EP3294555B1 - Printing unit, and method for operating a squeegee device in a printing unit - Google Patents

Description

The invention relates to a printing unit and a method for operating a doctor device in a printing unit according to claim 1 or 21.

The WO 2007/119167 A2 discloses a machine for multi-stage processing and / or processing of sheet-shaped substrates with a screen and a squeegee comprehensive screen printing and multiple upstream offset printing units. In a first embodiment, the round screen is deformed by the doctor in the direction of the counter-pressure cylinder elastically and thus employed. When a counter-pressure cylinder pit passes through the nip point, the squeegee is moved radially inward so that the deformation is canceled out when the squeegee contact continues to exist and the round wire lifts off from the impression cylinder. In a second variant, the round screen with doctor blade is lifted altogether during Nippdurchgang the pit.

By the EP 1 820 646 A2 a printing machine is known, which in one embodiment comprises a screen printing machine comprising a round screen and a squeegee, as well as a plurality of offset printing units and a dryer. In order to prevent the collapse of a counter-pressure cylinder pit a collapse of the round screen, a protruding in this section over the remaining surface area layer is applied to the round screen on the corresponding peripheral portion.

Also the EP 1 717 028 A2 discloses a printing machine having a screen printing unit and offset printing units, wherein, however, the screen printing cylinder carries a screen supporting the protection on a circumferential section corresponding to the impression cylinder pit.

In the US 5,630,363A is disclosed a printing machine with a flexographic printing unit and an offset printing unit.

The EP 0 723 864 A1 discloses a rotary screen printing unit with a screen printing form and a doctor blade, wherein the doctor blade is turned off by a cam control during the passage of a counter-pressure cylinder pit through the nip and subsequently turned on again until the next passage.

Also in the EP 1 246 726 B1 a squeegee is turned on and off via a cam to the screen printing form, which should alternatively be able to pneumatically, electronically or hydraulically. The doctor blade is movable in a purely translatory manner on a doctor blade holder arranged rigidly on the machine frame. In addition to this, in the case of wear, a linear readjustment of the doctor blade can take place.

By the EP 1 724 113 B1 a storage device for a round screen of a Siedruckwerks is known, wherein the round screen is mounted on both sides in independently axially movable brackets. Via eccentric bearings on both sides, a center distance to an impression cylinder can be adjusted and, via an additional eccentric bearing on one of the sides, an axial inclination can also be varied. About an axialrelativbewegliche helical toothing in the drive train is a circumferential position relative to the impression cylinder variable. An extending inside the screen cylinder and a doctor-bearing blade holder pneumatically diametrically to the frame movable.

In the EP 2 848 406 A2 a blade carrier receiving a doctor blade is in each case swiveled to set a doctor angle by means of a motor provided for this purpose. The doctor blade plates supporting the doctor carrier are in turn pivotally mounted on a frame part for engagement and disengagement of the doctor blade and can be pivoted by a pressure medium cylinder. The in-set position center distance to the impression cylinder is hereby adjustable by a screw acting as a stop. About one Adjustment eccentric is also a contact line of the squeegee in Nipp between Siebdruck- and counter-pressure cylinder present tangential direction possible. Finally, the screen printing device with doctor carrier and the Rundsieb overlapping subframe is pivotally mounted on a machine frame and a total of on and off by a fluid-operated cylinder.

The DE 75 02 041 U and the EP 0 071 014 A1 disclose screen printing units with a squeegee device.

The AT 343 075 B relates to a squeegee device for a cylinder printing machine with a doctor blade, which is adjustable by pivoting about a coincident with the contact line pivot axis in the squeegee angle, and by pressing a squeegee supporting the inflatable body from the inside against the pressure cylinder is adjustable. The invention has for its object to provide a printing unit and a method for operating a doctor device.

The object is achieved by the features of claim 1 and 21, respectively.

Advantageous developments of the present invention are the subject of the dependent claims.

The advantages that can be achieved with the invention are, in particular, that a machine or printing stage which operates in a particularly variable manner with regard to its range of application is provided, if appropriate, inter alia, by a printing-through method.

In a special embodiment as a pure further processing and / or finishing stage, a high quality can be ensured by means of a through-printing printing stage-preferably a particularly variable design-without this being done at the expense of the overall productivity in the printing works.

Of very particular advantage of variable to be used printing stage, especially screen printing stage, axes of movement of actuating movements of a doctor blade are located straight or largely in their theoretical direction of action. Regardless of this, or preferably in addition thereto, it is particularly advantageous to continuously perform adjusting movements in at least more than two stages, in particular at least in the operating range provided.

In a particularly advantageous embodiment of a squeegee and the printing form comprehensive printing device, this is not only in print-on and print-Ab, but also to spend in a maintenance and / or set-up.

Advantageously, adjusting movements of the printing device are realized via as few movement axes as possible.

It is also of particular advantage that adjustments to variable substrate thicknesses and / or to variable screen thicknesses and / or to varying printing format lengths during setup can be carried out particularly simply and quickly. This applies in the same way to changes in parameters that are required during the printing process due to changed conditions and / or pressure quality reasons.

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

Fig. 1

eine schematische Darstellung für die Ausführung einer einen flächigen Bedruckstoff be- und/oder verarbeitenden Maschine mit wenigstens einem Siebdruckaggregat;

Fig. 2

schematische Darstellungen für die vorteilhafte Ausführung einer als Weiterverarbeitungsmaschine ausgeführten Maschine mit einem Siebdruckaggregat und a) einem nach einem rotativen Tief- oder Hochdruckverfahren arbeitenden Druckaggregat sowie b) einem diesem zusätzlich vorgeordneten Konditionieraggregat;

Fig. 3

eine schematische Schnittansicht einer mit einem Gegendruckzylinder zusammen wirkenden Siebdruckform;

Fig. 4

eine Schrägansicht einer die Rakel an einem Gestell lagernden Lagereinrichtung;

Fig. 5

eine schematische Darstellung der Rakel bzw. deren Rakelblattes in einem An-Abstellzyklus;

Fig. 6

eine schematische Darstellung eines An-Abstellzyklus in Abhängigkeit von der Bedruckstofflänge;

Fig. 7

eine schematische Darstellung eines An-Abstellzyklus in Abhängigkeit von der Druckbildlänge;

Fig. 8

eine schematische Darstellung eines An-Abstellzyklus in Abhängigkeit von der Bedruckstofflänge;

Fig. 9

eine perspektivische Schrägansicht einer als Siebdruckwerk ausgeführten Bedruckstufe;

Fig. 10

eine schematische Darstellung unterschiedlicher Relativlagen zwischen Drucksieb bzw. Siebdruckzylinder und Gegendruckzylinder;

Fig. 11

eine Schnittansicht einer ersten Ausführung einer vom Siebdruckwerk umfassten Siebdruckeinrichtung;

Fig. 12

eine Schnittansicht einer zweiten Ausführung einer vom Siebdruckwerk umfassten Siebdruckeinrichtung;

Fig. 13

ein Längsschnitt durch eine vom Siebdruckwerk umfassten Siebdruckeinrichtung;

Fig. 14

ein erstes Ausführungsbeispiel für eine in der Lage der Berührlinie variierbare Rakel;

Fig. 15

ein erstes Ausführungsbeispiel für eine in der Lage der Berührlinie variierbare Rakel.

Show it:

Fig. 1

a schematic representation of the execution of a two-dimensional printing and / or processing machine with at least one screen printing unit;

Fig. 2

schematic representations for the advantageous embodiment of a running machine as a further processing machine with a screen printing unit and a) a working according to a rotary deep or high pressure printing unit and b) this one additionally upstream conditioning unit;

Fig. 3

a schematic sectional view of a cooperating with a counter-pressure cylinder screen printing form;

Fig. 4

an oblique view of a squeegee mounted on a rack storage facility;

Fig. 5

a schematic representation of the doctor blade or its doctor blade in an on-Abstellzyklus;

Fig. 6

a schematic representation of an on-off cycle in dependence on the printing material length;

Fig. 7

a schematic representation of an on-Abstellzyklus depending on the print image length;

Fig. 8

a schematic representation of an on-off cycle in dependence on the printing material length;

Fig. 9

an oblique perspective view of a designed as a screen printing stage;

Fig. 10

a schematic representation of different relative positions between printing screen or screen printing cylinder and impression cylinder;

Fig. 11

a sectional view of a first embodiment of a Siebdruckwerk embraced screen printing device;

Fig. 12

a sectional view of a second embodiment of a screen printing included screen printing device;

Fig. 13

a longitudinal section through a covered by the screen printing screen printing device;

Fig. 14

a first embodiment of a variable in the position of the contact line squeegee;

Fig. 15

A first embodiment of a variable in the position of the contact line squeegee.

A machine 01 which processes and processes a two-dimensional substrate B as a substrate B comprises at least one processing substrate B printed by a rotary printing process, in particular a screen printing process, in particular in the form of a printing stage 02. This is, for example, by a substrate B on at least one of its pages in at least one printing point 03 at least simply printing unit 02 given. The printing unit 02 is in particular designed as a rotary printing unit 02, in particular as a rotary screen printing unit 02, wherein the printing point 03 between a form cylinder 04, in particular screen printing cylinder 04, formed printing unit cylinder 04 and effective as an impression cylinder 06 printing cylinder 06 is formed. Basically, the processing stage 02 or the printing couple 02 may include a plurality of forme cylinder 03 or 03 pressure points, wherein the forme cylinder 04 then z. B. with different impression cylinders or advantageously with a same impression cylinder 06 together.

Although the machine 01 with respect to the processing of the printing material B may be limited to this one operating according to the screen printing process stage 02, in a preferred embodiment of this processing stage 02 in the Bedruckstoffweg the machine 01 one or more further processing stages 07; 08; 09; 11 before and / or downstream of the printing stage operating by the printing process by which or which of the printing material printed or imprinted by printing process in the same machine 01 inline in addition to one or more times processed in a through-pressure different way or can be , In this case, the machine 01 for the case of several other, different to the printing process stages 07; 08; 09; 11 processing steps 07; 08; 09; 11 different types and / or processing stages 07; 08; 09; 11 comprise a same kind, z. B. in the manner of a printing stage and / or in the manner of a conditioning stage. In the case of further processing stages 07; 08; 09; 11 of a same kind may be of different types and / or types, e.g. B. printing levels of the same or printing levels of different printing methods (eg, planographic printing, high pressure, gravure, digital printing or possibly other) or z. B. conditioning of the same type of treatment or different types of treatment (eg., Drying, moistening, cleaning or possibly other) belong.

In particular, by their execution as operating according to the rotary screen printing process stage 02 or as a rotary screen printing 02 this or this is while maintaining a fluid material movement in a particularly advantageous manner in a multi-stage processing and / or processing, eg. B. a multi-stage process for finishing, integrable.

This can in a first embodiment, the integration into a plurality as printing units 02; 07; 09; 09 'trained processing stages 02; 07; 09; 09 'comprehensive machine 01, which downstream and / or preferably upstream of the printing or screen printing 02 one or more further, operating according to a different printing method of this pressure stages 07; 09; 09 ', z. B. one or more after the offset printing process and / or one or more after a low or preferably high-pressure process and / or one or more after a druckformlosen or digital printing process, in particular inkjet printing process, working printing stages 07; 09; 09 ', (see eg Fig. 1 ).

In an embodiment of the machine 01 which is preferable with regard to quality and efficiency, the processing stage 02 or the rotary screen printing unit 03 which operates according to the screen printing method is - without any inline coupling with one or more after a planographic printing process, in particular after the printing process Offset method, working processing stages 07 provided. Preferably, the machine 01 comprising the at least one screen printing stage 02 is thus designed as a one-step or preferably multi-step further processing machine 01, in particular a finishing machine, which is provided on the input side in z. B. a temporally upstream and independent production step at least simply printed, in particular at least one or more times by the offset printed substrate B is supplied.

In other words, a preferred trained as processing or finishing machine 01 01 machine z. B. at least two of the further processing and / or finishing of previously in a separate, with respect to the material flow decoupled process printed substrate B serving processing stages 08; 09; on. In particular, the printing material B supplied on the input side has, for example, a printed image applied by offset printing at least on one side. The further processing or, in particular, finishing machine 01 is then restricted to further processing and / or finishing and is preferably designed without a planographic printing method, in particular without processing stages operating according to the offset printing method. In addition to a printing stage 02 working according to the through-printing method, this machine 01 may preferably comprise a printing stage 09-which in particular varies from a flat and / or offset printing stage-working according to a gravure or gravure printing process. Alternatively, or in addition, it can be used as a further Bedruckstufe also after a Digital printing process operating pressure level include, which can also serve for subsequent finishing and / or individualization and / or regularly reached not achievable by planographic production speed.

A plant for the production of printed products from -. B. still unprocessed or already pre-processed - B can then, for example, both one or more such processing or in particular finishing machine 01 and at least one z. B. faster-moving, not shown here flat printing machine, in particular offset printing machine, with one or more preferably after a planographic printing process, for. B. the offset method working printing stages, in particular printing units include. While these may in principle comprise one or more additional printing stages operating in their particular inline to continuous printing material path from their original to the delivery, they preferably do not use a processing stage which operates according to a throughprint process, in particular a screen printing process. The printed products produced may be the end products themselves or intermediates.

