JPH10272761A - Hue fluctuation control apparatus for printed matter - Google Patents
Hue fluctuation control apparatus for printed matterInfo
- Publication number
- JPH10272761A JPH10272761A JP9077854A JP7785497A JPH10272761A JP H10272761 A JPH10272761 A JP H10272761A JP 9077854 A JP9077854 A JP 9077854A JP 7785497 A JP7785497 A JP 7785497A JP H10272761 A JPH10272761 A JP H10272761A
- Authority
- JP
- Japan
- Prior art keywords
- printed matter
- reflection density
- measuring
- printing
- ink
- 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
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】印刷機などで印刷する印刷物
のように、黄(Y)、紅(M)、藍(C)及び墨(B
K)の色材を一連の工程で順次印刷することにより写真
や絵柄などの色を再現しる場合、印刷物のバラツキを少
なくする為に各色の反射濃度を測定し、測定結果に基づ
きインキ供給量を制御し、色調の変動を少なくする装置
に関するものである。とりわけ、巻き取り用紙に輪転方
式で印刷する場合に有効な色調変動制御装置である。BACKGROUND OF THE INVENTION Yellow (Y), red (M), indigo (C) and black (B), such as printed matter printed by a printing machine or the like.
In order to reproduce colors such as photographs and pictures by sequentially printing the color materials of K) in a series of steps, the reflection density of each color is measured to reduce variations in the printed matter, and the ink supply amount is determined based on the measurement results. To reduce color tone fluctuations. In particular, the present invention is a color tone variation control device that is effective when printing on a take-up sheet by a rotary method.
【0002】[0002]
【従来の技術】印刷物の品質保証をするために、印刷見
本であり品質保証の基準となる校了紙と見較べて製品全
数に対してバラツキが生じないようにする。印刷の作業
では、印刷中の温度変動などによる印刷機・材料物性の
変化によって印刷物の色調が徐々に変化するため、色調
の修正を行う必要がある。2. Description of the Related Art In order to guarantee the quality of printed matter, there is no variation in the total number of products as compared with a print sample, which is a reference sheet for quality assurance. In the printing operation, since the color tone of the printed matter gradually changes due to a change in physical properties of the printing press and the material due to temperature fluctuations during printing, it is necessary to correct the color tone.
【0003】この作業は印刷される印刷物を見て校了紙
との色調の違いを的確に判断し、印刷機の幅方向(印刷
物が流れる方向とは直角の方向)に多数配置されたイン
キング・キーと呼ばれるインキ量を調節する機構により
調整を行う。多くの場合、印刷物を見て色調の違いを的
確に判断し、適正な調整作業をするのは熟練した作業者
の勘に頼っており、熟練作業者の確保、熟練度の維持・
向上に多大の経費と時間が必要となっている。[0003] In this work, the printed material to be printed is viewed, and the difference in color tone from the color of the printed paper is accurately judged, and a large number of inkings are arranged in the width direction of the printing press (a direction perpendicular to the direction in which the printed material flows).・ Adjustment is made by a mechanism for adjusting the amount of ink called a key. In many cases, color differences are judged accurately by looking at the printed matter, and appropriate adjustment work depends on the intuition of a skilled worker.
A great deal of money and time is needed for improvement.
【0004】また特に輪転機の場合は、印刷を完了し切
断、折り工程を経た印刷物でないと装置から取り出して
評価ができないため、色調の変動に気付いて調整を行う
までに時間がかかり、その間に印刷される印刷物は全て
不良となることがある。In the case of a rotary press, in particular, it is necessary to print out a printed material that has undergone printing, cutting, and folding steps before it can be taken out of the apparatus and evaluated, so that it takes time to notice color tone fluctuations and make adjustments. All printed materials may be defective.
