EP1591250B1 - Method and means for removing a liquid from a cylinder - Google Patents

Abstract

In a process to wash a printing press drum (02) excess fluid is wiped from the rotating drum by a scraper blade (08) that has no contact with the drum outer margin. Printing ink is lifted from the drum outer margin by a secondary blade (09). The blades (08, 09) are raised and lowered by a common drive (14) and actuator (11) between contact presentation and two defined stand-by positions. Also claimed is a commensurate printing press washing assembly that incorporates a rake (03) that makes contact or not with the drum full width. Scraper blade (09) contact at the outer margin takes place at regular intervals and at different positions. The scraper blade angle of presentation is varied with respect to the drum axis of rotation.

Description

The invention relates to methods and apparatus for stripping a fluid from a roller according to the preamble of claim 1 or 6 or 10 or 11.

From the DE 38 04 204 A1 a film inking unit is known, wherein in addition to a arranged in the ink fountain zone-wise metering of the color flow for more variable control or cleaning purposes the inking unit color over an intermediate roller and over the roll width reaching doctor device can be removed. An on or off the doctor device via a pivoting means of a IColben-cylinder unit about a parallel to the intermediate roller bearing axis.

By the DE 196 24 536 A1 discloses a device for stripping paint, water and contaminants on a paint roller, wherein in one embodiment, a doctor blade and a collecting container having device for turning on and off to the roller by an air or hydraulic cylinder is pivotable about an axis. The doctor blade has at its effective edge on a cut-out portion of a width which is slightly larger than the width of a narrower web to be printed. In another embodiment, a plurality of segments of a Abstreichmessers are arranged, which are individually on or off by actuators.

The DE 1 106 772 discloses an apparatus according to the preamble of claim 10 for stripping a fluid from a roll, which on the one hand can serve as a roller cleaning device to completely free the roller of paint and on the other hand as a separator for different colors. For this purpose, single blade elements are provided axially next to each other, which are arranged independently of one another on a shaft which can be pivoted overall are. Depending on how the single doctor blade with respect to a position to the roll surface are previously set, after pivoting the shaft on the entire roll length or only on individual strips of color -. B. between two different colors - scraped off the roller.

By the US 3,108,539 A discloses a device for stripping a fluid from a roll, which has a first scraping edge and a second scraping edge offset in the circumferential direction of the roll. Depending on the direction of rotation of the cooperating roller, the position of the device is changed by releasing clamping blocks, and the device is pivoted on the shaft carrying this device.

The invention has for its object to provide methods and apparatus for stripping a fluid from a roller, which effectively fulfills several functions.

The object is achieved by the features of claim 1 or 6 or 10 or 11th solved.

The achievable with the present invention consist in particular that compact and simple means on a same roller two functions, namely a washing and adjusting the fluid flow can be done to a material width. In terms of space and effort, this is advantageously accomplished with a single device instead of a plurality of circumferentially-arranged independent devices.

In particular, a movable doctor unit is advantageous, which can be brought into two different Anstelllagen. This is preferably carried out in one piece or at least several pieces connected to one another in such a way that corresponding active edges (doctor edges) are moved together for both functionalities. Thus, in an advantageous embodiment, a common actuator and / or a common drive means can be used for both functions.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

eine schematische Darstellung der Vorrichtung zum Abstreifen mit einer ersten Ausführung eines Rakelelementes;

Fig. 2

eine Draufsicht auf einen Teil der Vorrichtung mit zu bearbeitenden Material;

Fig. 3

drei Lagen der Vorrichtung in Ruhe (I), zum Waschen (II) und zur Abnahme im Randbereich (III);

Fig. 4

eine schematische Darstellung einer Vorrichtung zum Bedrücken des mit Druckmittel beaufschlagbaren Zylinders;

Fig. 5

eine zweite Ausführung eines Rakelelementes;

Fig. 6

eine Seitenansicht gemäß Fig. 5;

Fig. 7

eine alternative Ausführung der Vorrichtung zum Abstreifen.

Show it:

Fig. 1

a schematic representation of the device for stripping with a first embodiment of a doctor element;

Fig. 2

a plan view of a part of the device with material to be processed;

Fig. 3

three layers of the device at rest (I), for washing (II) and for removal in the edge region (III);

Fig. 4

a schematic representation of a device for pressing the with Pressure medium acted upon cylinder;

Fig. 5

a second embodiment of a doctor element;

Fig. 6

a side view according to Fig. 5 ;

Fig. 7

an alternative embodiment of the device for stripping.

