, sensitized copier material based on diazo to to make dry developed copies.

The process for developing sensitized copy material Diazo-based application of relatively small, measured amounts of a liquid developer is disclosed in the US patent 3 446 620 of the applicant described and explained.

Apparatus for the above-mentioned process is disclosed in U.S. Patent Applications Serial Kos. 831 685 and 831 399 _T at the same time belonging to the applicant, described-

In the last-mentioned applications, a developer device is explained, which old one of the applicator rollers works, the applicator roller is equipped with a uniformly prepared surface, which to accommodate a "limited amount of developer media serves- Against the surface of the applicator roller and parallel to the axis of rotation of the same, a mechanical one is placed Wiper body on * v / elcher to remove excess developer medium from the surface of the applicator roller is suitable. One second, pressure-bearing roller is in drive connection with the applicator roller in order to have a developer area between them to build. Copy material is fed between the rollers and is developed when the fluid and the pressure with it With the help of the pressure roller is applied.

Bi e devices of the aforementioned patent applications work satisfactory, uia fully developed, to touch make dry copies using minimal amounts of developer fluid. However, if very wide copy material based on bias (i.e. in the range of 100 cm and more) is developed, the application member and the pressure rollers must be of the same length or size as the width of the material.

It has been shown in practice that pressure rollers for devices the length dimensions described above about 0.45 kp Weigh per 2.5 approx length. A roller 100 cm or more in length would weigh 18 kg or more. The great weight a roller body of this type leads to construction problems, as a reinforced bracket or storage for the Rolling is required. As a result, there are higher costs for the paörikatioB of 5a twi disgusting people of this type.

Except for the latter, which can be traced back to the length of the rollers Difficulties arise from having problems

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Irregularities in the surfaces of the rollers and by uneven pressures along the length of the rollers and / or curvature parts of the rollers, which during manufacture or during use develop; Surface irregularities and bends in the rollers can result in non-uniform application of the developer medium on the copy material, if this is passed through the developer area. As a result, unusable, unevenly developed * copies are produced.

On this basis, the object of the present innovation to provide a Entwicklergorät of the type mentioned for 2a £ - wrap so au improve copy material on Diasobasis that the disadvantages described can be vannioden. The device according to the innovation should in particular be suitable for developing relatively wide, diazo-based sensitive copy material and be able to be operated economically by exerting a uniform pressure on the copy material and applying a predetermined amount of a liquid developer medium.

An embodiment of the developer device according to the present The new rank has a support roller; on which one is suitable to carry a limited amount of developer agent; the The roller is rotatably mounted. Near the outer surface of the AuSragwal- ze extends along the length of the same in a parallel position a pressure exerting blade body which is tangential on the Waizvsnflache. The area between the Blade body and the roller surface represents the developer area for the copy material. A second, for dimensioning the The blade body serving as the developer medium also rests tangentially on the outer surface of the applicator roller. The second Blade body is on the anxfT & idler roller by 180 with respect to of the first blade body arranged offset to the

- Balance 4 forces acting on the roller.

A body carrying the developer medium, its length & er length of the roller, is in the area between ^ n the Klingerifcorper applying the developer medium uiid the Ai delivery roller »Several holes" or bores are in this body; The Sfeicklermediiiin can be extracted from these holes be pumped onto the blade body used for dimensioning. The developing medium is carried by the blade body over the . Outer surface of the roller spreads, while excess medium is scraped off the surface of the roller by the blade body used for dimensioning and into a trough below the applicator roller arrives.

To ensure the uniform distribution of developer media over the To ensure roller surface and to prevent drops of the developer from settling in between the surface of the applicator roller and the form a pressure exerting blade body, provision is made that the Pressure-exerting blade bodies brought into contact with the Walsen area after the wiper blade has been placed against the roller surface at a certain time. The temporal one Distance is sufficient to ensure a uniform surface; of the Snt— Apply the rolling medium to the roller surface. This is done automatically with the help of a new type of electrical Circuit and a control joint, which is excited by the main switch of the developer device. In the same way When the device is switched off, the blade bodies are lifted off the roller surface in a chronological sequence. Taking off the blades from the surface of the applicator roll when the developer is not in use prevents scratching the roller surfaces through the blade body, whereby the quality of subsequent copies could be impaired.