【0005】このため印刷機上で色調の測定を行う装置
が望まれ開発されているが、印刷物上の絵柄の特定の部
分を測定する方式であるため、各インキ色がバランス良
く含まれている部分が絵柄上に存在しなければ精度が悪
くなる。また絵柄と一緒にカラーパッチと呼ばれる測定
用の絵柄を一緒に印刷し、 それを測定する方法がある
が、カラーパッチを印刷する部分が必要となるため印刷
用紙の増加につながる。For this reason, an apparatus for measuring the color tone on a printing press has been desired and developed. However, since it is a method of measuring a specific portion of a picture on a printed matter, each ink color is contained in a well-balanced manner. If the part does not exist on the picture, the accuracy will be poor. In addition, there is a method of printing a measurement pattern called a color patch together with the pattern and measuring it. However, a portion for printing the color patch is required, which leads to an increase in printing paper.
【0006】[0006]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、絵柄上の一つのインキング・キーが制御す
る範囲の反射濃度を測定することにより、版面上の印刷
インキの消費状態の情報を得、印刷機のインキング・キ
ーの開度を制御させることで、印刷物の色調変動を制御
させる装置を提供することである。SUMMARY OF THE INVENTION The problem to be solved by the present invention is to determine the consumption of printing ink on a printing plate by measuring the reflection density in a range controlled by one inking key on a picture. An object of the present invention is to provide a device for controlling color fluctuation of a printed material by obtaining information and controlling the opening of an inking key of a printing press.
【0007】[0007]
【課題を解決するための手段】インキ量を調整すること
により印刷物の色調を調整するインキイグ・キーを印刷
機の幅方向(印刷物が流れる方向とは直角の方向)に多
数配置されている印刷機において、印刷物を照射する白
色光源部と、印刷物からの反射光を受光し黄(Y)、紅
(M)、藍(C)並びに墨(BK)の反射濃度測定する
光電受光部に各色の補色である青(BL)、緑(G)、
赤(R)フィルターを設け並びに墨(BK)に対してフ
ィルターを設けていない構成の第一反射濃度測定部と、
印刷物を照射する赤外光源部と、印刷物からの赤外反射
光を受光し墨(BK)の反射濃度測定する第二反射濃度
測定部と、印刷物上の同一場所を測定するための測定タ
イミングを制御するタイミング発生部を有し、印刷機の
幅方向に関してインキング・キー位置に対応する位置
で、印刷物から一定の距離を保ちながら印刷物が処理さ
れる方向に沿って、一定の速度で印刷物上に繰り返し印
刷された絵柄を1回或いは複数回走査することで得られ
る積算された反射濃度と良品となるとなる印刷物(OK
シート)を同様の方法で得られた反射濃度とを比較して
比較値を算出し、該比較値に基づき、インキイグ・キー
の開度と濃度変化の相関データベースより、印刷機の各
色のインキング・キーを制御させる開度数値を算出する
数値演算処理部と、を具備する印刷物の色調変動制御装
置である。A printing press in which a large number of ink-ig keys for adjusting the color tone of a printed product by adjusting the amount of ink are arranged in the width direction of the printing machine (in a direction perpendicular to the direction in which the printed product flows). , A complementary color of each color is provided to a white light source unit for irradiating the printed matter and a photoelectric light receiving unit for receiving reflected light from the printed matter and measuring the reflection density of yellow (Y), red (M), indigo (C) and black (BK). Blue (BL), green (G),
A first reflection density measurement unit having a configuration in which a red (R) filter is provided and a filter is not provided for black (BK);
The infrared light source for irradiating the printed matter, the second reflection density measuring unit for receiving the infrared reflected light from the printed matter and measuring the reflection density of black (BK), and the measurement timing for measuring the same place on the printed matter are as follows. It has a timing generator that controls the printing on the print at a constant speed along the direction in which the print is processed while maintaining a certain distance from the print at a position corresponding to the inking key position in the width direction of the printing press. And a printed product (OK) that is obtained by scanning the pattern repeatedly printed one or more times with the integrated reflection density.
The sheet) is compared with the reflection density obtained by the same method to calculate a comparison value. Based on the comparison value, the inking of each color of the printing press is performed from the correlation database of the opening degree of the ink ig key and the density change. A color tone variation control device for printed matter, comprising: a numerical operation processing unit that calculates an opening degree numerical value for controlling a key.
