EP2070699A2 - Device and method for tensioning screens and their use in printing presses as well as screen frame and silk screen printing press - Google Patents

Abstract

The method involves fixing and positioning a screen frame (2) in an accommodating device (1), where position and state of the frame are detected. A filter screen (4a) of the frame is mechanically tensioned, and forces exerted on the screen are detected. The detected forces are stored as force data in a memory device (10), which is attached to the frame. The frame is removed from the accommodating device, and the filter screen is attached at/in the frame by clamping between upper and lower frame parts (21, 22) of the frame. Independent claims are also included for the following: (1) a method for operating a printing screen (2) a device for producing or for operating a printing screen.

Description

The invention relates to a method for the production and operation of printing screens for use in a screen printing machine, in particular in flat screen printing and a device for the production or operation of printing screens. The invention further relates to a screen frame and a screen printing machine.

The single- or multi-color printing of a wide variety of products such as cans, bottles, tubes, CDs or DVDs, electronic articles, garments such as T-shirts or caps or general printing materials by means of screen printing methods have been common for many years. In most cases, screen printing units are used which operate by means of a flat screen. For the production of the flat screen, the screen fabric is mounted on a stable frame under a mechanical bias and fixed on the frame.

In order for the printing screen thus obtained to be used in a printing machine, the image to be printed must be introduced into the screen fabric, thereby forming imaging areas in the screen fabric in which the screen fabric is permeable to printing ink and non-imaging areas in which the screen fabric is impermeable to printing ink is.

For imaging of the screen, therefore, the clamped printing screen is first coated with a photostructurable paint, whereby the printing screen is initially impermeable to printing ink.

In another embodiment, an already coated fabric is mounted on the printing frame. In a subsequent step, the coated fabric is exposed by means of a imaging unit, for example, an exposure unit with the motif to be printed, which is either a polymerization of the exposed coating, depending on the design of a case used on the mesh fabric, whereby it becomes insoluble or a depolymerization of the exposed areas takes place, whereby the paint is soluble at these points. In a subsequent development step, the soluble areas of the photoresist are then removed from the screen, so that the screen is permeable only at the desired locations for printing ink.

In an alternative imaging unit, corresponding lacquers or waxes can also be applied to the screen fabric by means of an inkjet printing method, so that non-image-forming areas which are impervious to ink are thereby formed.

It is therefore necessary to create a separate printing screen for each motif to be printed and each color to be printed and to ensure a smooth printing operation to provide a corresponding number of replacement printing screens, which in particular for a larger number of print motifs consuming storage of printing screens is required.

A disadvantage of the described type of production and use of the printing screens and in particular their storage is that the mechanical tension of the printing screens, as was specified in the covering of the screen frame after their imaging, either by an ink jet printing and / or exposure and development of the screens can be changed.

On the one hand, the mechanical cohesion of the fabric threads may be changed due to the lack of the photoresist in the imaging areas and there may be other mechanical conditions, whereby at least locally different straining stresses may arise. On the other hand, the screen tension can also be locally due to an exposure and development process can be affected differently by the fabric fibers under the influence of light, especially under UV light influence and / or the chemical influence of the developing liquids are influenced in their mechanical properties, so that the actual screen tension more or less deviates from the initially set screen tension. Likewise, the screen tension can change due to a storage of the imaged printing screens.

By changing the wire tension, which may also be different in different areas of a printing screen, however, the print quality of an imprinted image is directly influenced, which may result in quality changes, especially when changing a printing screen due to a sieve, so that each screen change a new setting the optimum, required contact pressure of the doctor blade must be made.

The object of the invention is therefore to eliminate the disadvantages mentioned and to provide a device and a method with which / which a screen frame can be covered with a predetermined mechanical bias, can be imaged and optionally be re-tensioned with a review of the voltage and the Detecting screen errors should be possible.

