DE2402282A1 - SCREEN PRINTING MACHINE - Google Patents

Description

DiPL-ING. KLAUS NEUBECKER

Patent attorney 2 A 02282

4 Düsseldorf 1 Schadowplatz 9

Düsseldorf, Jan. 17, 1974

Morrison 3.0-001
73192

Morrison Machine Company

Faterson, New Jersey 07509, V. St. A.

Screen printing machine

The present invention relates to rotary screen printing machines and in particular to devices for such machines in order to adjust the pressure of the application device or the application device to position.

Rotary screen printing machines are well known and include
typically a frame, a counter-bearing device supported on the frame and at least one (but usually several) rotatable screen arrangement which is adjustably fastened to the frame with respect to the counter-bearing device. Typically, each rotatable screen assembly includes an elongated inner one
Body, an outer, patterned hollow screen that
is rotatably mounted about the inner elongated supporting body, and an elongated applicator such as a
conventional doctor blade, which is supported on the elongate supporting body and engages the inner surface of the screen to the
Pressing ink through the mesh of the screen, if
the fabric to be printed is passed between the corresponding hollow screen body and the counter-bearing device. at
rotating screen printing machine has the counter bearing device
a large roller, about the circumference of which the majority are rotatable
Sieve arrangements are distributed supported. For flatbed screen printing

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Telephone (O211) 32O8 58 Telegrams Custopat

machines, it is common to have the rotating screen assemblies in one to arrange common level, each screen assembly equipped with an associated, cooperating counter bearing roller is.

Since the pressure of the applicator (i.e., the squeegee) is so significant When determining the print quality, various methods have been proposed according to the prior art in order to be able to adjust the doctor blade in relation to the inner surface of the screen. For example, U.S. Pat. No. 2,928,340 and 3,186,339 describe the use of fluid operated pistons, which are connected to the squeegee to be adjusted thereby. Further solutions according to U.S. Patents 2,292,602, 2,571,064 and 3 229 624 use springs to bias the doctor blade relative to the inner surface of the screen.

More recently it has been proposed to use an elongated inflatable tube to reduce the pressure of the doctor blade against the Adjust the inner surface of the screen. The corresponding prior art device is an inflatable tube according to the length of the printing screen supported on the inner support shaft of the rotatable screen assembly and behind the doctor body arranged. By determining the extent to which the tube has been inflated, the amount of squeegee pressure against the inner surface can be determined of the sieve can be varied.

It is also desirable to provide an adjustment mechanism to vary the angle at which the doctor blade engages the inner surface of the screen. In the case of screen printing machines according to the state of the Technique, however, such an adjustment can only be made by removing the hollow screen, thus removing the squeegee and the mechanism to expose their angular position to change. In addition, the adjustment mechanisms of the machines according to the prior art are quite intricate. Likewise, prior art machines with adjustment mechanisms are provided has been to adjust the position of the screen of each rotatable screen assembly in relation to its associated abutment device

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vary. However, the various processes implemented in the machines according to the state of the art are quite complex, and no simply structured mechanism has been developed so far, to ensure all desired degrees of movement of the sieve can.

As for the inventive aspect of setting the squeegee pressure is concerned, it is provided in connection with this according to the invention that the rotatable inside the hollow screen of the individual Sieve arrangements arranged Druckeinste11 device a plurality has individually inflatable elongate tubes which are arranged behind the applicator. On this simple one Selected areas of the application device can be acted upon with selected pressure values. It goes without saying that The number and length of such sections correspond to the number and length of the inflatable tubes used.

