The positioner of the flexible printing flat board on the dull and stereotyped cylinder
Technical field
The present invention relates to the positioner of the flexible printing flat board on a kind of dull and stereotyped cylinder, specifically, relate to a kind of device that this flexible printing flat board is offset on the dull and stereotyped cylinder of swinging printing machine.
Background technology
This machine is in being commonly used in packaging industry, in order to print plate shaped workpiece (for example, paper or cardboard); Be commonly referred to flexible graphic printing machine.This machine comprises many composition stations, that is, with reference to the direction of motion of this plate shaped workpiece, according to from the upstream to the logical development in downstream, include a paper feeding station; On the paper feeding station, this machine is got paper successively one by one from the top of a pile paper; Then be one or more print couple (if necessary, between these print couple, can place one or more drying machine); Be the output station at last; And on the output station, then collect the workpiece that prints.Paper is delivered to another station or print couple by a roller train and an intake system from a station or a print couple, and on the paper of putting behind; Like this, the following print surface of this paper is blank fully.
In this print couple, used the dull and stereotyped positioner of printing.Each print couple is generally only printed a kind of color, and it comprises a dull and stereotyped cylinder.Round this flat board cylinder flexible printing flat board of reeling, this flat board is stretched on this flat board cylinder.When the cylinder with many meshes was coated ink, according to the difference of the printing stencil number that cylinder had, in cylinder rotated each time, this printing is dull and stereotyped can print one or more patterns on the paper that moves between this flat board cylinder and puck.This flat board cylinder and puck are configured to and can print on the lower surface of paper.
The printing stencil that is made of rubber or plastics is bonded on the flexible supporting base of being made by polyester (for example polyester film) usually, is called the dull and stereotyped assembly of printing so that form one.After having made printing stencil, it is very important operational sequence that printing stencil is bonded on this polyester pedestal.This operation is finished by manufacturing firm, and it has directly determined the printing quality of aiming between the different colours.The upstream extremity of this flexible support pedestal and downstream are equipped with a plastic tape, and the longitudinal edge of this plastic tape has the cross section of U-shaped, and this printing flat board can be fixed on the pawl that is fastened on this flat board cylinder.The installation direction of this pawl is parallel with the gyroaxis of this flat board cylinder.Have one attached to a thin metallic plate on this plastic tape and have the slot that is through to the axis in downstream longitudinally from the upstream.This metal sheet is by being installed in a central pin on this pawl, can make the fast dull and stereotyped and located lateral on this flat board cylinder accurately of this printing.
When on the flexible support pedestal that this printing stencil is bonded in above-mentioned polyester, respectively by making this flat board cylinder do transverse movement, or make it center on its rotation, can easily proofread and correct laterally or the longitudinal register error; If cause but error is skew by this printing stencil, then can not proofread and correct like this.If the direction of the side of this printing stencil is not parallel or vertical with the direction at the upstream and downstream edge of this polyester pedestal, then the direction that provides with respect to the gyroaxis by this flat board cylinder of the position of this printing stencil can produce the skew that is difficult to proofread and correct.
If a plurality of printing stencils of bonding on a flexible polyester pedestal, and each template all has identical biased error, then in general, the top edge of each printing stencil all aligns, like this, these a plurality of printing stencils become to the same with the single big printing stencil with the position error that is caused by offset located.
In order to address this problem, present various known devices is to make fore paw and rear solid end with respect to the gyroaxis rotation of this flat board cylinder, so that should print flat board on the direction opposite with described error, is offset identical amount.
United States Patent (USP) has been described one for No. 5488904 and has been comprised two devices that clamp the parallel bar of the dull and stereotyped end of this printing.Mechanism by a graduated eccentric gauge control of hand rotation makes the dull and stereotyped back fixed bar of this printing do transverse movement (parallel with the gyroaxis of dull and stereotyped cylinder), and make the preceding bar that is hinged on a bool assembly on the terminal a plurality of fulcrums of this printing flat board, rotate around fulcrum.In this device, when the dull and stereotyped two ends of this printing are clamped,, make this back bar automatically on the position parallel with the position of this preceding bar by the spring driven hinge connection that is placed on this back bar one end, rotate around fulcrum.Entire mechanism is placed on the bottom of the wide and dark groove of this flat board barrel; This groove is to process on the direction parallel with the gyroaxis of this flat board cylinder.The eccentricity control device of this mechanism is installed on the side of this flat board cylinder.
