GB2140353A - A method of and apparatus for controlling a printing ink supply - Google Patents
A method of and apparatus for controlling a printing ink supply Download PDFInfo
- Publication number
- GB2140353A GB2140353A GB08412962A GB8412962A GB2140353A GB 2140353 A GB2140353 A GB 2140353A GB 08412962 A GB08412962 A GB 08412962A GB 8412962 A GB8412962 A GB 8412962A GB 2140353 A GB2140353 A GB 2140353A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ink
- printing
- printing region
- image area
- proportion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012937 correction Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 9
- 238000005070 sampling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
- B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
- B41F31/045—Remote control of the duct keys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
A method of and apparatus for controlling a printing ink supply to each printing region (Ai) of a printing plate (10) in which the proportion of the area of each printing region (Ai) taken up by an image is measured and is corrected using the measured image area proportion of the said printing area (Ai) for which ink supply quantity is to be set and the measured image area proportion of at least one printing region (Ai + 1, Ai - I) adjacent the said printing region (Ai), and the quantity of ink supplied from an ink fountain (Fi) associated with the said printing region (Ai) is controlled in accordance with the corrected measured image area proportion of the said printing region (Ai). Alternatively, the correction may be performed on ink amount values derived from the image area values. <IMAGE>
Description
SPECIFICATION
A method of and apparatus for controlling a printing ink supply
This invention relates to a method of and apparatus for controlling a printing ink supply.
Printing machines, for example, offset lithographic presses of multiblade type, are provided
with a plurality of ink keys, hereinafter referred to as "ink fountains," arranged equally spaced
in a row extending in a direction perpendicular to the direction in which the printing plate is
rotatable, and it is necessary to adjust the quantity of ink supplied by each ink fountain so that the quantity of ink supplied is sufficient to enable good printing of the image, for example the
picture or pattern, on the printing plate throughout the printing operation.
Previously, the quantity of ink supplied to each ink fountain has been set manuaily by the
operator of the printing press on the basis of his experience and then adjusted by trial and error
according to the results of the printing. Accordingly, it may take a long time to obtain an
impression and wastage of both ink and paper is unavoidable before obtaining a stable printing
result.
For example, the percentage or proportion of the area of a printing region taken up by an
image or part of an image, which percentage or proportion will hereinafter be referred to as the
"image area proportion", changes sharply or fluctuates between printing areas such as those shown in Fig. 1 of the accompanying drawings. That is, where the image area proportion of the
ith printing region on the printing plate is 90% and the image area proportion of the adjacent
printing regions i - 1 and i + 1 are each 50%, the setting for the quantity of ink to be supplied to each ink fountain is made faithfully proportional to the image area proportions.In such a case, problems are caused because the concentration of ink will be lowered at both ends of the printing region i whose image area proportion is 90%, because the adjacent printing regions have an image area proportion of only 50, so that a high concentration of ink is not supplied evenly to the whole region. The results of the printing are therefore adversely affected by uneven printing in the adjacent region since the supplied ink is spread in the transverse direction by the vibration roller of the inking device.
It is an object of the present invention to provide a method of controlling a printing ink supply which overcomes or at least mitigates the disadvantages of such previous methods.
According to one aspect of the present invention there is provided a method of controlling the supply of ink to a printing region of a printing plate, comprising measuring the proportion of the area of each printing region taken up by an image, correcting the measured image area proportion of a printing region in dependence on the measured image area proportion of the said printing region and the measured image area proportion of at least one printing region adjacent to the said printing region, and controlling the supply of ink to the said printing region in accordance with the corrected measured image area proportion thereof.
In a second aspect, the present invention provides a method of controlling the supply of ink to a printing region of a printing plate, comprising measuring the proportion of the area of each printing plate occupied by an image, determining the quantity of ink to be supplied to a respective ink fountain associated with each printing region directly from the measured image area proportion of the printing region, correcting the determined quantity to be supplied to an ink fountain in dependence upon the determined quantity of ink for that ink fountain and the determined quantity of ink for at least one ink fountain adjacent to the said ink fountain, and controlling the supply of ink to the said fountain in accordance with the said corrected determined quantity.