It should be noted that this system of selective pressurization different areas along the longitudinal extension of the doctor blade have proven to be particularly advantageous for printing machines that are particularly wide. That is, it has been shown that the wider the machine and the longer the rotating screen assembly are, the more the sieve tends to be near the center of to bend away its associated counter-bearing device. This is due to the fact that the rotatable screen assembly in proportion mounted to the frame at their opposite ends and even with a relatively long rotatable screen assembly no fixed bearing is provided in the central area. The fact that, according to the invention, the inflatable located in the center Tube or the inflatable tubes located there can be inflated with a greater pressure than that in the vicinity of the ends The inflatable tubes arranged on the squeegee can be used to compensate for the increased pressure in the center area of the squeegee naturally adjusting bending effect can be provided. ·

As for the aspect of the invention regarding the choice of angle concerns, under which the squeegee on the inner surface of the corresponding

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Attacks sieves, the invention provides an extremely simple adjustment device that is outside the rotatable Sieve arrangement is located so that the squeegee angle can be changed without removing the hollow screen from the sieve arrangement, as was previously required.

As for the aspect of the present invention, the possibility to improve, to adjust the rotating screen in relation to its associated counter-bearing device, so are

en

simple, novel adjustment device / provided to the longitudinal displacement of the hollow screen in relation to its associated counter-bearing device and for a tangential movement of the hollow screen in relation to its separate counter-bearing device to care.

The invention is explained below on the basis of exemplary embodiments in conjunction with the associated drawing. In the Drawing show:

1 shows a perspective view of a screen printing machine designed according to the invention;

2 shows a perspective partial view on a greatly enlarged scale and in an exploded view a rotatable screen assembly as used in connection with the present invention finds;

3 shows a perspective view, partially in section, of the rotatable screen arrangement according to FIG. 2;

4 shows a side view of the feature according to the invention, partly in perspective and partly in section the use of a plurality of elongated, individually inflatable tubes for the selective application of different areas of the total length the squeegee shown with pressure;

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Figure 5 is a partial side view of a novel rotatable
Sieve arrangement and part of the adjustment mechanism provided for this purpose according to the invention;

FIG. 6 is a partial perspective view of a portion of FIG
er.f indentation device; and

FIG. 7 shows a perspective partial view similar to FIG. 6,
which however illustrates the way in
the one of the new rotatable sieve arrangements
adjustable in relation to the frame
is.

In detail, FIG. 1 shows a screen printing machine generally designated 10. The screen printing machine 10 has a frame 12 with lateral supports 14 and 16 which merge at their respective upper ends into circular sndlager 16 'and 18, respectively. A counter bearing roller 20 is rotatable in the end bearings 16 ′ and 18
stored. In the unifangsrichtung of the counter bearing roller 20 are distributed by means of generally designated 22 Stutζanierungen that of
projecting from the two end bearings 16 ′ and 18, a plurality of identical rotatable screen assemblies 24 are supported. The structure of the
Rotatable screen assemblies 24 will be explained in more detail below, but it is sufficient to understand at this point that such rotatable screen assemblies are known to have a hollow screen or a hollow screen 26 with a fine-meshed structure, through the printing ink or paste through an internal doctor blade arrangement is urged in order to print corresponding patterns on a printing carrier 28 which runs between the counter bearing roller 20 and the rotatable screen arrangements 24. On the same shaft (not shown) on which the counter bearing roller 20
sits, a large gear 30 is rotatably arranged, the teeth of which are in mesh with corresponding teeth of a gear 32,
with which the individual rotatable screen assemblies 24 are equipped
are, so that upon rotation of the counter bearing roller 20 and thus the
Gear 30 a corresponding rotation (but in the opposite direction) of the hollow screen 26 is triggered.

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Before going into the specific improvements according to the invention is, it should be noted that it emerges from the above explanation that the invention in connection with a rotating Screen printing machine has been explained, d. H. in connection with a screen printing machine, which has a large rotating counter bearing roller 20 includes in order to distribute in the circumferential direction at intervals the rotatable screen assemblies 24 are arranged from one another are. However, the invention is not restricted to such an area of application as - as will become apparent - the Principles of the invention can also be applied to a conventional flatbed screen printing machine in which the majority circumferential screen printing arrangements arranged in the same plane and each equipped with an individually assigned counter bearing roller are.

