DE2132850A1 - Rotary offset printing machine unit - Google Patents

Description

fr ,. _Π .: _{Ι; Τ7}

η 22, Steinsdorfstr. TO

310-17.236PC17.237H) 1.7.1971

CREUSOT-LOIRE, Paris (France)

Tiotationsof f set printing machine unit

The invention relates to a rotary offset printing machine unit, in particular a blanket-blanket double unit including as an integrated block Lich a device for automatic gluing is formed to a modular design of rotary offset printing machines to allow for multiple sheets or multiple colors.

The rotary offset printing machines for z. B. Magazines generally have several printing stations arranged in a row. In conventional machines, the unwinding stations for unwinding the paper supply rolls are arranged at the end of the row, the paper webs being distributed to the various printing units by sets of rollers. With other machines, which are also common, the stations for unwinding

31O- (7O / 3H) -Hd-r (7) West

109882/0199

none of the paper supply rolls on a floor below the printing units are arranged so that it is easier to assign an unwinding station directly to a printing station. In this case it is also easier to use an automatic unwinding station for the paper supply rolls Equip gluing device, z. B. in "shamrock shape", resulting in an increase in the overall performance of the printing machine guaranteed.

However, all these known printing machines have the disadvantage that their overall space requirements are large, that the paper webs have to cover long distances and, above all, that they are very poorly suited for increasing the printing output of the printing machine by later adding further printing units. Although printing units can be produced that have a paper supply roll carrier, the entire machine must then be stopped during each supply roll change.

It is therefore the object of the invention to provide a complete rotary offset printing machine unit while avoiding the disadvantages mentioned specify which makes it possible to simply string together any number of such Units to form a printing machine with variable capacity of the number of sheets and a continuous one To guarantee operation without waiting time when changing the supply roll.

This object is achieved according to the invention in that the rotary offset printing machine unit is in one and has the same group of interconnected racks:

109882/0199

an upper station with two printing units, the blanket cylinders of which are opposite each other and which are vertically offset from one another, the flow plane of the printing material web between the two blanket cylinders forming an angle of approximately kf> with the horizontal;

a lower station carrying supply rolls with a ninri rhtiin ;: for the continuous transport of the supply roll between a position for entering a full supply roll under the higher-lying printing unit and a ή

uer position for the dispensing of an empty supply roll below the lower-lying printing unit;

a device through which the full supply roll is set in rotation: unvi

a pivotable arm for gluing, which is provided with egg ner device for cutting through the web of printing material.

Dj ο ^ ri'indun ^ is explained in more detail using the drawing, in the single figure a longitudinal section of an embodiment game of invention; Corresponding rotary offset printing machine unit is shown, the longitudinal section being ex-follows along the inside of a side frame.

The illustrated embodiment of the rotary offset printing machine unit has side frames, the respective are formed by an upper frame 1 and a lower frame 2 secured thereto, the side frames are connected by various cross struts 3.

109882/0199

The upper frames 1 hold the actual printing works, which are arranged opposite one another, in order to enable a straight-back printing of the paper web that runs between the two printing blankets. Each printing unit has in the usual way a blanket cylinder 5, a forme cylinder 6, several inking rollers between an ink pan 7 and the forme cylinder 6 and several dampening rollers between a trough P and the forme cylinder - linder 5 forms an angle of 45 with the horizontal plane, and the movement direction of a paper web 9 between the blanketsz3 '"alleviate 5 is also inclined by k5 to the horizontal. The entirety of the Z and rollers is essentially symmetrical to the plane of passage of the paper web It goes without saying that each printing unit has the usual control and regulating devices known per se for an offset printing machine, so that they do not need to be mentioned here a first deflecting roller 10, a tension control roller 11 and a second deflecting roller 12 runs, as in the solid line in FIG r is shown. In the case of multicolor printing, the paper web 9 can also come from another printing station of the machine with contact with a third deflection roller 13.

The lower frames 2 carry a supply roll holder, which enables the positioning of a full roll large diameter in standby position allowed if the previous supply roll has been unwound to a sufficiently small diameter. The supply roll holder has on each side and near the interior

109882/0199

surface of each underframe 1 is an endless chain 15, which carries three holders 16 of supply roller mandrels, which are equidistantly advantageous on the chain 15 concerned, with one of the holders on one chain 15 opposite a holder on the other chain 15. Each endless chain 15 runs around a deflection sprocket 17 and around a "nfcriebskettenrad 18. Each drive sprocket 13 is in turn driven by another chain 19 via a pinion 2 <~>". The two pinions 20 · are wedged on one and the same transverse shaft 21 ', which can be manually or motorized

is driven by what is parallel and synchronized Movement of the two = endless chains 15 guaranteed.

Each supply roll 20 or 21 is mounted on a supply roll bar 22 or 23, which is attached to a brake disc Zh or 25, respectively. The brake disks 2k and 25 are in engagement with any known brake device, and the Vorr? tsr oil 1 erulorne 22 and 23 are also connected to a conventional [device for transverse control of the game '.

^{An arm - J} - S hinged to a pin 29 on the lower frame 2 carries a driving roller 30 which is connected via a switchable progressive coupling (not shown) to a kinematic chain for the general drive of the rotary offset printing machine. The transmission ratio for the drive device is such that, when the slip of the clutch is practically zero, the peripheral speed of the roller 30 is equal to the peripheral speed of the blanket cylinder 5 and thus equal to the linear speed of the paper web 9. Any

109882/0199

Facility (not shown for the sake of simplicity) a pivoting of the arm 28 about its pin and thus a placement of the roll 30 on the supply roll

At the level of the lower part of the upper frame 1, a loose roller 32 is mounted at the end of two arms 33 which are each articulated to one of the upper frames 1 via a pin "} h and are held parallel by a transverse axis. One (not shown ) The device enables the two arms 3 ^ to pivot about their pins 3 ^ in contact with the supply roll 20. A toothed member 35 is carried at each of its two ends by an angle lever 36 which is hinged to the end of each arm 33. A stop 37 that can be swiveled away »Which is hinged to the frame 1 via a pin 3 ^! And can be controlled by a handle 39, can be pivoted in contact with one of the arms of the lever arm or away from it.