In a third aspect, the present invention provides apparatus for controlling the supply of ink to a printing region of a printing plate, comprising means for measuring the proportion of the area of each printing region taken up by an image, means for correcting the measured image area proportion of a printing region in dependence on the measured image area proportion of the said printing region and the measured image area proportion of at least one printing region adjacent to the said printing region, and means for controlling the supply of ink to the said printing region in accordance with the corrected measured image area proportion thereof.
In a fourth aspect, the present invention provides apparatus for controlling the supply of ink to a printing region of a printing plate, comprising means for measuring the proportion of the area of each printing plate occupied by an image, means for determining the quantity of ink to be supplied to a respective ink fountain associated with each printing region directly from the measured image area proportion of the printing region, means for correcting the determined quantity of ink to be supplied to an ink fountain in dependence upon the determined quantity of ink for that ink fountain and the determined quantity of one ink for at least one ink fountain adjacent to the said ink fountain, and means for controlling the supply of ink to the said fountain in accordance with the corrected determined quantity.
The present invention also provides a printing press comprising a printing plate having a plurality of stip-like printing regions arranged parallel to one another and to a direction in which the printing plate is movable and a plurality of ink fountains each arranged adjacent a respective printing region, the printing press incorporating apparatus in accordance with the third or fourth aspect.
For a better understanding of the present invention, and to show how the same may be put into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is a schematic top plan view showing printing areas on a printing plate and associated ink fountains;
Figure 2 is a perspective view of a scanning head of a device for measuring the image area proportion in each printing region;
Figure 3 is a block diagram of apparatus for processing signals from the scanning head; and
Figure 4 is an enlarged view of part of the printing plate of Fig. 1.
Referring now to the drawings, Fig. 1 illustrates a schematic top view plan of the printing areas on a printing plate and the corresponding ink fountains of a printing press. In this embodiment, the printing press is provided with thirty-two ink fountains F1 to F32 arranged in a row. The printing regions Al to A32 are in the form of strips of equal width extending parallel to the direction (indicated by the arrow Y in Fig. 2) in which the printing plate 10 is rotatable.
The ink fountains F1 to F32 are arranged in a row facing the printing regions, the row extending perpendicularly of the direction in which the printing plate 10 is rotatable, that is, the row extends in the direction X shown in Fig. 2.
Fig. 2 illustrates a schematic perspective view of a printing area measuring device for measuring the proportion of the area of each printing region occupied by an image or part of an image, that is the image area proportion, while Fig. 3 illustrates a block diagram of signal processing apparatus of the printing area measuring device. In this respect, the description of the structure of printing area measuring device is detailed, for example, in the Applicants
Published U.K. Patent Application Publication No. 211 8298A (corresponding to Japanese
Patent Application No. 57556760). Therefore, only the signal processing of the printing area measuring device is outlined herein.
A scanning head 20 is provided with light sources 21 such as light emitting diodes (LEDS) for illuminating the printing plate, a field stop 22 and light receiving elements 23-1,23-2,23-32.
The field stop 22 is in the form of masking plates which provide a slit through which light reflected from the printing plate may pass to reach the light receiving elements. The field stop 22 also shields the light receiving elements from the light emitted directly from the light sources 21. The scanning head 20 is movable on the printing plate in the direction of the arrow X so as to be able to measure the image area proportion of each printing area Al to A32.
The processing of the signals from the printing area measuring device will now be described with reference to the Fig. 3.