As can be seen from FIGS. 1-3 and 5, each has a rotating screen arrangement 24 has an inner elongated support body 36, which is provided at both ends with a support bearing 38 (of which in Fig. 3 and. 5 only one is visible) is provided. Extending from opposite ends of the inner elongate support body 36 a first and a second hollow axle body 40 and 42 (only the hollow axle body 42 being visible in FIG. 1), the have an inner cavity 44, the purpose of which will be explained in more detail. As can be seen from Fig. 5, this is hollow screen 26 freely rotatable with respect to the inner elongated Support body 36 is supported by being telescopically held by two circular end plates 48 which are in relation to the associated hollow axle body 40 (or 42 at the other end) in connection with ball bearings 50 are freely rotatable. A retaining ring 52 ensures in connection with a shoulder 54 of the corresponding hollow axle body 40 (or 42) that a longitudinal displacement of the End plate 48 is prevented, but without impairing their rotatability.

The inner elongated support body 36 supports an elongated one Application device, which is formed in the illustrated embodiment by a conventional doctor blade 56, the

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End engages the inner surface of the screen 26 to allow ink to pass through to crowd the patterned zones. As best seen in Fig. 3, the doctor blade 56 protrudes from a substantially rectangular one Squeegee holder 58 from before. At opposite ends of the squeegee holder 58 are outwardly directed lip parts 60, over which extends a pin 62 which is held under tension by means of springs 64 and 66, so that the squeegee holder 58 together is normally urged in the downward direction with the squeegee 56, as shown in FIGS. The squeegee holder 58 is limited to vertical movement by a substantially U-shaped profile rail 68, with a yoke region 70 of the profile rail 68 is attached to a support plate 72 carried by the support bearing 38. The support bearing 38 is in turn of the inner elongated support body 36 carried.

As is well known, the alignment is chosen so that the point of attack the doctor blade 56 on the inner surface of the screen 26 is located on the radius of the counter bearing roller 20. In other words, the doctor blade is - based on FIG. 3 - perpendicular to the path of movement of the print carrier 28, which is between the hollow screen 26 and the counter bearing roller 20 runs. (Naturally, the prior art has suggested that it is occasionally desirable to change the angle at which the squeegee engages the inner surface of the screen 26, and indeed a particular one below described advantageous feature of the present invention, according to which the angle of the doctor blade is from an outside of the Hollow sieve 26 lying position can be changed.)

According to a feature of the present invention - as illustrated in particular with FIGS. 3 and 4 - a novel pressure setting device provided inside the hollow screen, by means of which the on the doctor blade 56 (and thus the pressure with which the Squeegee 56 engages the inside of the screen 26) pressure exerted can be changed selectively along the longitudinal extent of the squeegee. Such a pressure adjustment device comprises a plurality of individually inflatable elongate tubes 74, 76 and 78, the behind the doctor blade holder 58 within the cavity of the U-shaped

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Profile rail 6 3 are arranged. These inflatable tubes are made made of rubber or similar elastic material and work largely like individual elongated balloons. By means of suitable fluid or air supply hoses 80, 32 or 84 as well as suitable ones Pressure generating means (such as a conventional compressor - not shown - suitably equipped with valves is to selectively distribute the compressed flow to the Tubes 80, 32 and 84 to allow) the individual inflatable Tubes 74, 76 and 78 are selectively inflated to vary the pressure behind the doctor blade along its length. As previously mentioned, this has been found to be particularly advantageous with regard to wide screen printing devices where the inclination consists in that the central region of the rotating screen bends slightly away from the associated counter-bearing roller 20. According to the invention Compensation can be provided by inflating the middle tube 76 a little more than the end tubes 74 and 78, respectively is so that a greater pressure is exerted behind the squeegee 56 along its central region. It goes without saying that the prescribed Example is only intended to show the versatility of the plurality of selectively inflated tubes 74, 76 and 78 and that the This in no way restricts the invention. In fact, the selective pressure along the length of the squeegee is as it can be realized by this aspect of the invention, very useful under all conditions for the correct squeegee pressure to build along the longitudinal extension in the appropriate manner and thus the flow of the printing ink through the screen 26 for the To control attack on the fabric to be printed in the appropriate manner. It is also understood that although out of three inflatable Pipes 74, 76 and 78 was mentioned in the preceding explanation, but that any other number of pipes that exceeds the value one, can be used according to the degree of selective influencing desired for a particular application is.