Fig. 1 shows a device 01 for stripping a fluid F ( Fig. 3 ) of a fluid-carrying rotary body 02, in particular a roller 02 or a cylinder 02, a material 04 (web 04 or sheet 04) loading and / or processing machine, for. B. a machine for papermaking or a printing press, in particular a rotary printing machine.

The device 01 has a squeegee element 03 (FIG. 2) which can be attached to the lateral surface of the rotational body 02 (hereinafter roll 02). Fig. 1 and 2 ), which depending on the position no contact with the lateral surface of the roller 02 (position I, rest position I), a contact on a total effective length L02 of the lateral surface of the roller 02 (layer II, washing layer II) or a contact with at least one section a1 ; a2 of the lateral surface of the roller 02 (layer III, Abnahmelage III), which is smaller than half the effective length L02 has. Under the entire effective length L02 of the lateral surface is understood here the length at which the roller 02 during operation of the machine is operationally wetted or wettable with the fluid F and corresponds to z. B. at least one width b04 _{max of} a maximum to be processed by the machine web 04 or sheet 04. As in Fig. 2 shown, in the second og case (layer II), the contact can also be made to the entire bale length.

The doctor element 03 has at least two doctor edges 06; 07, which are viewed in the circumferential direction of the roller 02 offset from each other.

Preferably, at least two partial width, ie doctor blade edges 07 extending over less than half the length L02 and at least one continuous (one-piece or segmented) doctor edge 06 of a length which corresponds to at least one width b04 _{min of} a web 04 which is to be processed minimally or actually by the machine, arranged. In situation I is none of the doctor edges 06; 07, in position II, the doctor edges are 06 and 07, and employed in position III one or more of the doctor edges 07 to the lateral surface of the roller 02. Employed or hiring here preferably means the establishment of a physical contact between the lateral surface and doctor blade edge 06; 07 and not adjusting a remaining gap, as is the case for example when adjusting a color film by means of a chamber doctor blade.

In an in Fig. 1 and 2 the squeegee edge 06 or the squeegee edges 06 are seen in the circumferential direction of the roller 02 offset from the squeegee edge 07 and arranged behind this. Ie. on a doctor blade edge 03 having the longitudinal section of the doctor element 03, this has in succession both a squeegee edge 06 and a part width doctor blade edge 07. For this purpose, in the example of the Fig. 1 and 2 the doctor element 03 a over the effective length L02 reaching, the doctor blade edge 06 having Abstreifmesser 08, z. B. squeegee 08, in particular a squeegee 08, and at least two squeegee edges 07 having partial width doctor blade 09, z. B. squeegee 09, so-called tandem doctor blade 09, which are on a common actuator 11 on the lateral surface to or away from her movable. The tandem blade 09 is preferably designed resiliently in the radial direction of the roller 02 with a spring hardness D09 and advantageously made in the region of its blade edge 07 of a softer material than that of the lateral surface. The wash squeegee 08 may be performed either rigid or resilient, with it in an advantageous embodiment with a doctor edge 06 having elastic lip 12, z. B. a rubber lip 12 is executed.

For double functionality of the squeegee element 03 - either as a means for Cleaning or washing the roller 02 or for color reduction in the edge region - may be provided each actuator 11, which allows two Anstellpositionen and a parking position, namely that in position I none of the squeegee 08; 09, in position III, only the tandem doctor blade 09 for color reduction in the edge region and in position II at least the wash blade 08 (here both the tandem and the wash blade 08, 09) is employed for washing the roller 02 or are. In the present case, the doctor element 03 is set for the position III in such a way that the tandem doctor 09 is in contact with the lateral surface while the washing doctor 08 is still spaced from the lateral surface ( Fig. 3 , Location III). For the layer II, the doctor element 03 is set further in the manner of the lateral surface until the washer blade 08 is also in contact with the lateral surface against the restoring force F09 of the resilient or spring-mounted tandem blade 09 (FIG. Fig. 3 , Location II). For this purpose, the doctor element 03 can in principle be provided by a linear movement, for example on a linear guide, or via a curved travel, for example a pivoting movement of a lever or a shaft.

