JP2002333723A - Producing method of double spread press plate for newspaper printing by means of laser direct plotting method - Google Patents
Producing method of double spread press plate for newspaper printing by means of laser direct plotting methodInfo
- Publication number
- JP2002333723A JP2002333723A JP2001139636A JP2001139636A JP2002333723A JP 2002333723 A JP2002333723 A JP 2002333723A JP 2001139636 A JP2001139636 A JP 2001139636A JP 2001139636 A JP2001139636 A JP 2001139636A JP 2002333723 A JP2002333723 A JP 2002333723A
- Authority
- JP
- Japan
- Prior art keywords
- printing
- plate
- spread
- laser scanning
- scanning heads
- 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
Landscapes
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンピュータから
の描画イメージ信号により複数基のレーザ走査ヘッドを
同時に作動させ、版材に直接所望の描画を行なうように
した新聞印刷用刷版の製作方法の改良に関するものであ
り、特に、複数基のレーザ走査ヘッドを用いて新聞の見
開き用の刷版を製作する場合に、刷版の描画面（刷面）
を極めて均質に仕上げることが出来、各レーザ走査ヘッ
ドによる描画領域の境界の接合部に全く差異を生じない
ようにした新規な新聞印刷用の見開き刷版の製造方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a printing plate for newspaper printing, in which a plurality of laser scanning heads are simultaneously operated by a drawing image signal from a computer to perform desired drawing directly on a plate material. The present invention relates to an improvement, and particularly when a printing plate for a spread of newspaper is manufactured using a plurality of laser scanning heads, the drawing surface (printing surface) of the printing plate.
The present invention relates to a novel spread printing plate manufacturing method for newspaper printing, which makes it possible to achieve a very uniform finish and to make no difference at the junction of the boundaries of the drawing areas by each laser scanning head.
【０００２】[0002]
【従来の技術】一般に、所謂片出し方式の新聞印刷用輪
転機に於いては、図４に示すように輪転機の版胴Ｑに新
聞８頁分の刷面Ｐａ〜Ｐｈを備えた刷版Ｐ1 〜Ｐ8 を取
り付け、輪転機の一つの印刷部で新聞８頁×２（表・
裏）＝１６頁分の印刷が行なわれている。また、所謂両
出し方式の新聞印刷用輪転機に於いては、前記一つの印
刷部で新聞４頁×２（表・裏）＝８頁分の印刷が行なわ
れている。更に、所謂片出し方式の新聞印刷用輪転機に
於いて、見開き用の刷面Ｚａ・Ｚｂや見開き用の刷面Ｚ
ｃ・Ｚｄを備えた刷版Ｓ1 〜Ｓ4 を取付ける場合には、
図５及び図６に示す如き形態で各見開き用刷版Ｓ1 〜Ｓ
4 が版胴Ｑに取り付けされている。2. Description of the Related Art In general, in a so-called single-sided press rotary press for newspaper printing, as shown in FIG. 4, a plate cylinder Q of the rotary press is provided with a printing surface Pa to Ph for eight pages of newspapers. Replacing P 1 to P 8, the rotary press one printing unit in a newspaper page 8 × 2 (Table &
(Back) = 16 pages are printed. Further, in a so-called double-sided newspaper printing press, eight pages of newspaper 4 pages × 2 (front / back) = 8 pages are printed by the one printing unit. Furthermore, in a so-called single-sided newspaper printing press, a spread printing surface Za / Zb or a spread printing surface Z is used.
When mounting the plate S 1 to S 4 having a c · Zd is
5 and the plate for each spread in form as shown in FIG. 6 S 1 to S
4 is attached to the plate cylinder Q.
【０００３】また、前記版胴Ｑに取り付けされる各刷版
Ｐ1 〜Ｐn 、Ｓ1 〜Ｓn としては、版面Ｐａ〜Ｐｎ、Ｚ
ａ〜Ｚｎの取替え頻度等に応じて適宜に組み合せしたも
のが使用されており、例えば、図７の如き新聞１頁分の
一つの刷面Ｐａのみを有する刷版Ｐ1 や二つの刷面Ｐａ
・Ｐｂを有する刷版Ｐ9 （図８）、四つの刷面Ｐａ・Ｐ
ｂ・Ｐｃ・Ｐｄを有する刷版Ｐ10（図９）、一つの見開
き用刷面Ｚａを有する見開き刷版Ｓ1 （図１０）、二つ
の見開き用の刷面Ｚａ・Ｚｂを有する見開き用刷版Ｓ5
（図１１）等が使用されている。[0003] The plate cylinder Q each plate P 1 to P n which is attached to, as the S 1 to S n, the plate surface Pa～Pn, Z
those combined appropriately in accordance with replacement frequency, etc. of a~Zn have been used, for example, the plate P 1 and the two printing surface Pa with only one printing surface Pa of one page, such as newspapers 7
Plate P 9 with Pb (FIG. 8), four printing surfaces Pa · P
Plate P 10 having b, Pc, Pd (FIG. 9), double-sided printing plate S 1 having one double-sided printing surface Za (FIG. 10), double-sided printing plate having two double-sided printing surfaces Za, Zb. Edition S 5
(FIG. 11) and the like are used.
