EP0047926B2 - Remote control for disconnecting the drives of ink metering elements in rotary printing machines - Google Patents

Description

The invention relates to a control for switching off driven ink metering elements in rotary printing presses from a central remote control station according to the preamble of the claim.

Through an obvious prior use of the company MAN-ROLAND, an electrical control has become known which enables the switching off of ink metering elements in rotary printing presses from a central remote control station. The remote control station has a command button "more" and "less printing ink", a command button "total more, less printing ink" for each ink metering element. A disadvantage of the control, which is obviously used in advance, is that the individual deactivation of individual ink metering elements on different ink fountains of different printing units is not possible. Rather, it is only possible to switch off all ink metering elements of the same position in all ink boxes of the upper and lower inking units for the entire machine. Color metering elements that are switched on in this way then do not follow the command “total additional printing ink”. It is possible to set color dosing elements in optional inking units to "zero" by individual adjustment, so that there is no ink flow at these points in the selected ink fountain. However, if the "Total-More-Ink" button is pressed, the ink metering elements set to "zero" by individual adjustment follow this command. Color metering elements open which should actually remain closed and thus lead to an undesirable color flow. After completion of the command “total additional printing ink”, the ink metering elements which have been opened undesirably have to be individually returned to their zero position. In the period from the start of the undesired opening of the ink metering elements until they reach the zero position, undesired printing ink flows into the inking unit. This leads to a temporary zonal overstaining and thus to paper waste copies.

It is known to control ink metering elements of inking units individually or electrically together from a remote control station. Each time the format width is changed, color zones must be added or removed. be switched off. It is in fact expedient to switch off the ink in the areas of the width of the ink fountain that protrude beyond the format width to be printed, by placing the relevant ink metering elements on the ink fountain roller. Now the case arises that all ink metering elements of a ink fountain together, e.g. Must give 10% more color. This is usually done by pressing a button on the remote control station for a corresponding amount of time, which gives the command for all drives of the ink metering elements to open the ink column by an equal amount, i.e. also for those that are not needed due to the small format, and to open them is harmful. The situation is similar with multi-color rotary printing presses. Because of the uneven ink distribution over the entire format width, not all ink metering elements of all inking units are required and therefore adjusted to the ink fountain roller so that the ink gap is practically zero. The color metering elements are also adjusted when there is a common color increase, so that the operating personnel must individually set the color metering elements that are not required to "color zero" again.

The invention has for its object to provide a device with which color metering elements driven by an electric motor from a remote control station can be shut down in a simple manner in such a way that they are not actuated during total adjustments.

The object is achieved by the subject matter of the characterizing part of the claim.

At a central remote control station, for each color metering element - e.g. 24 pieces for an ink fountain of an inking unit - arranged side by side according to the number of ink metering elements. A “+” button (= “more printing ink”) and a “-” button (= “less printing ink”) are assigned to each ink metering element. There is also a «Format selection» button and, depending on the number of inking units, are e.g. the buttons "Inking unit 1", "Inking unit 2", "Inking unit 3", "Inking unit 4", as well as a total button - more printing ink »(=« + »button) and a total button - less printing ink» (= «- »Button) is provided. The buttons are connected to a microcomuter system, which issues control commands to electronic counters and control cards that serve as control units for the stepper motors, each of which drives the ink metering elements via a gear.

Should e.g. Ink metering element No. 17 of the inking unit 2 execute an adjustment path in the direction of "more printing ink", so the inking unit 2 is selected via the inking unit 2 button and the "+" button for the ink metering element No. 17 is pressed. The stepper motor adjusts the selected color metering element No. 17 in accordance with the actuation time of the "+" button. The same procedure is followed when a color metering element is selected in the "Less color" direction by pressing the corresponding "-" button. Each position of the color metering element is stored in an electronic memory so that it can be called up and displayed when selected on an optical display at the remote control station.

If the format is to be changed in width, the «Format selection» button and the «Inking unit 1», «Inking unit 2» and, if it is a four-color press, also the Inking unit 3 »button and «inking unit 4» actuated. By pressing the "Format selection" and "Inking unit 1" to "Inking unit 4" buttons, you can save the inks for which the format is to be changed. Then press the «-» buttons on the ink metering elements that are not required for the format currently being printed. With this command, the corresponding stepper motors move the ink metering elements concerned into a zero position to the ink fountain roller assigned to them, ie the ink supply in the inking unit is switched off in these ink zone areas. If you want to change from a narrower format width to a wider one, you have to press the corresponding «+» key. The affected stepper motors bring their ink metering elements to the ink fountain roller in preselectable positions. Once the format selection has been completed, the «Format selection» button is pressed again. The format selection is then saved in the microcomputer. If you now press the button «Total - More printing ink» (= «Total- +») or «Total - Less printing ink» (= Total- - »), only all the color metering elements that are assigned to the set format - that is, active - are dosed according to The operating time of the button is adjusted together in the preselected direction («+» or «-») by the same amount.

Claims (1)

1. A control mechanism to disable driven ink metering elements in rotary printing machines from a central remote control place, these ink metering elements cooperating with an ink fountain roller, at the remote control place there is arranged a command push button "Reduce Ink" and a command push button "Increase Ink" for each ink metering element, a command push button "Inking unit" for each inking unit for inking unit selection, a command push button "Joint - Reduce Ink" and a command push button "Joint - Increase Ink", characterized in that there is provided a command push button "Select Size", that these command push buttons "Reduce Ink", "Increase Ink", Inking Unit, "Select Size", "Joint - Reduce Ink", "Joint-Increase Ink" are in connection with a program-controllable micro computer system, that the micro computer system is capable of being programmed in such way that after operating a command push button "Select Size" and subsequently operating a command push button "Reduce Ink" for an inking unit preselected through a command push button "Inking Unit" and after operating a command push button "Select Size" for storing a termination of "Select Size" into the micro computer system, the correspondingly selected ink metering elements are disposed capable of being moved - beginning from the operation of the command push button "Reduce Ink" up to the effect of a manually released control command to the micro computer systeminto a zero position with respect to the ink fountain roller, and capable of being rendered inactive, that ink metering elements moved in this way into a zero position remain inactive with respect to the control commands "Increase Ink", "Reduce Ink", "Joint - Increase Ink", and "Joint - Reduce Ink" up to the neutralization of the control command "Select Size".