As previously explained, the invention further comprises an adjusting device, around the inner elongated support body 36 of the individual rotatable screen assemblies about its axis from an outside to rotate the respective hollow screen 26 lying point, so that

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the angle of the applicator (i.e. the angle of attack of the Squeegee 56) can be selectively changed from a location outside of the hollow screen. It can be seen, especially in connection with Fig. 1 and 6, 7 that for each rotatable screen arrangement 2 4 the frame has two outwardly projecting (spoke-like) lugs 86 and 88, respectively. Carriages 90 and 9 2, respectively, are slidably guided on lugs 86 and 88 and have forwardly projecting spindles 9 4 which are shown in FIG engage the threads of heads 96 which are attached to the lugs 86 and / or. 88 are attached. There are handwheels 98 on the spindles 9 4, which can be rotated so that the carriages 90 and 92 along the lugs 86 and 88 in the inward and outward directions in Move with respect to the counter bearing roller 20.

As can best be seen from FIGS. 6 and 7, the slide 90 has wall parts 100 and 102 which project upwards and form a bed for rotatable shaft bearings 104 and 106 (the shaft bearing 106 only being visible in FIG. 1), which the corresponding hollow axle body 40 and / or. 42 that extend from opposite ends of the respective rotatable screen assembly 24. In order to cause a rotation, an arm 105 is fastened to the wall part 102 by means of fastening elements 108. The arm 105 has a threaded opening at its end through which an adjusting screw 110 is passed. At the front of the shaft bearing 104 a horseshoe-shaped plate 112 is fixed with a projection 114 whose 2ähne 116 mesh with the teeth of the adjusting screw 110 in the manner of a worm gear engaged dine rotation of the screw 110 causes a corresponding rotation of the shaft bearing 10. 4

As previously mentioned, the shaft bearings 104 and 106 take the rotatable Sieve assembly 2 4 the corresponding hollow axle bodies 40 and 42 in a supporting manner, extending from the opposite ends of the inner elongated support body 36 of the rotatable screen assembly 24 from. ,, As can be seen from FIGS a section 118 of the hollow axle bodies 40 and 42 with an external thread and an outwardly directed spring 120 which engages in a somewhat longer spring groove 122 in the rotatable

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Shaft bearing 104 (Fig. 6) is provided. When the hollow axle body 40 and 42 are introduced into the shaft bearings 104 and 106, the spring / groove arrangement 120/122 drives the hollow axle body 40 together with the bearing body 104. Due to the greater length of the In comparison to the spring 120, the spring groove 122 can be used in the hollow axle body 40 can be displaced in the longitudinal direction in relation to the shaft bearing 104, as will be explained further below. How out 5, two adjusting nuts 124 and 126 are screwed onto the portion 118 of the flon salmon body 40 relative to the horseshoe-shaped plate 112 and the rear End of the shaft bearing 104 can be clamped.

From the above it can be seen that by turning the set screws 110 the shaft bearing 104 (hollow axle body 40 and inner elongated support body 36 together with the support bearing 38) rotated is to change the angular position of the doctor blade 56 with respect to the inner surface of the screen 26. As is well known, leads a change in the angle of the squeegee 56 to a change in the effectiveness of the squeegee in pressing ink through the fine mesh Pattern of the hollow screen 26, if this is on the edge of the squeegee turned past. According to the present invention, the prescribed arrangement makes it possible to adjust the angular position of the doctor blade 56 to change from a point outside of the screen 26.