【0008】墨(BK)インキが含まれていない絵柄部
分は、BL,G,Rフィルターによって黄(Y),紅
(M),藍(C)インキの成分は分離できるが、墨(B
K)が含まれている部分は墨(BK)インキと黄
(Y),紅(M),藍(C)インキの成分をそれぞれ分
離しなければならない。この為に、以下のようにして分
離する。[0008] In a picture portion containing no black (BK) ink, the components of yellow (Y), red (M), and indigo (C) inks can be separated by the BL, G, and R filters.
In the portion containing K), the components of black (BK) ink and yellow (Y), red (M), and indigo (C) inks must be separated. For this purpose, separation is performed as follows.
【0009】印刷インキの墨(BK)インキは、カーボ
ン粒子を主成分としており赤外光を吸収するが、Yイン
キ、Mインキ,Cインキのプロセスインキは、有機顔料
等を主成分としているため赤外光を吸収しない。この特
性を利用して、印刷物の黒色に見えている部分が黄
(Y),紅(M),藍(C)インキの3色重ね刷りされ
て黒色になっているか、墨(BK)インキのみで印刷さ
れているか、判別することができる。又、同様に黒色に
見えている部分がどの割合で黄(Y),紅(M),藍
(C)インキと墨(BK)インキで黒色を再現している
か判別することが可能となる。The black (BK) ink of the printing ink contains carbon particles as a main component and absorbs infrared light, whereas the process inks of the Y, M and C inks contain an organic pigment or the like as a main component. Does not absorb infrared light. Utilizing this characteristic, the black part of the printed matter is black-printed by three colors of yellow (Y), red (M) and indigo (C) inks, or only black (BK) ink Can be discriminated whether or not it is printed. Similarly, it is possible to determine the proportion of a portion that appears black in yellow (Y), red (M), indigo (C) ink and black (BK) ink.
【0010】すなわち、第一反射濃度測定部の黒色の反
射濃度測定は、光電受光部の前にフィルターを設けてい
ないのでY,M,Cインキと墨インキが重ね刷りされた
黒色全部の反射濃度を測定するのに対して、第二反射測
定部の黒色の反射濃度測定は、赤外光を照射し墨(B
K)インキのみの反射濃度を測定しているので、両者の
差をとれば黄(Y),紅(M),藍(C)インキが重な
って黒色になっている量を知ることができる。That is, in the measurement of the black reflection density of the first reflection density measuring section, since no filter is provided in front of the photoelectric receiving section, the reflection density of all black in which Y, M, C ink and black ink are overprinted is measured. Is measured, whereas the black reflection density measurement of the second reflection measurement unit irradiates infrared light and
K) Since the reflection density of only the ink is measured, the difference between the two can be used to determine the amount of yellow (Y), red (M), and indigo (C) inks that are superimposed and black.
【0011】黄(Y),紅(M),藍(C)インキがほ
ぼ同反射濃度で重ね刷りされると無彩色になるので、上
記で得られた黒色の差を等分して第一濃度測定部から得
られた黄(Y)インキ反射濃度、紅(M)インキ反射濃
度、藍(C)インキ反射濃度に分配して加算する。When the yellow (Y), red (M), and indigo (C) inks are overprinted at substantially the same reflection density, they become achromatic, so the difference in black obtained above is equally divided to obtain the first color. The reflection density is distributed to the yellow (Y) ink reflection density, the red (M) ink reflection density, and the indigo (C) ink reflection density obtained from the density measurement unit, and is added.
【0012】この様にすれば、印刷物上の測定部分の各
インキ反射濃度情報を知ることができる。反射濃度が高
ければインキが多く供給されて印刷されていることを示
し、インキング・キーの開度を絞り、反対に反射濃度が
低ければインキが少なく供給されて印刷されていること
を示し、インキング・キーの開度を広げて色調変動を制
御する。In this way, it is possible to know the ink reflection density information of the measurement portion on the printed matter. If the reflection density is high, it indicates that more ink is supplied and printing is performed, and the opening of the inking key is narrowed.On the other hand, if the reflection density is lower, it indicates that less ink is supplied and printing is performed, The color tone fluctuation is controlled by widening the opening of the inking key.