J532SxühriZ! 3gsoexample of the present firing system is tinted

explained in the drawings "

! Figure 1 aer ZeicJhnaBgejri isi: a Sirauz sees one on Diazoba— |

sis working copier with the Sotwicklerge— |

advises 3i according to the present fire;

2 is a Seitenscainiirtansiciic of the Kopierniascliine ge-3äB Figure 1;

Ir is 3; an enlarged side to the ic iit of the drive for |

äen bull's body, eircn seinÄea ois Sas Ifet ^ icklermeärus! I.

oesessenuchten 1211a äen Sruck exerting blade body of the |

nominal tickler device to the applicator roller]

put on or taken off iron this ȣ er cut; runs along line 3-3 in Figure 1) vmd

JFlgur 4 is a s <5aeaatlsc32e s JDia grasia the electrical scarf _:

tTtng 2I3T actuation of the eat wrapping device after the previous j lying Uetienmg. ί

In Figures 1 and 2 of the drawings is a diazo copier
10 with an Eatwiciiliaiigsgerät according to the present
shown-

The bio machine has a housing 14 and a front wall
16, ax of a rear wall 18, sxt upper and lower
Walls 20, 22 and ait side edges 24, 26, which the above
Connect ren, lower, anterior νεηά rear iiands.

3 in tintercr section 28 of the housing is shown in FIG
Drawings from an old packaging device . 30 equipped for copy sheets; Bit Help © of the preparation device 30
becomes a diazo-based sensitive copy sheet
A selection: released, vs if this sheet is in

a Slaehen- to-Siaeiienkontakt with an original "state. In this way, the ißrd EopiefiifeLat ^ isit 5ilf e of the original exposed,

The Belieninmgseiij ^ iclittiBg for copy sheets according to Pigur 2 dear drawings is provided 2Ut a rotatable lamp 32, on the outer surface 34 of a Sojdenblatt and an original drawing (not shown) in Sa.nawi.eh.— way to expose the Sopienblatt. An endless belt 36 extends around the outer surface of the lamp 32 and is movable along the rollers 38, 40 and 42 can be used »

Uie Qriginaizeicnnsng ~ ozw. the Qriginalolatt and in Sandwicn-way intended "Sopienblatt be located zwisciien over the support 45 in an i gave 46 near the hell 42 Sadlos- the" band 36 of the land 34 of the AtiSeHflächc laape 32 introduced. The original and the copy sheet are carried by the lamp 32 and exit near the ball 38 via an output. At this point the copy sheet is exposed. It is now separated from the original sheet and is ready for a sheet winding.

In the upper section 50 of the housing 14 the Ebpicraasciaine is located a preferably illustrated 2htwicklungseinrichtung 12 according to the present opinion "

The developing device is provided with an application roller 52, the middle wall of which 54 is made of metal, while the outer, circumferential covering 56 is made of a smooth, non-porous and elastic material, such as rubber. The outer surface 58 of the covering 56 located on the fang is in a special way: ^ zuboreitöt, vm as

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To serve as a support surface for a sports medium; As a support surface, it has irregular indentations, varying in depth and size. A detailed description of the support surface is given below .

The roller 52 is rotatably supported at its ends 60 and 62 of the shaft part 54 between vertically extending "walls 54 imfi 66 in bearings 68" and 70 (jPigar 1) attached to the walls. An extension body 72 is at one end 62 of FIG Shaft 54. A drive motor 76 drives the Aaftragv / roller 52 on a shaft 78 which -from the gear 79 of the drive motor 76 extends xmd a Zettenzalinrad 80 across the board. A iSndloskette 75 is placed on the zxnror said Kettenzahnrääern and serves to transmit drive of the intriebsmotors 76 to the application roller 52, in order to enable these tfedrsiim ^.

You chain? 5 is also about gear wheels 82 and 84 for whichever one on vTell ^ n 83 and 85 are arranged; these waves extend away from the wall 66. The last-mentioned chain gears create a path over which the Snäloskcttc 7> to drive the application roller 52.

On the opposite sides of the applicator roller 52 is in? A pair of blade bodies 86 and 88 are provided at a distance of 180 ° from one another. Each of the blade bodies 86 and 88 is attached to a corresponding rotatable holder, which has the shape of a hollow shaft 90 and 92 and is attached to the hollow wedge © Has blade holding body 94 and 96. The blades are each made of a flat component made of steel or a similar material. I) Ie ΙΓίίη-gen are on their corresponding Küngenhalterkörpara EPt Help ο from BsfentigpiiSseleinGnton, so with the help of bolts 98

Hie Eohlwellen 90 and 92 which also between the 64 and 66 * can rotate in the direction of the arrows shown in FIG and 88 in. in contact with the outer surface 58 of the applicator roll 52 as shown by dashed lines in Pigar 2 of the drawings. As shown, the Elingen body bent when it is in contact with the roller surface before, which enables tangential contact.