The previous description of the exemplary embodiment of the rotary offset printing machine unit according to the invention shows that this actually overcomes the disadvantages of the known prior art described above. It can be seen that the Rotationsoff according to the invention set printing machine unit representing a block Forms a unit that is fully integrated because they are in the same general frame at the same time has its own station for unwinding the supply rolls and a blanket-blanket double printing unit, which does the straight-back printing the paper web unwound from the supply roll guaranteed. This integrated unit can be installed in an already existing printing machine of the same type, for which it is only necessary to correctly to anchor in the ground and to the output of the paper web

109882/0199

to be connected to the end folding machine.

In addition, the rotary offset .irunkraaFcliineneinheit according to the invention Operating services that are similar to those of complicated machines with separate supply roll holders are comparable. Indeed, despite its compactness, it has a device for continuous transport dor supply rolls that allow the positioning of a full supply roll in standby position and through automatic gluing, the supply roll change without stopping the printing j machine allowed.

When a supply roll has been reduced in diameter to a sufficiently small vert during unwinding is, it is by actuating the cross shaft 21 'and of the chains 15 brought into the position of the supply roll 21 shown in the figure. During the transport, which is continuously, d. H. can be carried out jerk-free but also with intermittent stopping, d. H. without influence on the tension of the unwound web, you can put a new full supply roll with a large diameter on the Place the other two holders 16 that are aligned on the two chains 15. If the supply roll is unwinding the ^ Has taken position of the supply roll 21, the new, full supply roll is in the ready position of the supply roll 20 has been brought. The automatic gluing is performed continuously as the supply roll 21 approaches the end of its unwinding. The first phase this process consists in applying the friction roller 30 to the circumference of the supply roller 20, the end of which beforehand pointed, smeared with glue and held in place by a piece of tape.

109882/0199

2Ί32850

The supply roll 20 increases in speed until it reaches a peripheral speed which is equal to the linear speed of the paper web 9. IDs then grooved to adjust the loose roller 32, over which the paper web Q is already running, so that it lies against the circumferential winding of the supply roll 20, which is now glued to the paper web 9 by stripping off the adhesive strip so that now the two Paper webs are driven together to pass between the two blanket cylinders 5. Simultaneously with the actuation of the loose roller 12 or by some other actuation, actuation of the stop 37 allows the hinged angle lever 36 to pivot and the toothed member 35 to engage in the paper web coming from the supply roll 21. The paper web 9 is then only supplied from the supply roll 20. The driving roll "} 0 is now swiveled away from the supply roll 20 so that its unwinding is continued by simply pulling the paper web 9.

As soon as the supply roll 20 has been unwound to a sufficiently small diameter, it can in turn brought into the end unwinding division according to the supply roll 21 at the same time a new, full supply roll is positioned in the ready position.

It goes without saying that all of these processes are also perfect automatically by measuring the residual throughput the supply roll can be carried out during unwinding, e.g. B. by means of a probe or button.

It can be seen that the implementation of the compact homogeneous rotary offset printing device according to the invention

1098 8 2/0199

machine unit with one direction for automatic gluing only through the special attachment; of the two upper printing units can be achieved. The mutual arrangement of the two printing units at an angle of k5 and the inclined passage of the paper web 9 between the printing blanket cylinders 5 then allows a zone of less height to be provided in the lower part to accommodate the full supply roll provided, as well as a zone of lower height, but which is sufficient to accommodate the supply roll at the end of unwinding. M.

The embodiment described here according to FIG ['rfinduiv; can of course various modifications Experienced. Although the description is based on the printing of a paper web, webs can also be used atis other materials, e.g. B. textiles or plastic, be used. In this case, however, the coloring or the separation of the web must be carried out after the gluing be modified accordingly.

109882/0199

Claims (2)

Claims 1J rotary offset printing machine unit, thereby characterized in that they are in one and the same group of interconnected racks (1; 2; 3) has: an upper station with two printing units, whose blanket cylinders (5; 5) are opposite each other and which are offset from one another in ^{the plane 1} , the passage plane of the printing substrate web (°) between the two blanket cylinders (5) at an angle of approximately k-3 with the Horizontal forms; a lower station carrying supply rolls with a device for the continuous transport of the supply roll zwisexhen a position for entering a full supply roll (20) under the higher-lying printing unit and a position for outputting an empty supply roll (21) under the lower-lying printing unit; a facility (28, 29, 3 ^) through which the full The supply roll (20) is set in rotation; and a pivotable arm (33) for gluing, which is provided with a device (35) for cutting through the web of printing material (9) provided i ^ t. 2. Rotary offset printing machine unit according to claim 1, characterized in that the device for the continuous transport of the pre- 109882/0199 advice roll two parallel, lateral, endless chains (15) which are driven synchronously and each carry at least two holders (16) of supply roll mandrels (22; 23), where dde holders are arranged equidistantly on each chain are and each with one of the holders atif the other Chain align, and that the linear distance between two Hornrti'ven Hai learn equal to the distance on each chain ■ / wipe rlpr supply roll (20) in the input position uii'l the supply roll (21) in the output position of the Rotati onsof fsetdruckmascliineneinheit is. 109882/0199 A% Blank page