A machine 01 embodied as a further-processing machine 01 comprises, for example, at least one of the screen printing stage 02 in the printing material path inline or preferably in front of a processing stage which operates according to a rotary gravure or preferably high-pressure method, in particular according to the flexographic printing method and / or the printing image in direct printing on the printing substrate B 09, which is embodied, for example, as a gravure printing or preferably as a high-pressure printing, in particular as a flexographic printing stage 09 or printing unit 09 (eg. Fig. 1 . 2a and 2b ). In addition to this or, if appropriate, instead of this, a further printing unit 09 ', which works according to a printing-formless or digital printing method 09' of the planographic printing stage 02, may be post-arranged or preferably arranged as a further printing stage 09 '.

In a particularly advantageous development of the through-pressure stage 02 and this exactly or at least one further Bedruckstufe 09; 09 'one of the conditioning of previously printed substrate B, in particular a powdering processing stage 08, such as a z. B. a calendering comprehensive conditioning stage 08, be provided as conditioning 08. The latter may also be referred to as a cleaning stage 08 and / or a suction agent and / or blowing agent and / or mechanical stripping or other suitable for cleaning agents comprehensive conditioning stage 08 be executed. Through this, for example, a powder to be removed, which was provided between the layers of the input material provided on the substrate B to prevent enticing the already printed surfaces.

For the execution of or another in the Bedruckstoffweg preferably designed as a pure finishing machine 01 machine 01, in particular a working flexo printing unit 09 is by this in a first advantageous embodiment ink, and in a second, preferred embodiment of paint, especially transparent paint , applicable. In the second case, the working after flexographic printing unit 09 is designed as a so-called. "Lackwerk" 09 and includes z. B. in a pressure fluid supply, not shown, or in a pressurized fluid supply device a supply of a paint applied to the pressure point.

In principle, such a processing stage 09 serving for processing, for example such a printing unit 09 or coating unit 09 designed as gravure printing or preferably as high-pressure printing unit 09, could also comprise one or more offset printing stages 07 inline in addition to the screen printing stage 02 be provided combined offset and Weiterüberarbeitungs- or finishing machine 01. However, this may require reductions in either the quality of the finishing or in the reduced compared to a possible performance Production speed of offset printing.

In both in an offset printing 07 and the processing or finishing inline comprehensive press 01 and in the embodiment as a pure, formed without offset printing machines finishing machine 01, the printing unit 02 working by the printing process in a first embodiment as a printing ink on the substrate B aufbringendes printing 02 , z. As screen printing 02, in a second, to be preferred embodiment varnish, especially transparent varnish applying printing unit 02, z. B. as a screen-printing unit 02, executed. In the second case, the printing unit 02, which operates according to the through-printing method, is designed as a so-called lacquer printing unit 02, in short coating unit 09, and comprises, for example. B. in a pressure fluid supply, not shown, or in a pressure medium supply means a supply of a paint applied to the pressure point.

In the stated embodiments of the machine, in particular as pure, d. H. Furthermore, in the printing material path, at least one processing stage 11 formed with means for accelerating the drying process can be provided in the printing material path, for example by means of a further processing and / or finishing machine 01 formed without a flat or offset printing method. B. in the manner of a drying assisting conditioning stage 11, in particular a dryer 11 may be provided. Such a dryer 11 is z. B. the printing or screen printing stage 02 downstream and / or designed as a thermally effective dryer 11, in particular as an IR dryer and provides, for example, an improved paint history, d. H. a result in the particularly smooth surface structure of previously printed with ink and / or paint bodies.

The processing stages 07; 08; 09; 11 of the machine 01 may be provided in a common frame or in separate but interconnected racks. In this case, the frame associated with the screen printing stage 02 or the latter comprises this associated part of the frame, for example, on at least one of its front side lying on the forme cylinder 04 pages an optionally temporarily closable opening 12, for. B. an inspection and / or maintenance hatch 12 through which - with low installation costs - a doctor change and / or a visual inspection of the forme cylinder inside during operation is possible (eg., Indicated in Fig. 1 ).

The machine 01 comprises on the input side a Substratzufufhreinrichtung 13, z. B. substrate template 13, in or on which the machine 01 on the input side preferably already printed, especially already printed in the offset process - substrate B - z. B. depending on the nature of the substrate to be processed B in stacks, in a scale flow, in rolls or coils - is provided for the supply or is. On the output side, it comprises a substrate delivery device 14, z. B. display 14, in or on which of the machined in the machine 01, for example, further processed, in particular grafted substrate B 'after passing through the provided in the Bedruckstoffweg processing stages 07; 08; 09; 11 for pickup, z. B. depending on the characteristics of the processed substrate B in stacks, in a shingled stream, in rolls or windings, is provided. Between the last processing stage 07; 08; 09; 11 and the display 14 may be an extended transport path 16, z. As a so-called. Extensions extension 16, be provided by which the transport time and thus the drying time is extended to the formation of the ready-to-pick-up container on the display 14 and / or on which one or more additional, formed with means for accelerating the drying process processing stages 17th , z. B. one or more, for example, as a radiation dryer 17, in particular as a UV dryer 17 running dryer 17 are provided. Instead or in addition to this, in the unextended or preferably extended transport path 16, a device 18 for quality control may also be provided, which may be, for example, an image acquisition device, for example a camera, or at least may comprise.

Although the printing substrate B for the previously described machines and in variation to subsequent representations basically also formed web-shaped and the machine 01 can be designed as web-and / or processing, the printing material B is given here in a preferred embodiment by arcuate substrate B, wherein the Machine, but at least the Siebdruckstufe 02 and possibly one or more downstream downstream processing stages 07; 08; 09; 11 comprehensive part, designed as bow-and / or processing. The term "sheet" here, for example, any type of flat substrates B understood, which as isolated material sections z. B. not like web-shaped substrate simultaneously through all processing stages 07; 08; 09; 11 of the machine 01 is guided, but have such a limited section length, so that they at least a first already processed processing stage 07; 08; 09; 11 left before leaving with a last of the processing stages 07; 08; 09; 11 come into operative contact. In particular, these are flat and preferably rectangular printed sheets B, which may be formed, for example, from paper, cardboard, cardboard, plastic, metal or a composite of a plurality of said materials. For example, the term "flat" means that a length and a width of the printing material B correspond in each case to 50 times, in particular at least 100 times, or even at least 500 times, the thickness of the sheet.

In the embodiment as an arcuate substrate B or printing material B loading and / or processing machine, hereinafter briefly as sheet processing machine 01, this includes, for example, in addition to the z. B. referred to as an investor 13 substrate template 13 in the Bedruckstoffweg the first processing stage 02; 07; 08; 09; 11; 16 upstream, for example, as a system 19 or sheet 19 designated alignment. The substrate delivery device 14 is formed by a delivery 14, which is designated, for example, as a product delivery 14. The screen printing stage 02 and possibly one or more of the above-mentioned further processing stages 07; 08; 09; 09 ';11; 16 is between the substrate supply means 13 and the substrate discharge means 14 are the one or more processing stages 02; 07; 08; 09; 09 ';11; 16 arranged.

The feeder 13, the one as printing stock on z. B. a stacking plate mounted stack of sheets preferably comprises not shown in detail Bogenvereinzelungsorgane and sheet transport organs, which are designed for example as a vacuum cleaner and as a transport suction and are. To the so-called. "Change" of the sheet stack, d. H. the reloading of the investor 13 with a new stack of sheets to avoid stopping the machine 01, the feeder 13 is equipped with a non-stop device not shown here. This non-stop facility has z. B. on a retractable into the stack template area of the investor 13, arranged on a plug-in auxiliary stack carrier, which is designed in particular as a rake, roller blind or plate.

The z. B. also referred to as a stack feeder or sheet feeder 13 follows downstream, for example, a z. B. as a belt table, in particular as Saugbändertisch, formed conveyor line 21st

The sheet feeder 19 preferably comprises a feed table, wherein in the working cycle of the printing material to be supplied in the path of movement of the same to their orientation z. B. as so-called front lays designated attacks, in particular front stops are performed. The attacks is z. B. arranged in particular as a swing gripper 22 arc acceleration means 22 downstream, which is aligned with respect to the leading edge and optionally with respect to a side edge printing material B a z. B. also as a feed drum 23, in particular transfer drum 23 designated conveying means 23 supplies. As an alternative to the stops, the sheet B can also be moved into its correct position during the movement of the oscillating gripper and can be transferred in an aligned manner to the feed drum 23. The feed drum 23 passes the coming of the conveyor line 21 forth Substrate sheet B directly or optionally via one or more other transfer drums on the transfer and / or serving as an abutment and preferably as a rotating body 06; 24; 26 trained funding 06; 24; 26 of the downstream first processing stage 02; 07; 08; 09; 09 '; 11, in particular in the case of a further processing machine 01 z. B. a preferably as a rotating body 24, in particular also referred to as a cylinder 24, transfer cylinder 24 or drum 24, formed funding 24 a gravure or high pressure compression stage 09, in particular a flexographic printing stage 09, or a z. B. also designed as a rotating body funding a druckformlos Working Bedruckstufe 09 '.

Is for further development of preferably designed as a further processing machine 01 machine 01 one of the Durchdruckstufe 02 and a preferably further Bedruckstufe 09; 09 'upstream conditioning stage 08, z. B. serving the removal of powder conditioning stage 08, provided, the printing material B from the feed drum 23 directly or possibly one or more further transfer drums to a z. B. referred to as a rotating body 26, in particular as a cylinder 26 or drum 26, trained funding 26 of the respective conditioning stage 08 passed.

In a preferred embodiment, at least those in the printing stages 02; 09; 09 'and in the possibly the Bedruckstufen 02; 09; 09 'upstream conditioning stage 08 on the substrate B with the respective processing tools 04; 29; 31 of the respective processing stages 02; 08; 09; 09 'cooperating conveyor 06; 24; 26; 28 as a rotating body 06; 24; 26; 28, in particular as a cylinder 06; 24; 26; 28 or as drums 06; 24; 26; 28 designates executed. Related processing tools 04; 29; 31 can in this case by the above for the print-through stage 02 already executed forme cylinder 04, by a in the further Bedruckstufe 09 with the rotating body 24 a pressure point forming cylinder 29, z. B. printing cylinder 29, or by a cooperating with this pressure-free printing device, and possibly by a in the conditioning stage 08 with the abutment forming rotating body 26 together cleaning tool 31, z. B. a powdering serving calender roll 31 may be formed as a processing tool 31. The cleaning tool 31, for example, as a - preferably "non-fluid" in particular "non-pressure fluid-carrying" (ie non-ink-bearing or non-paint-carrying) roller 31 - acceptance device 31 is formed.

The cleaning stage 08 may for example be designed similar to a printing unit, wherein one or more rollers 31 with a substrate B transporting counter-pressure cylinder 31 cooperate, but without applying a pressurized fluid or fountain solution to the substrate surface. In this case, this conditioning stage resembling a printing unit is designed without a pressurized fluid supply or supply. You can in contrast, however, with a discharge device or a container for receiving the removed impurities, eg. As powder.

The cleaning tool 31 can thus be arranged to act together as a roller 31 in rolling contact with the surface to be cleaned. Ion of an alternative, not shown, it can also be arranged as a suction or blow mold contactlessly interacting with the surface to be cleaned.

In a preferred embodiment as bow-and / or processing machine 01, the rotating body 06; 24; 26 for the acquisition or transfer of the printing material B to be funded in its peripheral portion holding means 32, for example, one or more in the circumferential direction of each other z. B. equidistantly spaced and explained in more detail below holding devices 32, z. B. gripper devices 32, in particular gripper bars 32, on.

Between the with the editing tools 04; 29; 31 cooperating rotating bodies 06; 24; 26 at least the printing stages 02; 09; 09 'and the possibly the Print stages 02; 09; 09 'upstream conditioning stage 08, the printing material B are either transferred directly or preferably via in each case at least one further, z. B. as a rotating body 33 formed conveyor 33, in particular also referred to as a transfer drum 33, which also in its peripheral region holding means 34, for example, one or more in the circumferential direction from each other z. B. equidistantly spaced holding means 32, gripper bars 34 have.

Is designed as a dryer 11, in particular as a thermal dryer 11 and preferably the display 14 and the possibly provided delivery extension 16 upstream conditioning 11 provided in Bedruckstoffweg, so in this transport via a rotating body 36, in particular as a cylinder 36th or drum 36 referred trained conveyor 36 done, which or which for application to desiccant, z. As a heated gas stream or IR radiation, with an appropriate means, for. B. a hot air blower or preferably a radiation source 37, in particular IR radiation source 37, as a processing tool 37 cooperates.

After the last downstream printing stage 02; 09; 09 'and a possibly downstream thermal conditioning stage 11, the delivery to a further processed printing material B' to the delivery 14 promotional conveyor system 38, which is preferably designed as a chain conveyor system 38 and for guiding and promoting a z. B. formed as a chain 39 circulating traction means 39, a number of sprockets 41 formed as drive and / or guide wheels 41 and for receiving and delivering the printing material B to be opened and closing, not shown here holding means, eg. B. gripper includes. In the field of recording the printing material, the previously open gripper to take over the sheet are closed, whereas they are used to deliver the sheet in the area of the display 14 z. B. be opened above the stack to be formed.