An E-ear 100 is attached to an L-shaped bracket 102 ", which is attached to the blade holder body 94? with the help of Tube 100 becomes a developer on outer surface 58 applied to the applicator roller 52. Bine flexible cable IO4 is connected to one end 106 of the tube 100 and is connected to a container 109 of the developer 110 via a Pmnpe IO8 Connection - Medium pumped through oil pipe 104 escapes the pipe IOO through openings located in the Abs tesi 3 za-jinander " 103 (Figure 2).

The underwinder medium distributed from the tube 100 pours out υ tzvi. disperses on surface 112 of Figure 8b and comes into contact with the outer surface of rotating applicator roller 52; the developer is applied in this way in "measured proportions on the outer surface 58 -

With the help of the blade body 86, together with the special Prepared outer surface 58 having applicator roller 52 applied a controllable Mungo of the developer medium to the copy sheet to be developed. The blade body 86 strokes Excess developer medium from, which is returned to a trough 114. The trough is below the for this purpose Application roller and the blades used for dimensioning are provided. Excess developer medium is discharged through an opening 116

in the trough 114 (Figure 2) and discharged through a large peat filter 111 into the container so that it can be reused. The grid-toroige filter 111 is used to remove the smallest paper particles, which during! the development can accumulate in the developer and which, without filtering, could get stuck underneath the body. In this way, lines were left on the surface of the subsequently developed copy sheets. The filter 111 is ruined periodically, including removing the Ba- ( pier particles from the filter.

As already mentioned, the outer surface 58 of the support roller 52 prepared in a special way to carry a predetermined amount of the developer liquid necessary for developing of copy sheets sensitized in the diazo process is used.

The structure or the finish of the application roller 52 is for proper functioning of the developer device is essential. The amount of the 5S on the outer surface the applicator roller held developer medium, which the

C copy sheets are fed depends on the particular surface properties of the platen. It turned out that areas of varying depth and size of the recesses are best suited to the appropriate fluid menije to wear or take up so that when touched dry copy sheets can be developed. The recesses of different depth and size have a certain one Average center line smoothness expressed in millionths of an inch in depth. An applicator roller, the surface of which has an average centerline smoothness in the range of 10 to 200 X millionths of an inch has sufficient and satisfactory smoothness jjp.ch of the present innovation. The limits of application of the developer medium with

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With the help of a suitably prepared Äüftragwäla © lie between 0.5 grams and 3.0 grams per square meter of copy material

A detailed »going © description of the roller surface and their preparation is described in US patent applications Serial No. A31 6§5 * 2nö Sorial Ho ,, 831 399 of the applicant included «

The second blade body 88, when in contact with the outer surface 58 of the roller, exerts a pressure thereon along a line of contact which corresponds to the pressure exerted by the blade body 86. The blade body 86 is tm but offset by 18O degrees, "he ^ aize 52 is provided. The contact surface forms a development area 118, shown in FIG. 2, through which the copy sheets to be developed run.

It is essential that those on the roll face angolegbn forces are equal to each other. If not the Pail, there is a tendency for the roller to shift or dislocate; at the same time the surface of the roller becomes deformed. In both of the above-mentioned cases, in each case the quality of the development facility made copies.

A copy sheet, which at input 120 in the developing device is inserted manually along the curved guide body attached to the attachment 119 in section 50 of the housing (FIG. 2) in the development area II8 introduced. This is where the leading edge becomes cbs paper is gripped between the pressure-exerting blade body Gr 88 and the applicator roller 52. By Rotational movement of the applicator roller 52 in the direction of the arrow shown causes the copy sheet to pass through the development area II8 transported, with developer medium under pressure is applied to the exposed copy sheet. The

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Wrapped copy sheet faces at the output © 124 in one Touch dry state from the development device out again.

As already mentioned, the blade bodies 86 and 88 are on Xlingen holding bodies 90 and 92 attached; these can be rotated around the blade bodies on the outer surface 58 of the applicator roller 52 to apply or to detach from the outer surface ..

The movement of the blade body is controlled by a steering joint and controlled by an electrical contact system 126, which shown in detail in Figures 3 and 4 of the drawings

The aforementioned contact system 126 has a control joint body which preferably has the design of the cam or control body 128 ". The control body is essentially circular in shape -and is rotatable at its center 130 on the wall 132 of an electrically operated Motor 134 (Figure 1) stored. Boron motor can move forward (Intervention) and backwards (release) ait EiIfs von. Bingrtff- and award windings, as detailed below is set out.