The object is achieved by a method according to the invention, in which a screen frame, which is provided with a screen fabric or is provided in a subsequent step, is mounted and positioned in a receiving device and its position and position are detected. The screen is then tensioned mechanically and the forces exerted thereby are recorded, wherein at least the detected forces are stored as force data in a storage device attached to the screen frame. Such a sieve frame can then be removed from the device and used.

For example, a screen fabric for producing the printing screen from a supply roll can be stretched on a dedicated screen frame. This covering can be done before insertion into the device according to the invention or afterwards. Thus, for example, a screen frame is first inserted into a receiving device provided for this purpose a fixture, fixed in this and, for example, a certain section of a stocked screen fabric are stretched on the screen frame, for example by the screen mesh between an upper and a lower frame part of the screen frame is clamped, in particular so in a two-part frame, which is divided into two parts with respect to its frame thickness.

The case specified mechanical stress and possibly other geometric reference data are stored on the screen frame in a rewritable suitable memory so that it can be read in a printing machine with suitable means in a screen frame adapted recording device. The receiving device within the printing machine can have clamping devices, whereby the screen frame and the screen fabric clamped in it can be tensioned and thus the mechanical tension of the screen fabric can be adjusted to the predetermined and stored voltage values and / or optionally optionally can be changed.

A screen frame according to the invention, which can be used here, can have several side parts or frame elements which are connected to one another via displaceable connecting elements and have at least one memory in which data can be stored / stored at least via the forces with which a screen mesh in the screen frame is tensioned / tense. By sliding fasteners, the size of the frame can be changed and thus the tension of the screen fabric therein.

The frame parts of the screen frame can according to the invention, for example, each have a corresponding roughened and / or textured, eg toothed surface to the screen fabric, so that the clamped screen fabric can be securely held.

To achieve the displaceability, for example, the corner joints of the frame members according to the invention be designed so that they are mutually displaceable to each other or to each of the Rahmenelemenet that connect them and are fixable to each other by means of additional, suitable clamping elements, so that by means of an externally acting clamping device Frame elements can be moved against each other and thus the mesh can be stretched.

At the same time, the receiving device according to the invention can have at least one fixed reference point and / or contain sensors, whereby the position and the position of the sieve frame can be determined. For this purpose, the screen frame according to the invention also, for example, at least one reference point, so that for example by means of said sensors, the distances between the reference points of the receiving device and the screen frame and thereby the actual position and position of the screen frame and the clamping device can be detected and forwarded to a higher-level control can be, whereby a clear and repeatable and / or customized positioning of the printed image in the screen frame can be made possible.

It can also be provided according to the invention that the clamping device has further sensors for determining the wire tension and their detected data can be forwarded to a higher-level control, whereby it is possible to set a desired wire tension. It may be expedient to fix a screen frame prestressed to a certain wire tension by means of clamping elements attached to the screen frame, so that no change in the wire tension, in particular no unacceptable relaxation of the screen fabric and the screen frame, can take place even after removal of the screen frame from the receiving device.

It can furthermore be provided according to the invention that the detected position data and / or position data of the screen frame and / or the ascertained screen tension data are determined in particular by means of a suitable writing device are stored, for example, stored in a mounted on the screen frame storage device and thus remain on the respective screen frame.

In this way it is possible according to the invention to impress a respective individual data set on each screen frame and thus each printing screen before and / or after a respective imaging of the screen fabric which according to the invention, for example, in a correspondingly designed recording device for the printing screen or screen frame with screen mesh in a printing machine, e.g. can be read by a suitable reading device and thus, for example, an alignment and / or a retightening of the screen fabric can be done, for. in that the stored data is compared with the current data and in case of deviations a new adjustment is made to the stored values.

It can also be provided according to the invention that in a subsequent step on the clamped and provided with a mechanical bias mesh screen the artwork can be transferred by, for example, an uncoated screen fabric is provided with a structurable coating, for example with a photoresist. The application can be carried out by means of a spraying device or a coating process or a dipping process.