When light from the light sources 21 reflected from the printing plate is received by a light receiving element 23-1,23-2,...23-32, the light receiving element outputs a voltage corresponding to the quantity of light incident on the light receiving element. The output voltages of the light receiving elements are sampled at a specific rate and stored in respective sample and hold circuits 24-1, 24-2,. .24-32 in accordance with the instructions from a central processing (CPU) 27. Under instructions from the CPU 27, the signals stored in the sample and hold circuits 24-1 to 24-32 are multiplexed by a multiplexer 25 and converted into digital signals by an analogue-to-digital (A/D) converter 26. The digital signals corresponding to the output voltages are written one after another into a specific address of a memory 28.Thus, while the scanning head 20 is still scanning the same printing area or strip area, the digital data corresponding to the outputs of all of the light receiving elements are written into the same address of the memory one after another so that the memory 28 contains a summation of the digital data produced from the light receiving element outputs when the scanning head is scanning a particular printing area. When the scanning head moves to the next printing region, the CPU 27 causes the digital data received for that printing strip to be stored in the next memory address.
The proportion of the area of each printing region or strip Al to A32 occupied by an image or part of an image, that is the image area proportion, on the printing plate 10 is thus given as output data from the CPU 27. The image area ratio for each printing area or strip is corrected or modified using the image area proportion of the adjacent region so as to ensure an adequate supply of ink depending on the change in the image area proportion between regions or strips
Al to A32. To set the quantity of ink supply for the ink fountain Fi corresponding to the ith printing area or strip Ai, for example, the imagen area proportion of an image portion X(i) in the printing area or strip Ai and also the image area proportion of image portions X(i - 1) and
X(i + 1) of the adjacent printing regions or strips A(i - 1), A( + 1) are respectively corrected or adjusted depending on each printing condition to set the quantity of ink in the fountain which should be supplied to the specific region Ai which quantity is thereinafter called the "ink fountain value".In other words, the corrected image area proportion or ratio X(i) of the ith printing region Ai is provided by a processing circuit 29 which carries out the following computation on the data supplied thereto from the memory 28 via the CPU 27: (i)= b.X(i - 1)+ a.X(i)+ c.X(i . . .(1) where a, b and c are weighting coefficients and a + b + c = 1,a'b,c'O are desirable conditions.
The corrected area ratio X (i) is displayed on a visual display unit 30, such as a cathode ray tube (CRT), and each ink fountain is directly adjusted in accordance with the data output from the processing circuit 29.
In equation (1), the weighting coefficients a, b and c are determined by the conditions of printing press and of printing and are easily calculated by analysis of the behaviour of ink transfer and through multiple regression analysis using the image area proportion as the descriptive variable and the ink fountain value to be set as the objective variable.
Since the correction carried out by the processing circuit 29 is performed to control the sharp or abrupt changes in ink supply quantity to the printing region to be within the allowable range so as to enable high fidelity printing, the weighting coefficients may also be obtained by the following computation, that is, by adding the image area proportions X(i-2) and X(i + 2) in other adjacent printing areas A(i - 2) and A(i + 2), respectively, together with the image area proportions X(i - 1) and X(i + 1) of the adjacent regions A(i + I) and A(i + I), to the specific printing area Ai so that: X(i)=d.X(i-2)+b.X(i- 1)+a.X(i)+c.X(i+ 1)+ e.X(i + 2) where a, b, c, d and e are weighting coefficients and a + b + c + d + e = 1,a~b,c~d,e~O are desirable conditions.
When, as shown in Fig. 4, the scanning head 20 performs ten scans across each printing area or strip to measure the image area proportion or ratio in the printing region, it may also be possible to determineg the area ratio occuppied by the image portion in one adjacent region
A(i - 1) from the sampling values of, that is the data determined from, the 6th to the 1 0th scanning areas or strips S6 to S10 of the printing area or strip A, and that of the other adjacent region A(i + 1) from the sampling values of the 1st to the 5th scanning area S1-S5 of the printing area Ai and then to use the area ratio occupied by the image portion in each of adjacent regions A(i - 1), A(i + 1) thus obtained in Equation (1).In this case, it is desirable to correct each image area proportion using the sampling values of the scanning areas of at least 1/3 of each adjacent printing area so as to obtain preferred printing results.
For the correction of the image area proportions of ratios X1, X32 in the end printing areas or strips Al, A32 on the printing plate 10, it is sufficient to use the following equations, equations 3 and 4, to obtain the corrected value, the image area ratios of the imaginary or non-existent image portions X(O) and X(33) corresponding to the non-existent regions AO and A33, respectively, being taken as 0%.