【0013】従来行われている部分的な測色は、印刷物
の絵柄の一部分に対して行うもので、例えばカタログ等
の印刷時に緑色の商品を測色した場合、黄(Y)と藍
(C)インキの情報は充分であっても紅(M)インキの
情報は不足してしまう。この為、あるインキング・キー
に対応する絵柄全体を1枚或いは数枚分を走査しながら
測色することによって、各インキの反射濃度成分をバラ
ンス良く測定でき、各インキの増減を精度良く検出でき
る。すなわち、印刷物の絵柄の一部分でなく、インキン
グ・キーが制御する印刷物の矩形状の濃度測定部(3
1)全体を走査して各インキ濃度を測定することであ
る。Conventionally, partial color measurement is performed on a part of a picture of a printed matter. For example, when a green product is measured during printing of a catalog or the like, yellow (Y) and indigo (C) are measured. ) Even though the information on the ink is sufficient, the information on the red (M) ink is insufficient. For this reason, by measuring the color while scanning one or several whole patterns corresponding to a certain inking key, the reflection density component of each ink can be measured in a well-balanced manner, and the increase / decrease of each ink can be detected accurately. it can. That is, the rectangular density measuring unit (3) of the printed matter controlled by the inking key is not a part of the picture of the printed matter.
1) To measure the density of each ink by scanning the whole.
【0014】インキング・キーの開度と濃度変化の相関
データは、予めインキング・キーの開度をどの位動かせ
ば反射濃度がどのように変化するか実験によって求めて
置き、このデータをデータベースとする。The correlation data between the opening degree of the inking key and the density change is obtained in advance by an experiment on how much the opening degree of the inking key should be moved to change the reflection density, and this data is stored in a database. And
【0015】反射濃度基準となる校了紙の色調に合わせ
たOKシートの濃度値と、測定した濃度を比較し、この
比較値に対応するインキング・キーの開度をデータベー
スから導き出し、インキング・キーの開度を変更して、
印刷物の色調変動を制御させる。The density value of the OK sheet corresponding to the color tone of the graduation paper as the reflection density standard is compared with the measured density, and the opening of the inking key corresponding to the comparison value is derived from the database, and the inking key is derived.・ Change the key opening,
Control the color tone fluctuation of the printed matter.
【0016】[0016]
【発明の実施の形態】図2は本発明による印刷物の反射
濃度を測定する部分を説明する概念図である。白色光源
20が発した光は印刷物に当たり、反射した光は赤
(R)フィルター(27)、緑(G)フィルター(2
8)、青(BL)フィルター(29)を通してそれぞれ
の藍(C)用光センサー(24)、紅(M)用光センサ
ー(23)、黄(Y)用光センサー(22)並びにフィ
ルターがない墨(BK)用光センサー(25)に入射さ
れる。又、赤外光源(21)が発した赤外光も印刷物に
当たり、赤外光の反射した光は赤外用光センサー(2
6)に入射される。FIG. 2 is a conceptual diagram for explaining a portion for measuring the reflection density of a printed matter according to the present invention. The light emitted from the white light source 20 hits the printed matter, and the reflected light is the red (R) filter (27) and the green (G) filter (2).
8) There is no light sensor (24) for indigo (C), light sensor (23) for red (M), light sensor (22) for yellow (Y) and no filter through blue (BL) filter (29). The light is incident on the black (BK) light sensor (25). Further, the infrared light emitted from the infrared light source (21) also hits the printed matter, and the reflected infrared light is reflected by the infrared light sensor (2).
6).
【0017】光センサーは、光電変換センサーであり反
射光量を測定することで反射濃度を測定することにな
る。The optical sensor is a photoelectric conversion sensor, and measures the reflection density by measuring the amount of reflected light.