Any subsequent drying or fixing of the photoresist hardens the coating at least to the extent that imaging in a subsequent step can be carried out without problems, for example optically by means of photomasks or laser exposure. Depending on the used positive or negative-working photoresist either the non-imaging areas are insolubilized during the exposure, or the imaging areas completely or at least partially depolymerized. For this purpose, for example, when using a UV-sensitive photoresist by means of a UV light source via a print template those areas of the screen are irradiated with UV light, which are required for the printing. Depending on the lacquer used, these may be either the imaging areas or the non-imaging areas. A subsequent development fixes the photoresist and / or removes the photoresist at the imaging sites so that they become transparent to an ink.

It is also possible to use an already precoated screen fabric instead of an uncoated screen fabric, so that the said coating is unnecessary.

The printing screen thus created is ready for use in an associated printing unit of a corresponding printing press and can be removed from the receiving device.

An optionally occurring mechanical relaxation of the printing screen can be provided and, for example, at least partially be limited by the fact that the mechanical design of the screen frame is chosen so that on the one hand a mechanical tensioning of the screen fabric clamped in the screen frame can be done by means of an external clamping device and / or on the other hand, a relaxation of the clamped screen can be kept low by a corresponding design of the screen frame.

Alternatively, imaging can also take place, for example, by means of an inkjet printing method by applying a corresponding printing ink exclusively to the non-imaging areas on the uncoated screen and fixing it, whereas the imaging areas remain free. A subsequent optionally required curing of the printing ink permanently fixes the printing ink on the screen fabric and enables operation in a screen printing machine.

According to the invention, a printing screen produced in this way and provided with individual data (screen frame with screen cloth) can subsequently be placed in a receiving device of a printing machine provided for this purpose, wherein the receiving device can have additional devices for fixing the printing screen. According to the invention, the receiving device may further comprise a device for reading out in the storage device of the sieve frame have stored data, the read-out data can be transmitted for further processing, for example, in a higher-level control of the printing press.

Thus, it can be provided by the method according to the invention that a screen frame which is provided with a screen fabric is mounted in a receiving device, are read from a arranged on the screen frame memory at least force data representing the forces with which the screen fabric originally stretched in the screen frame was positioned, the sieve frame is positioned and currently the screen mesh in the screen frame exciting forces are detected.

In the case of a deviation of the actual measured forces from the original forces, in particular in case of deviation beyond a tolerance, the screen mesh can be re-tensioned.

By means of adjustment units and / or positioning units according to the invention for the printing screen and / or the recording device, it is thus possible to evaluate the transmitted data, for example the screen frame and / or the recording device on the basis of fixed reference points and, for example, in the printing machine Screen printing frame stored position and position data to position the screen frame and thus the artwork in a desired position and orientation.

It is also possible according to the invention to measure the initial and the instantaneous wire tension of the screen fabric by means of appropriate tensile force and / or pressure units exerting force on the side elements of the screen printing frame and corresponding force sensors incorporated into the respective directions of force of the tension or compression units to set as desired, for example, on a screen tension value stored in the storage device of the screen frame and used during the imaging of the printing screen.

It is thus also possible in accordance with the invention to readjust the screen tension to a desired value in order to compensate, for example, a decrease in the screen tension due to the mechanical load during a continuous printing operation, so that a desired screen tension can always be maintained.

According to the invention, the receiving device for the printing screen (screen frame with screen cloth) in the printing machine at least substantially the receiving device for the printing screen in the manufacturing device, wherein also devices for clamping the screen frame clamped in the screen frame are present, and devices for aligning the screen frame relative to machine-related reference points.

According to the invention, the data stored in the screen frame or its memory with respect to the screen tension set during production and the corresponding reference positions can be read out for this purpose. By means of a higher-level control, the wire tension is subsequently generated via the tensioning devices and the positioning of the printing screen is carried out. For this purpose, corresponding sensor devices for measuring the mechanical screen tension and for measuring the position of the screen frame can be provided, whereby it is also possible to selectively or automatically, for example, to vary the screen tension or to keep it constant.