In a preferred embodiment of the further printing stage 09, this is designed as a printing stage 09 operating according to a direct printing method and / or high-pressure method, in particular as a printing stage 09 operating according to the flexographic printing method, in which case the cylinders 24; 29 are formed as counter-pressure cylinder 24 and forme cylinder 29. The form cylinder 29 carries on the periphery of one or more printing plates whose raised areas are image bearing. The printing plates are colored by at least one roller of a printing fluid application device 42 (regardless of whether printing ink or lacquer is to be applied here as inking unit 42), in particular by an anilox roller, which in turn is inked by a inking system. The latter may comprise a roller immersed in a supply of paint or varnish, which colors the raster, and a squeegee which reduces excess ink on the raster roller. Preferably, the inking system is executed by a the chamber roller inking chamber doctor.

In an embodiment not shown here further, z. B. as an inkjet printing stage 09 'running pressure stage 09' or a further development with an additional additional pressure step is the pressurized fluid, d. H. the printing ink or varnish, applying tool 29 z. B. as one or more printheads, especially inkjet printheads formed.

The printing stage 02, which preferably takes the form of a screen printing stage 02 and functions according to the throughprint method, comprises a mold cylinder 04 designed as a screen printing cylinder 04. A printing form 43 carried by the forme cylinder 04 is for the preferred case of a printing unit 02 operating according to the screen printing method by a screen printing form 43 is given for the case of rotary printing, for example, as a so-called. Round sieve 43, which forms the or at least a portion of the cylinder jacket and a template with the negative of the printed image of a on the substrate B, ie the sheet B or a raport length of a web-shaped substrate B, to be applied repeat length. In the case of planographic printing, the printing form z. B. executed as Flachsiebdruckform. The printing form 43 rotating in the case of rotary printing and the printing material B move synchronously in operation via a mechanical or electronic coupling in such a way that each equal length is unwound. When guiding the substrate sheet B via a counter-pressure cylinder 06, both lateral surfaces roll over the printing substrate B to be printed substantially without slippage.

The pressure point 03 is formed by the Nippstelle between form cylinder 04 and impression cylinder 06.

For pushing through located in the interior of the round screen 43, z. B. formed as an ink or paint as printing fluid F through the open areas of the stencil of the printing plate 43, in particular by the uncovered mesh openings of a mesh or through openings in a prepared by electroforming printing plate 43, a certain compressive force is required. This is produced by means of a scraper 44, which acts as a squeegee 44, which effects a dynamic pressure of the pressurized fluid F held by it on the printing form 43. In a rotary sieve 43, the z. B. operatively rotationally fixed in the interior of the screen printing cylinder arranged doctor blade 44 in the region of a free, d. H. not clamped end portion, pressed with a pressing force from the inside against the rotating screen. The free, effective for the doctoring end portion may be through the front, effective as a doctor blade 52 part of the doctor blade 44 itself or - as shown here - by a part of a specially enclosed by the doctor blade 44 blade 52. In both cases, the doctor blade 52 thus designated forms a doctor blade edge on the end cooperating with the printing form 43.

The squeegee 44, in particular the squeegee blade 52 formed by it or encompassed by it in the region of the free end, is - in particular from the inside - forming a Also referred to as squeegee angle α, preferably acute angle α (ie α <90 °), z. B. one between 40 ° and 85 °, in particular between 70 ° and 85 °, to which - in particular trained as a round screen 43 - screen printing 43 engageable or hire. The hiring takes place in a section area at or adjacent to the nip 03 with the impression cylinder 06, z. B. within a peripheral portion in the screen printing plate 43, for example, at most ± 10 °, in particular at most ± 7 ° (around the Rundsiebachse) or for example at most ± 15 mm, in particular at most ± 10 mm (in Rundsiebinnenumfangsrichtung) of the line through the section line the undisturbed impression cylinder circumferential surface is given with the rotation axes in Anstelllage connecting plane. The doctor blade angle α should be understood to mean that angle which, when viewed in a sectional plane perpendicular to the axial direction of the printing plate 43, is in the contact point P of the doctor blade 52 between its free end and a doctor carrier 54 carrying the doctor blade 44 in the unloaded state, ie without Anstellkraft, just touching state extending longitudinal extent and the present at this contact line course of the perpendicular to the axial direction extending inner circumference line, ie the present at the contact point P "inner tangent" is formed or is. The contact, recognizable in cross-sectional representation as the respective contact points P, forms in the axial direction a contact line L1 that preferably runs axially parallel, which is also referred to herein as a "theoretical" contact line L1 due to the assumption of an unloaded, ie non-deformed operating state.

By a possibly applied during operation adjusting force can be a deflection, in particular reduction, of the actually effective at the contact point P effective angle over the above-mentioned manner via a deflection of - in the manner outlined above as part of the squeegee 44 or covered by this - defined doctor angle α are present. This possibly present under load deviation in the inclination of the present in the near-near blade section and / or the blade angle α corresponding inclination can for the subsequent subsequent consideration of preferred adjustment of the squeegee angle α (in the above definition) are neglected or disregarded. It is for example less than 10 °, z. B. less than 5 °.

The doctor angle α - as it is defined here in the just unloaded contact state, for example, can be in the range of 70 ° to 85 ° and be variable in the manner set out below. This angle α is -. B. an originally flat and straight shape assuming - for example, even under load and possibly resulting deformation in the doctor blade 54 directly adjacent doctor blade section.

In the case of a sheet-processing printing stage 02 or a sheet-processing machine 01, one or more retaining devices 32 offset from one another in the circumferential direction are provided on the circumference of the impression cylinder 06, through which the printing material sheet B can be received on the input side by the upstream conveying means and output to the subsequent conveying means. Basically, the recording, holding and dispensing by any suitable means, for. B. based on a switchable negative pressure and / or releasable positive locking, be formed. In schematically indicated and preferred embodiment here, however, are provided as holding means 32 a one or a group of several grippers 46 comprehensive gripping means 32, through which the printing material B on the input side at its leading end are receivable and output side to the downstream conveyor line again. The gripper device 32 is in this case z. B. in a provided in the otherwise cylindrical surface of the cylinder 06 and axially extending recess 47, also referred to as pit 47, arranged, whose radially outwardly directed opening, z. B. pit opening, the cylinder jacket-shaped lateral surface interrupts and disturbs. In a multi-size version of the impression cylinder 06, ie a counter-pressure cylinder with a circumference on which several printing material to be successively recordable, the corresponding number of Holding devices 32 and pits 47 in the circumferential direction one behind the other and each separated by a corresponding number of undisturbed cylinder jacket sections 48, also referred to as saddle or saddle pressure, separated.

A peripheral section U _{N which} can not be used as a pressure abutment can in principle be guided solely through the opening of the pit receiving the holding device 32 or possibly through this opening and, if provided, a functional section adjoining the forward and / or downstream side, for example an overlap area of a possibly upstream side provided, only here indicated by dashed lines tinting 49 and / or be followed by setting distance a _S to the trailing edge of the following pit opening, be given. Conversely, can be used for printing peripheral portion U _D basically by the lying between a leading end of the pit opening and the trailing end of the following in the circumferential direction the same or next following pit opening undisturbed cylinder jacket gate same.

An o. G. Einpräghilfe 49 may be provided to allow early setting of the doctor blade 44 in the forme cylinder 04 before reaching the pit end on the abutment-forming impression cylinder 06. It may be provided, for example, in the manner of a pivotable flap 49 on the impression cylinder 06, which pushes after gripping the printing material B via the gripper device 32 and thereby shortened in the circumferential direction length of the pit opening at least in the leading end of the printing material.

An effective at unwinding circumferential length of the screen printing cylinder 04 should be just or an integer multiple of the usable by the sum of the usable for the print length of the usable peripheral portion U _D and not usable for the print length of the disturbed, not usable as a pressure abutment peripheral portion U _N Cycle sounds L _Z correspond.

In the following, solutions are proposed by which individually or also advantageously in combinations of different requirements can be met to the desired print image, d. H. despite a wide variety of raster finenesses and Druckfluidkonsistenzen an optimal print quality for the relevant parameters can be achieved with the least possible effort. This is not only, but especially in connection with an above-mentioned, as processing and / or finishing machine 01 trained machine 01 of particular advantage, since such a machine 01 in a very diverse manner pre-printed intermediates in a variety of types and / or different printing or Bedruckstoffformates should be able to process.

In order to be able to adapt the printing stage embodied as a screen printing stage 02 to different printing fluids and / or different screen sizes and / or types underlying the printed image, the squeegee 44 is provided with its squeegee blade 52 with regard to a screen printing form 43, in particular a unit of length Adjusting force related to the contact line and / or variable with respect to the screen angle α formed with the screen inside at the level of the contact line in the above sense and / or adjustable.

The z. In Fig. 3 only shown schematically in the interior of the forme cylinder 04 doctor blade 44 is part of a doctor device 51, which -. In Fig. 4 can be seen - in addition to the doctor blade 44 itself and possibly the squeegee 44 and axially over at least the length of the doctor blade 44 extending blade carrier 54 at least one medium or directly on a frame 61, in particular on both sides, superimposed bearing means 53 includes. Preferably, however, in each case one end of the doctor blade 44 and the doctor carrier of the doctor blade 52 on both sides of respective side parts 59 of the z. B. also the forme cylinder 04 medium or directly supporting frame 61, storage bearing 53 includes. The doctor carrier 54 is for example by a single or Mehrteilge Traverse formed 54, on which the doctor blade 44 is arranged. As already stated, the doctor blade 52 may be formed by a front part of the doctor blade 44 itself, or may be included as a separate part of the doctor blade 44. In shown and preferred embodiment, the doctor blade 44 comprises a doctor blade 52 and a one- or multi-part doctor blade holder 58, on which the doctor blade 52 z. B. is releasably attached. The doctor blade carrier 54 carrying the doctor blade 44 is mounted, for example, in or on bearing means of the respective bearing device 53.

The squeegee device 51 further comprises one or more of the squeegee 44 and the squeegee 44 carrying doctor blade 54 relative to the screen printing or forme cylinder 04 moving drive means 56; 57, which z. B. via corresponding signal connections 62; 63 with the drive means 56; 57 controlling control means 66; 67 a merely schematically indicated control device 64 are connected. By way of example, first drive means 56 providing an activation and deactivation of the doctor blade 44 and / or second drive means 57 providing a change of a doctor angle α are provided. The drive means 56; 57 controlling control means 66; 67 of the control device 64 may be provided spatially in a same structural unit or else distributed in a signal-connected control system, wherein, for example, the control of the first drive means 56 concerning first control means 66 and the control of the second drive means 57 concerning second control means 67 may be provided. The control means 66; 67 may be configured as a control circuit or as a program routine programmed in data processing means. You can hereby as control modules 66; 67 a common control device 64 executed.

The blade carrier 54 and thus the squeegee 44 movably superimposed bearing device 53 is now designed and set up to pivot the squeegee 44 and this carrying squeegee carrier 54 about an axis of rotation R04 of the forme cylinder 04 axis-parallel pivot axis S1 and / or the radial position of Doctor 44 relative to Rotation axis R04 of the forme cylinder 04 to vary. Although both or only one of the two actuating movements mentioned could be or be caused by manually actuatable actuators, at least one drive means 56; 57 provided. In the event that two bearing means 53 are provided for mounting the doctor carrier 54, basically only one of the bearing means 53, but preferably each bearing device 53, can have a corresponding drive means 56; 57 may be provided.

In a particularly preferable embodiment, the bearing device 53, in particular its pivoting causing adjusting means, designed and adapted to make a pivoting of the doctor blade 44 and the doctor carrier 54 by the respective actuating mechanism such that when pivoting the doctor 44 and the doctor blade 52 by an adjustment angle Δα within at least one operationally provided adjustment range of z. B. at least 15 °, preferably of at least 20 °, the measured on the inner circumference of the round screen 43 in the circumferential direction relative position between one with the pressure in the rotation axes R04; R06 connecting level formed on the inner circumference of the round screen 43 cut line V and the theoretical contact line L1 is not or at least not significantly, z. B. by less than the hundredth part of the squeegee 44 acting together Rundsiebinnenumfangslänge changes. In operating position, d. H. in print-on, o. g. Section line V and the contact line L1 coincide or based on the rotational axis R04 of the forme cylinder or the round sieve 43 by a small angle, for. B. offset by up to 5 ° or at least up to 3 ° to each other.

To give the doctor 44 or its doctor carrier 54, the bearing means 53 comprises a on the frame 61 and the two side parts 59 of the frame 61 by a z. B. frame-fixed pivot axis S1 pivotally mounted bearing means 68, z. B. an eccentric trained bearing or preferably a lever arm 68. The doctor blade 44 carrying the doctor carrier 54 is now -. B. at a radial to the pivot axis S1 spaced location - connected to the lever arm 68 such that upon pivoting of the lever arm 68 as a result, a pivoting of the doctor blade 44 takes place.

In the particularly preferred embodiment of the squeegee device 51, the squeegee device 51, in particular the bearing device 53 and its relative position to the screen printing form 43, is embodied and arranged such that the pivot axis S1 of the lever arm 68 or lever arms 68 bearing the squeegee carrier 54 has the theoretical contact line L1 coincides. By "collapsing" should be understood, for example, an exact coincidence up to a coincidence with at most a slight, not fundamentally underlying solution thought not significantly affecting maximum radial offset between the theoretical contact line L1 and the pivot axis S1. This maximum offset corresponds for example to at most the tenth part, in particular at most the twentieth part of the present at the axial height of the interaction with the doctor blade 44 and the doctor blade edge Rundsiebinnenradius and / or for example at most 10 mm, preferably at most 5 mm. In the case of doubt, the geometrical center of the possibly forming, albeit extremely narrow, contact strip is to be used under the geometrically regularly not one-dimensionally extending contact line. Basically, this approach can be as far as nothing contradictory results on a Flachsiebdruckverfahren be formed as a flat screen trained printing form or be.