Zv / ei sets of electrical contact units 136 and 13 ^ j, e two pairs of SLattfcdcrkontalrtea 136a, 136b and 138a, 138b on. The contacts will be rolled out with the help of sturgeon runners 14O, 142 actuated, which on the stacked contacts are arranged by means of additional leaf springs 143 and 145. Each of the balls of the control runner runs on the outer surface or outer edge 147 of the control body 128. Lead wires are according to Figure 3 of the drawings to the connections of the corresponding Contacts ajigeschlossesi. The existing connections at contacts 136a, 136b and 138a. 138b will be

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below with an explanation of the circuit diagram shown in FIG described.

The S-fcouor body is constructed in such a way that it has three outer bars TI, T2 and T3 has * The orbits sina under vorsehiedoncn Radial abs tänd cn, measured from the center of the body: provided. The rollers 140 and 142 run along these paths the steering wheel. When the control body 128 has been rotated; the contacts of the units 136 and 138 are opened or closed to switch the motor 134 on or off.

A pair of Annen 144, 146 is used to dos the rotary movement Control body 3 128 in a drive for moving the blade body 86 and 88 to be implemented. The arms 144 and 146 are each at a first end 149, 151 kit by means of fastening elements 148, 150 (Figures 1 and 3) hinged to a respective end 152, 154 (Figure 1) of the rotatable, hollow shafts 90, 92. The opposite ends 156, 158 of the Arne 144 and 146 are with the help of a control wheel or a roller 160, 162 guided on the control body 128. The rollers 160 and 162 run in guides or tracks that have been cut out accordingly 164, 166, which are located in the control body 128 according to FIG Drawings are located. Each of lanes 164 and 166 v / ix-d through a passive track area Pi,? 2 and by an active one Track area Al, A2 formed. The movement of rollers 160 and 162 along the passive areas of tracks 164 and 166 does not initiate movement of the corresponding blade bodies. The authorization in the active areas of tracks 164 and 166 causes the blades to either abut outer surface 58 reach the applicator roller or be detached from the outer surface. This depends on the direction of rotation (clockwise or counterclockwise) of the control body 128. The manner of operation of the control body 128 and its control runner is as follows explained.

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-Lin Figure 4 of the drawing is a preferably shown " Äizsführungfors 170 contain the circuit through which the Movement of the blade bodies]? 86 imä 88 la annex to the order roller 52 12nd iron the orphan abisaadi; is controlled.

The circuit 170 is connected to terminals 172 and 174 by a |

HerköüSüllelie 115 volts: AC voltage xKJgsqiielle (not shown) j

fed in; Ports 172 and 174 are connected to lines J.

176 and 178 connected. Line 176 has a first &

Switching contact ISO des sanuoll. "bcrtliiigöS ^ es Ab — Jkss ^ Sehalters M

182 connected. Older switch contact I8O normally stents with * g

a first contact I84 in connection, which in turn is connected to I

a lead wire I80 is connected - this is connected to the |

normally open contacts 13? a of a pair of ULattfe- |

of contacts connected. I.

Sin zv / eiter contact I88 of the ssmuöll "bciatigi ^ ren iin-off switch 180 is used for the V * jrl? Iiiih222g nit d <sa Sciialtlcontakt I8O. Movement of the switch contact 180 2nna Zontak 188 leads to the feeding of current'oei · Icitüisg 183 * tta to drive the JPiiapentaotor ICB, whereby sSafraiekΙχα & βτ & ίälvsn is pumped into the Hohr 100 (Figure 1) and the movement of the self-propelled bodies 86 and 88 is started. The Purapenaotor 1v8 is over the line 178 as a return to the power source before 'avjiamn. 2ic movement of the switching shaft or switching contact ISO and the contact ISS also serve to feed power and thus switch on the motor 76 by which the application roller 52 is set in motion.

The contacts 138a, which on-off of switch it is connected 182 via line 186 can be actuated to "inen rsanuoll" are transmitted over the line 192 ax the Fröigö ^ espttlö 199 of Kotor 134 in connection. Piping is in turn ίχύϋΤ the "serving as Hückfü3irttnge Lines 194 taid 196 to äiö cliskirischö Spa

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711609830 p. 71 I.

source connected.