According to the invention, it can also be possible by means of the sensor voltage detectable via the sensors with a corresponding design of the sensors and a corresponding processing of the measurement data thus determined to detect a sieve early, for example by a certain number of force sensors in pairs and symmetrically, in particular opposite so um The screen frame are arranged so that compensate for their measured values in pairs in normal operation. The asymmetry of the measured values which already occurs at the beginning of a sieve burst can then be evaluated as an indicator for a sieve break.

An embodiment of the invention is shown in the following figures.

Show it:

FIG. 1

a schematic representation of an imaging unit according to the invention

FIG. 2a

a detailed view of a screen frame according to the invention in a first, open position

FIG. 2b

a detailed view of a screen frame according to the invention in a second, closed position

FIG. 3

a schematic representation of a receiving device according to the invention for screen frame with read / write devices

A schematic representation of a device according to the invention for the production and imaging of screen printing frame shows FIG. 1 , The device in this case has a receiving device 1 for receiving a screen frame 2, wherein the screen frame 2, for example, consists of an upper part 21 and a lower part 22, which can interlock, for example, via dowel pins 23 and fitting holes 24.

To produce a printing screen, according to the invention, for example, in a first step, a specific section 4b of the screen fabric 4a, e.g. from a Siebgewebevorratsrolle 4 via guiding devices 5 in the direction 101, for example by means of a transport device not shown so between the upper part 21 and the lower part 22 of the screen frame 2 laid that at a successful in a second step joining the two parts 21 and 22 along the screen fabric the border of the screen frame can be firmly clamped.

In addition, a fixation of the frame members 21, 22 can be provided to each other in the assembled state, for example by means not shown clamps or screwing.
An example provided cutting device 6 then separates the screen fabric 4a between screen frame 2 and supply roll 4, so that only a certain portion 4b of the screen fabric 4a comes to rest in the frame 2.

By means of pulling devices 3 a, 3 d acting on the respective sides of the holding frame 1 in the respective directions 100 a, 100 d, the screen fabric 4 b clamped and fixed in the screen frame 2 can be prestressed to a desired mechanical tension in a third step, so that the screen frame is prepared for coating and / or imaging. The imaging of the screen fabric 4b clamped in this way can be effected, for example, in a subsequent fourth step by initially applying a corresponding coating which can be patterned by optical means to the screen fabric 4b by means of a coating device 8a such that a closed surface can be produced, for example.

In a fifth step, for example, an optically operating imaging unit 8b transfers a printing original into the previously applied coating, for example by means of which it hardens at the exposed areas and thus becomes insoluble. When using a reverse-acting coating, the coating applied in said fourth step is then immediately cured by means of a device, not shown, and subsequently imaged in said fifth step. The imaging takes place in this case in that the cured coating is removed at the ink-transferring areas, for example by means of laser radiation, so that these areas of the printing screen for a printing ink are permeable.

In a subsequent sixth step, the printing screen thus imaged can be removed from unwanted residues of the coating, for example by means of a developing device and / or washing device 8c, so that the printing screen can subsequently be used in a printing press. At the same time or immediately before removal of the printing screen 2 from the receiving device 1, it is provided according to the invention that the forces exerted on the respective sides of the screen frame and thus the respective screen voltages are detected by means of sensors 7 and by means of a writing device 11 mounted in a screen frame Memory 10 are transmitted.

It can furthermore be provided according to the invention that position data and position data of the printing screen 2 determined at the same time via corresponding sensors are transmitted to the memory 10 via the writing device 11 relative to stationary reference points. The memory 10 may be a magnetically or optically operating memory or else a nonvolatile semiconductor memory in which, for example, via corresponding electrical connections or by means of a magnetic, optical or RFID read / write method, the data can be transmitted and / or deleted and / or or stored data can be read out.

