DE1611320B - Device for checking the position of the dampening form rollers on offset printing machines - Google Patents

Description

3 4

stronger an output element "pressure adjustment magnet" "pressure adjustment magnet" 17 are fed if control, as well as the device for initiating the Bo- both from the input element »automatic« 2 and When the dampening form rollers are switched off, they are conveyed from the input element “pressure on” 13 via the negator from the input elements »readiness of the machine 14 in the logic element with AND function 15 when the dampening form rollers «and» Automa- 5 are switched off, a signal is sent. For this it is necessary table deletion at feeder shutdown «, which means that the switches are designed so that in the Beüber a common storage element with dominating drive position the input element »automatic« 2 geder Extinguishing effect on what was previously closed in the function chain and on demolition for the point in time "pressure on" the second amplifier, the OR element, the input element “pressure on” 13 is open. If this has an effect, ίο “Automatic” 2 is open, the

The technical means for realizing the switching »pressure adjustment magnet« 17 no signal, and the respective

from an economic point of view, the printing unit is out of the automatic cycle

Select. Outsourced for the realization of the circuit.

comes the relay technology or the structure with electronic On logic element with OR function 4 electronic or pneumatic logic modules (in the case of 15 the control inputs of all printing units, i.e. the Use of pneumatic logic modules is input elements (1; 2; 13) are for each printing unit a corresponding system transmitter is available separately in front of the switch-off. Are there any in shift link) in question. Equivalent switches to automatic printing switched on between these two systems are in the factory (input element »automatic« 2 closed) the Literature indicated. 20 dampening form rollers lifted off (input link

In the following, the invention is to be applied to an execution “dampening form rollers from” 1), so arrives

example are explained in more detail. of the logic element with AND function 3

The accompanying drawing shows a signal flow L signal to the logic element with OR radio image as a schematic representation in which the necessary 4. As a result of the negation by the negator II At the end of the input, logic and output links, the indicator light 12 goes out. On which are included for the different variants. switched off printer or one via the

The prevention of the initiation of the sheet conveying link »automatic« 2 switched on printing unit

When the dampening form rollers are switched off, the dampening rollers then have no input

the actuation of the dampening form roller shut-off lever flows more to the indicator light 12, since the link

and the resulting closing of the input element 30 function element with AND function 3 with an open input

»Dampening form rollers Ab« 1 initiated. The »Automatic« 2 at the output is always on

the printing unit emits the O-signal in the automatic sequence.

Integrated printing machine and thus the target with deliberately turned off dampening form rollers "Automatic" 2 is closed, the initiation of the sheet conveyance is carried out Both signals via the logic element with AND- 35 can be activated by briefly pressing the on function 3, the link with the OR radio link »machine readiness at abgetion 4, the amplifier 5 is fed to the inverter 6. In set dampening form rollers 18 via the memory reversed form, the signal passes on via a member with a dominant extinguishing effect 20, in wel logic circuit with the OR function 7, a comparison of the signal is stored until through stronger8 to a second negator 9. The signal 40 indicates that the feeder has been shut down and that is thus used here again the other way around and comes to original-related actuation of the input link »automatic Form for the feeder setting mechanism on-off quenching when the feeder is set up «19 the signal 10, which is not deleted again when the signal is present, to the output link »Investor activity leaves. Simultaneously with this, the off-setting mechanism on-off «10 goes out via the already geared link "Signal light dampening form rollers On" 45 named links - link with OR-12, because this via the amplifier 5 and the inverter function 7, amplifier 8 and inverter 9, which the 11 receives no signal. Signal reverses - is supplied. This is on

In order to implement the operational variant that the effective path called the output element "feeder control mechanism" can be limited to the required print-on-off, the signal status of activated dampening units and caused by the shutdown of 50 support rollers and thus the initiation of the unneeded printing unit can be coupled, the sheet conveying enables
by unlocking and opening the input element Soll, after the feeder has been switched off, again »automatic« 2 the relevant printing unit is outsourced from the sheet conveying when the automatic dampening cycle is not activated. Initiated by the linking rollers, the insertion element with the AND function 15 can only then be actuated 55 “machine readiness when the signal is switched off via the amplifier 16 to the output element of the dampening form rollers”.

