DE1916513C3 - Dampening and inking unit for an office offset printing machine - Google Patents

Description

during the subsequent printing process, d. H. at on des Plate cylinder attached to the application roller deviates from the existing contact pressure

After adjusting the inking and dampening solution

linder 100, a blanket cylinder 120 and an impression cylinder 130 as well as a dampening unit 200 and an inking unit 300.

Common end link of the damp and inking

With the applicator roller still lifted off, the user can therefore expect that operating conditions will arise have set, which do not change significantly after placing on the plate cylinder for inking.

The supply or setting of the ink presetting at 5 kes is an application roller 60 on which the printing ink supplied by the inking unit 300 and the dampening solution supplied by the dampening unit 200 are brought together and which in turn the plate cylinder 100

_, ..__ filled with or

Learn more, so that at most the offset foil stretched on the plate cylinder still inks minor corrections of the inking and dampening. By means of which in Fig. 1 only shearly additions are required. Particularly advanta- indicated switching device 10 or 12 and is fed by way of that due to the constantly-impaired with the dampening roller pivot handles 11 and 13, the side in contact applicator roller can always an OFF plate cylinder 100 with respect to the Gummituchzyhnreichender and erforderlichen- in two positions 15 DERS 120 or the application roller 60 can be brought into a set-on and a lift-off position with respect to the dampening solution plate cylinder 100, which is also differently adjustable.

As can be seen from FIGS. 2 and 3, the two-sided bearings 62 and 68 of the application roller 60 are mounted in a pivot frame 20 with a pivot axis 21 fixed to the frame and arranged parallel to the axis of rotation 61 of the application roller. The swivel frame 20 consists of two arranged at each end of the roll.

plate-like and parallel 7U the

shirt in the through the line of contact of the plate cylinder and the tangential plane running in its contacting position, arranged.

Taking into account the flattening of the generally elastic jacket of the application roller when pressing against the plate cylinder is the one mentioned Line of contact through the

film is present, which excludes undesirable inking of surfaces of the plate cylinder without that additional auxiliary equipment or special attention on the part of the operator is necessary are.

An offset printing machine has already been proposed where a wet milk application

is pivotally mounted roller (German _reeling-r "

scripture 1611 263). In this machine, however, there are not 25 rockers extending side housing walls, the dampening agent application roller with a 22 and 28. Both rockers 22 and 28 are in constant contact with the ink feed roller in FIG. 2 obvious way with two hold up. "provided open slots 23 , the center plane of which M

In a further development of the invention inclined to the vertical and at a distance from the dampening and inking unit, the pivot axis of the pivot axis 21 of the pivot frame 20 is arranged-pivot frame of the applicator roller is at least attached. Each of the rockers 22 and 28 also carries

a holding claw 26 which is attached to the associated rocker 22, 28 by means of an adjusting eccentric 25 and is adjustable parallel to the center plane M of the slots 23 and which in turn is provided with a slot-like recess 24 which is essentially at right angles to the associated slot 23. The bearings 62 and 68 of the applicator roller 60

"" ..... ~ ^ -, β. ".....". "Are in the slits 23 crossing each other in pairs

Center line that extends in the longitudinal direction of the roller »o and recesses 24 are used, so that the position to replace kenden contact surface. the axis of rotation 61 of the applicator roller 60 with the aid of the

The geometric position adjustment eccentric 25 given hereby on both rockers 22, 28 allow a guration ratio advantageously a can be stared, regardless of the exact radial placement and lifting of the order angular setting of the swivel frame 20 and dawalze with respect to the circumferential surface of the plate cylinder 45 with the Application roller axis 61 around the frame-fixed ders, as a result of which, in particular, even with an elastic pivot axis 21.

