JPS6021403A - Method for measuring printed area - Google Patents
Method for measuring printed areaInfo
- Publication number
- JPS6021403A JPS6021403A JP58128746A JP12874683A JPS6021403A JP S6021403 A JPS6021403 A JP S6021403A JP 58128746 A JP58128746 A JP 58128746A JP 12874683 A JP12874683 A JP 12874683A JP S6021403 A JPS6021403 A JP S6021403A
- Authority
- JP
- Japan
- Prior art keywords
- printing plate
- area
- read
- colored
- camera
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 3
- 238000005259 measurement Methods 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 238000004040 coloring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000011295 pitch Substances 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
- B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は印刷版を使用して印刷する際に、この印刷版
に供給されるインキ量を適正にする為に。DETAILED DESCRIPTION OF THE INVENTION This invention aims to optimize the amount of ink supplied to a printing plate when printing using a printing plate.
多め印刷版面上のインキが供給される面積の割合を測定
する印刷面積測定法に関する。This invention relates to a printing area measurement method for measuring the proportion of the area on a printing plate to which ink is supplied.
従来の印刷機に於ては、装着された印刷版の回転方向と
直交する方向に複数個のインキ流量調整装置が等ピッチ
で並設され、印刷に際してはオペレータが印刷版の図柄
に応じて刷り」二つだ印刷物上にインキが過不足なく供
給される様に各インキ流量調整装置を調整することが行
なわれていた。In conventional printing machines, a plurality of ink flow rate adjusting devices are arranged in parallel at equal pitches in a direction perpendicular to the rotational direction of the installed printing plate, and when printing, an operator adjusts the printing according to the pattern on the printing plate. Each ink flow rate adjusting device was adjusted so that just the right amount of ink was supplied to the printed matter.
しかし、この調整には時間が係ると共に熟練されたオペ
レータでも的確に調整することは困難な作業であった。However, this adjustment takes time and is difficult even for experienced operators to make accurate adjustment.
この各インキ流量調整装置の初期設定を迅速で的確に行
なうことは、刷り出しをそれだけ早くでき、しかも損紙
を減少させる効果がある。その為に印刷版のインキが供
給される図柄面積を測定することが必要である。この測
定の為に各種の測定方法が提案されているが、一般的に
は光学系と受光素子を使用して印刷版上の図柄の一定面
積に投光し、この反射光を受光素子で受光し、反射光の
強弱を電気信号に変換し、印刷版の各インキ流量調整装
置に対応する領域毎に集積して、インキの供給量を算出
していた。この場合に印刷版の図柄は網点の集合で構成
されているのに対して、この方法では図柄の一定面積部
分での反射光の明暗を全体的に読取って電気信号に変換
し、集積してインキの供給量を演算するので、測定結果
と実際のインキ必要量との間に誤差が生じ、測定結果に
基づいてインキ流量調整装置を調整しても、オペレータ
が再調整を行なわなければならない欠点が存在した。Prompt and accurate initial setting of each ink flow rate adjustment device has the effect of speeding up printing and reducing paper waste. For this purpose, it is necessary to measure the pattern area of the printing plate to which ink is supplied. Various measurement methods have been proposed for this measurement, but generally speaking, an optical system and a light-receiving element are used to project light onto a fixed area of the design on the printing plate, and this reflected light is received by the light-receiving element. The intensity of the reflected light was then converted into electrical signals, which were integrated for each area of the printing plate corresponding to each ink flow rate adjustment device, to calculate the amount of ink supplied. In this case, the pattern on the printing plate is made up of a set of halftone dots, whereas in this method, the overall brightness and darkness of the reflected light on a certain area of the pattern is read, converted into an electrical signal, and integrated. Since the amount of ink to be supplied is calculated using There were drawbacks.