【０００４】即ち、日本国に於いては、通常新聞１ペー
ジの大きさは、横幅Ｗ＝１６インチ（約４０６ｍｍ）及
び縦幅Ｌ＝２１．５インチ（約５４６ｍｍ）に選定され
ており、これに対応して新聞印刷用輪転機の版胴Ｑも、
外周長さｌをｌ＝４３インチ＋β（約１１８０ｍｍ）及
び横幅長さωをω＝６４″＋α（約１６７０ｍｍ）に夫
々選定されている。That is, in Japan, the size of one page of a normal newspaper is selected to be W = 16 inches (about 406 mm) and L = 21.5 inches (about 546 mm). In response to this, the plate cylinder Q of a newspaper printing press also
The outer peripheral length 1 is selected as l = 43 inches + β (about 1180 mm) and the lateral width ω is set as ω = 64 ″ + α (about 1670 mm).
【０００５】ところで、例えば、前記図１１に示した見
開き刷版Ｓ5 を製造する場合、従前の回転ドラム型製版
装置に於いては、図１２及び図１３に示す如く、横幅２
Ｗ×縦幅２Ｌの感光性の見開き用版材Ｆ（例えばＯＰＣ
版材やＰＳ版材）を露光ドラムＲの外表面に巻付け挿着
し、レーザ走査ヘッド（光学台）Ｈ1 ・Ｈ2 を矢印方向
へ横移動（主走査）させつつ露光ドラムＲを矢印方向へ
回転させ、コンピュータ（図示省略）からの描画イメー
ジ信号によってレーザ走査ヘッドの作動を制御すること
により、見開き用版材Ｆ上に直接に所定の描画（見開き
用刷面Ｚａ・Ｚｂ）を形成して行く。[0005] For example, when manufacturing a spread plate S 5 shown in FIG. 11, is at the previous rotary drum type plate making apparatus, as shown in FIGS. 12 and 13, the width 2
W × 2 L photosensitive spread plate material F (for example, OPC
Plate material or PS plate material) is wound around the outer surface of the exposure drum R and inserted, and the exposure drum R is moved while moving the laser scanning heads (optical benches) H 1 and H 2 in the direction of the arrow (main scanning). Direction, and controls the operation of the laser scanning head by a drawing image signal from a computer (not shown) to form a predetermined drawing (spreading surface Za, Zb) directly on the spread plate F. Go.
【０００６】また、見開き刷版Ｓ5 の製作速度（即ち、
刷面Ｚａ・Ｚｂの描画速度）を上げるため、通常はレー
ザ走査ヘッドを複数個（例えば２個）設け、両レーザ走
査ヘッドＨ1 ・Ｈ2 を同時に作動させることにより、刷
面Ｚａ・Ｚｂの右半領域Ｏ1をヘッドＨ1 により、また
刷面Ｚａ・Ｚｂの左半領域Ｏ2 をヘッドＨ2 により夫々
描画するようにしている。[0006] In addition, the production rate of the spread plate S 5 (ie,
To increase the drawing speed) of the printing surface Za · Zb, usually a plurality of laser scanning head (for example, two) is provided, by operating the two laser scanning head H 1 · H 2 simultaneously, the printing surface Za · Zb the head H 1 the right half area O 1, also have to be respectively drawn at the left half area O 2 of the printing surface Za · Zb by the head H 2.
【０００７】尚、図１２及び図１３に於いて、Ｈ1 ・Ｈ
2 はレーザ走査ヘッド、Ｔは版材Ｆの上・下端部の係止
機構、Ｚａ′・Ｚｂ′は見開刷面Ｚａ・Ｚｂの文字部分
（低画素密度領域）、Ｚａ″・Ｚｂ″は見開き刷面Ｚa
・Ｚb の写真・広告部（高画素密度領域）である。ま
た、前記図４乃至図１１に示した印刷用版胴Ｑや新聞印
刷用刷版Ｐ1 〜Ｐn、並びに図１２及び図１３に示した
ドラム回転型刷版製造装置は、特開平１０−３２３９６
０号等により何れも公知になつている技術である。従っ
て、本願発明ではその詳細な説明を省略する。In FIGS. 12 and 13, H 1 .H
2 is a laser scanning head, T is a locking mechanism for the upper and lower ends of the plate material F, Za 'and Zb' are character portions (low pixel density areas) of the spread printing surface Za and Zb, and Za "and Zb" are spread printing surface Z a
· Z b pictures and advertising unit is (high pixel density regions). Further, FIG. 4 to the printing plate cylinder Q or newspaper printing plate P 1 to P n shown in FIG. 11, as well as a drum rotary plate manufacturing apparatus shown in FIGS. 12 and 13, JP-A-10- 32396
No. 0 and the like are all known technologies. Therefore, a detailed description thereof will be omitted in the present invention.