1 sheet of drawings

Claims (1)

Claim: Device to control the position of the dampening form rollers and to block the sheet feed when the dampening form rollers are turned off and to initiate sheet conveyance as required in the case of deliberately turned off dampening form rollers on offset printing machines, in which the printing and the Sheet feed button-controlled adjusting mechanisms, e.g. electromagnets, are provided, characterized in that the device to block the sheet conveyance, which can be restricted to the required printing units and with the means for shutting down printing units that are not required can be coupled from one of the Number of printing units corresponding number η of input links »dampening form roller Ab« (1), »Automatic« (2) and »Pressure On« (13), with the input elements »Fountain form roller From «(1) and» Automatic «(2) via a function chain of« logic elements with AND function (3), a logic element with an OR function (4), a first amplifier (5), an inverter (6), a second OR element (7), a second amplifier (8) and a second Negator (9) on an output link »feeder adjusting mechanism on-off« (10) and via one after the first amplifier (5) arranged third inverter (11) on an output element »indicator light Dampening form roller An "(12) act and the input elements" Pressure On "(13) together with the input elements via a negator (14) »Automatic« (2) via a second AND element (15) and a third amplifier (16) control an output element "pressure adjustment magnet" (17), as well as the device for initiating the Sheet conveyance with the dampening form rollers switched off from the input links »Readiness of the machine with the dampening form rollers switched off "(18) and" Automatic deletion when the feeder is switched off " (19) consists of a common memory element with dominant Extinguishing effect (20) on the OR element in the function chain upstream of the second amplifier (8) (7) acts. The invention relates to a device for controlling the position of the dampening form rollers and for Blocking the sheet conveyance when the dampening form rollers are turned off and for introducing the if necessary Sheet conveyance with deliberately turned off dampening form rollers on offset printing machines, where for switching on and off the pressure and the sheet feed button-controlled adjusting mechanisms, z. B. Electromagnets, are provided. Due to the large number of printing processes in which the dampening form rollers are switched on or off must be, it is not possible to switch the dampening form rollers to the automatic control to include the printing press in a meaningful way; the switching of the dampening form rollers must be done by hand respectively. When setting up a print job, for example on a multi-color machine, the first step is each printing unit made ready for printing, then the respective printing plate with a Provided protective rubber layer and turned off the dampening form rollers. After that, be in the same way the other printing units are made ready for printing so that printing can then begin. To initiate the pressure, the applied protective rubber layer is first removed and then the dampening form rollers turned on. If these operations are carried out properly, the timing chain for the automatic Sequence of the operating processes of the printing machine, such as feeder adjustment, d. H. Sheet conveying, sheet control, Printing, etc. are initiated with the sheet conveyance. The disadvantage here is that the sheet conveyance can also be initiated when the operations have not been carried out properly, for example if on one or more printing units the dampening form rollers have not been turned on. The consequence of this are misprints as well Lost time due to necessary and possibly necessary chemical post-treatment of oxidized Printing plates, which is particularly important in highly productive multi-color machines. The purpose of the invention is therefore to avoid incorrect switching of the dampening form rollers and thus the Better use of highly productive printing presses by eliminating downtime and at the same time an optimal one To guarantee ease of use. The invention is based on the object of a device for controlling the position of the dampening form rollers to create which the initiation of sheet conveyance in the case of improperly employed The dampening form rollers prevent this control on the printing units required for the printing technology Variants such as “trial print”, “each work individually”, “production run to a few works” can be restricted and can be coupled to the means for shutting down the printing unit that is not required is, as well as the initiation of sheet conveyance with deliberately turned off dampening form rollers for the printing technology Variants such as »paper stretching«, »letterset«, »printing of clay surfaces«, »varnish printing« enabled once. This is achieved according to the invention in that the device for blocking the sheet conveyance, which can be restricted to the required printing units and can be coupled to the means for shutting down printing units that are not required, consists of a number η of input elements corresponding to the number of printing units, »dampening form roller Ab«, » Automatic "and" Print On "exist, whereby the input elements" Dampening form roller down "and" Automatic "have a function chain of η logic elements with an and function, a logic element with an or function, a first amplifier, a negator, a second or element , a second amplifier and a second negator act on an output element "feeder adjustment mechanism on-off" and via a third negator arranged after the first amplifier on an output element "signal light dampening form roller An" and the input elements "pressure on" together with the "Automatic" input links via a second AND link and a in the third