The present invention also provides an adjusting device in order to effect a longitudinal displacement of the rotatable screen assemblies 24 in relation to the counter bearing roller 20. This is done in a particularly simple and advantageous manner by evaluating the aforementioned adjusting nuts 124 and 126. It is specifically assumed, with reference to FIG. 5, that the screen assembly 24 must be moved to the right. Han only needs to adjust the SbII-jiiutter 124 a few gears so that it moves away from the plate 112 (FIG. 6), and then turn the straight nut 126. Since the Steilruutter 126 cannot move to the left (as can be seen in FIG. 5, because it strikes against the shaft bearing Iü4), the entire hollow axle body 40 and the remaining part of the Siebanor at ung 24 move longitudinally to the right . In

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similarly, if the screen assembly 24 has to be moved to the left, only the adjusting nut 126 is loosened and the adjusting nut turned. Because the actuators 124 do not move to the right can, therefore, the entire hollow axle body 40 must be together with the rotatable screen assembly 24 migrate to the left.

According to the invention it is also possible to use a single screen arrangement 24 tangentially (i.e. up or down) with respect to the anvil roller 20 in order to bring the pattern into register. It goes without saying that by tangential displacement of the screen arrangement 24 in relation to the counter-bearing roller 20, the assignment of the pattern located tangentially on the corresponding hollow screen 26 is changed in relation to the counter bearing roller. As

which can be seen from Fig. 5, the gear 32 is in / position, both a Rotation as well as a longitudinal displacement along the hollow axle body 40 to be carried out by means of ball bearings 130 and 132. The gear 32 is provided with at least one passage 134, of which each freely receives an elongated pin 136. Each tenon 136 has a reduced diameter threaded portion, which protrudes through the end plate 48 and is in engagement with a nut 140. Thus, rotation of the gear 32 becomes dependent of the rotation of the gear 30 transmitted through the pin 136 so that the end plate 48 and the hollow screen 26 to the rotate inner elongated support body 36.

As best seen in Figs. 2 and 6, the teeth 142 of the Gear 32 as well as the corresponding teeth 144 of the main gear 30 are spirally aligned, the teeth 144 are significantly longer than the corresponding teeth 142 of the individual sieve arrangements 2 4. Thus, when the single gear 42 in Is moved longitudinally along the hollow axle body 40, so calls the interaction of the spirally aligned teeth 142 and 144 not only a longitudinal movement, but also in a certain one Scope of a vertical movement (depending on the direction in which the gear 32 moves along the hollow axle body 40). In other words, the helical pitch of the teeth 142 and 144 provides a vertical displacement of the gear 32 (into the

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Paper plane of FIG. 5 or out of this) as well as for a corresponding one Longitudinal shift, according to the nature of the longitudinal shift of the gear 32 has no effect on the end plate 48 or the hollow screen 26 (because of the free sliding movement of the pin 136 in the passage 134), however, the vertical movement of the gear 32 leaves the entire screen assembly 24 in the tangential direction in relation migrate to the counter bearing roller 20 in the upward or downward direction, so that a change in the tangential assignment of the Iluster of the hollow screen 26 to the counter bearing roller 20 is possible.

It has already been pointed out above that in order to obtain the desired To cause longitudinal displacement of the gear 32, the hollow axle body 40 has a cavity 44 with an internal thread. Of the Hollow axle body 40 also contains an elongated passage 146 running in the transverse direction. In the hollow space 44 of the hollow roof countersink pe rs 40, a shaft 148 with an external thread is arranged, which is traversed transversely by a pin 150. As can be seen from Fig. 5, the opposite end of the pin extends 150 through Jen elongated passage 146 to engage a hub portion 152 of the gear 32 with a protruding end. Rotation of the externally threaded shaft 148 in the internally threaded cavity 44 of the outer hollow axle body 40 thus leads to a displacement of the pin 150 (and thus of the gear 32) in the longitudinal direction to the right or left - according to Fig. 5 - depending on the direction of rotation. In order to effect such a direction of rotation, is at the far left end of the hollow axle body 40 of FIG. 5, a rotary knob 154 is provided which is fastened to the shaft 148 by a cylindrical section 156. This cylindrical section v / e has a shoulder 158 which can bear against a ball bearing 160, which is in its position by means of a retaining ring 164 held by a sleeve 166. Turning the rotary knob 154 thus turns the one with an external thread provided shaft 148 rotated in relation to the meshing internal thread of the cavity 44 of the hollow axle body 40 to the to effect the desired longitudinal displacement of the shaft 148. As mentioned, this longitudinal displacement is caused by the pin 150 on the Gear 32 transferred so that the spirally aligned