To support the holding action on the screen fabric 4b in the screen frame 2 and to support the positioning of the two parts 21 and 22 to each other in the assembled state, it can according to the invention as in Figure 2a and 2b shown schematically, the respective the Siebgewebe 4b facing edges 21 c, 22 c of the frame members 21 a, 22 a, 21 b, 22 b of the upper part 21 and the lower part 22 perform structured, for example by in the opposing surfaces 21 c, 22 c, 21d, 22d mutually complementary shapes such as pyramids, tooth-like structures, or needle-like pins or their receiving holes are provided.

In this way, on the one hand, the screen cloth 4b can be effectively held in the assembled state of the frame parts 21, 22 between them and, on the other hand, the position of the two frame parts 21 and 22 can be unambiguously determined.

It can further be inventively provided that the frame members 21 a, 21 b and the frame members 22a, 22b are connected to each other at their respective end faces via a connecting element 21e or 22e, in particular a corner connecting element that the frame elements 21 a, 21 b and 22a, 22b to each other in the directions 201, 202 are displaceable.

For this purpose, the frame members 21 a, 21 b and 22 a, 22 b may be made hollow, for example, at least at their respective end faces. The Connecting elements 21 e, 22 e have, for example, a rectangular corner element 21 f, on each of which at right angles to each other two arms 21 g, 21 h and 22 g, 22 h are mounted, which in the respective hollow ends of the frame members 21 a, 21 b and 2a, Engage 22b and are mounted in these slidably along the respective axis of the respective frame member. This makes it possible to change the size of the frame within certain limits and / or tension between the lower and the upper frame 21, 22 clamped pressure screen with external means. The corner elements 21e, 22e can have additional connecting elements such as, for example, dowel pins 23 and corresponding fitting bores 24, which engage with one another when the upper frame part 21 is joined to the lower frame part 22.

It can be inventively further provided that the frame parts 21 and 22 can be connected to each other via fixing elements, not shown.

FIG. 3 shows schematically an embodiment according to the invention of a device for receiving and tensioning a covered with a mesh screen, as it can be used for example in a printing press. For this purpose, the screen frame 2 is inserted into a holding device 1 provided for this purpose, that its respective sides 2a, 2b, 2c, 2d with the respective receiving devices 1a.1, 1a.2, 1a.3, ..., 1b.1, 1b .2, 1b.3, ..., 1c.1, 1c.2, 1c.3, ..., 1d.1, 1d.2, 1d.3, ..., pages 1 a, 1 b, 1 c, 1 d of the holding device 1 can be firmly connected by means not shown fixing. The printing screen 2 is already prepared for use in a printing process and has a screen fabric 4b imaged with a printed image 40.

To set a required for an optimal work process and thus for an optimal printing result screen tension, which also essentially corresponds to the wire tension in the production of the printing screen, it is provided according to the invention in a first step, the stored in the memory device 10 of the printing screen 2 data such as screen tension data and / or to read out position data by means of a suitable reading device 11 and to transfer it to a higher-level control (not shown). Based on this Dataset, it is in a second step according to the invention possible to align the screen frame 2 in its receiving device 1, for example, against fixed reference points, so as to align, for example, the inscribed in the screen mesh 4b artwork 40 to a substrate.

Furthermore, it is possible according to the invention, the screen fabric on the side elements 2 a, 2 b, 2 c, 2 d of the screen frame 2 by means of the side elements 1 a, 1 b, 1 c, 1 d of the receiving device 1 to tension. For this purpose, according to the invention, the side elements 1 a, 1 b, 1 c, 1 d of the receiving device 1, for example, in each case in several sections / segments 1a.1, 1 a.2, 1 a.3, ..., 1b.1, 1 b. 2, 1 b.3, ..., 1c.1, 1 c.2, 1c.3, ..., 1d.1, 1d.2, 1d.3, ..., each of which is independent have controllable train and / or printing device 3a, 3b, 3c, 3d, whereby it is possible with a corresponding control of the devices 3a, 3b, 3c, 3d, on the one hand the screen frame 2, for example, for positioning along the directions 100a, 100b, 100c 100d and to move the respective side parts 2a, 2c and 2b, 2d against each other along the respective directions 100a, 100c and 100b, 100d.