Patent EP-232 ' provides for No. 730 another printing dull and stereotyped offset assembly, and the principle of this mechanism is that two pull bars that clamp two dull and stereotyped ends of this printing are rotated around fulcrum.The end of these two pull bars is connected to each other by two leg-of-mutton hinge flat boards, and these two hinge flat boards are installed on two a fixed pivot axis that are fixed on this flat board cylinder.The fulcrum of this hinge is a rectangular shape, and therefore, the dull and stereotyped pull bar of this printing can rotate around a virtual point P on the central shaft of this flat board cylinder.Control device is placed on a side of this flat board cylinder, and comprises a complex mechanism of being made up of many hinged levers.When this flat board cylinder was parked on a position of predesignating, this hinged lever can be driven by a single cylinder.
Utilize for patent JP62-56146 number a device that comprises two bars to solve the dull and stereotyped biasing problem of printing, each the root bar in these two bars is by two Driven by Hydraulic Cylinder.In the time must proofreading and correct the dull and stereotyped diagonal positions of this printing, the oil pressure in four hydraulic cylinders reduces, and makes by four spring relaxations of these four hydraulic cylinders compressions, forces the fixed bar of this printing flat board to be done backward and opens motion.Print in controller of corrected value input of dull and stereotyped diagonal positions, controller is converted to oil pressure with it, is added on two other hydraulic cylinder of the same side that is installed in this fixed bar one end.Under the effect of this two other hydraulic cylinder, two clinoplains can be done rectilinear motion independently; Like this, when making two dull and stereotyped fixed bars of this printing near each other,, can force an end of each bar to be done and move both vertically because this clinoplain is triangular shaped.In a preferred embodiment, this clinoplain can also drive with a motor-driven screw mechanism.
These devices have several shortcomings, that is:
The existence of the so-called closed mechanism of-heaviness need be provided with a groove in this flat board barrel, the size of this groove is bigger with respect to the diameter of this flat board cylinder;
-exist undesirable imbalance; Because the importance of this mechanism is set, therefore, when dull and stereotyped cylinder reaches certain speed of gyration, its bearing is had some requirement for restriction;
-reduced a very big width of the desired groove of this offset assembly round the circumference working surface of this flat board cylinder;
-in some cases, manually adjust, this requires machine to quit work in the very long adjustment time;
-when restarting work, can not rely on the dull and stereotyped full automation of adjusting of printing, because for this work, its adjusted value should store with digital form, and this device is not done like this;
-under the situation of non-manual adjustment, must utilize another one to do laterally or the irrelevant actuator of the actuator of circular motion with making this flat board cylinder, control the mechanism that makes the dull and stereotyped skew of this printing.
According to the dull and stereotyped offset assembly of printing of the present invention, it is a simple and automation, only occupies volume very little in the dull and stereotyped barrel, and does not need the device of shutting down during adjustment, is used for overcoming above-mentioned shortcoming.In addition, because the volume that occupies is very little, so this device is not the offsetting mechanism work that relies on the printing flat board that driven by the actuator that is placed in this flat board barrel.In order to drive the dull and stereotyped offsetting mechanism of this printing, device of the present invention utilizes a motor that is fixed on the press rack; This motor is with to make dull and stereotyped cylinder make the motor of horizontal adjustment identical.This solution can more reasonably be used the actuator that has set for the dull and stereotyped horizontal adjustment of this printing on the one hand; Other direction can make that offsetting mechanism is cheap, volume is not too huge, but intensity and reliability height, and easily adaptation not with the dull and stereotyped cylinder of this mechanism.At last, because this mechanism is arranged, when using external electrical controller that is connected with a plurality of position sensors that are placed on this flat board cylinder outside, can measure and store the various adjustment positions that are applicable to relevant work.Therefore, can restart these work at an easy rate, and not need to remember these adjustment positions.The another one advantage of a kind of scheme in back is that it is particularly suitable for mechanism of the present invention.
Summary of the invention
For this reason, the objective of the invention is to provide a kind of positioner that makes the flexible printing flat board of the dull and stereotyped skew of printing on the swinging printing machine.