X=a.X(1)+c.X(2).. ..(3) and
X(32) = b.X(31) + a.X(32).. ..(4) Alternatively, the following calculation can be applied to correct the image areas proportion or percentage of the aforementioned end printing regions Al and A32, if the image area percentages or proportion of the printing regions or strips AO and A32 are taken to be approximately equal to the image area percentages or proportions of the printing regions Al and
A32 to be corrected.
X(1)=b.X(1)+a.(1)+c.X(2).. ..(5) and
X(32) = b.X(31) + a.X(32) + c.X(32)... ..(6) Thus, it becomes possible to supply an adequate quantity of ink to each printing region by setting the ink fountain value from the corrected image area proportion of each printing region determined as described above.
As described above, the value for the image area percentage or proportion of a printing area obtained by the printing area measuring device is corrected, the change in the image area proportion between printing regions being averaged depending on the image area proportion in each printing region and within the allowable range to determine the corrected area ratio of each printing region, and thus the quantity of ink required by each ink fountain is determined from the corrected image area proportion.
It should, of course, be understood, that a method for the quantity of ink to be supplied to each ink fountain may, alternatively, be determined directly from the measured image area percentage or proportion of the associated printing region using the printing area measuring device and then the determined ink quantity corrected in dependence upon the determined ink quantities for adjacent ink fountains in a manner similar to that described above for correcting the image area proportions of the printing regions.
Thus, a method of controlling a printing ink supply is provided which enables quick and exact initial setting or initialization of ink fountains and ensures favourable printing results.
Moreover, the method described allows the average quantity of ink supplied to the ink fountains to be set within the allowable range according to changes in the image area proportion of each of the printing regions even when printing areas with greatly differing image area proportions are placed adjacent one another on the printing plate, and also enables the problems of conventional methods, such as the short supply of ink to the printing region where high concentration of ink is necessary, uneven ink supply in the adjacent printing regions, etc to be overcome or at least mitigated. Further, the method may be practised easily without any major alteration or modification of conventional printing equipments by simply attaching to the conventional printing area measuring device or to the printing press itself the processing unit described above to correct the quantity of ink supply for each-ink fountain determined directly from each area ratio of image portion or from the measurement by said measuring device.
Thus, the troublesome setting work which the priority press operator normally has to carry out can be reduced and moreover, highly acurate printing can be achieved by the elimination of wastage of time, paper, and ink before starting the printing operation.
Claims (16)
1. A method of controlling the supply of ink to a printing region of a printing plate, comprising measuring the proportion of the area of each printing region taken up by an image, correcting the measured image area proportion of a printing region in dependence on the measured image area proportion of the said printing region and the measured image area proportion of at least one printing region adjacent to the said printing reion, and controlling the supply of ink to the said printing region in accordance with the measured image area proportion thereof.
2. A method according to claim 1, wherein the measured image area proportion of the said printing region is corrected in dependence on the measured image area proportion of at least two printing regions, one either side of the said printing region.
3. A method according to claim 2, wherein the measured image area proportion of the said printing region is corrected using the following equation:
X(i) = b.X(i-1) + a.X(i) + c.X(i + 1),
where X (i) is the corrected image area proportion of the ith printing region, X(i - 1), (X(i),
X(i + I) are, respectively, the measured image area proportions of the (i-l)th, ith, and (i + I)th printing regions on the printing plate, and a,b, and c are weighting coefficients.
4. A method according to claim 1 or 2, wherein the image area proportions of each printing region adjacent to the said printing region for which the supply quantity of ink is to be controlled is determined by measuring the image area proportion in at least one-third of the printing region adjacent the said printing region.
5. A method according to claim 2 or 3, wherein, when the measured image area proportion of an end printing region of the printing plate is tobe corrected, the measured image area proportion of the printing region adjacent the said end printing region and an image area proportion of 0% are used as the two measured image area proportions for correcting the measured image area proportion of the end printing region.