Deformable applicator roller shell lubricating and The placing and lifting of the applicator roller 60

Wiping phenomena can be avoided. with respect to the plate cylinder 100 takes place through

In the following description, an exemplary angular adjustment of the entire swivel frame 20 is illustrated by way of example of the invention on the basis of drawings 50 about the swivel axis 21, with the aid of genes. This shows the toggle lever consisting of lever members 73 and 74

F i g. 1 is a schematic overall side view, driven 70. The corresponding lower a printing machine with in the area of the intcressie- lever members 74 are through a roller width rend assemblies broken housing wall, overlapping coupling shaft 71 rotating with each other

F i g. 2 an enlarged section of the side 55 firmly connected. These toggle mechanisms form the view shown in FIG. 1 with the dampening unit, the F i g. 1, schematically indicated switching device support roller and its holder as well as the plate device 12 for placing and lifting the application cylinder and the blanket cylinder, roller 60 with respect to the plate cylinder 100, FIG. 3 shows a partial top view of the printing machine in which the swivel handle 13 is seated on the coupling shaft 71 area of the laterally arranged functional elements 60 and a corresponding actuation of the accompanying FIG. 2, the toggle mechanism, ie a pivoting of the F i g. 4 shows a schematic diagram of the geometry of the two rocker arms 22 and 28 around the same carrier roller and plate cylinder bearings, angle and thus a displacement of the axis of rotation 61 FIG. 4 a shows an enlarged section of FIG. 4 in the sense of the placing or lifting movement of the application roller 60 in the contact area between application and dampening 65.

honeycomb. The application of the applicator roller 60 on the plate cylinder

Dic in FIG. I indicated office offset printing machine 100 is not in the example shown by the opposite

The machine includes a printing unit 1 with a plate-like pressure on the roller surfaces, but rather

limited with the help of special adjustment stops, and chend different widths b 1 and b 2 between

by means of a toggle gear 70 assigned application and dampening roller when the (y 1) is lifted

neter, indicated on the side walls of the machine frame and attached (x) application roller 60,

attached adjusting eccentric 72, which are shown in FIG. 2 shows that forms with the applicator roller

Aufsetzslstellung corresponding stops 75 of the He- 5 60 interacting dampening roller 40 with a

Belglieder 73 support. Dip roller 240, which comes from a storage container 205

In Fig. 4 are the geometric relationships of the dampening liquid to the dampening roller 40 promotes that

Goods storage reproduced, with the swivel dampening unit of the printing machine. Essential for that

frame 20 of the application roller bearing through the Ra interaction with the application roller 60 is the

dius between the pivot axis 21 and applicator roller io mounting of the dampening roller 40 fixed to the frame, which

zendrehachse 61 is indicated. Both in the up- the variable pressure of the fountain roller

setzstcllung as well as in the lift-off position with respect to 240 from the applicator roller IiO. The vcr-

in turn in the touchdown position against the pressure between immersion and wet

The plate cylinder located on the blanket cylinder 120 is used as a control variable for the

At the same time, the application roller 60 with the dampening 15 is used and can be increased to such an extent that

roller 40 in contact. the promotion by completely squeezing the

Between these two positions there is no win film between the two rollers,

kelhub 51, which is from the plane through the The rockers 22 and 28 are on the bearing

The pivot axis 21 and the axis of rotation 41 of the dampening of the applicator roller 60 are extended to the left.

roller 40 is divided symmetrically in the example. 20 device (Fig. 2) and form a common

This condition is, however, because of the soft swivel frame 26 for a roller arrangement,

structural condition of at least one of the rollers - apart from the application roller i & O one with the latter -

jackets, in particular the application roller 60 and interacting distributor roller 55 and one of these

if necessary also the dampening roller 40, not necessarily the upstream inking roller 50. The mutual

for maintaining the contact between the end bearing of the distributor roller 55 and the ink

them in both positions of the applicator roller 60. roller 50 are in recesses 52 that are open at the top