A kind of device that flexible printing flat board is located on dull and stereotyped cylinder, this device can make the dull and stereotyped skew of the printing on the swinging printing machine; This dull and stereotyped cylinder with gyroaxis is included in a groove of making on the direction parallel with this gyroaxis, is placing the dull and stereotyped positioner of described printing in this groove; This device is that dull and stereotyped cylinder is then by an external device (ED) driving job that is fixed on the press rack by the transverse movement driving work of this flat board cylinder; In addition, this device is also by being placed on the cylinder outside, a cam ring driving job relative with this device; Be fixed on a roller on the movable base plate and be close to the inward flange of this cam ring, this base plate is fixed on this flat board cylinder by clamping device and two cams that are securely fixed in the trench bottom of dull and stereotyped cylinder, and can be with respect to this cylinder freely-movable; Two rollers that are fixed on this base plate of cam control are done the opposite banking motion of direction.Drive this external device (ED) of the dull and stereotyped positioner work of printing, form by a motor, a mechanism and a digitial controller that makes this flat board cylinder do transverse movement along its gyroaxis; This digitial controller utilization is installed in the common sensor on the press rack, can measure and store the displacement sizes values and the direction of this flat board cylinder transverse movement.Described each cam is made of the pedestal of rectangle, and this pedestal utilizes screw and at least one central pin to fix and accurately be placed on the bottom of the groove of dull and stereotyped cylinder respectively; On this pedestal, make two leg-of-mutton projection pieces; Roller can be done the slip that does not have play between the longest surface of these two leg-of-mutton projection pieces, these two triangular hill spares become 30 ° of configurations with the gyroaxis of this flat board cylinder.
Description of drawings
Employed in this manual in order to give, be used to illustrate that the expression way of the position of some part in this printing machine gives a definition, should be appreciated that term " operator's side " (C.C.) and " operator's opposition side " (C.O.C.) be meant a side of seeing from longitudinal center's axis of this printing machine.Doing like this is ambiguous for fear of common term " left side " and " right side ", because this is decided by the place that the observer observes.Equally, in order to describe the direction of some or device, still adopt common term " longitudinally " and " horizontal "; But that is for the central axis of printing machine, and the direction of this central axis is then determined by the direction of motion of plate shaped workpiece.At last, should be pointed out that term " upstream " and " downstream " they are with respect in printing machine, the direction of motion of flat work.
By below in conjunction with accompanying drawing,, can understand the present invention better to the explanation of a non-limiting example.Wherein:
Fig. 1 a and Fig. 1 b are for representing to be installed in the 3rd C.O.C. (operator's opposition side) of the offset assembly on the dull and stereotyped cylinder and the plane of the 3rd C.C. (operator's side) respectively;
Fig. 2 is the partial cross section figure of C.C. (operator's side) end of the positioner of a flexible printing flat board on this flat board cylinder;
Fig. 3 and Fig. 4 are respectively the sectional view of being got along the A-A line of Fig. 1 a and Fig. 1 b and B-B line that is installed in the offset assembly on this flat board cylinder;
Fig. 5 a and Fig. 5 b are respectively half C.O.C. (operator's opposition side) and half C.C. (operator's side) of expression base plate, and the plane of mounted thereto pawl supporting;
Fig. 6 is the partial cross section figure near this dull and stereotyped cylinder on the direction parallel with the gyroaxis of this flat board cylinder, the C.C. of cam (operator's side);
Fig. 7 is the C.C. end of cam and the plane of corresponding chuck;
Fig. 8 a is the schematic plan view of the dull and stereotyped offset assembly of printing, more particularly, is the schematic plan view when this mechanism is in centre position that does not make the dull and stereotyped skew of this printing;
The place that Fig. 8 b is different with Fig. 8 a is that after rotating in the clockwise direction, the dull and stereotyped offsetting mechanism of this printing is in first terminal position;
The place that Fig. 8 c is different with Fig. 8 b is that after rotating in the counterclockwise direction, the offsetting mechanism of this printing flat board is at second terminal position.