【0018】図示してないが、光が光センサーに効率良
く入るようにレンズ、ミラーおよびスリットを適当に配
置する。あるいは反射光を光ファイバーによって光セン
サーに導光しても良い。Although not shown, lenses, mirrors and slits are appropriately arranged so that light can efficiently enter the optical sensor. Alternatively, the reflected light may be guided to an optical sensor by an optical fiber.
【0019】測定部分は印刷物に対して一定の距離に固
定し、走査は一定の速度で行う。走査の方向は印刷物が
処理される方向に行うことによって、測定部分を固定し
印刷物を移動した状態で測定でき、特に輪転印刷機のよ
うに印刷機内部での測定が可能となる。印刷物の幅方向
に対する測定部分の位置は、インキング・キーの位置に
対応する位置とし、1つの測定部分を幅方向に逐次移動
し、あるいはインキング・キーと同数の測定部分を取り
付けることによって実現する。The measuring portion is fixed at a fixed distance from the printed matter, and scanning is performed at a constant speed. By performing the scanning in the direction in which the printed matter is processed, the measurement can be performed while the measurement part is fixed and the printed matter is moved. In particular, the measurement can be performed inside a printing press such as a rotary printing press. The position of the measurement part with respect to the width direction of the printed matter is the position corresponding to the position of the inking key, and it is realized by sequentially moving one measurement part in the width direction or attaching the same number of measurement parts as the inking key I do.
【0020】測定は印刷機のローラーなどに設けられた
図示しないロータリーエンコーダによる信号から、絵柄
(30)の部分のみが測定範囲を通過するときだけ行
う。 印刷の場合は当然同様の絵柄が繰り返し印刷される
が、この反射濃度測定も繰り返し行い濃度信号を積算す
る。この結果、それぞれの絵柄(30)の測定部分(3
1)を測定したことになる。The measurement is performed only when only the picture (30) passes through the measurement range from a signal from a rotary encoder (not shown) provided on a roller of a printing press or the like. In the case of printing, the same pattern is printed repeatedly, but this reflection density measurement is also repeated and the density signal is integrated. As a result, the measurement part (3) of each picture (30)
This means that 1) was measured.
【0021】印刷の作業はインキング・キーその他の印
刷機に付属する調整機構を操作して、印刷物の色調と見
本となる校正刷りの色調を合わせ、色調が一致する(O
Kシートが印刷される)と今度は色調が変化しないよう
な操作を行いながら印刷を続行する。In the printing operation, the color tone of the printed matter is matched with the color tone of the sample proof print by operating the inking key and other adjustment mechanisms attached to the printing press so that the color tone matches (O).
Then, printing is continued while performing an operation that does not change the color tone.
【0022】本発明はOKシート印刷時に測定を行い、
印刷中に定期的に測定を行って、OKシート測定時の濃
度信号と比較する。この際赤(R)フィルター、緑
(G)フィルター、青(BL)フィルター並びにフィル
ターが無い光センサーと赤外光センサーから得られた反
射濃度の変化分はそれぞれ藍(C)、紅(M)、黄
(Y)並びに墨(BK)の各色インキが絵柄の色調変化
に与えた変動分に対応する。In the present invention, the measurement is performed at the time of printing the OK sheet,
Measurement is performed periodically during printing, and compared with the density signal at the time of measuring the OK sheet. At this time, the changes in the reflection density obtained from the red (R) filter, green (G) filter, blue (BL) filter, and the optical sensor without the filter and the infrared light sensor are indigo (C) and red (M), respectively. , Yellow (Y) and black (BK) correspond to the variation of the color tone of the picture.