そこで本発明では、印刷版の図柄を拡大して網点として
読取るＴＶカメラと、このＴＶカメラで読取った網点を
着色部分と未着色部分に分解し、各印刷領域に対応した
着色部分の割合を演算する印刷面積測定法と構成したの
で、印刷版上の実際にインキが供給される網点の着色部
分を拡大して集積して読取り面積に対する着色部分の割
合を演算するので、インキ供給量との間で誤差の生じな
い印刷面積測定法を提供できる。Therefore, in the present invention, a TV camera is used to enlarge the pattern on the printing plate and read it as halftone dots, and the halftone dots read by this TV camera are separated into colored parts and uncolored parts, and the proportion of the colored part corresponding to each printing area is Since the printing area measurement method calculates the amount of ink supplied, the colored area of the halftone dots on the printing plate to which ink is actually supplied is enlarged and accumulated to calculate the ratio of the colored area to the reading area. It is possible to provide a printing area measurement method that does not cause errors between
この発明の実施例について図面に基づいて説明する。ま
ず最初に第１図は印刷版の配設されるステージを示し、
ステージ（１）の表面には印刷版（１０）が配設され、
この印刷版（１０）の図柄を走査する為にステージ（１
）には走査アーム（２）がＹ軸方向に移動１１丁能に配
設され、この走査アーｌ、（２）はエンコータ付のパル
スモータ（図示せず）でＹ軸方向に移動し、この移動の
制御はマイクロコンピュータ（２０）で行なわれる。ま
た走査アーム（２）には走査ヘッド（３）がＸ軸方向に
移動可能に配設され、この走査ヘッド（３）は走査アー
ム（２）に配設されたエンコーダ付のパルスモータ（図
示せず）でＸ軸方−に移動し、この移動はマイクロコン
ピュータ（２０）で制御される。そして走査ヘッド（３
）にはＴＶカメラ（４）が配設され、このＴＶカメラ（
４）には拡大レンズ（５）が配設されて印刷版（１０）
面を拡大して読取り走査する。このＴＶカメラ（４）で
拡大された印刷版（１０）は第２図に示される様に網点
て表わされ、着色部（１５）が大きい所が印刷された印
刷物の着色度が高く、着色部（１５）が小さい所が印刷
物の着色度が低くなる所で、着色度１００％で印刷物の
表面全体が着色部（１５）で形成され、着色度Ｏ％では
着色部（１５）は無く未着色部（１６）のみで形成され
ている。そして印刷版（１０）の着色部（１５）のみに
インキが供給されるので、印刷版（１０）に於ける各イ
ンキ流量調整装置に対応した各領域での着色部（１５）
と未着色部（１６）との割合を算出すれば正確にインキ
の供給量を測定することができる。Embodiments of the invention will be described based on the drawings. First of all, Figure 1 shows the stage where the printing plate is placed,
A printing plate (10) is arranged on the surface of the stage (1),
Stage (1) is used to scan the design of this printing plate (10).
) is equipped with a scanning arm (2) that moves in the Y-axis direction, and this scanning arm (2) moves in the Y-axis direction by a pulse motor (not shown) with an encoder. Movement is controlled by a microcomputer (20). Further, a scanning head (3) is disposed on the scanning arm (2) so as to be movable in the X-axis direction, and this scanning head (3) is driven by a pulse motor (not shown) equipped with an encoder disposed on the scanning arm (2). (20) moves in the X-axis direction, and this movement is controlled by a microcomputer (20). and the scanning head (3
) is equipped with a TV camera (4), and this TV camera (
4) is equipped with a magnifying lens (5) and the printing plate (10)
Magnify the area and read and scan it. The printing plate (10) magnified by the TV camera (4) is represented by halftone dots as shown in FIG. A place where the colored part (15) is small is a place where the degree of coloring of the printed matter is low; at a degree of coloring of 100%, the entire surface of the printed matter is formed of the colored part (15), and at a degree of coloring of 0%, there is no colored part (15). It is formed of only an uncolored part (16). Since ink is supplied only to the colored part (15) of the printing plate (10), the colored part (15) in each area corresponding to each ink flow rate adjustment device on the printing plate (10)
The amount of ink supplied can be accurately measured by calculating the ratio between the color and the uncolored area (16).