The lever arm 68 can basically in different ways, eg. B. by the eccentricity of a rotatably mounted on the frame 61 eccentric bearing or preferably be designed as an arm of a multi-arm or in particular one-armed lever 69. This can be in or on the frame 61 or in or on the respective side part 59 via z. B. designed as a bolt 91 or stub axle 91 bearing means 91 and possibly a friction-reducing radial bearing rotatably disposed about the pivot axis S1.

The at least one or preferably both the blade carrier 54 carrying lever arms 68 are pivotable by at least one, preferably by in each case one in particular remotely actuable drive means 71, briefly drive 71, which or which already o. Drive means 57 comprises. In this case, the drive device can in principle be designed in various ways to cause a pivoting of the lever arm 68 with appropriate actuation of the drive means 57. In this case, the drive 71 and / or the drive means 57 directly or via a transmission between a -. B. with respect to the frame 61 fixed to the frame and / or fixed with respect to a radial distance to the round screen rotation axis - point 73, z. B. pivot 73, and a lever-proof point 72, z. B. rigid pivot point 72, be effective.

The coupling in the attack points 72; 73 are preferably gimbals mounted on the frame 61, so that in addition to the pivoting movement, a possibly further explained below sideways movement, z. B. for setting a page register can be recorded.

Regardless of the expression with or without transmission, however, the drive means 57 is designed and arranged in a preferred embodiment, reproducibly more than two defined, respectively different positions of the lever arm 68 representing drive operating states, or briefly operating states to approach.

In a particularly advantageous development, the drive means 57 is designed and set up, at least within a setting range which, for example, corresponds to a pivoting of the lever arm 68 through an angle of 15 °, preferably of at least 20 °, to enable a continuous placement. This continuous placement is basically to be realized by a wide variety of configurations of the drive device 71, for example via a - possibly arcuate-rack, which by a z. B. electric motor driven pinion is pivoted.

In here z. As shown, preferred embodiment, the drive of the lever arm 68 via a drive 71 designed as a motor drive 71, wherein the spindle spindle gear and the spindle driving motor 56, in particular electric motor 57, can be summarized in a unit as spindle linear drive.

The drive means 57, which is preferably designed as an electric motor 57, can be actuated by the control device 64, in particular by the control means 67 implemented and appropriately configured and / or programmed in such a way that the drive 71-at least in this case-designed preferably as a motor-driven spindle drive 71 those operating conditions are to be approached, those within the above Actuate lying pivot positions of the lever arm 68 represent.

The drive means 57 embodied as an electric motor 57 can be embodied as a position-adjustable or as a stepping motor or can form a control loop for reproducible position taking with an external position sensor. In an advantageous embodiment, the electric motor 57 is designed as a servo drive.

The two actuators 71 or their drive means 57 which act indirectly on the doctor blade 44 or on the doctor carrier 54 can basically be made synchronous with one another by the control device 64 or the relevant control means 67.

By means of the - in particular remotely actuated - swivel drive for the doctor blade 44, the doctor angle α can now be changed to any new circumstances and / or during operation for optimizing the printing result without manual adjustment effort.

In addition to the adjustment of the doctor angle α can in an advantageous development. a device not shown here be provided by which the Contact line L1 in tangential direction parallel to the Rundsiebachse or at an angle to this can be adjusted. The adjustment can be possible both in the printing direction or against the printing direction. Again, the type of adjustment is preferably realized by motor and thus an adjustment in printing operation possible.

Considered as a particularly advantageous solution aspect on its own or particularly advantageous in connection with the above-mentioned pivot drive 71 about a preferably straight or at least substantially coincident with the theoretical contact line L1 pivot axis S1 is the doctor blade 44 and the doctor blade 44 carrying blade carrier 54 in their or its radial position relative to the screen printing form 43 variable. Preferably, this radial position in a control range is variable, in addition to stopping the doctor blade 44, ie lifting the doctor blade from the undisturbed inner circumference of the unloaded Rundsiebes 43 to a distance a _AN of z. B. at least 0.2 mm, beyond the first touch when hiring out pressing the doctor blade 44, in particular the doctor blade 52, ie a hiring of the doctor blade 44 under possibly slight deflection of the doctor blade 44 in the region of its free end portion or doctor blade 52 and / or the round sieve 43, which z. B. on the assumption of lying in the touch point zero position one points to a negative distance a _AB of z. B. to - 0.2 mm or more negative.

The term "shutdown" of the squeegee 44 is here and below, however, in an alternative embodiment - unless explicitly excluded - including a displacement of the squeegee 44 to the inside in such a way that the squeegee 44 still after "shutdown" - z. B. slightly - in contact with the screen printing form 43 remains, however, for example, the relief caused by the radial displacement of the doctor 44 to further inside, a lifting of the previously by deformation of the abutment, z. B. the impression cylinder 06, or the substrate B employed Siebdruckform 43 results. An adjustment causes in this case a deformation of the lifted screen printing plate 43 by a displacement of the doctor blade edge outwards by deformation of the screen printing plate 43 at least one contact with the abutment, for. B. the impression cylinder 06, or the substrate B results.

The doctor 44 or the doctor carrier 54 is for performing o. radial adjusting movement by at least one, preferably by in each case one in particular remotely actuable drive device 74, short drive 74, adjustable, which or which already o. g. Drive means 56 comprises. In this case, the drive means 74 may be formed in principle in various ways to effect a location of the doctor blade 44 and the doctor carrier 54 with respect to the relative position of the doctor edge to the round screen inside with appropriate actuation of the drive means. In this case, the drive 74 and / or the drive means 56 in principle directly or via a transmission between a -. B. with respect to the frame 61 and / or relative to the flight of the round screen rotation axis - fixed point and a rakel or Rakelträgerfesten point be effective. For the o. G. Case of or about one or two lever arms 68 pivotable blade 44 and blade carrier 54 is the drive 74 and / or the drive means 56 z. B. between a hebelarmfesten point and a rakel or Rakelträgerfesten point effective.

Basically, regardless of the expression with or without gear drive means 74 is provided with a controllable drive means 56 through which the arrival and Abstellbewegung the doctor 44 mechanically independent of the rotary drive of the form and the impression cylinder 04; 06 and / or of the machine and / or printing material phase position Φ _{M is} effected. In addition, by such a drive device 74 and the controllable drive means 56 is preferably the measure of employment or the resulting Anstellkraft in Anstelllage "AN", ie, for example, on the above-mentioned first touch in the direction of addition going movement of the doctor blade 44, variable.

These are the mechanically effective independent of the rotary drive radial effective drive 74th and the bearing means 53 carrying the squeegee 44 or the squeegee carrier 54 are preferably set up by means and designed to remotely vary the stroke of turning on and off, in particular at least the end position concerning the setting position "ON". This can preferably be made possible by means of a corresponding activation of the drive means 56 by the control means 66 set up for this purpose itself or, alternatively, optionally via activation of a drive of a stop means, not shown, which limits the setting movement. The variation of the strength of the job is z. B. in weggesteuerter doctor blade adjustment via a variation of the Anstelllage "AN" relevant end position by preferably a control of the drive means 56 itself with respect to a position to be taken or by possibly a position of the adjusting movement limiting stop means is varied. In an alternative embodiment with force-controlled blade control, the variation of the intensity of the adjustment can take place via a defined variation of a force acting on the drive means 56 on the output side in the adjustment direction.

Preferably, the drive 74 and / or in particular the drive means 56 is designed and arranged to reproducibly more than two defined, each different radial relative positions between blade edge and Rundsiebinnenfläche representing drive operating states BZ; BZ _AB ; BZ _AN ; BZ ' _ON , or briefly operating states BZ; BZ _AB ; BZ _AN ; BZ ' _AN , in particular two or even more than two different Anstelllagen or Anstellkräfte representing operating states BZ _AN ; BZ ' _AN to start or take (see, for example, in example Fig. 5 with a drive position BZ _AN representing a parking position "AB" and two different levels of engagement; BZ ' _AN shown). The specific, the associated Anzuflageender Anstelllage "ON" conditional operating state BZ _AN ; BZ ' _AN can z. B. in the control device 64 as relevant to the Anstelllage operating state BZ _ON ; BZ ' _ON . The determination and / or change of the operating state BZ _AN relevant to the setting position "ON" and to be taken into account by the control device 64 for the setting position "ON"; For example, BZ ' _AN can have one Operator interface done and / or effects of an evaluation of originating from an inspection system data can be effected.

In continuation of the above for the term "Abstellens" mentioned, is here and below in an alternative embodiment under the Ablagelage "AB" the squeegee 44 - unless explicitly excluded - also include a layer of the doctor blade 44, in which they with the screen printing 43 after the "shutdown" still -. B. slightly - is in touching contact, the screen printing form 43, however, for example, the discharge, which is caused by the radial displacement of the doctor 44 to further inside, from the abutment, z. B. the impression cylinder 06, or the substrate B is lifted. An Anstelllage "AN" is given by a displacement of the doctor edge to the outside, in which by deformation the previously lifted screen printing plate 43 at least in contact with the abutment, z. B. the impression cylinder 06, or the substrate B is located.

In particular, the drive means 56, which is mechanically independent of the rotary drive, and the squeegee 44 or the squeegee carrier 54 are arranged to vary the stroke of switching on and off, in particular the end position concerning the setting position, via the activation of the drive means 56. Basically, this approach can be as far as nothing contradictory results on a Flachsiebdruckverfahren be formed as a flat screen trained printing form or be.

In a particularly advantageous development, the drive means 56 is designed and set up, at least within a control range, for example, a positions of the doctor edge in at least one Mindeststellbereich between a parking position or a Abstelllage "AB" representing operating state BZ _AB and a Anstellposition or a Anstelllage "ON" representing operating state BZ _AN ; BZ ' _AN - for example within at least one setting range of z. B. -0.2 to +0.2 mm, in particular in at least one adjustment range of -0.2 to 0.5 mm, a to allow continuous placement. In this case, a sequence of equidistant discrete steps should be understood as "continuous", which is conditioned, for example, by restriction or rounding down to the smallest steps to be considered and / or hand-handled in the variable to be considered.

This continuous placement is basically to be realized by a variety of embodiments of the drive device, for example via an electric motor caused pivoting movement or otherwise. In here z. B. illustrated, particularly preferred embodiment, the drive of the doctor blade 44 and / or the doctor carrier 54 - within at least the o. G. Minimum setting range - along a rectilinear movement by a linear drive 74 designed as a drive 74. For this purpose, the bearing means 53 is formed with corresponding bearing means 81, 82 for the linear points. This linear drive 74 can be realized in different ways to turn on and off the doctor blade 44 or blade edge along a rectilinear adjusting movement. In a preferred embodiment, a continuous and controlled, d. H. defined, is possible, is also the measure of parking and / or in particular Hiring, d. H. the positive or negative distance, along the linear adjusting movement and thus also the adjusting force, also referred to as doctor pressure, variable and / or adjustable.

The linear movement could in principle be formed by arbitrarily designed, linear movements causing drive means 74. However, the linear drive of the squeegee 44 or of the squeegee carrier 54 preferably takes place by an electric motor. This can be realized by an electric linear motor or, preferably, by a drive 74 designed as a spindle drive 74, which is or are preferably operated by an electric motor. In this case, the spindle drive 74 is preferably designed as a ball screw 74. The spindle gear and the spindle driving motor 56, in particular electric motor 56, can - as exemplified - be summarized in a spindle linear drive forming unit.

The drive means 56, which is preferably designed as an electric motor 56, can be actuated by the control device 64, in particular by the control means 66 implemented and appropriately configured and / or programmed in such a way that at least the drive 74 - here preferably designed as a spindle drive 74 - continuously Operating states BZ; BZ _AB ; BZ _AN ; BZ ' _{AN are to be} approached, which represent the lying within the above setting range relative positions of the doctor blade 44 and blade edge to the circular sieve 43.

The drive means 56 embodied as an electric motor 56 can be embodied as a position-adjustable or stepper motor or can form a control loop for reproducible positional input with an external position sensor. In a preferred embodiment, it is designed as a servo drive 56, preferably with electronic position and / or speed and / or torque control.

It can for moving the both sides mounted doctor blade 44 and the both sides mounted blade carrier 43 and for both sides provided storage facilities 53 a common drive means 56 with a two sides with respect to the adjusting movement mechanically synchronizing coupling, z. B. a synchronous spindle or a crossmember, may be provided. In a preferred embodiment, medium or directly on the doctor blade 44 or on the doctor carrier 54 on both sides, d. H. in the region of both end faces of the screen printing stage 02 or the screen printing cylinder 04, such, the - preferably linear - locations of the relative position drives 74 and drive means 56 at. In the case of two drives 74 or drive means 56, these can preferably each independently of one another via z. B. the controller 64 be adjustable, z. B., however, if necessary, be synchronized with each other electronically.