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Teeth 142 and 144 drive gear 32 in both vertical and vertical Move lengthways. As a result of the freely sliding pin, the vertical displacement of the gear 32 is caused by the vertical displacement of the inner elongated support body 36 and the hollow screen 26 accompanied, but causes the horizontal displacement of the gear 32 no horizontal movement of the cabbage screen 26 and the support body 36 around which it rotates.

Patent claims :

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Claims (15)

- 14 patent claims : Screen printing machine with a frame on which a counter bearing device is supported, with at least one rotatable sieve arrangement, which by means of an adjustable bearing device is adjustably attached to the counter-bearing device and an inner elongated support body, one around the Support body rotatably mounted outer hollow screen, one attached to the elongated support body by means of a bearing elongated application device for attacking the inner surface of the hollow siab as well as an inflatable Druckeinste11 device which engages the applicator to urge it against the inner surface of the hollow screen, thereby characterized in that the inflatable pressure adjusting means comprises a plurality of individually inflatable elongate ones Contains tubes (64, 76, 78) which are arranged behind the applicator so that the applicator is more impinging Pressure is selectively changeable along the longitudinal direction. 2. Screen printing machine according to claim 1, characterized in that the plurality of inflatable tubes have an odd number of inflatable tubes Pipes included. 3. Screen printing machine according to claim 1 or 2, characterized in that that the mounting for the application device has a substantially U-shaped profile rail (68), which is held by the inner, designed as a support body (36) elongated support body that the elongated Pipes (74, 76, 78) in the cavity of the U-profile rail (68) are arranged behind the Änahmeinrichtung and that the Screen printing machine also has a pretensioning arrangement (62, 64, 66), the application device normally against the bottom of the rail (68) and in engagement with the elongated tubes (74, 76, 78) urges. 4. Screen printing machine according to one of claims 1-3, marked 4 0 9 8 3 0/0399 characterized by a first setting device (110, 112, 103, 106, 40, 42) for rotating the inner elongated support body about its own axis from an outside of the hollow screen (26) lying position. 5. Screen printing machine according to claim 4, characterized in that the elongated support body has a first and second Having hollow axle bodies (40, 42) extending from opposite ends thereof to outside of the hollow screen (26) Extend points out, and that the first adjustment means a first and a second shaft bearing (104, 106) carried by the frame (12) on opposite sides thereof, around the first and second hollow axle bodies, respectively (40, 42), and that further a selectively operable drive mechanism (110, 112, 114) for Rotation of at least one of the two shaft bearings (104, 106) and a connecting device (120, 122) for releasable Connection of the one shaft bearing (104) and the hollow axle body (40) received by it for rotation therewith provided are, 6. Screen printing machine according to one or more of the claims 1-5, characterized by a second adjusting device (124, 126, 120, 122) for the longitudinal displacement of the inner elongated Support body in relation to the frame (12) for adjusting the longitudinal position of the hollow screen (26) in relation to the counter bearing roller (20). 7. Screen printing machine according to claim 6, characterized in that the elongated inner support body has a first and second extending from its opposite ends Shaft body, a first and a second shaft bearing (104, 106) on opposite sides of the frame (12) are fixed to support the first and second shaft bodies, and that the second adjustment means (120, 122) a pedestal groove (122) provided in one shaft bearing (104) and one of the shaft body 409830/0399 (40), which is arranged in the one shaft bearing (104), has protruding tongue (120) and that the tongue groove (122) is able to releasably receive the spring (120) and is longer than the spring (120) to allow a longitudinal movement of the inner elongated support body in relation to the one shaft bearing (104) to enable when the shaft body is rotatably coupled therewith. 