次にＴＶカメラ（４）の配設された走査ヘッド（３）の
動作について第１図及至第３図に基づいて述べると、ス
テージ（１）に配設された印°刷版（ｌＯ）は各インク
流量調整装置に対応した各領域（１０−１） （１０−
２）・・・（１０−ｎ）を有し、この各領域（１０−１
）（１０−２）・・・（１０−ｎ）の図柄の着色部（１
５）の割合を測定する為にまず第１領域（１０−１）で
は走査アーム（２）が移動し、ＴＶカメラ（４）で第１
領域（１０−１）の第１列（１０−１１）を走査できる
位置で停止し、次に走査ヘッド（３）が上方から下方に
移動することによって第１領域（ｔｏ−１）の第１列（
ｔｏ−１，１）の図柄の拡大状態すなわち着色部と未着
色部がＴＶカメラ（４）で読取られてマイクロコンピュ
ータ（２０）の外部磁気記録部（２６）に記録される。Next, the operation of the scanning head (3) on which the TV camera (4) is arranged will be described based on Figs. 1 to 3. The printing plate (lO) arranged on the stage (1) Each area (10-1) corresponding to each ink flow rate adjustment device (10-
2)...(10-n), and each region (10-1
)(10-2)...(10-n) Colored part (1
In order to measure the ratio of 5), the scanning arm (2) moves in the first area (10-1), and the TV camera (4) measures the first area.
The scanning head (3) stops at a position where it can scan the first column (10-11) of the area (10-1), and then moves the scanning head (3) from above to below to scan the first column (10-11) of the first area (to-1). Column (
The enlarged state of the symbol to-1, 1), that is, the colored part and the uncolored part, are read by the TV camera (4) and recorded in the external magnetic recording section (26) of the microcomputer (20).
この第１領域（１０−１）の第１列（１０−１１）の読
取り方法は第１列（１０−ＩＩ）を順次」三方より第１
区（１０−１１１）、第２区（１０−１１２）・・・の
順で、’ｒ ｖカメラ（４）で一度に読取りｉｉＪ能な
面積毎に読取り記録する。この第１領域（１０−１）の
第１列（１，０−１１）の読取りが終了すると、走査ア
ーム（２）が移動して、第１領域（１０−１）の第２列
（１０−１２）の読取りができる位置で停止し、次に走
査ヘッド（３）が下方から上方に移動してＴＶカメラ（
４）で第２列（１０−１２）の図柄の着色部を読取り、
これを記録し、次に再度走査アーム（２）が移動して、
第１領域（１０−１）の第３列（１〇−１３）の読取り
ができる位置で停止し、次に走査ヘッド（３）が上方か
ら下方に移動してＴＶカメラ（４）で第３列（１０−１
３）の図柄の着色部、（１５）を読取り、これを記録す
る。そして第１領域（１０−１，）の読取りが全て終了
した所でマイクロコンピュータ（２０）で外部磁気記録
部（２６）に記録されていた図柄の着色部（１５）と未
着色部（１６）の割合を演算し、この結果をプリンタ（
２９）で打出す。この演算と並行して次の第２領域（１
０−２）の読取りが行なわれ、以下印刷版の面上でイン
キ流量調″Ｊ！装置に対応した各領域の全てで同じ動作
を繰返して面積測定を行なう。The method of reading the first column (10-11) of this first area (10-1) is to read the first column (10-II) sequentially from three sides.
The area (10-111), the second area (10-112), etc. is read and recorded in the order of each area that can be read at once by the RV camera (4). When the reading of the first column (1,0-11) of the first area (10-1) is completed, the scanning arm (2) moves to read the second column (1,0-11) of the first area (10-1). -12), then the scanning head (3) moves from below to above and the TV camera (
4) Read the colored part of the pattern in the second column (10-12),
This is recorded, and then the scanning arm (2) moves again,
It stops at a position where the third column (10-13) of the first area (10-1) can be read, and then the scanning head (3) moves from above to below and the TV camera (4) scans the third column. Column (10-1
3) Read the colored part (15) of the pattern and record it. When the reading of the first area (10-1,) is completed, the microcomputer (20) reads the colored part (15) and uncolored part (16) of the pattern recorded in the external magnetic recording section (26). Calculate the ratio of , and send this result to the printer (
29). In parallel with this operation, the next second area (1
0-2) is read, and then the same operation is repeated on the surface of the printing plate in all areas corresponding to the ink flow rate controller "J!" to measure the area.