By the - in particular remotely operable - actuator 74 for the doctor blade 44 and the blade carrier 54 can now on and off and the doctor blade pressing, ie the extent of going beyond the first touch stopping, and possibly the extent of the gap when parking without manual control effort to possibly new circumstances and / or even during operation to optimize the printing result to be changed. In an advantageous embodiment, two independently to be provided drives 74 and / or drive means 56 are provided. In this way, for example, the doctor pressure in the region of the two near-end doctor blade sections to each other differently adjustable and / or compensate for any eccentric, ie asymmetric with respect to the doctor blade length arrangement of the circular sieve 43.

The bearing device 53 and / or drive device 74 for the - preferably along the rectilinear at least in the adjustment range - on / off is designed and set up such that the adjusting movement between the arrival and the parking position "ON"; "AB" of the doctor blade 44 extends at least within the specified minimum adjustment range along the longitudinal extent of the doctor blade 52 running in the unloaded contact state. This should possibly also be understood to mean only slight deviations in the direction, for example, of not more than 5 °, in particular not more than 3 °, which do not significantly affect the fundamental solution idea. Under the "longitudinal extent" of the doctor blade 52 is in this case in the unloaded state perpendicular to the axial direction, d. H. perpendicular to the printing unit width, as well as perpendicular to the doctor blade thickness, d. H. its thickness, extending rectilinear extension of the free, d. H. understood not clamped end portion of the doctor blade 52 between clamping and blade edge. In a - at least in the unloaded state - regularly planar formation of the doctor blade, the adjusting movement accordingly takes place along a lying in the doctor blade plane direction, which may be understood in the case of a significant thickness of the doctor blade as doctor blade plane, for example, parallel to the surface running average cutting plane of the doctor blade.

By turning on and off the doctor blade 44 in the above sense along the direction of the present between clamping and doctor blade longitudinal extent is a place of the doctor blade 44 and / or the doctor blade 52 for the purpose of turning on and off and / or to the variation of the measure when hiring and / or when parking possible, without forced thereby the squeegee angle α changes or a change would have to be compensated by placing other actuators.

Although the driving device 74 set forth so far for the on and off movement can basically serve only for activating and deactivating the doctor 44 in the context of pressure-on and pressure-off or for maintenance or armament purposes.

However, in a particularly advantageous embodiment, the drive device 74 set forth, however, for the arrival and Abstellbewegung together with the controlling these controlling means 66 to be executed, the squeegee 44 operatively - ie during production - cyclically and synchronized to the machine and / or printing material phase position Φ _M , in particular medium or directly correlated to the rotational angle position of the impression cylinder 06, to relieve, in particular even slightly from the inner circumference of the round screen 43 to lift, and turn it back on. In this way, it is possible to prevent the doctor blade 44, due to its contact force, from preventing the round sieve 43 from rolling over in the region of any sieve seam (for example in the case of fabrics) which may be present and / or when the forming and impression cylinder 04; 06 is deformed unduly during passage of the pit opening or collided with the grippers 46 or other impression cylinder parts and damaged. In this case, an above Einpräghilfe 49 shorten the pit opening during rolling at least and / or cover the gripper 46 and thus the earliest possible hiring the doctor 44 to the round screen 43 and in the direction of the impression cylinder 06, and thus a timely structure of the Farbwulstes and back pressure in front of the squeegee 44.

A purely control-technical, so not based on mechanical coupling synchronizing a cyclically repeating arrival and Abstellsequenz to the machine and / or printing material phase position Φ _M , wherein the arrival and Abstellsequenz z. B. is formed by a cycle with one or more each interrupted by a Abstellphase P _AB Anstellphasen P _AN is, in principle, in a variety of ways to the rotational movement of a component involved in the substrate transport or to the control signals of the transport movement of the printing B determining control device , For example, the drive means 56 and / or the control means 64 controlling the drive means 56 or the relevant control means 66 are in signal connection to a machine and / or printing material phasing Φ _M and the control of the drive means 56 with respect to a length and / or position an arrival and Abstellsequenz as master serving phase position sensor 76, the z. B. as an angular position-providing and also referred to as Leitachsgeber 76 sensor 76 or preferably as a machine phase position predetermining and therefore representing electronic master shaft 76 is executed. The machine and / or Bedruckstoffphasenlage Φ _M representing information is in Fig. 4 by way of example with the machine symbol and / or printing material phase position Φ _M symbolizing angle symbol indicated.

In particular, in the case of the bow- and / or processing execution of the printing, in particular screen printing stage 02 and / or in the case of the sheet transport with at least one gripper device 32 running counterpressure cylinder 06, the doctor device 51 can thus a the on and off movement of the doctor 44 between the Anstelllage "AN" and a storage position "AB" enabling storage device 53 and a trained example og manner drive means 74 with correspondingly established control means 66 comprise, by which the doctor blade 44 synchronized in operation to a machine or printing material phase position Φ _M to the z. B. as a round screen 43 trained screen printing 43 and on this is abgestellt. The drive device 74 in this case comprises a controllable drive means 56, by which the on and Abstellbewegung of the doctor blade 44 mechanically independent of the machine and / or printing material phase position Φ _M is feasible.

The drive device 74 is thus preferably by the drive means 56 without mechanically rigid coupling to a machine element and / or printing material Φ _M representing machine element in at least one Anstelllage "AN" causing operating states BZ _AN or preferably in several the Anstelllage "AN" causing operating states BZ _AN ; BZ ' _AN and in at least one the Abstelllage "AB" causing operating state BZ _{AB be brought} about (see, eg. Fig. 5 ).

In a particularly advantageous embodiment and / or preferred embodiment of the above-mentioned doctor device 51, the control means 66 encompassed by the control device 64 and connected to the drive means 56 can be designed and arranged to operate the doctor blade 44 as a function of the substrate format F.1; F.2 and / or the printed image information I _B with varying phase lengths and / or positions on and off. In this case, by means of the control means 66 encompassed by the control device 66, a length and / or position and / or number of phases P _AN relevant to the setting position "AN" are determined within a fixed and repetitive sequence with regard to their cycle length L _Z, depending on the printing material format F. 1; F.2 and / or the printed image information I _B variable. Each revolution of the impression cylinder 06, a corresponding number of cycle length L _{Z can be} traversed in the case of a multi-sized version.

The substrate format F.1; F.2 and / or the printed image and processed information to be processed I _B , the control means 66 z. B. be made available via a signal connection from a planning and / or management level 77 forth. This may be the case, for example, in the case of a substrate format F.1; F.2 and / or the printed image relevant information - via a signal connection from one of the planning and / or control level 77 attributable to the control center or via a signal connection for the transmission of Data from product planning or via a signal connection for the transmission of data from prepress.

In a first example of the embodiment of the control means 66 and for controlling the blade movement, for. In Fig. 6 schematically indicated on the basis of a side view of a usable peripheral portion U _D Zylindermantelabwicklung, for example, in a first operating situation printing substrate B of a first format F.1, ie with a first Bedruckstoffläge L _B1 , and in a second operating situation printing material B sections of a second format F.2 , ie with a second Bedruckstoffläge L _B2 printable or be printed. Depending on the respective printing material L _B1 ; L _B2 or an information I _B representing this length, the phase length of the phase P _AN with the squeegee 44 on or, for this case, preferably, an end of the phase P _AN with the squeegee 44 engaged are determined by the control device 64 or the implemented control means 66 and / or takes place in dependence on the respective printing substrate L _B1 ; L _B2 or an information representing this length I _B on and off the squeegee 34 in a respective cycle Z ₁ ; Z ₂ (see, for example, Fig. 5 ), in which the differing Bedruckstofflägen L _B1 ; L _B2 deviating phase lengths for the respective phase P _AN with employee squeegee 44 or - for this case, preferred - different phase positions for the end of the respective phase P _{AN are assigned} with squeegee 44 employed or are. The phase position for the beginning of the respective phase P _AN with employed squeegee 44 can each have a same and z. B. fixed, but may be changed if necessary. This can, for example in the manner outlined above, lie before the beginning of the peripheral section U _{N which} can be used for printing.

In a second, possibly instead of or optionally for the first embodiment feasible or providable embodiment, for. In Fig. 7 schematically indicated on the basis of a side view of a usable circumferential portion U _D cylinder jacket processing, the phase length of the phase P _{AN is} employed with doctor blade 44 or at least one end of the phase P _AN with employee squeegee 44 by the controller 64 and the control means 66 in dependence on the respective print image length L _D or a length representing information I _B determined. Under the print image length L _D is z. B. in this case be understood that length, the flow side by the first and return side is limited by the last given by the round screen 43 printing plate to be provided inking. A hereby given intermediate pressure region 78 can have continuous or discontinuous pressure regions 44. It is done for operating situations with differing print image length L _D as a function of the respective print image length L _D or a length representing information I _B on and off the doctor 44 in a respective cycle Z ₁ ; Z ₂ , in which the mutually differing print image lengths L _D different phase lengths for the respective phase P _AN with staff doctor 44 or deviating phase positions for the end of the respective phase P _{AN are assigned} with employed squeegee 44 or are. The phase position for the beginning of the respective phase P _AN with employed squeegee 44 can each have a same and z. B. fixed, but may be changed if necessary. This can, for example in the manner outlined above, lie before the beginning of the peripheral section U _{N which} can be used for printing. The phase position for the beginning of the respective phase P _AN with doctor 44 engaged can in this case be, as above, each one the same or one dependent on the print image beginning phase.

In a third, possibly instead of or optionally to the first and / or second embodiment feasible or providable embodiment, for. In Fig. 8 schematically indicated on the basis of a side view of a usable circumferential portion U _D cylinder jacket processing, each cycle length L _Z several phases P _{AN can be provided} with an employee squeegee 44 and a plurality of phases P _AB with staff doctor 44. In this case, a beginning and an end of the respective phases P _AN with employed squeegee 44 by the control device 64 and the control means 66 in dependence on information I _{B is} determined which the considered in the transport direction phase position of non-printable strips represent discontinuous print strips 79 of a print area 78. For individual operating situations with differing patterns of strips to be printed and not to be printed, an individual information I (M) representing the distribution of the printing strips 79 or information I (M) corresponding to this distribution is applied to the doctor 44 several times a respective cycle in which the different from each other in the distribution of the pressure strip 79 pressure ranges 78 different patterns for the phase angles and / or lengths, ie the position of the respective beginnings and ends, the respective phase P _{AN are assigned} with squeegee 44 employed or . become. The information relating to the print pattern information I _B to number and / or position of the print strip 79 is based, for example, on data obtained by evaluating the printed by the printing stage 02 and the printing plate 43 to be printed image, in particular by evaluation of z. B. are obtained in the prepress stage in data form target printed image or are. In this case, to be printed strip, which can be replaced by z. B. narrower not to be printed stripes are broken despite its discontinuity to be larger print strip 79 summarized or become.

In particular, in connection with the first and the second embodiment is by the control device 64 and the included control means 66 within the preferred fixed cycle length L _Z, a ratio between the related to the length of the swept inner circumference on the screen printing phase length of the Anstelllage "AN" phase in question P _AN and the parking position "AB" phase P _AB variable.

Regardless of whether the control means 66 comprises a control circuit and / or control routine for the above-mentioned cyclic and synchronized locations, adjusting the amount of at least stopping, ie adjusting the force applied in the phase of the Anstelllage "AN", manually via an operator interface, z. B. via an operator interface provided on the control panel, are selected and / or varied.

In a preferred embodiment for the doctor device 51 and / or bearing device 53, this is both with a drive 71 and possibly corresponding storage means for varying and / or setting the doctor angle α and with a drive 74 and possibly corresponding storage means for turning on and off the squeegee 44 provided on the designed as a round screen 43 printing plate 43. Preferably, in this case, the bearing device 73 is designed such that when setting the doctor angle α by means of the drive means 71 provided for this purpose, the drive 74, in particular linear drive 74, which causes the squeegee 44 to come on and off is forcibly moved by the doctor 44.

In this case, drive 74 and, if appropriate, corresponding bearing means for switching on and off the squeegee 44 are arranged on the lever 69 pivotable about the pivot axis S1, in particular on the lever arm 68 carrying the squeegee carrier 54, wherein the drive 74 is effective between a lever-fixed point of attack and a rakelträgerfesten attack point is.

In a preferred embodiment, the rocket-proof point of attack is provided by a bearing means 81 designed as a rack carrier solid carriage 81, which is mounted linearly movable in a bearing means 82 designed as a lever-fixed guide 82, in particular a linear guide 82. In particular, the linear guide 82 is arranged on the lever 69 or lever arm 68 and oriented so that - in at least o. G. Minimum adjustment range - the resulting when moving the carriage o. G. Adjusting movement of the doctor blade 44 along the extending in the unloaded state of contact extending longitudinal extent of the doctor blade 52.

The lever 69 or lever arm 68 is in this case preferably one in o. G. Way stored with an approximately coincident with the doctor edge pivot axis S1.

The frame-fixed point of attack 73 for the squeegee angle change causing drive 71 can basically at the Siebdruckstufe 02 associated frame 83 and

Frame part 83 may be provided, which forms, for example, the operatively fixed space printing frame 83.