The specific embodiment
Fig. 1 a and Fig. 1 b are the general layout that is placed on the dull and stereotyped positioner of a printing in the groove 1 that processes on the direction parallel with the gyroaxis 2 of dull and stereotyped cylinder 3.As the clearer expression of respective cross-section figure institute of Fig. 3 and Fig. 4, this offset assembly is bearing on the base plate 4, and a motionless fore paw 5 is fixed on this base plate.The breach 7 of fore paw 5 clips the forward edge that is placed on this flat board cylinder 3 bar printing flat board 19 on every side.The breach 8 of a movable rear solid end 6 relative with this fore paw 5 can be clamped the back edge of this printing dull and stereotyped 19.The C.O.C. of rear solid end 6 (operator's opposition side) end has a slide block 9, it and a roller 10 engagements that are screwed on the block 100; 100 of this pieces are fixed on this flat board cylinder 3 with two hold-down screws.At the opposite end (Fig. 2) of this positioner, this base plate 4 is connected with roller 11, and this roller 11 is placed between the side 12 and 13 of the cam ring 14 that is installed in a circle on the press rack (not illustrating among the figure).Can find out that from Fig. 1 a and Fig. 1 b two other roller 15,16 also is fixed on this base plate 4, they slide in two cams 17 on the bottom of the groove 1 that is securely fixed in this flat board cylinder 3 and 18 respectively.Device 101 and these flat board cylinder 3 mechanical connections of forming by a motor, and can drive dull and stereotyped cylinder 3 and do transverse movement along its gyroaxis 2.
As Fig. 1 a, Fig. 1 b and shown in Figure 3, this base plate 4 comprises the supporting 20 of many rectangular block shape, and their bottom is fixing by screw 21; And on supporting 20, fixing a block protection plate 22 with screw 23, the length direction of baffle is crooked.5 of fore paws are fixing with screw 24.Screw 24 is also clamping this baffle 22 simultaneously.On the opposite of this fore paw 5, fastener 103 (Fig. 4) is fixed on rear solid end 6 in the pawl supporting 25.This pawl supporting 25 is made up of a metallic plate with many elongated hole 26 (Fig. 5 a, Fig. 5 b), and minor axis 27 passes these holes 26, by trip bolt 28 this rear solid end 26 is fixed in the pawl supporting 25.The direction of these elongated hole 26 can make this pawl supporting 25 do transverse movement with respect to this rear solid end 6, and drives this rear solid end 6 and move on the direction vertical with the gyroaxis 2 of this flat board cylinder.By this motion rear solid end 6 is opened and closed, correspondingly clamp or unclamp the printing flat board 19 of this flat board cylinder 3.This pawl supporting 25 is securely fixed on two blocks 30 of the rectangular cubic shaped of sliding on two axles 31 by screw 29.These each ends of 31, by supporting 32 supportings, this supporting is fixed on the base plate 4 by screw 33.Above the supporting, a hold-down screw 34 is arranged at each, be used for axle 31 is locked at supporting 32.Therefore, on the vertical direction of this elongated hole 26, this pawl supporting 25 can be done lengthwise movement along axle 31, drives this rear solid end 6.
The motion of vertically opening of rear solid end 6 is controlled by 7 cylinders of working simultaneously 40 (Fig. 5 a, Fig. 5 b).Cylinder is by conduit 41 air feed, and conduit 41 then is fixed on this base plate 4 by fixing clip 42, and is connected to each other together by joint 43.These cylinders 40 utilize screw 45 to be installed in the L-shape supporting 44, and this L-shape supporting can be used as the fixing point of baffle 22 and fore paw 7 again.These support 44 spaced from each other at a certain interval, and each supporting all is installed on the base plate 4 with two trip bolts.Two ends curve the flat board 46 at right angle and place facing to cylinder 40, and an edge in two main edges of this flat board 46 erects, and weld together with pawl supporting 25.When the pneumatic circuit pressure of giving cylinder 40 air feed raises, withstand on the piston rod 47 (Fig. 1 a, Fig. 1 b) of these cylinders 40 on dull and stereotyped 46, promote this pawl supporting 25 in these dull and stereotyped 46 fronts.Like this, open with these pawl supporting 25 rear solid ends that are connected 6.
After the pressure removal in cylinder, a plurality of compression springs 48 promote this pawl supporting 25 and do vertical closing movement backward, and this rear solid end 6 is closed.Each spring 48 by the rod guidance of the screw 49 that passes this bent plate 46 to, an end of these springs just leans against on this bent plate 46.The other end of spring 48 leans against on the plug 50, and 50 of plugs are screwed in the block 51, and two screws 52 of block 51 usefulness are fixed on this base plate 4.Block 51 also can be used as the fixed bearing of second block of bend protection plate 53, and this baffle 53 partly covers the top of this pawl supporting 25.The bottom surface of this baffle 53 is fixing with many screws 54 (Fig. 1 a, Fig. 1 b) that are distributed on this block 51, and has the circular hole that holds plug 50.