By further provided according to the invention subdivision of the respective sides 1 a, 1 b, 1 c, 1 d of the receiving device 1 in several sections / segments 1 a.1, 1 a.2, 1 a.3, ..., 1b.1, 1 b.2, 1 b.3, ..., 1c.1, 1 c.2, 1c.3, ..., 1d.1, 1d.2, 1d.3, ..., it is still it is possible, depending on the requirement, to stretch the screen cloth 4b at least zone by zone, for example by different segments 1a.1 and 1c.1, 1a.2 and 1c.2, etc, on the area of the screen cloth 4b clamped between them Exercise forces, so that, for example, a zone-wise decrease in a desired wire tension due to the mechanical stress occurring during operation can be compensated.

For this purpose, it may furthermore be provided according to the invention that each of the sections / segments 1a.1, 1a.2, 1a.3, ..., 1b.1, 1b.2, 1b.3,..., 1c.1, 1c.2, 1c.3, ..., 1d.1, 1d.2, 1d.3, ..., each having sensor means 7 for measuring the respective tensile stresses or for measuring the respective forces occurring. The Dalen recorded in this way can be detected, for example, by means of a superordinate control (not shown), which after a corresponding desired processing, the respective pulling devices 3a, 3b, 3c, 3d of the segments 1a.1, 1a.2, 1a.3, ..., 1b. 1, 1b.2, 1b.3, ..., 1c.1, 1c.2, 1c.3, ..., 1d.1, 1d.2, 1d.3, ..., drives.

It may be expedient here, according to the described device according to FIG. 3 to use substantially the same device in the manufacture of the printing screen 2, so that, for example, the tensile stresses and / or position data used in the manufacture of the printing screen 2 can be easily reproduced in the printing press by these data are detected during manufacture in a similar manner and in the storage device 10 are written and then read in the printing press and processed.

The device for producing the printing screen can thus have the same sensors and actuators as the device for receiving the printing screen in a printing press.

With regard to all embodiments, it should be noted that the technical features mentioned in connection with one embodiment can be used not only in the specific embodiment, but also in the other embodiments. All disclosed technical features of this invention description are to be classified as essential to the invention and arbitrarily combined or used alone.

Claims (20)