Preferably, however, at least the screen-printing form 43 is mounted on a frame 61 of a screen-printing device 86 in a medium or direct rotatable manner. In this case, the screen printing form 43 can be changed by means of a drive device 88 which engages the frame 61 and can be actuated remotely and can be actuated at a distance from the axis to the impression cylinder 06. Preferably, the screen printing form 43 and the doctor blade 44 are jointly movable by the drive means 88 for Achsabstandsänderung between the impression cylinder 06 and the screen printing plate 43. For this purpose, they are preferably mounted directly or indirectly on the same one-piece or multi-part, generally movable frame 61. In particular, the frame 61 by the drive means 88 relative to a z. B. the impression cylinder 06 and possibly at least one transfer drum 33 supporting frame 83, z. B. o. G. space-fixed printing unit frame 83, movable frame 61 stored. The lower part of the printing unit 06 comprising the counter-pressure cylinder 06 and possibly at least one transfer drum 33 is also referred to as the printing unit substructure 91 and may be designed as a total of the machine space as an insertable sub-module 91.

The movable frame 61 forms together with the components arranged thereon z. B. the on and off screen printing device 86, which includes at least the screen printing form 43 carrying screen printing cylinder 04 and the engageable with the screen printing plate 43 and / or employee doctor 44 in addition to the frame 61.

In the case of a bearing device 53 mentioned above with bearing means 68; 69; 91 and a drive means 71 for varying the squeegee angle α are also included by the screen printing device 86. These are moved, for example, by the drive device 88. In addition or instead, in the case of an abovementioned bearing device 53 with bearing means 81; 82 and a drive device 74 for switching on and off the squeegee 44 also includes this of the screen printing device 86 and, for example, moved along.

The drive means 87 effecting the axial distance change is embodied in a preferred embodiment and adapted to operate in a pressure-on position L _{D of} the screen printing form 43 on the impression cylinder 06, operating state BZ _D and one different therefrom, a pressure-off position L _A a defined relative to the first position L _D larger center distance a between the impression cylinder 06 and the screen printing form 43 and reproducibly assumed defined operating state BZ _A reproducibly take at least one further defined operating state BZ _R , which a layer L _R with respect to the first two layers L _A ; L _{D represents} greater center distance a. This further position L _R , z. As maintenance and / or set-up L _R , for example, for set-up or maintenance work, for example as a cleaning pad for cleaning the screen printing 43 and / or as a set-up for a printing form change in the case of z. B. formed as a flexible flat screen and up or unwound printing form 43 be taken or be. For the setup position L _R , the center distance is a z. B. at least 50 mm, preferably even at least 100 mm over that of the pressure-on-layer L _D enlarged.

In a first, z. B. with regard to the control of little complex advantageous embodiment, the drive means 88 included by the drive means 87 may be formed as a fluid-operated actuator 87. In this case, it can be designed as a pressure-medium-operated cylinder-piston system 87, in particular as a multi-position cylinder-piston system 87 with a total of at least three defined piston positions on the output side. For example, it comprises altogether exactly or at least three different defined operating states BZ _D ; BZ _A ; BZ _R representing switching states. In this case, for example, for the maintenance and / or set-up L _R a switching state with a pressing of two chambers in a same, the Stopping effecting direction, for the pressure-off position L _A a switching state with a pressing only one chamber in the stopping effecting direction and for the pressure-on-layer L _D a switching state with a pressing two chambers in a same, the hiring be provided effective direction. For this purpose, the cylinder-piston system 87 is preferably designed to be double-acting, at least with regard to the introduction into the pressure-on-position L _D , ie with a piston stroke chamber which can be pressed in both the stopping direction and in the setting direction. Preferably, both of z. B. two chambers designed so double-acting. Although basically also a hydraulic operation can be provided, the cylinder-piston system 87 is preferably operated pneumatically.

The operating state BZ _D assumed in pressure-on can - as far as the output-side state of the drive means 87 is concerned - be basically freely receivable and limited only by a maximum end position to be assumed. The operating state BZ _D actually assumed in pressure-on can be limited and / or varied, for example, by a positioning device 107 set out in greater detail below.

In an alternative embodiment, which is advantageous with regard to greater variability, the drive means 87 encompassed by the drive device 88 can be considered to be at least one of the two farthest apart of the two operating states BZ _R ; BZ _D given adjusting range continuously adjustable drive means 87 executed. In this case, the drive device 88 is designed, for example, as an electromotive linear drive 88 and / or as an electric motor driven spindle drive 88. The drive means 87 is then correspondingly by an electric motor, such as an electric linear motor or z. B. executed by an electric motor servo drive

The moving of the screen printing plate 43, in particular of this carrying screen printing cylinder 04 and the screen printing cylinder 04 supporting frame 61 can basically in any kind -. B. translational or rotary - realized by which is a relative movement with at least one of the counter-pressure cylinder axis radial movement component is effected or effected. In a preferred embodiment, the drive device 88 and corresponding bearing means 89 are, however, designed and arranged such that the adjusting movement leading out of this position for the unloaded contacting contact is approximately, ie with a maximum deviation of at most 15 °, preferably of at most 10 °, in the radial direction of the impression cylinder 06 runs. Although this movement can be carried out in a variant by a linear movement with appropriately designed bearing means. In a preferred here, by simple means and a large travel enabling embodiment is carried out for the pivoting movement about a counter-pressure cylinder 06 axis-parallel pivot axis S2. In this case, the frame 61 which carries the screen printing form 43 or the screen printing cylinder 04 is preferably mounted so as to be pivotable about the pivot axis S2 which is axially parallel to the impression cylinder 06. Corresponding bearing means 89 are then formed, for example, by a bolt 89, an axis 89 passing through the frame width or an axle stub 89.

To fulfill the above condition to the present in the region of the nip 03 and the adjustment of a large travel an above maintenance and / or set-up L _R , the pivot axis S2 is advantageous in a plane E, which includes a contact line L2, which in the Nippstelle by which is given in the unloaded state just touching Druckform- and counter-pressure cylinder jacket surface, and at most by 10 ° inclined to the contact line L2 comprehensive tangent T of undisturbed Gegenruckzylindermantelfläche runs. In this case, the distance of the pivot axis S2 to the circular sealing axis R43 is preferably greater than the length of the outer radius r43 of the undisturbed screen printing plate 43.

A respective front-side frame wall of the movable, in particular pivotable frame 61 of the screen printing device 86 can by the z. In Fig. 4 illustrated Frame wall 59, z. B. the side part 59, itself or by a side part 59 comprehensive multi-part side wall 92 may be formed. For example, the bearing device 53 carrying side part 59 releasably on a frame wall 93, z. B. a stronger frame plate 93, the frame 61 and be included together with this of the multi-part side wall 92. The medium or directly carrying the screen printing form 43 frame 61 comprises, in addition to the one or more part side walls 92 one or preferably a plurality of cross braces 94; 96; 97, which may be formed, for example, by one or more traverses 96 and / or by one or more shafts 94 (see below) and / or by one or more axial guides 97 (see below).

The frame 61 pivoting drive means 88 is effective between a respect. The screen printing device 86 fixed to the frame attack point 98 and a spatially fixed, for example. With respect to the printing unit frame 83, fixed point 99. For example, the point of application 98 on the side of the screen printing device 86 may be given by a coupling to a frame axis fixed with respect to the screen printing device 86 and axis of rotation parallel to the screen printing plate 43. This can be realized by a rotatable coupling to a relative to the screen printing device 86 frame-fixed axis 94 or by a rotationally fixed coupling to a rotatably mounted on the frame 61 shaft 94. Preferably, a drive device 88 may be provided per end face, both of which on a extending from one to the other side shaft 94, z. B. synchronous shaft 94, attack. The coupling of the drive means 87 encompassed by the drive device 88 can be achieved on the output side via one or more transmission and / or transmission mechanisms 101, for example via a lever mechanism 101 (see, for example, FIG. Fig. 11 ), or - except for possibly provided output-side extension elements - directly (see, eg. Fig. 12 ) respectively.

In a first embodiment of the drive device 88, this includes a through the drive means 87 operable lever mechanism 101, in particular toggle mechanism 101 having a first rocker 102 and a rotatably connected thereto second rocker 103, wherein the respective free ends of these rockers 102; 103 at the above attack points 98; 98 are defined (see eg Fig. 12 ). The drive means 87 could in principle act on one of the rockers 102, 103, but acts in the case described here via a lever arm 104 on the rotatably connected to one of the rockers 102, 103 shaft 94. Depending on the operating condition BZ _D ; BZ _A ; BZ _{R of} the drive means 87, z. B. piston-cylinder system 87, which is by the rocker 102; 103 trained toggle more or less strongly angled, so that for the three correspondingly provided operating conditions BZ _D ; BZ _A ; BZ _R the three above-mentioned layers L _A ; L _D ; L _R can be realized for print-on, print-off and a set-up or wait.

In a second, z. B. with regard to a less complex mechanism advantageous embodiment of the drive device 88, the drive means 88 on both sides - possibly via a driven side and / or a fixed-point extension - directly, ie without further movement mechanisms, to the points 98; 99 coupled. In this case, the three operating states present on the output side cause BZ _D ; BZ _A ; BZ _R again the three above-mentioned positions L _A ; L _D ; L _R.

In addition to the at least two, in particular the at least three layers L _A ; L _D ; L _R for driving on and off of the screen printing 43 causing drive means 88 is provided in a preferred embodiment, a positioning 106 comprehensive positioning means 107 for remotely operated and / or remotely controlled adjustment and / or variation of the defined pressure-on position L _D. The positioning drive 106 can be adapted to the position of a radial bearing which concerns the mounting of the screen-printing cylinder 04 or the position of a member of the drive device 88 which concerns the on and off (see, for example, FIG. Fig. 12 ) act or on a stop element 108 one of the positioning device 107 included, the adjusting movement in the desired pressure-on-position "L _D " limiting abutment means 109 (see eg. Fig. 12 ).

By the positioning means 107 and the positioning drive 106, the axial distance a z. B. at least by at least 0.1 mm, preferably by at least 0.2 mm, possibly even by 0.3 mm and more, variable. As a result, adjustments to variable printing substrate thicknesses and optionally varying screen thicknesses and / or slightly varying outer diameters of the screen printing plate 43 are possible.

The pressure-on position "L _D " may be selected so that just just contact between the round screen 43 and counter-pressure cylinder 06 takes place, which is also referred to as a so-called. "Kissprint". Alternatively, however, an axial distance a can also be selected for the pressure-on-position "L _D ", so that in print-on-position "L _D " of the screen printing form 43 but offset doctor blade 43 is greater than zero between the circular sieve 43 and the impression cylinder 06 is present. The round sieve 43 in this case only touches the counterpressure cylinder 06 when the doctor 43 is in an engaged and pretensioned position due to slight deformation.

In the case of the first embodiment of the drive device 88 (see eg. Fig. 11 ), the positioning drive 106, for example, a change in length for one of the two rockers 102; 103 effect, for example, by itself as a rocker or part of the rocker 102; 103 acts and is variable in its longitudinal extent between frame-fixed and abtriebseitigem end.

In the case of the second embodiment of the drive device 88 (see eg. Fig. 12 ), the positioning drive 106 may be designed as a stop element 108 stellender actuator. For example, the positioning drive 106 moves a wedge-like stop 108 of a wedge-shaped stop device 109, which cooperates with a second wedge-like stop 11. One of the two stop elements 108; 111 is now operative with respect to the frame 61 of the screen printing device 86 fixed to the frame and the other operationally fixed in space, especially with respect to the printing frame 83 rack-fixed. To set the stopper 109 is one of the stop elements 108; 109 adjustable in the manner of the wedge drive relative to the other.

The positioning device 107 and the positioning drive 106 are preferably designed and set up, at least within an operational minimum range, for example, a resulting variation of the axial distance a by z. B. at least 0.2 mm, but at least equal to at least 0.1 mm, to allow continuous placement. This continuous placement is basically to be realized by a wide variety of configurations of the positioning drive 107, for example via a rack, which by a z. B. electric motor driven pinion is moved. However, in the preferred embodiment shown here by way of example, the positioning drive 106 is designed as a motor spindle drive 106, wherein the spindle drive comprising the spindle and the motor driving the spindle, in particular the electric motor, can be combined in one unit as a spindle linear drive.

In a particularly advantageous further development of the screen printing stage 02 and / or the screen printing device 86, the screen printing form 43 or the screen printing cylinder 43 carrying the screen printing cylinder 04 as a whole and / or an end bearing device 112 of the screen printing form 43 are arranged axially movable relative to the impression cylinder 06. Preferably, the two, the screen printing form 43 receiving end bearing 112 axially movable in the printing unit frame 83 or preferably in the above frame 61 of the total relative to the impression cylinder radially relatively movable screen printing 86 are arranged. The end-side storage facilities 112 are for this purpose, for example, in or on front-side support members 113, z. B. side wall 113, recorded or arranged, which in turn are mounted on one or preferably on a plurality of axially extending cross struts 97, in particular axial guides 97. The two support members 113 could be axially connected to each other and a training common movable rack. However, the two support elements 113 are preferably axially independent and movable separately from one another. A movement can be done manually or via respective, not shown axial drives or be effected. In particular, in the case of manually moving and / or movable support members 113 means 114, z. B. clamping devices 114 may be provided for locking the current position.