The actuator 11 is based in a particularly advantageous embodiment on a pivoting movement of the squeegee 08; For this purpose, they are rotatably mounted on a pivotable substantially parallel to the axis of rotation of the roller 02 extending shaft 13 (cross member 13). The shaft 13 here represents, for example, a part of a holder or a holder 13 for the squeegee or 08; 09 or doctor element 03 itself. The pivoting of the shaft 13 and thus the placement of the doctor blade 08; 09 and the doctor element 03 can either manually or preferably by a drive means 14, z. Example, a motor or described below in an advantageous embodiment, one with fluid-operated drive means 14, z. B. a pressurizable cylinder 26 with piston 27 and plunger 28 ( Fig. 4 ), respectively. the articulation of the shaft 13 by the drive means 14 takes place for example via a rotatably connected to the shaft 13 lever arm 16. The with pressure medium acted upon cylinder 26 is preferably designed as a double-acting cylinder 26, which has on both sides of the piston 27 an oppressive pressure chamber. To equalize the contact pressure and / or to prevent distortion, a plurality of (eg, a total of two, one in the near-end region of the device 01) such actuators 11 with drive means 14 can be provided on the length of the doctor element 03, which then moves synchronously, for example and be driven.

Particularly advantageous for a remotely operable and / or automatable device is to provide an actuator 11, which in addition to a neutral position for the parking position two defined positions for the Anstelllagen II; III provides. The drive means 14 is then in signal communication with, for example, a control station of the machine or a computer-aided machine control and is operated remotely from there.

The positioning of the doctor element 03 or the squeegee 08; 09 or of this driving actuator 11 with respect to the o. G. two pitch positions II, III can in principle by two different stops, by an adjusting spindle (in the gear of the actuator 11 or as adjustable by turning stop), by a position-controlled or -gesteuert drive (angle or position controlled motor, or in particular stepper motor) , by a pressure-medium-operated position cylinder, or by a spatially variable (adjusting spindle, in the travel-engageable cam or plunger) and / or a force-dependent stop as described below.

The positioning is based in a particularly advantageous embodiment of a force-dependent stop 17, the spatial position of its stop surface 22 is dependent on a size of a force. For this purpose, the stopper 17 itself as a spring element, for. Example, a compression spring, be formed, one end of which is arranged fixed to the frame and the other end defines the position-adjustable stop surface 22. In Fig. 1 is the movable stop 17 z. B. formed by a roller 17, which over a plunger 18 is mounted on a frame-fixed bracket 19. The storage between roller 17, plunger 18 and holder 19 is designed such that the distance between the roller 17 and holder 19 is variable. Between bracket 19 and roller 17 is a spring element 21, for. B. a compression spring 21, arranged in such a way that it biases the distance between the roller 17 and holder 19 to a predetermined maximum value. The stop 17 acts as a function of the operating situation defining layer I; II; III with a rocket-resistant component, here a stop surface 23 of the lever arm 16, the device 01 together. The stop surface 22 is positioned such that upon interaction of the stop surfaces 22 and 23 in the unloaded state, the correspondingly tilted doctor element 03 assumes the position III (only squeegee 09 employed).

The to the above mentioned situations I; II; III the squeegee 08; 09 and the squeegee element 03 corresponding positions of the rocker-resistant and the position-adjustable stop surfaces 22; 23 and the operating position of the shaft 13 and the lever arm 16 pivoting drive means 14 are also the Fig. 3 refer to. In position I, the piston of the fluid-operated drive means 14 is in an end position, for. B. in retracted and possibly depressurized position, so that the doctor element 03 and the squeegee 08; 09 is turned off. The stop surfaces 22; 23 are out of contact. For the movement of the doctor element 03 or the squeegee 08; 09 in the position III (color decrease in the edge region), the drive means 14 is acted upon by a pressure P1, which is a movement with a force F1 in the direction of stop 17 and a pivoting of the doctor element 03 and the squeegee 08; 09 causes. The pressure P1 is selected such that the spring element 21 is not deformed or only slightly deformed, ie that the force F1 is smaller than a spring force F21 required for a significant deflection in the region of the spring characteristic curve which is relevant for the bias voltage. For the movement of the doctor element 03 or the squeegee 08; 09 in the situation II (washing), the drive means 14 is acted upon by a pressure P2, which movement with a force F2 in the direction of stop 17 and a further pivoting of the doctor element 03rd or the squeegee 08; 09 counter to the spring force F21 and the restoring force F07 causes until the doctor blade edge 06 cooperates with the lateral surface. An end point can be defined by an end position of the piston, an end position of the spring-loaded stop 17, a frame-fixed stop, not shown, or by the specification of the pressure P2. The pressure P2 is selected in the example such that the stop 17 is springed at least as far as the doctor edge 06 is applied, ie that the force F2 is selected to be greater than the sum of the spring force F21 in accordance with the spring-loaded state and the restoring forces F09 and if necessary F08 the squeegee 09 and, if spring-loaded, squeegee 08 at the resulting deformation.