The located lateral of printing dull and stereotyped 19 on fore paw 5, by the top that is contained in this fore paw 5, and the pin 55 (Fig. 4) that centers that accurately is placed on the longitudinal axis of this printing machine guarantees.
Fig. 5 b represents to be fixed on a securing member 60 on C.C. (operator's side) end of this base plate 4 by screw 61.Roller 11 utilizes screw 62 to be placed on the longitudinal axis of this securing member.At the diameter in first and near last two hole 63 1/3rd of base plate 4 diameter much bigger (Fig. 3) than the sleeve 64 that passes through these two holes.The oversize in hole 63 can provide motion needed space for this base plate 4, can make clamping device 102 this base plate 4 is clamped in the bottom of this groove 1 simultaneously.Like this, in dull and stereotyped cylinder turning course, can control the effect of centrifugal force to this base plate 4.Clamping device 102 is made up of sleeve 64, round this sleeve 64 two support plates of being made by the low synthetic material of coefficient of friction 65 is arranged, and they can clamp this base plate 4, makes dull and stereotyped 4 motions easily.Be placed between two packing rings 67 and 68 one compression spring 66 and lean against screw 69 on this top packing ring 68, after passing sleeve 64 and being screwed on the bottom of this groove 1, maintenance is clamped in this base plate 4 on the cross section of dull and stereotyped cylinder abreast.A hole 70 is also arranged on securing member 60, and screw 71 passes this hole, and the effect of this hole and screw is identical with the effect of above-mentioned hole 63 and screw 69.
Shown in Fig. 5 a and Fig. 5 b, two rectangular openings 72 that cut out on base plate 4 can be placed the C.C. end cam 17 and the C.O.C. end cam 18 that are fixed on the dull and stereotyped cylinder 3.The size in hole 72 is bigger than the size of the pedestal 80 of cam 17 and 18, and like this, this base plate 4 can center on these cam freely-movables, and does not lean against on the cam.The horizontal boundary of each side in hole 72 is provided with three row holes in a straight line; The hole 73 at center can allow two cylindrical peg 75 accurately to give a chuck 74 location; And terminal hole 76 is suitable for utilizing screw 77 that this chuck 74 is fixed on this base plate 4.As shown in Figure 6 and Figure 7, chuck 74 is two bridges, and they are fixed on the base plate, and are configured in above cam 16 and 17.On the surface of the maximum of chuck 74, roller 15 and 16 have been screwed into from below; These two rollers can slide on corresponding cam 17 and 18.Screw 78 can be fixed on baffle 22 and fore paw 5 on this chuck 74.
Cam 17 and 18 is mutually symmetrical, and has a stair-stepping pedestal 80.Pedestal 80 is done the hole that can lay centrepin 81 on the one hand; Have two fixing holes 83 on the other hand.Two screws 82 that are screwed in this flat board cylinder 3 can slide in hole 83.Two leg-of-mutton small embossment spares 84 are arranged on this pedestal 80, and they form the core of this cam; Roller 15 or 16 corresponding to the cam of the cam of C.C. end or C.O.C. end slides between these two small embossment spares 84.
In order to grasp the operation principle of mechanism of the present invention better, Fig. 8 a, Fig. 8 b and Fig. 8 c schematically show three diverse locations that the dull and stereotyped positioner of this printing can have.If print dull and stereotyped non-migration, then this mechanism is on the centre position that adapts with schematic diagram 8a.
If this printing flat board must be offset on one or another direction, then dull and stereotyped cylinder can make the dull and stereotyped offsetting mechanism starting of this printing in the transverse movement of its gyroaxis 2 directions.The transverse movement of dull and stereotyped cylinder 3 is by device 101 controls.This device 101 comprises a motor, it be connected with the gear of worm engaging.This common mechanism is converted to the needed rectilinear motion of this flat board cylinder transverse movement with the gyration of motor shaft.Utilize the sensor that detects this flat board cylinder lateral attitude, can make the motion of this flat board cylinder of this motor and the driving of this mechanism realize automation.These sensors are connected with an external electrical controller (not shown) of the motor of this device 101 of control.Therefore, for a kind of given work, the dull and stereotyped skew of printing can be controlled and be stored by this electronic controller at an easy rate.For this reason, only need utilize position sensor, get final product by the transverse movement of storing this flat board cylinder simply.