6. A method according to claim 2 or 3, wherein, when the measured image area proportion of an end printing region of the printing plate is to be corrected, the meausred image area proportion of the printing region adjacent the said end printing region and an image area proportion equal to the image area proportion of the said end printing area are used as the two measured image area proportions for correcting the measured image area proportion of the end printing region.
7. A method of controlling the supply of ink to a printing region of a printing plate, comprising measuring the proportion of the area of each printing plate occupied by an image, determining the quantity of ink to be supplied to a respective ink fountain associated with each printing region directly from the measured image area proportion of the printing region, correcting the determined quantity to be supplied to an ink fountain in dependence upon the determined quantity of ink for that ink fountain and the determined quantity of ink for at least one ink fountain adjacent to the said ink fountain, and controlling the supply of ink to the said fountain in accordance with the said corrected determined quantity.
8. A method according to claim 7, wherein the determined quantity of ink to be supplied to the said fountain is corrected in dependence upon the determined quantity of ink to be supplied to at least two ink fountains, one on either side of the said ink fountain.
9. A method according to claim 8, wherein when the determined ink quantity for an ink fountain associated with an end printing region of the printing plate is to be corrected, the determined ink quantities used are the determined ink quantity of the ink fountain adjacent the said ink fountain and a determined ink quantity which is taken to be zero.
10. A method according to claim 8, wherein, when the determined ink quantity for an ink fountain associated with an end printing region of the printing plate is to be corrected, the determined ink quantities used are the determined ink quantity for the ink fountain adjacent the said ink fountain and a determined ink quantity which is taken to be approximately equal to the determined ink quantity for the said ink fountain.
11. A method of controlling the supply of ink to a printing region or a printing plate substantially as hereinbefore described with reference to the accompanying drawings.
1 2. Apparatus for controlling the supply of ink to a printing region of a printing plate, comprising means for measuring the proportion of the area of each printing region taken up by an image, means for correcting the measured image are proportion of a printing region in dependence on the measured image area proportion of the said printing region and the measured image area proportion of at least one printing region adjacent to the said printing region, and means for controlling the supply of ink to the said printing region in accordance with the measured image area proportion thereof.
1 3. Apparatus for controlling the supply of ink to a printing region of a printing plate, comprising means for measuring the proportion of the area of each printing plate occupied by an image, means for determining the quantity of ink to be supplied to a respective ink fountain associated with each printing region directly from the measured image area proportion of the printing region, means for correcting the determined quantity of ink to be supplied to an ink fountain in dependence upon the determined quantity of ink for that ink fountain and the determined quantity of one ink for at least one ink fountain adjacent to the said ink fountain, and means for controlling the supply of ink to the said fountain in accordance with the corrected determined quantity.
1 4. Apparatus for controlling the supply of ink to a printing region of a printing plate substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
1 5. A printing press comprising a printing plate having a plurality of strip-like printing regions arranged parallel to one another and to a direction in which the printing plate is movable and a plurality of ink fountains each arranged adjacent a respective printing region, the printing press incorporating apparatus in accordance with claims 12, 1 3 or 14.