【0023】図1は本発明による印刷物の色調変動制御
装置のブロック図である。白色光源部(1)、赤外光源
部(2)から印刷物を照射し、白色光源の反射光を可視
光光電受光部(3)、赤外光源の反射光を赤外光光電受
光部(4)に入射させる。第一反射濃度測定部(5)、
第二反射濃度測定部(6)は、印刷物の絵柄の測定場所
を同一にするために、ロータリーエンコーダ等のタイミ
ング発生部(7)によって測定のタイミングを制御させ
ている。FIG. 1 is a block diagram of a color tone variation control device for printed matter according to the present invention. The printed matter is irradiated from the white light source unit (1) and the infrared light source unit (2), the reflected light of the white light source is reflected by the visible light photoelectric receiving unit (3), and the reflected light of the infrared light source is reflected by the infrared light photoelectric receiving unit (4). ). First reflection density measurement unit (5),
The second reflection density measuring section (6) controls the timing of measurement by a timing generating section (7) such as a rotary encoder in order to make the measurement place of the picture of the printed matter the same.
【0024】第一反射濃度測定部(5)で、赤(R)フ
ィルター、緑(G)フィルター、青(BL)フィルター
並びにフィルターが無い光センサーから得られる反射濃
度情報信号を、及び第二反射濃度測定部(6)で赤外光
を吸収する墨インキのみの反射濃度情報信号を得て、数
値演算部(8)に入力する。In the first reflection density measuring section (5), a reflection density information signal obtained from a red (R) filter, a green (G) filter, a blue (BL) filter, and an optical sensor having no filter, and a second reflection A density measuring section (6) obtains a reflection density information signal of only black ink absorbing infrared light, and inputs the signal to a numerical calculation section (8).
【0025】数値演算部(8)において、設定された測
定回数分の濃度信号を積算して、測定部における黄
(Y)インキ、紅(M)インキ、藍(C)インキ、墨
(BK)インキの反射濃度の平均値を算出し、OKシー
トのデータと比較値をすることでインキング・キーの開
度と濃度変化の相関データベース(9)を参照して印刷
機のインキング・キー(10)を直接制御する。或いは
インキング・キーの開度を演算結果表示部(11)に表
示させ、作業者に指示しても良い。In the numerical operation section (8), the density signals for the set number of measurements are integrated, and the yellow (Y) ink, red (M) ink, indigo (C) ink, and black (BK) in the measurement section are integrated. The average value of the reflection density of the ink is calculated and compared with the data of the OK sheet to refer to the correlation database (9) of the opening degree of the inking key and the density change, and the inking key of the printing press (9). 10) is directly controlled. Alternatively, the opening degree of the inking key may be displayed on the calculation result display section (11) to instruct the operator.
【0026】[0026]
【発明の効果】インキング・キーの位置に沿って絵柄を
走査しながら測定することによって、その絵柄の色調に
合った各インキの濃度をバランス良く測定でき、精度を
向上させることができる。 また連続して印刷される同様
の絵柄を複数回測定して積算することにより、個々の絵
柄のばらつきや、 印刷物の蛇行やばたつきによる測定誤
差を緩和でき測定精度が向上する。According to the present invention, by measuring a pattern while scanning it along the position of the inking key, the density of each ink that matches the color tone of the pattern can be measured in a well-balanced manner, and the accuracy can be improved. In addition, by measuring and integrating a plurality of similar pictures that are continuously printed, variations in individual pictures and measurement errors due to meandering or fluttering of printed matter can be reduced, thereby improving measurement accuracy.
【0027】直接印刷に用いるインキ色( Y、 M、C、
BK) の変動量として評価できるため、作業者に直感的
に理解しやすく、また自動制御の際にも高速に処理でき
る。熟練作業者の勘に頼らなくても印刷中の色調の変化
を合理的な方法で判断でき、インキ量調整による色調の
自動制御を実現できる。Ink colors used for direct printing (Y, M, C,
Since it can be evaluated as the variation of BK), it is easy for the operator to intuitively understand, and high-speed processing can be performed during automatic control. The change in color tone during printing can be determined by a rational method without relying on the intuition of a skilled worker, and automatic control of color tone by ink amount adjustment can be realized.
【図1】本発明による印刷物の色調変動制御装置のブロ
ック図である。FIG. 1 is a block diagram of a color tone fluctuation control device for a printed material according to the present invention.