Shown in Fig. 8 b, when dull and stereotyped cylinder during from C.O.C. one end motion to C.C. one end, through behind certain stroke, roller 11 has withstood the side surface 12 of cam ring 14.Then, base plate 4 is subjected to the roller 15 of slip on cam 17 and 18 and 16 guiding, produces integrated motion.This base plate 4 rotates round roller 11 on the one hand, and simultaneously, because this roller 11 is done sliding motion upwards along the side surface 12 of cam ring 14, this base plate produces mobile again.Only on roller 10, do the slide block 9 of the rear solid end 6 of longitudinal sliding motion, only allow to move and round to be fixed on this roller 10 on this flat board cylinder 3 as the revolution of a fixed pivot axis point.Because this slip is along transversal orientation, therefore, can not pass to rear solid end 6 along the moving of gyroaxis 2 of dull and stereotyped cylinder 3.Like this, since with the axle 2 parallel directions of dull and stereotyped cylinder on the effect of the rear solid end 6 that do not move, with the also issuable integrated motion of fore paw 5, leading edge that this printing is dull and stereotyped and back edge can be done shearing motion very simply and be offset, and keep parallel to each other simultaneously.
Fig. 8 c represents to produce same integrated motion in the opposite direction during to the C.O.C. end motion from C.C. end when this flat board cylinder 3.In this case, roller 11 leans against on the relative side surface 13 of cam ring 14, and slides along this side surface.
In order to proofread and correct the deviation post of printing dull and stereotyped 19, but operator's operating control device makes the pressure removal a little in the cylinder 40, should print flat board and this flat board cylinder and unclamp and break away from.But this control device is the motor of drive unit 101 just, makes this flat board cylinder 3 in a direction or the motion of another direction.In case with the side surface 12 or 13 rollers that contact 11 of cam ring 14, along this cam ring 14 move one section with the corresponding distance of desirable skew after, this flat board cylinder 3 moves round about, according to the lateral attitude that is suitable for printing, reorientates.The bias conditions of dull and stereotyped cylinder motion round about can change printing dull and stereotyped 19, because during counter motion, roller 11 unclamps with the side surface of cam ring 14 immediately.Because the printing flat board of tensioning is bonded on the dull and stereotyped cylinder, therefore can keep the dull and stereotyped deviation post of this printing.If known position of should the flat board cylinder laterally moving then can make this print angle value of dull and stereotyped automatic deviation at an easy rate.For this reason, as long as in advance this value that will be offset is imported above-mentioned electronic controller.
Printing is dull and stereotyped can to follow these steps to carry out being equipped with according to location on the dull and stereotyped cylinder of device of the present invention and offset operation:
A) utilize cylinder 40 compression springs 48, open rear solid end 6;
B) will print breach 7 neutralizations that dull and stereotyped 19 leading edge is clamped in fore paw 5 is fixed on the centrepin 55;
C) dull and stereotyped cylinder 3 is rotated lentamente around its axle 2, will print dull and stereotyped 19 and be wound on around the cylinder;
D) will print dull and stereotyped 19 back edge is fixed in the breach 8 of rear solid end 6;
E) pressure in the removal cylinder 40 is closed rear solid end 6;
F) the dull and stereotyped cylinder 3 of quick rotation, and start cylinder 40, printing dull and stereotyped 19 and dull and stereotyped cylinder are thrown off a little, so that make the dull and stereotyped skew of printing;
G), make the corresponding distance of the dull and stereotyped 19 some and desirable gradients of skew of printing by the transverse movement of dull and stereotyped cylinder 3;
H) make dull and stereotyped cylinder 3 do reverse transverse movement, recover the needed lateral attitude of printing;
I) pressure of removal cylinder 40.
Except will printing the dull and stereotyped operation that is fixed on the dull and stereotyped cylinder, utilize the principle and the special entity of the dull and stereotyped skew of printing of the present invention, can make above-mentioned other per pass operation realize automation at an easy rate.If previously known adjusted value is stored, then when restarting a printing work, this device does not need this printing flat board is manually adjusted.At last, it shall yet further be noted that when dull and stereotyped cylinder rotates with maximal rate that this device also can make the dull and stereotyped skew of printing.Therefore,, do not need printing machine is stopped, like this, when preparing a new printing work, can reduce service cost greatly in order to proofread and correct the dull and stereotyped obliquity of printing.In claims scope of the present invention, can carry out many improvement to this device.