16. Any novel feature or combination of features described herein.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58094574A JPS59218859A (en) | 1983-05-26 | 1983-05-26 | Method for setting ink supply amount |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8412962D0 GB8412962D0 (en) | 1984-06-27 |
| GB2140353A true GB2140353A (en) | 1984-11-28 |
| GB2140353B GB2140353B (en) | 1987-02-18 |
Family
ID=14114061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08412962A Expired GB2140353B (en) | 1983-05-26 | 1984-05-21 | A method of and apparatus for controlling a printing ink supply |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS59218859A (en) |
| DE (1) | DE3417680A1 (en) |
| FR (1) | FR2550131A1 (en) |
| GB (1) | GB2140353B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4649500A (en) * | 1984-10-26 | 1987-03-10 | Dainippon Screen Mfg. Co., Ltd. | Collection method of data on feed amount of printing ink and system therefor |
| FR2608510A1 (en) * | 1986-12-20 | 1988-06-24 | Heidelberger Druckmasch Ag | METHOD FOR DETERMINING CONTROL SIZES / REGULATION OF INK OF PRINTING MACHINES |
| GB2217653A (en) * | 1988-04-26 | 1989-11-01 | Allen Bradley Int | Control apparatus for ink zones in a printing press |
| GB2248423A (en) * | 1988-04-26 | 1992-04-08 | Allen Bradley Int | Printing apparatus having provision for setting ink zone adjusters with respect to non-coincident measurement zones |
| EP1832421A1 (en) * | 2006-03-09 | 2007-09-12 | Dainippon Screen Mfg., Co., Ltd. | Ink feeding rates control method and representative point determining apparatus |
| CN100589978C (en) * | 2008-05-20 | 2010-02-17 | 中国人民解放军信息工程大学 | A Method for Determining Ink Supply of Printing Machine |
| EP2006104A3 (en) * | 2007-06-21 | 2010-03-17 | Komori Corporation | Ink supply amount adjustment method and system for relief printing press |
| EP1894724A3 (en) * | 2006-09-04 | 2011-07-20 | Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. | Line sensor and printing press |
| EP1839863A3 (en) * | 2006-03-28 | 2011-08-03 | Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. | Ink control apparatus, printer, and printing method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446927Y2 (en) * | 1986-06-17 | 1992-11-05 | ||
| JPH01141054A (en) * | 1987-11-28 | 1989-06-02 | Sumitomo Heavy Ind Ltd | Method for presetting inking arrangement in printing press |
| DE19711918B4 (en) * | 1997-03-21 | 2011-07-21 | Heidelberger Druckmaschinen AG, 69115 | Method for adjusting the ink layer thickness when applying printing ink to a substrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835777A (en) * | 1973-01-16 | 1974-09-17 | Harris Intertype Corp | Ink density control system |
| GB2024457A (en) * | 1978-06-07 | 1980-01-09 | Harris Corp | Printing press make ready and control system |
| GB2073671A (en) * | 1980-04-10 | 1981-10-21 | Polygraph Leipzig | Inking control system for a printing machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD159254A3 (en) * | 1980-04-10 | 1983-03-02 | Foerster Karl Heinz | CONTROL DEVICE FOR COLOR ZONE ADJUSTMENT ON PRINTING MACHINES |
| DD206763B1 (en) * | 1981-12-21 | 1987-05-13 | Foerster Karl Heinz | CONTROL DEVICE FOR COLOR ZONE ADJUSTMENT ON PRINTING MACHINES |
| JPS5971863A (en) * | 1982-10-18 | 1984-04-23 | Toshiba Mach Co Ltd | Printer |
-
1983
- 1983-05-26 JP JP58094574A patent/JPS59218859A/en active Pending
-
1984
- 1984-05-12 DE DE19843417680 patent/DE3417680A1/en not_active Ceased
- 1984-05-21 GB GB08412962A patent/GB2140353B/en not_active Expired
- 1984-05-23 FR FR8408027A patent/FR2550131A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835777A (en) * | 1973-01-16 | 1974-09-17 | Harris Intertype Corp | Ink density control system |
| GB2024457A (en) * | 1978-06-07 | 1980-01-09 | Harris Corp | Printing press make ready and control system |
| GB2073671A (en) * | 1980-04-10 | 1981-10-21 | Polygraph Leipzig | Inking control system for a printing machine |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4649500A (en) * | 1984-10-26 | 1987-03-10 | Dainippon Screen Mfg. Co., Ltd. | Collection method of data on feed amount of printing ink and system therefor |