The scraped off fluid F ( Fig. 3 ) flows in the situation III (color decrease in the edge area) only via the squeegee 09 from. In layer II (washing) the fluid F flows in the area of the squeegee 09 (subsection a1; a2) over the squeegee 09, and in the section a3 seared off only by the employed squeegee 08 via that section. The scraped off fluid F, z. As paint, water and / or dampening solution, can flow in a non-illustrated embodiment in a stationary arranged under the device 01 collecting container. In a preferred embodiment, however, the device 01 itself has a collecting container 24, which with the doctor blades 08; 09 of the doctor element 03 is connected in such a way that the fluid F via the squeegee 08; 09 flows into the collecting container 24. Since the collecting container 24 is mitverschwenkt in this way, the fluid F passes regardless of the position of the doctor element 03 safely into the collecting container 24. Advantageously, a wall of the collecting container 24 and the doctor element 03 are connected to each other over the entire length gapless.

Fig. 4 schematically shows a device for pressing the pressurizable medium pressure cylinder 26 with piston 27 and plunger 28 and illustrates the above-mentioned layers I; II; III corresponding end positions of the plunger 28 in the basis of Fig. 3 described procedures. A pressure medium source, not shown, for example, compressed air source, a level for the pressure P2 is connected to a first Input of a first multi-way valve 29 directly, and with a second input of this multi-way valve 29 via a pressure P2 at the output to P1 lowering pressure reducer 31, z. B. an adjustable pressure reducer 31, if necessary, with display connected. Depending on the operating position of the multiway valve 29, the pressure P1 or P2 from the corresponding input line is present at an output of the first multiway valve 29, while the respective other line is closed. The output of the first multiway valve 29 is guided to an input of a second multiway valve 32. Depending on the operating position of the multiway valve 32 is now the input side pressure P1; P2 at a first output of the multi-way valve 32, which is connected, for example, with the plunger 28 facing away from the pressure chamber of the cylinder 26, or at a second output of the multi-way valve 32 which is connected, for example, with the plunger 28 facing the pressure chamber of the cylinder 26. Thus, depending on the operating position of the second multiway valve 32, the plunger 28 off or retractable.

For the operating position of the layers II, the higher pressure P2 present at the first input of the multi-way valve 29 is passed to its output, while for the position III the reduced pressure P1 present at the second input of the multi-way valve 29 is applied to its output.

For the operating positions of the positions II and III, the pressure P1 or P2 present on the input side of the multi-way valve 32 is applied to its first output, while for reaching the position I this pressure P1 or P2 is applied to the second output at least temporarily.

Fig. 5 shows a second embodiment of a doctor element 03 ', which, however, stored in the variants described in the first embodiment in the device 01, driven by said actuators 11 and / or drive means 14 and operated in the manner mentioned in the layers I, II and III. Only difference to that Fig. 1 to 4 is described that the doctor element 03 'not two successive or in Circumferential direction one behind the other knife 08; 09, but that the different doctor edges 06; 07 by axially adjacent sections a1; a2; a3 different expression of the lateral surface facing edge of the doctor element 03 'are formed. This different expression of the edges in sections a1; a2; a3 can be like in Fig. 5 represented by segmenting a one-piece doctor element 03 'in which it is cut from the side facing the lateral surface (sections S1 and S2) and the resulting "tongues" of the sections a1; a2; a3 are bent differently in such a way that - as in Fig. 6 shown schematically when swiveling the doctor element 03 'first the squeegee 09' for color reduction in the edge region and only on further hiring only the doctor 08 'for washing in contact with the lateral surface occurs. For this purpose, a type doctor blade 08 '; 09 'are aligned with the foot region of the doctor element 03' while the other type is correspondingly flat bent. However, the edges of the two types can also be bent in different ways (edged).