Thus, z. B. on a frame 83; 61, which may be formed by the printing unit frame 83 or preferably by a translational or rotationally movable, in particular swing-frame 61, medium or directly the screen printing cylinder 04 stored. It is z. B. on the frame 83; 61, which by the printing unit frame 83 itself or also preferably by the o. G. Subframe 61 may be formed, medium or directly arranged above the bearing 53 arranged. The latter can directly on the screen printing cylinder 04 medium or directly superimposed same frame 83; 61, z. B.an o. G. Frame plate 93, or indirectly via frame walls 59 on a screen printing cylinder 04 medium or directly overlapping frame part, z. B. to o. G. Frame plate 93, be arranged.

In a further development of the printing unit 02, in which the doctor blade 44 and / or the bearing means 53 carrying the doctor blade 44 directly or indirectly, on frame walls of a frame 61 directly or indirectly supported by the screen printing cylinder 04; 83 different subframe, z. B. on rack walls 59, is stored, this can the doctor blade 44 and / or the blade 44, the medium or directly bearing bearing device 53 supporting subframe relative to the screen printing cylinder 04 overlapping frame 61; 83 be movably mounted. In this case, in addition to the arrival and Abstellbewegung enabling storage, the doctor blade 44 medium or directly supporting bearing means 122; 123 is provided, via which the doctor blade 44 is mounted so relatively movable to the round screen 43 in the machine, so that the position of the contact line between blade edge and screen printing 43 in Rundsiebinnern in or opposite to the present in operation rotational direction is variable.

The variability or mobility can z. B. in a tangential, an inclined towards the Innentangente direction or in the circumferential direction, in particular along an Innentangente or an inner circumferential line section, but at least be given along a direction with at least one component of movement in the inner circumferential direction of the screen printing form.

For this purpose, the bearing device 53 is preferably together with the drive device 74 causing the on-and-off movement on an o. G. Rack wall 59 mounted, which, however, contrary to the above, not fixed, but in the manner of a movable bearing plate 59 relative to the screen printing cylinder 04 medium or directly overlapping frame wall 93 is mounted relatively movable.

In a first embodiment, the frame wall 59 carrying the bearing device 53 together with the drive device 74 can be mounted so as to be movable back and forth along the rectilinear, preferably substantially horizontal, adjustment path on the frame wall 93 which supports the screen printing cylinder 04 (see, eg, schematically Fig. 14 ). The substantially horizontal travel differs z. B. by a maximum of ± 5 ° from the horizontal. For the directed movement, a guide device 122, 123, which forces the frame wall 59 onto the actuating path, in particular one between the frame walls 59; 93 effective rolling or sliding bearing guide 122, 123 may be provided. This can, for example, by appropriate storage means 122; 123, z. B. as on one of the frame walls 59; 93 arranged rolling elements 122, for example, rollers 122, and on the other of the frame walls 93; 59 arranged guides 123 and treads 123 may be formed.

In a second embodiment, the frame 53, which supports the bearing device 53 together with the drive device 74, can be mounted on the frame wall 93, which supports the screen printing cylinder 04 directly or indirectly, along a circular arcuate, in particular concentrically to the Siebdruckzylinderachse extending, Stellweges be movably mounted (see, for example, schematically in Fig. 15 ). As a result, when the contact line position is varied, neither a doctor angle nor an adjustment position need be corrected; the doctor orientation with respect to the adjustment to the screen printing form 43 is maintained. The bearing device 53, including the drive device 74 bearing frame wall 59 may be mounted on the screen printing cylinder 04 medium or directly overlapping frame wall 93 pivotally. This can be achieved by pivoting a lever bearing the bearing device 53 (as bearing means 122) about an axis mounted on the frame wall 93 (as a bearing means 123) or as above through a frame wall 59; 93 effective rolling or sliding bearing guide 122, 123 be realized. In contrast to the first embodiment, however, the rolling or sliding elements do not interact with rectilinear surfaces, but with surfaces running concentrically with the circular sieve axis.

In a third embodiment, the frame device 59 carrying the bearing device 53 together with the drive device 74 may be movably mounted on the frame wall 93 which supports the screen printing cylinder 04 along a circular arcuate, in particular concentric to the impression cylinder axis. In this case, the squeegee orientation with respect to the employment of the impression cylinder 06 is maintained, wherein the screen printing plate 43 is deformed in the region of its circumferential line.

The above-mentioned arcuate versions of the travel or the associated guides can also be approximately realized by his against the Innentangente the undisturbed circle at the place of first touch inclined rectilinear travel ranges or guides.

Regardless of the embodiment, a drive device 124 is preferably provided, through which the squeegee 44 or the squeegee holder 43 relative to the round screen 43, in particular, the bearing device 53, including the drive device 74 bearing frame wall 59 relative to the screen printing cylinder 04 medium or directly overlapping frame wall 93, is movable. The contact line varying drive means 124 may in principle be designed as a manually operated drive or alternatively as remotely operated by a drive means 126 to be set drive. In both cases, the drive can be done via a - for example, self-locking - worm gear.

Varying the Berührlinienlage is alone, but also in particular together with one or more of the above solution ideas, such. As the embodiments of the doctor angle adjustment and / or for rectilinear and / or independent on and off, advantage.

In a preferred embodiment of the screen printing stage 02 and / or the screen printing device 86 of the screen-printing cylinder 04 is rotationally by a mechanically independent from the rotary drive of the impression cylinder 06; in particular as a drive motor 116 running drive means 116, for example, an electric motor 116, in particular an electric servo drive 116, ground. The drive takes place here, for example, via a continuous or connected via an axial offset compensating coupling connected shaft 117, z. B. toothed shaft 117, on which preferably in the region of both Siebdruckzylinderstirnseiten a preferably designed as a gear drive wheel 118 rotatably and axially movably received. From this medium or possibly directly via another, preferably designed as a gear 119 idler on a rotatably connected to the rotatable part of the bearing device 112 connected, preferably driven in the manner of a gear 121 or gear rim 121 driven drive 121 driven off.

Particularly advantageous is the execution of the screen printing stage 02 with a screen printing cylinder 04 mechanically independent of the rotary drive of the Impression cylinder 06 driving drive means 116 and an on and off the squeegee 44 causing drive means 74 with one of the rotary drive of the screen printing and the impression cylinder 04; 06 mechanically independent drive means 56 in connection with a machine with at least one further, operating according to another printing process printing stages 09; 09 ', in particular at least additionally one of the print image in direct printing on the substrate B transmitting and / or working in gravure or high-pressure or a digital printing process printing stage 09; 09 'in the printing material path. The screen printing stage 02 and the further printing stage 09; 09 'can thereby be processing stages of an online finishing of upstream, for example by one or more operating according to an offset printing stages 07 or in an advantageous in terms of effectiveness execution as processing stages of a multi-stage processing, in particular finishing machine 01 for offline further processing or refinement be formed by previously printed in the offset printing substrate sheet B.

As printing stage 09 operating according to a high-pressure method, instead of or in addition to a printing stage 09 operating according to flexographic printing, a printing stage 09 operating according to a tampon direct printing method and / or a direct printing stamp method can be provided in the printing material path. Instead of or in addition to an operating in gravure or high-pressure or a digital printing process printing stage 09; 09 'can be provided as a further operating according to a direct digital method printing stage 09 instead of or in addition to a working according to the inkjet or inkjet printing stage a working according to a thermal transfer direct printing process printing stage 09'.

The said direct printing method has in common that they allow the use of specific printing fluid and / or by the type of application, a particularly effective and / or individual processing, in particular finishing, of already printed in sheet form in offset printing substrate B. The achievable Effects relate to, for example, special gloss effects, particularly high resistance and / or a feel different from offset printing. This makes possible a particularly high-quality and effective design of the product surface.

Due to the independent of the impression cylinder 06 rotary drive and the mechanically independent doctor drive the screen printing stage 02 can be actively co-operated independently of the sheet transport, are in standby mode or be completely disabled.

The counter-pressure cylinder 06 of the screen printing stage 02 can in a preferred embodiment by a sheet transport causing, from the drive of the screen printing cylinder 04 mechanically independent drive means 127, z. Example, a drive motor 127, be driven (see, for example, schematically in Fig. 1 and Fig. 2 indicated). In particular, the drive of the impression cylinder 06 of the screen printing stage 02 by the drive motor 127 in a driven by the drive motor 127 drive train, in particular in a Zahnradzug, together with at least one adjacent Bedruckstoffweg in the cylinder 33, in particular a transfer drum 33. The drive coupling between impression cylinder 06 and transfer drum 33 takes place, for example via intermeshing gears 128; 129 (see eg Fig. 13 and Fig. 9 ). In a preferred embodiment, the drive of the impression cylinder 06 of the screen printing stage 02 is carried out not only together with at least one transfer drum 33, but together with this and with the printing material B by the pressure point with the processing tool 29 promotional cylinder 24, z. B. Transfer cylinder 24 of the other provided in the printing material, the further processing or processing serving pressure 09; 09 '. This is z. B. at least from the gear 128 of the impression cylinder 06 of the screen printing stage 02 to a gear, not shown, of the transfer cylinder 24 of the further printing stage 09; 09 'a gear train of meshing, preferably helical gears running 128; 129 trained.

By the screen printing stage 02 - as stated above - is suitable, printing material sheet B of different format length without color residue on the cylinders 04; 06 to be printed, the machine 01, in particular as a further processing or, in particular, finishing machine, is particularly suitable for high-quality finishing.

Due to the independent rotary drive of the screen printing cylinder 04, depending on the nature and extent of finishing a further processing using screen printing or further processing without screen printing, z. B. only by high pressure to be applied lacquer and / or by - preferably individualizing or changing - impressions in digital printing in a simple manner without complex mechanics or conversions possible. In the case of trained as a low-pressure or high-pressure 09 further printing stage 09 can also be the imaging cylinder 29, z. B. forme cylinder 29, be driven by a further drive motor mechanically independent of the transfer cylinder 24 of the respective printing stage 09 or by the transfer cylinder 24 driving drive train. In this case, a screen printing is then possible regardless of the activation of the further printing stage 09. In the case of the particular direct digital printing, z. As inkjet or inkjet printing, its independence is given in any case.

In the embodiment as a pure finishing or finishing machine 01 is the Bedruckstufen 02; 09; 09 'preferably a above, the substrate surface cleaning conditioner 08 provided z. B. is designed as a cleaning stage 08 and / or comprises a suction agent and / or a blowing agent and / or a mechanical stripping. The conditioning stage 08 differs in particular from the printing stages 02; 09; 09 'in that it does not carry pressurized fluid and / or without a pressurized fluid reservoir or pressurized fluid supply device.

LIST OF REFERENCE NUMBERS

01

Machine, finishing machine, finishing machine

02

Processing stage, printing stage, printing unit, rotary printing unit, screen printing unit, screen-printing coating unit

03

bruise

04

Printing cylinder, forme cylinder, screen printing cylinder, processing tool

05

-

06

Printing cylinder, impression cylinder, conveyor, rotating body, cylinder, drum

07

Processing level, printing stage, printing unit, offset printing stage, offset printing unit

08

Processing stage, conditioning stage, cleaning stage

09

Processing level, printing stage, printing unit, coating unit, flexographic printing stage, flexographic printing unit, flexo coating unit

09 '

Processing level, printing stage, printing unit, inkjet printing stage

10

-

11

Processing stage, conditioning stage

12

Opening, inspection and / or maintenance hatch

13

Substrate feeder, substrate, feeder

14

Substrate delivery device, delivery, product delivery

15

-

16

Transport route, delivery extension

17

Processing stage, conditioning stage, radiation dryer, dryer, UV dryer

18

Device for quality control

19

Plant, sheetfed, alignment device

20

-

21

conveyor line

22

Arc accelerator, swinging grapple

23

Conveyor, transfer drum, feed drum

24

Conveyor, rotating body, cylinder, transfer cylinder, drum

25

-

26

Conveyor, rotating body, cylinder, drum

27

-

28

-

29

Machining tool, cylinder, printing cylinder, forme cylinder

30

-

31

Machining tool, cleaning tool, calender roll

32

Holding means, holding device, gripper system

33

Conveyor, rotating body, cylinder, transfer drum

34

Holding means, holding device, gripper system

35

-

36

Conveyor, rotating body, cylinder, drum

37

Machining tool, radiation source, IR radiation source

38

Conveyor system, chain conveyor system

39

Traction means, chain

40

-

41

Drive and / or guide wheel

42

Pressure fluid applicator, inking unit

43

Printing form, round screen, screen printing form

44

doctor

45

-

46

grab

47

Recess, pit

48

Cylinder barrel section, saddle, saddle

49

Dyeing aid, flap

50

-

51

doctor device

52

squeegee blade

53

Storage facility

54

Doctor carrier, traverse

55

-

56

Drive means, electric motor, servomotor

57

Drive means, motor, electric motor, servomotor

58

A doctor beam

59

Side part, frame wall, bearing plate

60

-

61

Frame, subframe

62

signal connection

63

signal connection

64

control device

65

-

66

control means

67

control means

68

Bearing means, lever arm

69

lever

70

-

71

Drive device, drive, motor spindle drive

72

Point of attack, fulcrum

73

Point of attack, fulcrum

74

Drive device, drive, spindle drive, ball screw drive

75

-

76

Phase position sensor, master axis encoder, sensors, master axis

77

Planning and / or management level

78

pressure range

79

pressure strips

80

-

81

Storage equipment, sledges

82

Bearing means, guide, linear guide

83

Frame, frame part, printing unit frame

84

frame wall

85

-

86

Screener

87

Drive means, fluid-operated actuator, cylinder-piston system

88

driving means

89

Bearing means, bolt, axle, stub axle

90

-

91

Bearing means, bolts, stub axle

92

Sidewall (61)

