JP3073351B2 - Apparatus for adjusting ink and fountain solution in a printing unit of an offset printing press for each zone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used in a printing press in which the film thickness profile of the ink and / or fountain solution in the printing unit is adjusted remotely.

[0002]

2. Description of the Related Art West German Patent Publication No. 3147312A1
The publication describes a regulating device of a printing press having a number of actuators for regulating the film thickness profile of the ink and / or the fountain solution and / or a control device for registration. A display cooperating with the light pen is provided on the controller for inputting data and / or instructions. In the display, the ink and dampening solution zones are assigned columns consisting of a few light emitting diodes. These columns have a matrix arrangement on the display unit as a whole. By moving the light pen horizontally on the display column,
The specified values for the adjusting elements of the inking device, dampening device or register device can be entered into the control device manually according to the printed image. In this case, the target or actual positions of all the adjustment elements can be identified by the light emission of the light-emitting diodes used for the display.

In one configuration of this device, current pulses are sent to the light emitting diodes in a predetermined order. Light emitting diodes that do not activate the display are sent short current pulses so that they appear to be either non-luminous or very weakly luminous to the naked eye. In contrast, the light emitting diode that activates the display receives a relatively long current pulse that looks brighter to the naked eye. Brightly emitting diodes receive short pulses in addition to long pulses. At that time, the light pen is effectively connected only for a short pulse time. To display different information, the light emitting diodes can be energized to have different emission times for different information, for example, to indicate different information by blinking.

[0004]

The disadvantage of this solution is that the same wavelength of light is used for indicating and adjusting the position of the adjusting element with respect to the ink, dampening solution or register. Therefore, if the operator performing the adjustment and reading does not recognize the correct position of the display changeover switch at the same time, there is a risk of erroneous adjustment. At first glance, the operator cannot confirm that the position of the ink profile adjusting means is displayed, for example, and needs to check the display changeover switch. The display and adjustment of the position of the ink, the fountain solution or the adjusting element of the register must be called up sequentially by means of a display changeover switch, which impairs the handling of the adjusting device.

[0005] When displaying various information with different light emission times, the risk of reading and adjustment errors is reduced,
The cost to excite the light emitting diode is greater,
For easy reading and adjustment, a continuously displaying light emitting diode may be more convenient.

An object of the present invention is to reduce the risk of misadjustment,
It is an object of the present invention to provide a device for zoned adjustment of ink and dampening solution which improves the handleability for the operator at a lower cost.

[0007]

The essence of the present invention is that the light emitting element of the display unit of the control device emits light of two wavelengths that can be visually identified, and the first is used for indicating the amount of ink. The point is that the wavelength is switched to the second wavelength for indicating the dampening solution amount.

[0008] This reduces the risk of mixing for the operator. This is because the operator can easily identify the assignment of the color display to the adjusting means. For example, a red indication may represent the location of the ink profile adjuster and a green indication may represent the location of the fountain solution regulator.

In another embodiment of the invention, in addition to the two main display colors, one or more additional sub-display colors can be transmitted from the light-emitting element by the light-emitting means. For example, a yellow display may be used to indicate adjustment of the peripheral direction register. This need not necessarily be done for all columns of the display.

A display having light of various wavelengths can be continuous or intermittent, wherein a plurality of colors can be displayed simultaneously. One possibility is that light of a predetermined wavelength can be transmitted intermittently, and that light of a wavelength not used for display can be transmitted by an integrated light beam that is substantially below the threshold value of the visibility of the naked eye. in this case,
It would be an advantage that the operating wavelength of the light pen was adapted to the wavelength of one display color. By design, the light-emitting elements are expediently formed as multicolor light-emitting diodes.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

According to FIG. 1, the device according to the invention comprises an ink control element 2.1, 2.2, a fountain control element 3.1, of a printing press 5 having two printing units 6.1, 6.2. 3.
2 and the control device 1 which is connected to the register adjustment elements 4.1, 4.2.

The control device 1 is provided with a light pen 7 and a plurality of columns arranged in a row and composed of a small number of two-color LEDs 9. The number of columns 8 corresponds to the number of adjustable ink or dampening fluid zones evenly arranged over the width of the printed image. Individual printing units 6.1,
In order to adjust the ink and fountain solution profiles in 6.2, the print master 10 corresponds to the column 8 in the control device 1. Further, the control device 1 includes an address memory logic circuit 11, to which the light pen 7 is connected. An output of the address memory logic circuit 11 is connected to an input of the address data memory 12. The address data memory 12 is connected to the computer 13. The LED excitation logic circuit 14 is connected to another input of the address data memory 12 and the board selection logic circuit 15. Further, the LED excitation logic circuit 14 and the board selection logic circuit 15 are provided with an ink / fountain solution selection switch 16
Is connected to FIG. 1 shows, as a detail X, several two-color LEDs 9 in a column 8. According to this configuration, the red light substrate 17 is arranged on the axis of symmetry 18 of the column 8, and the green light substrate 19 is arranged laterally shifted from the axis of symmetry 18.