In a variant of the second embodiment, not shown, the doctor element 03 'can also be designed in several parts in such a way that individual sections a1; a2; a3 performing segments - bent accordingly - are arranged side by side in the axial direction gapless. Per section a1; a2; a3 can also be arranged a plurality of bent in the same way or not bent sub-segments. The latter variant makes it possible in a simple manner by exchanging partial segments of different types to adapt the lengths of the sections a1; a2; a3 at widths b04; b04 _min ; b04 _max of tracks 04 done.

In the one-piece design, the doctor element 03 'can be exchanged quickly in a particularly simple manner and thereby possibly at a new width b04; b04 _min ; b04 _max of tracks 04 customizable.

In the aforementioned variants of the second embodiment are therefore two Anstellpositionen and a parking position before, namely a situation I wherein none of the squeegee 08 '; 09 ', Layer III where only the squeegee 09' for color reduction in the edge region and layer II wherein the squeegee 08 'are employed for washing the roller 02 and the squeegee 09. In the present case, the squeegee element 03 is employed for the layer III in such a way that the squeegees 09 'are in contact with the lateral surface while the squeegee 08' is still spaced from the lateral surface (comparable to FIG Fig. 3 , Location III). For the position II, the doctor element 03 is employed in such a way further to the lateral surface until the doctor 08 'is also in contact with the lateral surface against the restoring force F09' of the resilient or spring-mounted doctor 09 '(comparable to FIG Fig. 3 , Location II). For this purpose, the doctor element 03 can in principle again be provided by a linear movement, for example on a linear guide, or via a curved travel, for example a pivoting movement of a lever or a shaft.

In a preferred embodiment, the device 01 is arranged in cooperation with an axially changeable roller 02. This roller 02 is z. B. formed as a friction cylinder 02 of a color or dampening unit of a printing press and preferably has a hard, no elastic layer having lateral surface. In Fig. 2 is the chanchable roller 02 shown in broken lines in their respective end positions of the traversing movement. On each face is designated with H stroke, ie the distance between the two reversal points of the iridescent roller 02, is shown. In an advantageous embodiment of the cooperating with the iridescent roller 02 device 01, a width b09 of the above sections a1; a2 or the squeegee 09 (in particular their doctor edges 07) greater than the stroke H, z. B. greater than 1.3 times, in particular greater than 1.5 times the stroke H formed.

Also is in Fig. 2 as a development, at least one of the squeegees 09 axially movable on the squeegee element 03, but at least releasably and thus removably connected to this arranged (double arrow P).

The device 01 can, however, in advantageous embodiments i.V.m. arranged with any rolls, substantially hard surfaces having rollers 02 or cylinder 02 acting together.

For all the embodiments described, the doctor blade edge 07 'of the doctor 09 can have a profiling in its area of contact with the lateral surface in order to leave a residual quantity of the fluid F on the roller 02 for the purpose of lubricating the rollers acting together. This applies in particular to widths b09 of the above mentioned. Sections a1; a2 or the doctor 09 of greater than or equal to 50 mm, in particular greater than or equal to 60 mm.

Basically, an arrangement of offset in the circumferential direction of the roller 02 arranged doctor blade 08; 09 also on two different trusses 13 or brackets 13 conceivable, these two brackets 13 are then either moved by a common drive means 14 in a certain sequence of movements, or even independently by different drive means 14 can be actuated. In this case, it is then essential that the two doctor types (for washing or removal) are optionally or successively adjacently to one another on the same roller 02.

A hiring the Abnahmerakel 09 (position III) can in principle be manual or by the drive means 14, z. B. remotely operated and / or automated, done. In this case, it can either be triggered by a setting or an adjustment command of the printer or automatically. For the production in question, it may be permanently employed, or else preferably timed, in particular via a corresponding circuit or controller.

In an embodiment not shown, instead of the movable stop 17 a drive means 14 designed as a positioning drive is provided at the output of which at least three mutually different, in particular defined positions (corresponding to the three positions I, II and III) can be set.

This can be a linear drive in one variant, which either as an electric motor or as a fluid-operated positioning cylinder, z. B. a double-acting cylinder with position sensors or a multi-position cylinder with a plurality of series-arranged pressure medium cylinders is executed. In a second variant, this may be a stepping motor, via the steps of the three layers I, II and III can be realized.