Basically z. B. also an asymmetrical or 57 of the rockers 22 and 28 used and in

Subdivision of the angular stroke S 1 through the plane A, this is releasably secured by spring clips 53 and 58, respectively.

into consideration, as shown in FIG. 4 through the lifters. In this way, the rollers can be

lung y 1 of the Schwcnkgcstells 20 is indicated. Here 30 take out the swivel frame 20 from the machine

at would z. B. in the lifting position of the application housing after releasing the spring clips 53, 58

In comparison to the symmetrical maintenance work, roller 60 is conveniently lifted upwards.

division closer to the point of contact.

between application roller 60 and dampening roller 40 a The swivel frame 20 is through to the

stronger mutual pressure and flattening 35 ink roller 50 bearing ends of the rocker 22

enter the two roll mantle. Such a non- and 28 acting tension springs 30 compared to the

A symmetrical arrangement can under certain circumstances be prestressed in the plate cylinder 100. This will be

With regard to a dampening of different thicknesses, the toggle mechanism 70, which is attached to its upper

telfilm on the applicator roller 60 in the two lever members 73 via pivot pin 76 with the

Positions should be displayed. 40 rockers 22 and 28 are connected, in the direction

Furthermore, in FIG. 4 the arrangement of the swivel against the respective toggle lever end positions

axis 21 spans in a common tangential plane 7Ί.

at the contact line of application roller 60 and As in FIG. 2 is indicated by dash-dotted lines, bil-plate cylinder 100 is indicated, these ratios being the axes of rotation of the axes of rotation in the rockers 22 and 28 for rollers 45 of the swivel frame 20 mounted on the blanket cylinder 120 , namely plate cylinder 100 and the axis of rotation 51 of the inking roller mounted on the latter 50 and the rotary applicator roller 60 apply. As a result, a radial axis 56 of the distributor roller 55 and the axis of rotation of the application roller 60 are lifted from that in the application roller 60, a plate cylinder 100 located in relation to the rotational set position, an axis 56 of obtuse-angled triangle, namely in one range. 50 roll transverse plane.

If the lifting of the applicator roll 60 in loading, this arrangement has the consequence that for the drive mainly using the off plate cylinder of the Verreiberwalze 55 against the two squeeze Toggle 100 is stir, it may be expedient that the rolls of which only the weight of Verreiberwalze pivot axis 21 in eCne tangential plane W by is decisive. As a result, the required contact line between application roller 60 and 55 contact pressure between said rollers can be determined by the lifted plate cylinder 100 . In general, because of the comparatively weak effect of the spring terminations, it is recommended that a central tangential clamp 53 or 58 be maintained over the bearings of the traversed Z between the mentioned cases as a counter roller 55. This means accepting carefully if both modes of operation can have a not inconsiderable constructive association. 60 chung. The Verrdiberwaize SS bearings are shown in FIG. 4 a & e, in the case of asymmetrical irregularities with corresponding play in the longitudinal direction of the sliding parts of the Wmkeürabes S1 through the slit-like recesses of the vibration-resulting contact and pressure zones 22 and 28 belonging to the plane A, are used.

1 sheet of drawings

552

Claims (6)