【図2】本発明による印刷物の反射濃度を測定する部分
を説明する概念図である。FIG. 2 is a conceptual diagram illustrating a portion for measuring the reflection density of a printed material according to the present invention.
1…白色光源部 2…赤外光源
部 3…可視光光電受光部 4…赤外光光
電受光部 5…第一反射濃度測定部 6…第二反射
濃度測定部 7…タイミング発生部 8…数値演算
部 9…相関データベース 10…インキン
グ・キー機構 11…演算結果表示部 20…白色光源 21…赤外光源 22…黄(Y)用光センサー 23…紅(M)
用光センサー 24…藍(C)用光センサー 25…墨(B
K)用光センサー 26…赤外光用光センサー 27…赤(R)
フィルター 28…緑(G)フィルター 29…青(B
L)フィルター 30…絵柄 31…濃度測定
部REFERENCE SIGNS LIST 1 white light source section 2 infrared light source section 3 visible light photoelectric receiving section 4 infrared light photoelectric receiving section 5 first reflection density measurement section 6 second reflection density measurement section 7 timing generation section 8 numerical value Computing unit 9 Correlation database 10 Inking key mechanism 11 Computation result display unit 20 White light source 21 Infrared light source 22 Light sensor for yellow (Y) 23 Red (M)
Light sensor 24 for indigo (C) Light sensor 25 for black (B)
Optical sensor for K) 26 ... Optical sensor for infrared light 27 ... Red (R)
Filter 28: Green (G) filter 29: Blue (B
L) Filter 30 ... Pattern 31 ... Density measuring unit
Claims (1)
調を調整するインキイグ・キーを印刷機の幅方向(印刷
物が流れる方向とは直角の方向)に多数配置されている
印刷機において、 印刷物を照射する白色光源部と、印刷物からの反射光を
受光し黄(Y)、紅(M)、藍(C)並びに墨(BK)
の反射濃度測定する光電受光部に各色の補色である青
(BL)、緑(G)、赤(R)フィルターを設け並びに
墨(BK)に対してフィルターを設けていない構成の第
一反射濃度測定部と、 印刷物を照射する赤外光源部と、印刷物からの赤外反射
光を受光し墨(BK)の反射濃度測定する第二反射濃度
測定部と、 印刷物上の同一場所を測定するための測定タイミングを
制御するタイミング発生部を有し、印刷機の幅方向に関
してインキング・キー位置に対応する位置で、印刷物か
ら一定の距離を保ちながら印刷物が処理される方向に沿
って、一定の速度で印刷物上に繰り返し印刷された絵柄
を1回或いは複数回走査することで得られる積算された
反射濃度と良品となるとなる印刷物(OKシート)を同
様の方法で得られた反射濃度とを比較して比較値を算出
し、 該比較値に基づき、インキイグ・キーの開度と濃度変化
の相関データベースより、印刷機の各色のインキング・
キーを制御させる開度数値を算出する数値演算処理部
と、を具備することを特徴とする印刷物の色調変動制御
装置。1. A printing machine in which a large number of ink Ig keys for adjusting the color tone of a printed matter by adjusting the amount of ink are arranged in the width direction of the printing machine (in a direction perpendicular to the direction in which the printed matter flows). A white light source unit to irradiate and receives reflected light from printed matter to receive yellow (Y), red (M), indigo (C), and black (BK)
The first reflection density of a configuration in which blue (BL), green (G), and red (R) filters, which are complementary colors of the respective colors, are provided in the photoelectric receiving unit for measuring the reflection density, and no filter is provided for black (BK) A measuring section, an infrared light source section for irradiating the printed matter, a second reflection density measuring section for receiving infrared reflected light from the printed matter and measuring the reflection density of black (BK), and for measuring the same place on the printed matter. A timing generator for controlling the measurement timing of the printing press, and at a position corresponding to the inking key position with respect to the width direction of the printing press, maintaining a certain distance from the printing product and along a direction in which the printing product is processed, Comparison of the integrated reflection density obtained by scanning the pattern repeatedly printed on the print at one or more times at a high speed with the reflection density obtained by the same method for the print (OK sheet) to be a good product I Calculating a comparison value based on the comparison value, than the correlation database opening and changes in the concentration of Inkiigu keys, each color inking of the printing press,