Method for producing printing screens for use in a screen printing machine, characterized by the following steps: a. a screen frame (2) provided with a screen cloth (4a) or provided in a following step is fixed and positioned in a pickup device (1), in particular, its position and posture being detected; b. the screen fabric (4a) is tensioned mechanically and the forces exerted in this case are detected; c. at least the detected forces are stored as force data in a storage device (10) attached to the screen frame; d. the sieve frame (2) is removed from the receiving device (1). A method according to claim 1, characterized in that a screen fabric (4a) is removed from a supply roll (4) and is fixed to / in the screen frame (2), in particular by clamping between a lower (22) and an upper (21) frame part of the Screen frame (2). Method for operating printing screens in a screen printing machine, characterized by the following steps: a. a sieve frame (2) provided with a sieve cloth (4a) is mounted in a receiving device (1), b. from a memory (10) arranged on the screen frame (2), at least force data are read out which represent the forces with which the screen mesh (4a) in the screen frame (2) was originally tensioned; c. the sieve frame (2) is positioned and the forces currently exciting the sieve cloth (4a) in the sieve frame (2) are detected; d. in the case of a deviation of the actual measured forces from the original forces, in particular in case of deviation beyond a tolerance, the screen mesh (4a) is re-tensioned. Method according to one of the preceding claims, characterized in that the memory (10) on the screen frame (2) is magnetically or optically or by means of radio signals with a writing and / or reading device (11) on the receiving device (1) described or deleted or read , Method according to one of the preceding claims, characterized in that the tensile forces by means of several independently controllable traction devices (3a, 3b, 3c, ....) in sections on the frame members (2a, 2b, 2c, 2d) of the screen frame (2) be and / or by means of several independent sensors (7) sections of the frame elements (2a, 2b, 2c, 2d) are detected. Method according to one of the preceding claims, characterized in that with the receiving device (1) of the screen frame (2) arranged and opposing sensors (7), the tensile forces are absorbed on the screen fabric (4a) and from an imbalance of forces on a screen error, in particular a sieve is closed. Method according to one of the preceding claims, characterized in that in the memory (10) stored data for positioning and / or position of the screen frame (2) or printing screen (2, 4a)) for operation of the printing screen read in a printing machine, evaluated and the Screen frame (2) / the printing screen (2, 4a) is set to the stored values. Method according to one of the preceding claims, characterized in that an imaging of the printing screen by optical means by means of an exposure unit or a laser exposure device or by means of an ink jet process takes place. Apparatus for producing or operating printing screens, characterized in that it has a receiving device (1) with which a screen frame (2) inserted into this receiving device (1) can be positioned, the position and position can be detected and a in / on the screen frame ( 2) fixed screen fabric (4a) is mechanically tensioned and wherein the with the receiving device (1) for tensioning the screen fabric (4a) exercised Force can be detected and the receiving device (1) a writing device (11) and / or reading device (11), wherein between the writing and / or reading device (11) and a screen frame (2) attached memory (10) the position data and / or position data and / or the detected force data are at least unidirectionally interchangeable. Apparatus according to claim 9, characterized in that the receiving device (1) on each of its sides in at least two independent and each at least along one direction movable segments (1a1, 1a2, ..., 1b1, 1b2, ... 1c1, 1c2 , .... 1d1, 1d2, ....) are divided. Apparatus according to claim 10, characterized in that the segments (1a1, 1a2, ..., 1b1, 1b2, ... 1c1, 1c2, .... 1d1, 1d2, ....) each independently controllable traction devices ( 3a, 3b, 3c, ....) and / or each have independent sensor devices (7) for determining the respective tensile force or the respective wire tension. Device according to one of the preceding claims 9 to 11, characterized in that with the writing and / or reading device (11) of the memory (10) of a screen frame (2) magnetically or optically or by radio writable and / or erasable and / or readable is. Device according to one of the preceding claims 9 to 12, characterized in that with the receiving device (1) from the memory (10) of a screen frame (2) read data for positioning the printing screen (2, 4a) and for adjusting a screen tension on the screen frame (2) are adjustable. Device according to one of the preceding claims 9 to 13, characterized in that the receiving device (1) means for coating (8a) and / or imaging (8b) and / or development (8c) of a sieve frame (2) clamped screen fabric (4a ) having. Device according to one of the preceding claims 9 to 14, characterized in that the device is a screen printing machine. Sieve frame characterized in that it comprises a plurality of side parts (2a, 2b, 2c, 2d), which are connected via slidable connecting elements 21 e, 22e) to each other and at least one memory (10) in which data stored at least over the forces / can be stored , with which a screen fabric (4a) in the screen frame (2) is tensioned / stretched. Screen frame according to claim 16, characterized in that the side parts (2a, 2b, 2c, 2d) are fixable to each other. Screen frame according to one of the preceding claims 16 or 17, characterized in that it comprises an upper (21) and a lower frame part (22), between which a screen mesh (4a) can be fastened. Screen frame according to one of the preceding Claims 16 to 18, characterized in that the sides of the upper (21) and lower frame part (22) facing a printing screen (4a) each have a surface (21d, 22d) which is complementary to one another. Screen printing machine with a receiving device for printing screen frames, characterized in that the receiving device (1) a reading unit (11) for reading in a memory (10) on the screen frame (2) stored data and means for positioning the screen frame (2) and for mechanical clamping of the screen fabric (4a) in the screen frame (2), in particular in dependence on data read.

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