axis (56) of the distribution roller (55) blunt- angle claims: & * ^{triangle base} - 1 - dampening and inking unit for an office offset 5 printing machine with a to the plate cylinder The invention relates to a dampening and coming application roller for dampening inking unit of an office offset printing machine with a medium and color, which in one way stand out from the on-plate cylinder coming into contact with the plate cylinder allowing swiveling support roller for dampening solution and ink, all in one Gert is and with at least one also on the io allowing lifting from the plate cylinder Pivot mounted, color-feeding swivel is mounted and with at least one The paint roller is in sandy contact and also supplies paint that is also stored on the swivel frame sees an inking roller, which is independent of the swivel frame, in constant contact, the dampening solution supplying as well as gelawaize with an independent of the swivel frame works together, thereby identifying the dampening roller supplying the dampening solution draws that the cooperates from the pivot axis (21). of the swivel frame (20) and the axis of rotation (41) An important requirement is above all to the dampening roller (40) defined level (Λ) to avoid that when applying the application roller Angular stroke (Sl) of the axis of rotation (61) on the plate cylinder initially only color support roller (60) between the Aufsetz- and Ab- μ is transferred, since this is then also to the raised position with respect to the plate cylinder (100) not sufficiently wetted with dampening solution cuts. chcn creates in an undesirable manner 2. dampening and inking system according to claim 1, from the USA.-Patent 3,168,038 is exemplary through characterized in that the pivot axis has become known as a dampening device at (21) of the swivel frame (20) of the applicator roller 35 of the dampening (60) that constantly carries the dampening solution at least approximately in the line of agitation caused by the roller when the plate cylinder is lifted of the plate cylinder (100) and the support roller is also detached from this. To the initiation The application of the L-jerking process that is in its set-up position is known in this case roller (60) running tangential plane (Γ1) arrangement, the dampening roller initially arranged on the is. 30 applied roller applied to the bearing, whereby the 3. dampening and inking unit according to claim! run ink layer is covered by the dampening solution, or 2, characterized in that the application roller is then set up under the two rockers (22, 28) of the right maintenance of the system on the dampening roller further Pivot frame (20) a Kuie lever gear (70) pressed against the plate cylinder. Provided by this and that two corresponding sequences are to be achieved that the corresponding lever members (73, 74) which is guaranteed at both dampening of the plate cylinder. Swinging (22, 28) arranged knee jacks- The disadvantage of this, however, is that the constant color drives (70) through an application roller extending across the width of the wafers after the dampening roller fende, in particular with a swivel handle, is applied for as long as the plate cylinder (11, 13) provided clutch avelle ('/ I) must be kept away until the dampening solution is in the other rotatably connected. In the course of the rotational movement of the application roller 4. dampening and inking unit according to claim 3, that the Aufseizlinie has arrived. So here is a die characterized in that automatic emergency drives controlling each toggle lever contact movement (70) a maneuverable application of the application, or the routine of the control roller (60) with regard to the plate cylinder (100) 45 is left to the task of unwanted ink application determining adjusting eccentric (72) and one avoided. However, neither is in the sense of This adjusting eccentric (72) acts as a spring for office-friendly offset printing machines. (30) is provided. The object of the invention is therefore to create 5. dampening and inking unit according to claim 3 of a dampening and inking unit of an office offset or 4, characterized in that the bearing 50 printing machine, which with little construction effort the application roller (60) in associated slots and simple construction a problem-free hand (23) the rocker (22) and in itself at least habitation of the printing press is made possible, with insbeannähernd at right angles to these shooters special the unwanted coloring of not to stretching recesses (24) each a color transfer serving surface parts of the Plat-Schwingc associated holding claws (26) antenzylinders can be excluded with certainty are ordered and that the retaining claws (26) should. the associated rockers (22, 28) for adjustment the position of the applicator roller (60) in relation to the fact that the pivot axis of the Schwenkgeauf the frame-mounted dampening roller (40), steep and defined the axis of rotation of the dampening roller in particular by means of an adjusting eccentric (25), 60 plane, the angular stroke of the axis of rotation of the order can be displaced are attached. roller between their set-up and lift-off position 6. dampening and inking unit according to claim 5, in this respect the plate cylinder cuts. characterized in that in the common by the arrangement according to the invention is before The swivel frame (20) reaches everything on the application roller, since the contact pressure between the (60) and on an upstream inking roller (50) 65 carrying roller and dampening roller in the leveling adjacent distribution roller (55) is mounted and phase of the dampening and inking unit from the plate that the axes of rotation (51,56,61) of these rollers in cylinder lifted application roller comparatively a roller transverse plane a little of the inking of the plate cylinder and with respect to the rotation