A numerical value processing unit for calculating a numerical value of an opening degree for controlling a key.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9077854A JPH10272761A (en) | 1997-03-28 | 1997-03-28 | Hue fluctuation control apparatus for printed matter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9077854A JPH10272761A (en) | 1997-03-28 | 1997-03-28 | Hue fluctuation control apparatus for printed matter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10272761A true JPH10272761A (en) | 1998-10-13 |
Family
ID=13645658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9077854A Pending JPH10272761A (en) | 1997-03-28 | 1997-03-28 | Hue fluctuation control apparatus for printed matter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10272761A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006240097A (en) * | 2005-03-03 | 2006-09-14 | Tokyo Printing & Equipment Trading Co Ltd | Equipment and method for inspecting printed matter |
US7573613B2 (en) | 2003-08-07 | 2009-08-11 | Mitsubishi Heavy Industries Ltd. | Method and apparatus for controlling picture color tone of printing press |
JP2014019089A (en) * | 2012-07-20 | 2014-02-03 | Komori Corp | Inspection device of sheet-like material |
-
1997
- 1997-03-28 JP JP9077854A patent/JPH10272761A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7573613B2 (en) | 2003-08-07 | 2009-08-11 | Mitsubishi Heavy Industries Ltd. | Method and apparatus for controlling picture color tone of printing press |
JP2006240097A (en) * | 2005-03-03 | 2006-09-14 | Tokyo Printing & Equipment Trading Co Ltd | Equipment and method for inspecting printed matter |
JP2014019089A (en) * | 2012-07-20 | 2014-02-03 | Komori Corp | Inspection device of sheet-like material |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3890048A (en) | Method and apparatus for measuring the color density of printing inks applied to a moving web | |
US4472736A (en) | Lithographic reproduction original classification and color separation tone curve adjustment | |
US4975862A (en) | Process and apparatus for the ink control of a printing machine | |
US5068810A (en) | Process for the determination of colorimetric differences between two screen pattern fields printed by a printing machine and process for the color control or ink regulation of the print of a printing machine | |
US7477420B2 (en) | Barless closed loop color control | |
US6065400A (en) | Method for monitoring registration of images printed by a printer | |
JP3770328B2 (en) | Color measurement method on a printing press by verification | |
JP2006177960A (en) | Light-emitting diode spectrophotometer with improved spectrum range | |
US6422142B2 (en) | Ink regulation device for a painting machine | |
US10525697B2 (en) | Inspection system having a plurality of detection zones | |
US7000544B2 (en) | Measurement and regulation of inking in web printing | |
JP2003080678A (en) | Apparatus and method for forming color adjusting characteristic curve and/or process adjusting characteristic curve | |
JP2001018364A (en) | Design color tone monitoring apparatus and print color tone controller | |
JP2918386B2 (en) | How to measure the print area ratio of printed originals, especially plates | |
US5927201A (en) | Device and process for carrying through quality management | |
JPH10272761A (en) | Hue fluctuation control apparatus for printed matter | |
US7002614B2 (en) | Method for calibration of a laser thermal halftone printer | |
JP2003011328A (en) | Printing color tone managing apparatus | |
JPH04345851A (en) | Color tone controller for print | |
JP2000006374A (en) | Printing density regulator | |
JPH10329307A (en) | Equipment for examining color tone of printed matter | |
JPH0858067A (en) | Method and apparatus for calculating ink variation amount of printed matter and method and apparatus for controlling ink supply amount of printer | |
GB2283092A (en) | Colour data evaluation in a printing process | |
JPS5962190A (en) | Offset printing plate | |
JPH11268394A (en) | Printing-out support system |