次に第４図に示された演算制御回路について述べると、
マイクロコンピュータ（２０）にはインターフェイス回
路（２１）を介してキーボード（２２）が接続され、こ
のキーボード（２２）では走査ヘッド（３）のスタート
位置の設定、印刷版のＸ７寸法、領域数笠が人力される
。このキーボード（２２）の入力に基づいてスター１−
キーが押されると、走査アーム（２）と走査ヘソ１〜（
３）で構成されるＸＹコン１〜ローラ（２４）かインタ
ーフェース回路（２３）を介して制御され、Ｙ・め設定
された手順で移動し、この移動によって走査ヘッド（３
）に配設されたＴＶカメラ（／Ｉ）がステージ（１）上
面に配設された印刷版（１０）の図柄を読取る。この゛
１゛■カメラ（４）でんε取られた図柄信号はインター
フェース回路（２５）を介してマイクロコンピュータ（
２０）内を通過して外部磁気記録部（２６）にインター
フェース回路（２７）を介して記録され、この外部磁気
記録部（２６）で記録された図柄イ、ｊ号は各領域の読
取りが終了した毎にマイクロコンピュータ（２０）で着
色部（１５）と未着色部（１６）との割合が演算され、
インターフェース回路（２８）を介してプリンタ（２９
）で回続状に打出される。また演算結果については同時
に外部磁気記録部（２６）に記録さ］し、後１」、同じ
印刷版を使用して印刷物を刷る時に使用される。そして
マイクロコンピュータ（２０）にはインターフェース回
路（３０）を介してＴＶモニタ（３１）が配設され、Ｔ
Ｖカメラ（４）の読取り図柄を表示する。Next, the arithmetic control circuit shown in Fig. 4 will be described.
A keyboard (22) is connected to the microcomputer (20) via an interface circuit (21), and this keyboard (22) is used to set the starting position of the scanning head (3), to set the X7 dimensions of the printing plate, and to set the number of areas. Man-powered. Star 1- based on the input on this keyboard (22)
When the key is pressed, the scanning arm (2) and the scanning navel 1~(
The scanning head (3) is controlled via the XY controller 1 to roller (24) consisting of
) A TV camera (/I) placed on the stage (1) reads the pattern on the printing plate (10) placed on the top surface of the stage (1). The pattern signal taken by the camera (4) is sent to the microcomputer (25) via the interface circuit (25).
20) and are recorded in the external magnetic recording section (26) via the interface circuit (27), and the symbols A and J recorded in the external magnetic recording section (26) have finished reading each area. Each time, the microcomputer (20) calculates the ratio of the colored part (15) to the uncolored part (16),
The printer (29) via the interface circuit (28)
) is printed in a continuous form. Also, the calculation results are simultaneously recorded in an external magnetic recording section (26) and used later when printing printed matter using the same printing plate. A TV monitor (31) is connected to the microcomputer (20) via an interface circuit (30).
Display the symbol read by the V camera (4).
次に第５図に示されたマイクロコンピュータ（２０）の
プログラムのフローチャートについて述べると、まず（
４０）でキーボード（２２）よりスター１−信号が入力
されるとマイクロコンピュータ（２０）内のイニシャル
設定（４１）が行なわれ、次に（４２）でキーボード（
２２）より印刷版（１）のＸＹ寸法の入力が行なわれ、
次に（４３）で領域数の入力がキーボード（２２）で行
なわれ、次に（４４）でＸＹシコン−ローラ（２４）の
作動開始の入力がキーボード（２２）で行なわれ、次に
（４５）で走査ヘッド（３）が測定始点（４５）に移動
し、予め設定された順に走査ヘッド（３）が移動し、こ
の移動ｒｌＪに（４６）でＴＶカメラ（４）が印刷版の
図柄の読取りを行ない、次に（４７）で読取られた図柄
信号を外部磁気記録部（２６）に記録し、次に（４８）
で読取り記録動作で１つの領域が終了した所で図柄中の
着色部（１５）と未着色部（１６）の割合の演算をマイ
クロコンピュータ（２０）で行ない、次に（４９）で演
算結果をプリンタ（２９）でプリン１−すると同時に外
部磁気記録部（２６）で記録し、この動作を各領域毎に
繰返して、次に（５０）で全領域の測定が終了すると走
査ヘッド（３）を原点に復帰させて動作が終了する。Next, the flowchart of the program of the microcomputer (20) shown in FIG. 5 will be described.