Contacts 138a are also six hem. Second safety contact I98 of the manually operable on-off switch 182 irerhuiiäes. Sehaltkontakt 198 "is normally in the open position" with respect to contact 200. The latter contact is via line 202 and via contact pair 136 as well as via line 2C4 sows the normally closed sets of contacts 2ö5 e? ^ es B-second time delay relay 2CQ of switch 182 connected.

The normally open contacts 210 of the relay 2QS are filled via line 212, normally closed Zbntakte 133l> the line 214 back to the MotoreisgxJLffsspule 216. The latter coil is on the lines 19δ? 178 ^ b connected to power source.

Normally closed contacts 133b are never connected via line 218 and via normally closed contacts 136a of the contact pair 136 and lines 220 from 204 to the normally closed contacts 2 * ^ 6 of the Zei-fcvisrzögeruiigs-

rolais 208 in connection.

In order to understand the device according to the present invention, the operation of the dx & elzian parts is explained below.

Referring to Figure 4 of the drawings, circuit 17C is normal, not switched on dead state. If the jeep / icklergerät to be operated according to the present invention, wlrci the manually operated on / off switch 182 bridged down, so that the switch contact 18C voö Koniakt 184 zttcs Xörrtakt 188

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ίί is moved. It opens the connection with the axdf in this way

|! line 186 un " ¹ - closes the" Sebs lining to the drive motor 76

ji of the pump 108 and sine further circuit via line 209 and

the normally closed contacts 206 of the Z-e ± tversö— relay 208.

At this point in time, the application spine 52 is safe, while the developer medium <roi2. Container "11C additionally Hoirr ICC j gepuapt to an.ä Hing on the body 86 ~. Übeir the Häclie the up carrier roll to be distributed.

The 33 current is conducted via the normally closed contacts of the time delay relay 2C8, via line 204 to the line 22G and the normally closed contacts 136a and lines 218 and 214 to the motor control coil 216 in order to control the control body 128 in the direction of arrow 224 as shown in the figure 3 of the drawings in Ifea rotation. JSzv control body v / iid etv / a 4 ^ ° counter-clockwise, even in Pigur 3, turned so that it is in an oil position. When the cam or control body is three times the Rolls 14C and 142 along its outer edge 147 *

The roller 14C remains on the cream T1 for a certain time and then moves to the path T2, whereupon the contact 136a is opened. The opening of the switch 136a (FIG the Bolle is] 4Q on the track T2 142 moves from the track T3 to the track T2, and causes the contacts 138a - is suppressed at this time, the switching contacts 136a UNCF 136l> both _s because the roll in an open LSGS.. closed. At this point in time, contacts 138a and 138b are in the closed state-

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During the rotation of the S control element 128 122 4-i? The rollers ISO and 162 sieicMTalis were shifted along the corresponding cutouts 164 and I66 lsi star bodies 128. The roller 16C has moved along the passive part JP1 of the carcass 164 ″, while it has moved the roller 162 along the active part A2 of the cutout 166 ″. In this way, the blade body 86 (length 1) used for dimensioning the SairsicäerHieäliii3S is braced in contact with the oil surface of the carrier roller.

Wait during the three-second time delay Time delay relay 208 is developing sediuis, which is made up of exits the openings 103 of the tube IOC, in "proportioned" proportions Distributed over the outer surface 58 of the applicator roller 52. After the three-second time delay has elapsed, the switching contact 207 of the Seiais tob moves normally closed contact 2C6 to normally open contact 210, The current from the 115 "volt AC source is now via the closed contacts 138d to the motor input coil 216 directed to the control body 128 in the direction of arrow 224 counterclockwise (Figure 3) in ündroi-iuug offset.

The cam or plug body 128 now rotates by a further 80 ° from such an intermediate position. During the 8C ^a rotation movement, the roller 14-2 moves from the track or track T2 to track T1, where applicable the switch contact 138b are opened.

The opening of the contacts 138b breaks the "connection of." the power source to the engine intervention pulo 216 ,. why the engine 134 switched off and the rotary movement of the Stouerkkörpers 128 ended v / ird.

During the last-mentioned DrehbewGgung of StGuorkörpers 128 van 80 ° to dio blind 142 is moved by the passive part

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P2 of the cutout 166, so that koine further Bowsguisg ctes blade body 86 is triggered. The hollow 160, however, was bowogted by the active part A1 of the cutout 164, with the result that the spherical body 88 applying a pressure is pressed into contact with the outer surface of the applicator roller 52.