Fig. 7 shows a development of the two aforementioned embodiments. Here, in addition to the washing blade 08; 08 'and the tandem blade 09, 09' provided a protection 33, which viewed in the direction of rotation of the roller 02 behind the contact point of the two doctor blade 08; 08 ';09; 09 'is arranged. Preferably, the rollers near the edge of the guard 33 are not in touching contact with the roll shell. The protection 33 serves as a splash guard against color, which after the doctoring off and off the doctor blade 08; 08 ';09; 09 'in the region of one of the doctor edges 06; 07, is taken up by the roller 02 when it is restarted and is thrown out by its rotation. The protection 33 is advantageously arranged on the doctor element 03 and can be pivoted together with it. The protection 33 may then be arranged such that when an employee squeegee 08; 09; 08 '; 09 'the roller near edge in the region of a connecting line V between the axis of rotation R02 and the pivot axis S is located. In the region of the connecting line V here means z. B. that when the squeegee 08; 08 ';09; 09 'the roller near edge of the protection 33 deviates at most by an angle δ about the axis of rotation R02 of +/- 10. So that the paint collected by the splash guard 33 can drain into the drip pan, the doctor element 03 Wannennah breakthroughs 34, z. B. holes 34, on. The two squeegee 08; 08 ';09; 09 'may be formed in the manner of the first or second embodiment.

LIST OF REFERENCE NUMBERS

01

Device for stripping

02

Rotary body, roller, cylinder, distribution cylinder

03

doctor element

04

Material, train, bow

05

-

06

squeegee edge

07

squeegee edge

08

Scraper blade, squeegee, wash blade

09

Scraper blade, squeegee, tandem squeegee

10

-

11

actuator

12

Lip, rubber lip

13

Shaft, crossbeam, bracket

14

drive means

15

-

16

lever arm

17

Stop, movable, roller

18

tappet

19

bracket

20

-

21

Spring element, compression spring

22

stop surface

23

stop surface

24

receptacle

25

-

26

cylinder

27

piston

28

tappet

29

Multi-way valve

30

-

31

pressure reducer

32

Multi-way valve

33

protection

34

Breakthrough, drilling

I

Location, quiet location

II

Location, washing position

III

Location, acceptance location

a1

part Of

a2

part Of

a3

part Of

b04

width

b04 _max

Width, maximum

b04 _min

Wide, minimal

b09

width

L02

Length, effective

R02

axis of rotation

F

fluid

H

stroke

P

direction

S

swivel axis

V

connecting line

P1

print

P2

print

S1

cut

S2

cut

δ

angle

'

the primed reference numerals correspond to the named components in a second embodiment

Claims (33)

1. Method for wiping a fluid (F) from a roll with an apparatus (01), the apparatus (01) optionally being moved into a washing position (II) for washing the roll (02), in which washing position (II) a first wiping edge/doctor edge (07) of a wiping blade/doctor (08) is brought into contact with the roll (02) on the entire, substantially continuous active circumferential face of the said roll (02), and into a removal position (III) for ink removal in an edge region of the roll (02), in which removal position (III) the continuous wiping blade/doctor (08) is moved out of contact but a second wiping edge/doctor edge (06) of at least one wiping blade/doctor (09) of merely partial width is brought into contact with the circumferential face of the roll (02), characterized in that the optional movement into the positions (I; II; III) takes place by means of a common actuating drive (11) which has a drive means (14), by the actuating drive (11) being moved by the drive means (14) optionally into a thrown-off position or one of two different defined thrown-on positions, the actuating drive (11) which has the drive means (14) providing positioning of two different defined thrown-on positions and one thrown-off position, and the actuation taking place by common pivoting of the first and second wiping edges/doctor edges (06; 07) which are arranged on the apparatus (01) offset with respect to one another as viewed in the circumferential direction of the roll (02).
2. Method according to Claim 1, characterized in that a doctor element (03) of the apparatus (01) is actuated for the optional washing or wiping, which doctor element (03), depending on the desired position (I; II; III), has no contact with the circumferential face of the roll (02), has contact on an entire active length (L02) of the circumferential face of the roll (02), or has contact with at least one part section (a1; a2) of the circumferential face of the roll (02), which part section (a1; a2) is smaller than half the active length (L02).
3. Method according to Claim 1, characterized in that the wiping blade/doctor (09) is thrown on in the wiping position (III) in a temporally synchronized manner.
4. Method according to Claim 1, characterized in that the actuation takes place against a stop (17) with a variable location.
5. Method according to Claim 1, characterized in that the actuation takes place against a stop (17), the spatial position of the stop face (22) of which is dependent on a magnitude of a force loading.
6. Method for wiping a fluid (F) from a roll with an apparatus (01), a doctor element (03) of the apparatus (01) being actuated for the optional washing or wiping, which doctor element (03), depending on the desired position (I; II; III), has no contact with the circumferential face of the roll (02), has contact on an entire active length (L02) of the circumferential face of the roll (02) in a washing position (II), or has contact with at least one part section (a1; a2) of the circumferential face of the roll (02) in a removal position (III), which part section (a1; a2) is smaller than half the active length (L02), the apparatus (01) optionally being moved