When the star 1- signal is input from the keyboard (22) at step 40), initial settings (41) in the microcomputer (20) are performed, and then at step (42) the keyboard (
22), the XY dimensions of the printing plate (1) are input,
Next, at (43), the number of regions is input using the keyboard (22), then at (44), an input for starting the operation of the XY control roller (24) is input using the keyboard (22), and then (45) ), the scanning head (3) moves to the measurement starting point (45), the scanning head (3) moves in the preset order, and during this movement rlJ, the TV camera (4) moves to the measurement start point (45) at (46). The symbol signal read in (47) is then recorded in the external magnetic recording section (26), and then (48)
When one area is completed in the reading and recording operation, the microcomputer (20) calculates the ratio of the colored part (15) and the uncolored part (16) in the pattern, and then in (49) the calculation result is calculated. At the same time as the printer (29) prints 1-, the external magnetic recording unit (26) records the data, repeats this operation for each area, and then (50) when the measurement of all areas is completed, the scanning head (3) is turned on. The operation is completed by returning to the origin.
第１図はステージの平面図、第２図は拡大された印刷版
の網点の平面図、第３図は印刷版の拡大された平面図、
第４図はマイクロコンピュータ部分のブロック図、第５
図はマイクロコンピュータのプログラムのフローチャー
ト図を表わす。
第１図
第３図
ノFIG. 1 is a plan view of the stage, FIG. 2 is an enlarged plan view of halftone dots on the printing plate, and FIG. 3 is an enlarged plan view of the printing plate.
Figure 4 is a block diagram of the microcomputer part, Figure 5
The figure represents a flowchart diagram of a microcomputer program. Figure 1 Figure 3
Claims (1)
、このＴＶカメラで読取った網点を着色部分と未着色部
分に分ｍし、各印刷領域に対応した着色部分の割合を演
算する印刷面積測定法Printing involves a TV camera that enlarges the design on a printing plate and reads it as halftone dots, and a printer that divides the halftone dots read by the TV camera into colored and uncolored areas and calculates the proportion of colored areas corresponding to each printing area. Planimetry
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128746A JPS6021403A (en) | 1983-07-16 | 1983-07-16 | Method for measuring printed area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128746A JPS6021403A (en) | 1983-07-16 | 1983-07-16 | Method for measuring printed area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6021403A true JPS6021403A (en) | 1985-02-02 |
Family
ID=14992432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58128746A Pending JPS6021403A (en) | 1983-07-16 | 1983-07-16 | Method for measuring printed area |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021403A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251781A (en) * | 1986-04-25 | 1987-11-02 | Dainippon Printing Co Ltd | Manufacture of hologram |
| JPH07128036A (en) * | 1993-10-29 | 1995-05-19 | Mazda Motor Corp | Retroreflective coating rate measuring device |
| US5456058A (en) * | 1993-03-01 | 1995-10-10 | Riverwood International Corporation | Stacked article cartoning apparatus |
| WO1997021074A1 (en) * | 1995-12-06 | 1997-06-12 | Laurie Mullaney Associates Limited | Test equipment for colour printing |
| US5692361A (en) * | 1993-03-25 | 1997-12-02 | Riverwood International Corporation | Stacked article packaging method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58103605A (en) * | 1981-12-16 | 1983-06-20 | Toppan Printing Co Ltd | Device for measuring area rate of printing area of printing plate |
-
1983
- 1983-07-16 JP JP58128746A patent/JPS6021403A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58103605A (en) * | 1981-12-16 | 1983-06-20 | Toppan Printing Co Ltd | Device for measuring area rate of printing area of printing plate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251781A (en) * | 1986-04-25 | 1987-11-02 | Dainippon Printing Co Ltd | Manufacture of hologram |
| US5456058A (en) * | 1993-03-01 | 1995-10-10 | Riverwood International Corporation | Stacked article cartoning apparatus |
| US5692361A (en) * | 1993-03-25 | 1997-12-02 | Riverwood International Corporation | Stacked article packaging method |
| JPH07128036A (en) * | 1993-10-29 | 1995-05-19 | Mazda Motor Corp | Retroreflective coating rate measuring device |
| WO1997021074A1 (en) * | 1995-12-06 | 1997-06-12 | Laurie Mullaney Associates Limited | Test equipment for colour printing |
| GB2307983B (en) * | 1995-12-06 | 1998-04-29 | Laurie Mullaney Associates Lim | Test equipment for colour printing |
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