If both blade bodies are in contact with the threatening support roller, the development level is; in the operational position and diazo copies can be passed through the development section $ 0 of the copying machine 10 (FIG. 2) for processing.

When the development process is completed, the device is in returned to its normal, switched-off position when the manually operated on-off switch moved 182 to its off-Xago will. The switching contact 18C of the switch is released from its engagement with the contact 188 and is in contact with it brought contact 184. The switching contact 198 is made from hisi-system at contact 2CO "moved.

There is now a connection from the 115 VoIt changeover source to the motor discharge or Preigabaspule 190. The connection is from the power source via lines 176, 186, via contacts 138a and conductor line 192. Contacts 138a remain because of the position of Holle 142 on track TI in a closed position. When the motor-disengagement coil is energized 19C, we: l of the motor 134 (Figure 1) operated in reverse by the control body in _{Dhrzeigarsinn}} the direction shown by arrow 224 ien sighting to enable ÜmclrGhung. The control body is rotated a full 12Γ back to the starting or normal position.

During the latter turning movement, the blades - body 86 and 88 in the sequence from their layout from the

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support roller released; first of all, a Klij ^ OBbodyex 8β solved, after which the Elingorikörpor 86 is lifted off. These The release movement is achieved by the movement of the knobs 160 and 162 on the active ur. <?> passive parts of the corresponding cutouts, the movement being opposite The above-mentioned movement for the company is taking place.

When they are returned to their starting position, they will be contacts 138a open to stop motor 134; the Pump motor T08 is switched off.

While the device preferably shown for moving the blade body 86 and 88 in contact with the applicator roller 52 and from this, dss control body and from of the circuit explained above, it is obvious that the intended following movement is also carried out by other devices can be brought about, for example by a series of gears which control the movement of the Control blade body. The drive mechanism for the gears is triggered by a side delay system. Facilities of this type can therefore be used in the same way for the device according to the innovation.

It was explained that a decoder according to the present invention uses bit; a "device is provided to move blade bodies 86 and 88 in a time sequence in contact with the contractor orphan and away from it. This subsequent movement is essential because it ensures uniform wetting of the application roller before the open pressure-exerting individual bodies in contact with it the roller be brought. 3s can be brought about by a faster start-up. at the same time that the blade body is pressed against a still relatively dry roll, which fo adverse effects hr en could be avoided.

7111698.1 M 71

Claims (1)

—Τη - 19 - § Claims 1.! Copier for developing sensihilized sheet material, to which a certain amount of a liquid developer is applied, using an application roller, which can be rotated in a predetermined direction under currency in Jüagern and whose surface saws <3Le predetermined amount of liquid Satwieklers, and with a gate straightening device for applying liquid grain to the roller surface, characterized in that a first sheet body (88) extends along the false surface and rests against the roller surface (58) under pressure to develop sheet material * and a development area is formed along the career return line * through which you see the sheet material to be developed "moves" that a second body (36) "extends in the same way as the first blade body" is arranged and that the false is arranged under pressure on the falselfcche jL, and that the second blade body is under reference ? The direction of rotation of the fold is arranged on the first sheet body in order to control the amount of liquid developer which tone of the fold surface is to be applied to the development area. 2. Copier according to claim 1, characterized in that the sheet body (86, 83) with respect to the Walae (52) aligned are that they are the "concerning their bearings balance acting forces. 3. Copier according to Änspnach 1, characterized in that the blade bodies are arranged offset to one another on the circumference of the roller 180 °. 4 ·. Copier according to Claim 1, characterized in that the device for applying liquid developer - 20 - the roller has a sprayer (i00), which the Eatwieklermedium applies to the roller, also a the liquid developer storing folder (i0g \ which connected to the sprayer and to a pump (1O8) which connects the container to the sprayer, so that the liquid developer on the roller surface is applied. 5. Copier according to claim 4-, characterized in that the sprayer consists of a hollow, apertured tube (100) ₄ which runs along the orphan (52 ^ extends and near the second Wiseherfelattkerpers (βδ) is arranged * in order to distribute the liquid developer uniformly titer the valley surface. 6 * copier according to claim 1, characterized in »that The first and "guide" bodies consist of flat, elastic and elongated Metairbleeh bodies, which are soft assume a curved iorm under pressure and tangential rest on the roller surface * 7. Copier according to claim 1, characterized in that -λ a Bückführung it ung for the developer medium to Container 'consists in order to return the developer medium flowing from the roller a "via a filter , whereby foreign particles & particles are discharged from the developer medium" before they reach the second sheet body. 711809830.9.71