93

Frame wall, frame plate

94

Cross brace, axle, shaft, synchronous shaft

95

-

96

Cross brace, Traverse

97

Cross brace, axial guide

98

attack Punk

99

attack Punk

100

-

101

Transmission and / or transmission element

102

wing

103

wing

104

lever arm

105

-

106

Positioning drive, spindle drive

107

positioning device

108

Stop element, stop

109

stop device

110

-

111

Stop element, stop

112

Storage facility

113

Supporting element, side wall

114

Means for locking, clamping device

115

-

116

Drive means, drive motor, electric motor, servo drive

117

Shaft, gear shaft

118

Drive wheel, gear

119

Intermediate gear

120

-

121

Drive wheel, gear, ring gear

122

Bearing means, roll

123

Bearing means, guide, tread

124

driving means

125

-

126

drive means

127

Drive means, drive motor

128

gear

129

gear

a

Wheelbase

a _s

distance

a _AB

distance

a _AN

distance

a ' _AN

distance

"FROM"

Storage position (44, 52)

"AT"

Anstelllage (44, 52)

B

Substrate, substrate, substrate sheet

B '

Substrate, substrate, substrate sheet, processed

BZ _AB

Operating state (44, 52)

BZ

Operating state (44, 52)

BZ _AN

Operating state (44, 52)

BZ ' _AN

Operating state (44, 52)

e

level

F

Pressurized fluid (paint or varnish)

F.1

Substrate format, format, first

F.2

Substrate format, format, second

G

Straight ("inner tangent")

I _B

information

L1

Touch Line (43, 44)

L2

Touch line (06, 43)

L _A

Position, pressure-off position (04; 43)

L _D

Position, pressure-on-position (04; 43)

L _R

Position, maintenance and / or set-up position, cleaning position (04; 43)

L _Z

cycle length

L _B1

Bedruckstoffläge

L _B2

Bedruckstoffläge

P

contact point

P _ON

Phase, starting phase

P _AB

Phase, shutdown phase

R43

Rundsiebrotationsachse

S1

swivel axis

S2

swivel axis

T

tangent

U _D

Peripheral section (can be used for printing)

U _N

Peripheral section (disturbed or not usable for printing)

Z ₁

cycle

Z ₂

cycle

α

Angle, squeegee angle

Φ _M

Machine and / or printing material phase position

Claims (22)

1. A printing unit (02) of a printing press printing a sheet printing material (B) at at least one printing point (03) according to a screen printing process having a form cylinder (04) configured as a screen printing cylinder (04), having a counter-pressure cylinder (06) forming an abutment to the screen printing cylinder (04) and having a squeegee device (51), comprising

   - a screen printing form (43) configured as a circular screen (43),

   - a squeegee (44) which is put in a thrown-on position ("AN") by forming an acute squeegee angle (α) moving toward the screen printing form (43) with a squeegee edge,

   - a bearing device (53) facilitating a throwing-on and throwing-off movement between the thrown-on position ("AN") of the squeegee (44) and a thrown-off position ("AB"),

   - a drive device (74) by means of which the squeegee (44) in its relative position vis-à-vis the screen printing form (43) can be brought into at least one thrown-on position (AN) and into at least one thrown-off position (AB)
   characterized in that

   - a drive means (56) included by the drive device (74), by means of which the throwing-on and throwing-off movement of the squeegee (44) can be brought about mechanically independently of a rotational drive of the screen-printing form (43) and of a conveying means (06) which conveys the printing material (B)

   wherein the drive means (56) bringing about the throwing-on and throwing off-movement of the squeegee (44) can be moved reproducibly via a control device (64) which controls the drive means (56) in at least one operating state (BZ_AB) which brings about a thrown-off position ("AB") and at least two further operating states (BZ; BZ_AN; BZ'_AN) which are defined differently from one another and the taking up of which results in each case in a thrown-on position ("AN"; "AN"") with radial relative positions and/or throwing-on forces which are different from one another between the squeegee (44) and the screen-printing form (43), and wherein the bearing device (53) comprises bearing means (81, 82) through which at least within one adjusting range comprising a thrown-on position ("AN") and a thrown-off position ("AB") a guided adjustment of the squeegee (44) occurs in a straight line and/or along a direction lying within a squeegee blade plane.
2. The printing unit according to claim 1, characterized in that the control device (64) controlling the drive means (56) of the drive device (74) which throws the squeegee (44) on and off is in signal connection with an information supplying phase position sensor (76) representing the machine and/or printing material phase position (Φ_M) and/or the squeegee (44) can be brought into the thrown-on position (AN) and the thrown-off position (AB) by means of the drive device (74) correlated to a machine and/or printing material phase position (Φ_M).
3. The printing unit according to claim 1 or 2, characterized in that the bearing device (53) bearing the squeegee (44) is designed to vary the travel of the throwing on and throwing off and the end position relating to the thrown-on position via the controller of the drive means (56) or a drive of an adjustable stop means.
4. The printing unit according to claim 1, 2 or 3, characterized by the formation of the bearing device (53) and the arrangement of the squeegee (44) on the same, so that the squeegee (44) in forming an acute squeegee angle (α) can be thrown against the screen printing form (43) into a thrown-on position ("AN") and/or by the design of the bearing means (81, 82) such that at least within an adjusting range comprising a thrown-on position ("AN") and a thrown-off position ("AB") a guided adjustment of the squeegee (44) occurs in a straight line and along a direction lying within a squeegee blade plane and by the acute squeegee angle (α) inclined against the inner tangent (g).
5. The printing unit according to claim 1, 2, 3 or 4, characterized in that the bearing device (53) comprises bearing means (81, 82), by which the adjustment of the squeegee (44) along a direction of a longitudinal extension of a squeegee blade (52) comprised by the squeegee (44) present in an unloaded state of contact, i.e. in the state of the first contact of the screen printing form (43) without additionally impressed squeegee pressure and running perpendicular to the squeegee edge occurs in a straight line and that the bearing means (81, 82) comprise a linear guide (82) and a slide (81) guided in or on the linear guide (82), which is directly or indirectly connected to the squeegee (44) being thrown on and off.
6. The printing unit according to claim 1, 2, 3, 4 or 5, characterized in that by means of the drive means (56) within an adjusting range that corresponds to an adjustment of the squeegee edge in at least a minimum range between an operating state (BZ_AB) representing a thrown-off position "AB" and an operating state (BZ_AN ; BZ'_AN) representing a thrown-on position "AN" spaced apart from it, a continuous adjustment to states in between can be brought about.
7. The printing unit according to claim 1, 2, 3, 4, 5 or 6, characterized in that the drive device (74) is designed as a linear drive (74) and/or as a spindle drive (74) and/or as a ball thread drive (74).
8. The printing unit according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the drive means (56) is formed by an electric motor (56) and preferably designed as a position controllable electric motor (56) or as a stepping motor or as a servo drive (56) or as a control circuit with external position sensors forming a reproducible positional intake.
9. The printing unit according to claim 1, 2, 3, 4, 5, 6, or 7, characterized in that the drive means (56) is formed by a cylinder-piston system to which pressure medium can be supplied, and that the drive device (74) comprises a remote controlled and/or a continuously positionable stop means in one of the at least three operating states (BZ; BZ_AB; BZ_AN; BZ'_AN) comprising the adjustment range, against which the drive means (56) for taking up the respective operating state (BZ; BZ_AB; BZ_AN; BZ'_AN).
10. The printing unit according to claim 1, 2, 3, 4, 5, 6, or 7, characterized in that the drive device (74) and/or the drive means (56) can be controlled with respect to a force active at the output side, and that the drive means (56) is formed by a cylinder-piston system to which pressure medium can be supplied or by an electric motor that can be controlled with respect to moment applied at the output side.
11. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that in the region of both faces a bearing device (53) directly or indirectly bearing the squeegee (44) is provided with bearing means (81, 82) facilitating the throwing-on and throwing-off movement between the thrown-on position ("AN") of the squeegee (44) and a thrown-off position ("AB") as well as being provided with a drive device (74) having the drive means (56) and engaging on the squeegee carrier (54).
12. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, characterized in that the bearing device (53) has a bearing means (68) on both sides supporting the squeegee (44) or a squeegee carrier (43) carrying the squeegee (44) which can be pivoted around a pivot axis (S1) running parallel to the squeegee edge by a drive device (71) comprising a drive means (57) arranged on a frame (61) and in the case of pivoting brings about a change of a squeegee angle (α) formed between a squeegee blade (52) of the squeegee (44) and the screen printing form (43).
13. The printing unit according to claim 12, characterized in that the pivot axis (S1) of the bearing means (68) coincides with a theoretical line of contact (L1), which is given by a line running in an unloaded state of contact of the squeegee (44), i.e. in the state of the first contact of the screen printing form (43) by the squeegee edge without additionally impressed squeegee pressure and/or that the drive device (74) bringing about the throwing-on and throwing off movement of the squeegee (44) is arranged together with the drive means (56) on the pivotable bearing means (68) and as a result is jointly pivotably mounted with the squeegee (44), so that in the adjustment of the squeegee angle (α) it is forcibly moved along with the squeegee (44) and/or that a lever arm (68) of a one or multiple arm lever (69) is provided as the swiveling bearing means (68) directly or indirectly supporting the squeegee (44), and/or that a drive device (71) comprising a drive means (57) is provided, by means of which the squeegee (44) can be pivoted around the pivot axis (S1).
14. The printing unit according to claim 13, characterized in that the drive device (71) is designed as a linear drive (71) and/or as a spindle drive (71) and/or that the drive means (57) is formed by an electric motor (57) which is preferably designed as a position controllable electric motor (57) or as a stepping motor or as a servo drive (57) or as a control circuit with external position sensors forms a reproducible positional intake.
15. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, characterized in that the drive means (56) bringing about the throwing-on and throwing-off movement is in signal connection with control means (66) of a control device (64) which is designed and equipped to bring about a throwing-on and throwing-off of the squeegee (44) with a sequence run differing to each other during the operation of the printing machine for differing printing material formats and/or printed image lengths and/or that the drive means (56) bringing about the throwing-on and throwing-off movement is in signal connection with a the squeegee (44) depending on a control means (66) of a control device (64) starting and stopping depending on a sequence run changing the printing material format.
16. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15, characterized in that the screen printing form (43) is rotatably mounted on a frame (61) and can be changed in axial distance to the counter-pressure cylinder (06) by a drive device (88) engaging on the frame (61) and/or that the bearing device (53) is arranged directly or indirectly on a frame (61) directly or indirectly bearing the screen printing form (43).
17. The printing unit according to claim 16, characterized in that the frame (61) bearing the screen printing form (43) is pivotably mounted around a pivot axis (S2) that is axis parallel to the counter-pressure cylinder (06), that the drive device (88) bringing about the change in distance by pivoting the frame (61) around the pivot axis (S2) can optionally be brought into an operating state (BZ_D) in which the screen printing form (43) is in a defined print on position (L_D), and into another operating state (BZ_A), in which the screen printing form (43) is in a defined print off state (L_A).
18. The printing unit according to claim 17, characterized in that the drive device (88) can be reproducibly brought into a further defined operating state (BZ_R) in which the frame (61) is pivoted such that the screen printing form (43) is in a maintenance and/or set-up position (L_R) with a greater axial distance (a) between the counter-pressure cylinder (06) and the screen printing form (43) vis-à-vis the print on position (L_D) and the print off position (L_A), and/or that a positioning device (107) comprising a positioning drive (106) for setting and/or for variation of the print on position (L_D) is provided.
19. The printing unit (02) according to claim 17 or 18, characterized in that the screen printing form (43) and the squeegee (44) are directly or indirectly mounted on the same frame (61) and/or in the change of axial direction can be jointly moved between the counter-pressure cylinder (06) and the screen printing form (43) by the drive device (88).
20. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 or 19, characterized in that the screen printing cylinder (04) is rotationally driven by a drive means (116) mechanically independent from the rotational drive of the counter-pressure cylinder (06).
21. A method for operating a squeegee device (51) in a printing unit, according to any of claims 1-20, wherein a throwing on and throwing off of a squeegee (44) on a printing screen form (43) borne by a screen printing cylinder (04) forming an acute squeegee angle (α) occurs via a drive device (74) by means of a drive means (56) provided for this purpose, mechanically independent from the rotational drive of the screen printing cylinder (04) and a counter-pressure cylinder (06) interacting with it, wherein for throwing on the squeegee (44) is guided in a straight line by the drive means (56) bringing about the throwing-on and throwing-off movement of the squeegee (44) via a control device (64) controlling the drive means (56) and/or is brought along a direction lying within a squeegee blade plane from a thrown-off position ("AB") into a thrown-on position ("AN") that can be varied with respect to the intensity of the throwing on.
22. The method according to claim 21, characterized in that phase lengths and/or positions of throwing-on and throwing-off phases (P_AN; P_AB) present in a repeating cycle (Z) are varied depending on information (I_B) relating to the printing material format and/or the print image and/or that the screen printing cylinder (04) is rotationally driven by a drive means (116) mechanically independent from the rotational drive of the counter-pressure cylinder (06).

Images