8. Screen printing machine according to claim 7, characterized in that that the second adjusting device has two adjusting nuts (124, 126) that one of the shaft bodies (40) with one provided with an externally threaded portion (118) which is of a greater length than the associated retaining lug (86) and that the adjusting nuts (124, 126) on opposite sides Sides of the extension (86) are screwed to the externally threaded portion (118). 9. Screen printing machine according to one of claims 1-8, characterized by a third adjustment device (32, 142, 136, 148, 150, 154) for the tangential displacement of the inner elongated support body in relation to the counter bearing roller (20), so that the hollow screen (26) tangentially in relation can be moved to the counter bearing roller (20) and thus changes in the mutual system pressure are possible. 10. Screen printing machine according to claim 9, characterized in that that the third adjustment device has a gear (32), the inner elongated support body has a first and second hollow axle body (40, 42) extending from opposite sides thereof to locations outside the hollow screen (26) that / lugs (136) the gear (32) and the hollow screen (26) rotatably, but leaving a free longitudinal displacement of the gear (32) in relation to the first hollow axle body, and that a selectively actuatable drive mechanism (140, 150, 154) is provided for the longitudinal displacement of the gear (32). A09830 / 0399 11. Screen printing machine according to claim 10, characterized in that that the hollow screen (26) is supported on the elongate support body by first and second end plates (48) which freely rotatable in relation to the inner elongated support body, but in a longitudinal movement in relation are prevented, and that the pin (136) in eccentric assignment to the one shaft body freely by a the end plates (48) and the gear (32) is guided. 12. Siebdruckxaaschine according to claim 10 or 11, characterized in that that the gear (32) has spirally aligned teeth (142) and around the circumference of the counter bearing roller (20) around at one end of which spirally aligned teeth (144) are arranged, which with the teeth (142) of the Gear (32) are in mesh, and that the teeth (144) wider than the spirally aligned teeth (142) of the Gear (32) are designed that the selectively actuatable drive mechanism (148, 150, 154) has an elongated, as Control member effective shaft (148), which in the longitudinal direction in a cavity (44) of a hollow axle body (40) is displaceable that the cavity (4 4) of the hollow axle body (40) has an internal thread and that in the cavity (44) housed shaft (14 <3) has an external thread which engages with the internal thread of the cavity (44) stands. 13. Screen printing machine with a frame on which a counter bearing device is supported, with at least one rotatable sieve arrangement, which by means of an adjustable bearing device is adjustably attached to the counter-bearing device and an inner elongated support body, one around the Support body rotatably mounted outer hollow screen, one attached to the elongated support body by means of a bearing has an elongated application device for attacking the inner surface of the hollow sieve and an adjusting device, for urging the applicator into engagement with the inner surface of the hollow screen, characterized by a first 409830/0399 Adjustment device (110, 112, 103, 105, 40, 42) for rotation of the inner elongated support body (36) about its own axis from a location outside of the hollow screen (26) the end. 14. Screen printing machine according to claim 13, characterized by a second adjusting device (124, 126, 120, 122) for the longitudinal displacement of the inner elongated support body (36) in the Relation to the frame (12) for adjusting the longitudinal position of the hollow screen (26) relative to the counter-bearing device (20), 15. Siebdruckinas chine according to claim 13 or 14, characterized in that that the counter-bearing device has a counter-bearing roller (20) and that a third adjusting device (42, 142, 136, 148, 150, 154) for tangential displacement of the inner elongated support body (36) is provided in relation to the counter bearing roller (20) so that the hollow screen (26) can be moved tangentially in relation to the counter bearing roller (20) and thus changes in the intervening Attack pressure are possible. Ktf / hs 5 '4 0983 0/0399 Blank page