| FR2608510A1 (en) * | 1986-12-20 | 1988-06-24 | Heidelberger Druckmasch Ag | METHOD FOR DETERMINING CONTROL SIZES / REGULATION OF INK OF PRINTING MACHINES |
| GB2217653A (en) * | 1988-04-26 | 1989-11-01 | Allen Bradley Int | Control apparatus for ink zones in a printing press |
| GB2248423A (en) * | 1988-04-26 | 1992-04-08 | Allen Bradley Int | Printing apparatus having provision for setting ink zone adjusters with respect to non-coincident measurement zones |
| GB2248423B (en) * | 1988-04-26 | 1992-10-14 | Allen Bradley Int | Control apparatus |
| GB2217653B (en) * | 1988-04-26 | 1992-10-14 | Allen Bradley Int | Control apparatus |
| EP1832421A1 (en) * | 2006-03-09 | 2007-09-12 | Dainippon Screen Mfg., Co., Ltd. | Ink feeding rates control method and representative point determining apparatus |
| US7643176B2 (en) | 2006-03-09 | 2010-01-05 | Dainippon Screen Mfg. Co., Ltd. | Method and apparatus controlling printed color tone conditionally using a representative point or alternative representative point |
| EP1839863A3 (en) * | 2006-03-28 | 2011-08-03 | Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. | Ink control apparatus, printer, and printing method |
| EP1894724A3 (en) * | 2006-09-04 | 2011-07-20 | Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd. | Line sensor and printing press |
| EP2006104A3 (en) * | 2007-06-21 | 2010-03-17 | Komori Corporation | Ink supply amount adjustment method and system for relief printing press |
| CN100589978C (en) * | 2008-05-20 | 2010-02-17 | 中国人民解放军信息工程大学 | A Method for Determining Ink Supply of Printing Machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59218859A (en) | 1984-12-10 |
| GB2140353B (en) | 1987-02-18 |
| FR2550131A1 (en) | 1985-02-08 |
| DE3417680A1 (en) | 1984-11-29 |
| GB8412962D0 (en) | 1984-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2140353A (en) | A method of and apparatus for controlling a printing ink supply | |
| EP0884180B1 (en) | Process for controlling or regulating operations carried out by a printing machine | |
| US4901254A (en) | Method and apparatus for influencing the colour appearance of a colored area in a printing process | |
| EP1437222B1 (en) | Printing method, printed matter, and printing controller | |
| US4947746A (en) | Print control strip | |
| US5347369A (en) | Printer calibration using a tone reproduction curve and requiring no measuring equipment | |
| DE69711386T2 (en) | Method for controlling the register of printed images in a printer | |
| US6253678B1 (en) | Method of printing to reduce misregistration | |
| US7551775B2 (en) | Method for evaluating an image of a predetermined extract of a printed product | |
| SE443669B (en) | PROCEDURE AND DEVICE FOR PRE-ASSESSMENT OF SAMPLING PROPOSALS FOR TEXTILE, DECOR- OR PACKAGING PRESSURE | |
| DE10241936A1 (en) | Color value correction during a color calibration | |
| US7000544B2 (en) | Measurement and regulation of inking in web printing | |
| US6109183A (en) | Measuring field block for detecting quality data in the multicolor printing of single editions | |
| EP0177921B1 (en) | Method and device for measuring the quantity of water dampening the face of an offset printing plate | |
| US4384337A (en) | Zonal ink distribution measuring method and system | |
| EP1285529B1 (en) | Calibrating printing machines | |
| DE10152679A1 (en) | Calibration of mass-produced CCD emission spectrometers, whereby calibration is split into spectrometer dependent and independent functions, with the independent function determined for all systems using a reference spectrometer | |
| US20050243120A1 (en) | Method for calibrating a write head for producing a printing plate | |
| EP0476035B1 (en) | A method and a system for control of printing processes | |
| US4448533A (en) | Apparatus for ensuring the quality of printed products | |
| JP4306175B2 (en) | Printing method using patch and printed matter | |
| US20200055308A1 (en) | Method for controlling a display device which is connected in data terms to a printing press, and display device of a printing press | |
| JP2814842B2 (en) | Printing stain inspection equipment | |
| GB2132754A (en) | Determination of print area of a printing master | |
| DE3417470A1 (en) | Device for measuring convergence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930521 |