With this arrangement, zone-by-zone adjustment of ink and dampening solution can be performed as follows. The display of the ink amount for each zone is performed with red light, and the display of the fountain solution amount for each zone is performed with green light. This can be adjusted with the ink / fountain solution selection switch. In this embodiment, only the adjustment of the ink amount or the adjustment of the dampening solution can be displayed. The red light substrate 17 of the two-color LED 9 can be excited according to the time graph shown in FIG. Time t _LG
During which the light pen 7 is interrogated, followed by a time t _FAZ for possible fine display. During a time t _GAZ that is twice as long as t _LG and t _FAZ , a coarse display of the adjustment values for the ink zone adjustment elements 2.1 and 2.2 takes place.

To adjust the amount of fountain solution indicated by green light, the ink / fountain solution select switch 16 is turned to the second position. The operating wavelength of the light receiver provided on the light pen 7 matches the wavelength of the red light substrate 17 and is insensitive to the spectral range of the green light substrate 19.

In order to adjust the amount of dampening water, two substrates 17
And 19 are excited. Red light substrate 1 during time t _LG
7 is excited and the light pen 7 detects the red light pulse. However, these red light pulses are created by an integrated beam that is invisible or only slightly visible to the naked eye. However, during times t _FAZ and t _GAZ , green light substrate 1
9 is excited so that it can be visually perceived well. Therefore, the light pen 7 needs to be sensitive to only one color, even when displaying two colors. This is advantageous when trying to switch the existing monochrome adjustment device to a multi-color adjustment operation.

An address memory logic circuit 11 provided in the control device 1 receives a signal pulse of the light pen 7. These signal pulses are amplified and filtered. The light pen pulse depends on the excitation time (FIG. 2) and is transmitted to the address data memory 12 as a storage pulse. The address data memory 12 is connected to the LED excitation logic circuit 14 via a one-way data bus and a two-way data bus. A control signal for managing the dual port RAM in the address data memory 12 is used via the unidirectional data bus. This one-way data bus includes an address bus for the selected column. The bidirectional data bus is connected to the selected L
This is a data bus for the ED column. By means of the LED excitation logic circuit 14, depending on the excitation time (FIG. 2), one drive stage of the substrates 17 and 19 is released and excited. For this purpose, the LED excitation logic circuit 14 is connected to the substrate selection stage 15. The computer 13 processes the data relating to the ink or fountain solution zone in the address storage device and generates signals for adjusting the ink or fountain solution film thickness profile. In addition, the computer 13 can receive ink or dampening zone data, which are retrieved from a peripheral device (not shown) and transferred to the address storage device 12.

The arrangement of the two adjacent LEDs 9 is chosen such that the light cones of the substrate 17 do not overlap during the time t _LG . By disposing the red light substrate 17 at the center of the two-color LED 9, scattering of the detected red light is suppressed to a small level. Another possibility to keep scattering low is to construct specially shaped LED lenses or LED reflectors. Since the element that senses green light is not used to control the light pen, the scattering of green light is less important, and the green light substrate 19 can be eccentrically located.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an arrangement configuration according to the present invention.

FIG. 2 is a time graph used in the present invention.

[Explanation of symbols]

1 Controller 2.1, 2.2, 3.1, 3.2, 4.1, 4.2
Adjusting element 5 Printing machine 6.1, 6.2 Printing unit 7 Light pen 8 Column 9 Two-color LED 10 Printing original drawing 11 Address memory logic circuit 12 Address data memory 13 Computer 14 LED excitation logic circuit 15 Board selection logic circuit 16 Ink / Dampening solution selection switch 17, 19 Substrate 18 Symmetry axis

Continuation of the front page (73) Patent holder 390009232 Kurfuersten-Anlage 52-60, Heidelberg, Federal Republic of Germany (56) References JP-A-58-108146 (JP, A) JP-A-55-12495 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B41F 33/10 B41F 33/00 B41F 33/02

Claims (3)

(57) [Claims] 1. A remotely operated, acts on each zone consists regulatory elements of the amount of supplied Ru ink and dampening water in a printing unit, further, connected to the adjustment element, a display unit and a light pen A column composed of a small number of light emitting elements is assigned to each of the individual ink and dampening solution zones in the display unit, and the light pen moves in the horizontal or vertical direction on the column. are possible, the emission by the light pen to the
An apparatus for adjusting the ink and dampening water to each zone in the printing unit of an offset printing machine which can be adjusted and displayed together amounts of ink and dampening water for each zone on the printing image by interaction with the elements, light emitting elements ( 9) emits light of two wavelengths that can be visually identified, and is switched to the first wavelength for displaying the amount of ink, and to the second wavelength for displaying the amount of dampening solution.
(7) the operating wavelength matches one of two wavelengths.
And wherein the that. 2. The arrangement according to claim 1, wherein light can be transmitted intermittently, and light having a wavelength not used for display can be transmitted by an integrated light beam substantially lower than a threshold value of the visibility of the naked eye. 3. The arrangement according to claim 1, wherein the light-emitting elements are formed as two-color LEDs (9).