   - into the washing position (II) for washing the roll (02), in which washing position (II) first and second wiping edges/doctor edges (06'; 07') of first and second wiping blades/doctors (08'; 09') are brought into contact with the roll (02) on the entire, substantially continuous active circumferential face of the said roll (02), and

   - into the removal position (III) for ink removal in an edge region of the roll (02), in which removal position (III) second wiping edges/doctor edges (06') of two second wiping blades/doctors (09) of merely partial width are brought into contact with the circumferential face of the roll (02), and the first and second wiping edges/doctor edges (06; 07) being formed by sections (a1; a2; a3) which lie axially next to one another of different shape of that edge of the doctor element (03) which faces the circumferential face of the roll (02), the optional movement into the positions (I; II; III) taking place by means of a common actuating drive (11) which has a drive means (14), by the actuating drive (11) being moved by the drive means (14) optionally into a thrown-off position or one of two different defined thrown-on positions, the actuating drive (11) which has the drive means (14) providing positioning of two different defined thrown-on positions and one thrown-off position, and the doctor element (03) being thrown on for the removal position (III) in such a way that the second wiping blades/doctors (09') of partial width are in contact with the circumferential face whereas the first wiping blade/doctor (08') is still spaced apart from the circumferential face, and the doctor element (03) being thrown on further towards the circumferential face for the washing position (II) until the first wiping blade/doctor (08') is likewise in contact with the circumferential face counter to the restoring force (F09) of the resilient or resiliently mounted second wiping blade/doctor (09').
7. Method according to Claim 1, characterized in that the actuation takes place by means of a drive means (14) which is operated by pressure medium, by the drive means (14) being loaded with a first pressure (P1) for the wiping position (III) and with a second pressure (P2) which is different from the first pressure (P1) for the washing position (II).
8. Method according to Claim 7, characterized in that loading with a higher pressure (P1) than for the wiping position (III) takes place for the washing position (II).
9. Method according to Claim 7, characterized in that the actuation of the apparatus (01) takes place against a movable stop (17).
10. Apparatus for wiping a fluid (F) from a roll (02) with at least one wiping edge/doctor edge (07) of partial width which, in a removal position (III), can be brought into contact on a part section (a1; a2) of the roll (02) with the circumferential face of the said roll (02), it being possible for the apparatus (01) to be moved into a second washing position (II) which is different from the removal position (III) mentioned first and in which, in addition to or instead of the at least one first wiping edge/doctor edge (07), a second wiping edge/doctor edge (06) which is different from the said first wiping edge/doctor edge (07) can be brought into contact with the roll (02), and the wiping edges (06; 07) in each case being constituent parts of wiping blades/doctors (08; 09), characterized in that a common actuating drive (11) with a drive means (14) is provided for positioning with regard to the two thrown-on positions (II, III), and in that the actuating drive (11) which has the drive means (14) provides positioning of two different defined thrown-on positions and one thrown-off position, and in that the first and second wiping edges/doctor edges (06; 07) are arranged offset with respect to one another as viewed in the circumferential direction of the roll (02), and the second wiping edge/doctor edge can be brought into contact on an entire active length (L02) of the circumferential face of the roll (02).
11. Apparatus for wiping a fluid (F) from a roll (02) with at least one first wiping edge/doctor edge (07) of partial width, the apparatus (01) additionally having a second wiping edge/doctor edge (06) which is different from the first wiping edge/doctor edge (07), the apparatus (01) having at least two first wiping edges/doctor edges (07) of partial width and one second wiping edge/doctor edge (06) which is adjacent between them without a gap as viewed in the axial direction of the roll (02), characterized in that a common actuating drive (11) with a drive means (14) is provided for positioning with regard to the two thrown-on positions (II, III), and in that the actuating drive (11) which has the drive means (14) provides positioning of two different defined thrown-on positions and one thrown-off position, in that first and second wiping edges/doctor edges (06; 07) are formed by sections (a1; a2; a3) which lie axially next to one another of different shape of that edge of the doctor element (03) which faces the circumferential face of the roll (02), in such a way that, at the start of pivoting of the doctor element (03), first of all the first wiping edges/doctor edges (07') come into contact for ink removal in the edge region, and the second wiping edge/doctor edge comes into contact with the circumferential face for washing only during further throwing on.
12. Apparatus according to Claim 10 or 11, characterized in that the wiping edges (06; 07) are mounted on one and the same holder (13) fixedly in terms of rotation with respect to the latter and can be actuated by a common drive means (14).
13. Apparatus according to Claim 10, characterized in that the apparatus has both a doctor edge (06) which reaches over the entire active length (L02) of the circumferential face of the roll (02) and a doctor edge (07) of partial width behind one another at least on a longitudinal section in the circumferential direction of the roll (02).
14. Apparatus according to Claim 11, characterized in that the second doctor edge (06) and the first doctor edges (07) are arranged such that they are offset axially next to one another.
15. Apparatus according to Claim 11 or 13, characterized in that, in the washing position (II), both the at least one wiping edge (07) of partial width and the wiping edge (06) which reaches over the entire active length (L02) are set against the roll (02).
16. Apparatus according to Claim 14, characterized in that, in the washing position (II), the at least two wiping edges (07) of partial width and the wiping edge (06) which lies between them are set against the roll (02).
17. Apparatus according to Claim 12, characterized in that the wiping edges (06; 07) are mounted as constituent parts of doctors (08; 09) on a holder (13) which can be pivoted about a pivot pin (S) which is fixed to the frame.
18. Apparatus according to Claim 17, characterized in that, with regard to the two thrown-on positions (I; II; III), a stop (17) is provided with a stop face (22) of variable location, which stop face (22) serves as an abutment for a stop face (23) which is fixed to the doctor.
19. Apparatus according to Claim 18, characterized in that a spatial position of the stop face (22) is dependent on a magnitude of a force loading by the drive means (14).
20. Apparatus according to Claim 19, characterized in that the stop face (22) is mounted resiliently by means of a spring element (21) on a holder (19) which is fixed to the frame, counter to the movement direction of the associated stop face (23).
21. Apparatus according to Claim 20, characterized in that, in the rest position, the spring element (21) is prestressed counter to the movement direction of the stop face (23).
22. Apparatus according to Claim 19, characterized in that the stop face (22) of variable location has at least one first position which corresponds to the removal position (III) of the apparatus (01) and one second position which corresponds to the washing position (II) of the apparatus (01).
23. Apparatus according to Claims 21 and 22, characterized in that, in the prestressed rest position, the spring element is situated in the position which corresponds to the removal position (III) of the apparatus (01) and, in a compressed position, the spring element is situated in a position which corresponds to the washing position (II) of the apparatus (01).
24. Apparatus according to Claim 10 or 11, characterized in that, for the actuating drive (11), a stop (17) is provided with a stop face (22) of variable location, which stop face (22) serves as an abutment for a stop face (23) which is fixed to a doctor.
25. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is configured as a drive means (14) which is operated by pressure medium.
26. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is configured as a remote-controllable positioning drive, at the outlet of which at least three defined positions which are different from one another can be set.
27. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is configured as a positioning cylinder which is operated by pressure medium.
28. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is configured as a linear drive.
29. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is configured as an electric motor, in particular as a stepping motor.
30. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is signal-connected to a control desk and/or a machine controller.
31. Method according to Claim 1 or 6 or apparatus according to Claim 10 or 11, characterized in that the drive means (14) is of remote-controllable configuration.
32. Apparatus according to Claim 10 or 11, characterized in that a splash guard (33) is provided in addition to the wiping edges (06; 07).
33. Apparatus according to Claim 32, characterized in that the splash guard (33) is arranged behind the wiping edges (06; 07) as viewed in the rotational direction of the roll (02).

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