【０００８】上記図１２及び図１３に示した複数基のレ
ーザ走査ヘッドＨ1 ・Ｈ2 を用いる見開き刷版Ｓ1 〜Ｓ
n の製作方法は、高速で見開き刷版を製作することがで
き、優れた実用的効用を奏するものである。しかし、当
該見開き刷版の製作方法にもまだ解決すべき問題が多く
残されており、その中でも特に解決を急がれている問題
は、両レーザ走査ヘッドＨ1 ・Ｈ2により描画した各領
域Ｏ1 ・Ｏ2 の接合部Ｋの連続性に関する問題である。[0008] Spreading plates S 1 to S using a plurality of laser scanning heads H 1 and H 2 shown in FIGS.
The production method of n can produce a double-sided printing plate at high speed, and has excellent practical utility. However, there are still many problems that need to be solved in the method of manufacturing the facing printing plate. Among them, the problem that is urgently solved is the area drawn by both laser scanning heads H 1 and H 2. This is a problem related to the continuity of the joint K between O 1 and O 2 .
【０００９】即ち、前記各レーザ走査ヘッドＨ1 ・Ｈ2
の走査作動は高精度で制御されており、従って、各描画
領域Ｏ1 ・Ｏ2 の接合部Ｋに於いてその刷面Ｚａ・Ｚｂ
内に不連続線等が生じることは殆んどない。特に刷面Ｚ
ａ・Ｚｂが全て文字面である場合には、相隣り合う文字
列の中間に各領域Ｏ1 ・Ｏ2 の接合部Ｋを位置させるこ
とにより、レーザ走査ヘッドの走査作動に何等かの原
因、例えば機械的振動や光学的ノイズ等によって若干の
制御誤差が生じたとしても、これ等の誤差は文字列の間
隙（約１〜１．５ｍｍ）Ｊ内に於いて完全に吸収される
ことになり、その結果各見開き用刷面Ｚａ・Ｚｂ内の接
合部Ｊに於いて大きな差異若しくは不連続線等が生じる
ことは殆んどない。That is, each of the laser scanning heads H 1 and H 2
The scanning operation is controlled with high precision, therefore, the printing surface Za · Zb at the junction K in the drawing area O 1 · O 2
There is almost no occurrence of discontinuous lines or the like. Especially the printing surface Z
When a and Zb are all character planes, by locating the joint K of each area O 1 and O 2 in the middle of adjacent character strings, any cause for the scanning operation of the laser scanning head, For example, even if a slight control error occurs due to mechanical vibration or optical noise, such error will be completely absorbed in the character string gap (about 1 to 1.5 mm). As a result, there is almost no occurrence of a large difference, a discontinuous line, or the like at the joint J in each of the facing printing surfaces Za and Zb.
【００１０】しかし、見開き用刷面Ｚａ・Ｚｂが文字列
部分と広告写真部分等の低画素密度領域Ｚａ′・Ｚｂ′
と高画素密度領域Ｚａ″・Ｚｂ″とから形成されている
場合には、前記機械的振動等によってレーザ走査ヘッド
Ｈ1 ・Ｈ2 の走査作動の制御精度が低下することによ
り、高画素密度領域Ｚａ″・Ｚｂ″に於いて不連続性が
顕出（例えば広告写真内の接合部Ｋの位置に細い縦線が
入ったり、写真の色調にづれを生じたりする）すること
になる。However, the spread printing surfaces Za and Zb are formed of low pixel density regions Za 'and Zb' such as a character string portion and an advertisement photograph portion.
And if it is formed from a high pixel density region Za "· Zb", by controlling accuracy of the scanning operation of the laser scanning head H 1 · H 2 is reduced by the mechanical vibration or the like, the high pixel density region Discontinuities appear at Za "and Zb" (for example, a thin vertical line may appear at the position of the joint K in the advertisement photograph, or the color tone of the photograph may be distorted).
【００１１】尚、上記各領域Ｏ1 ・Ｏ2 の接合部Ｋにお
ける上述の如き描画の不連続性等は、各レーザ走査ヘッ
ドＨ1 ・Ｈ2 の走査作動精度を上昇させることにより、
実用上差しつかえを生じないレベルにまで低減させるこ
とが可能であるが、走査作動精度を高めるためには相当
の費用を要するうえ、各領域Ｏ1 ・Ｏ2 の接合部Ｋに於
ける描画上の不連続性等のトラブルを、完全に防止でき
る状態にまで至っていないと云う問題がある。The above-described discontinuity of drawing at the joint K between the regions O 1 and O 2 can be improved by increasing the scanning operation accuracy of the laser scanning heads H 1 and H 2 .
Although it can be reduced to a level that does not cause any practical problem, considerable cost is required to increase the scanning operation accuracy, and the drawing at the joint K between the respective regions O 1 and O 2 is difficult. However, there is a problem that troubles such as discontinuity of the device cannot be completely prevented.
【００１２】[0012]
【発明が解決しようとする問題点】本願発明は、従前の
複数基のレーザ走査ヘッドを用いた見開き用刷版の製造
方法に於ける上述の如き問題、即ち、レーザ走査ヘッ
ドの走査作動の制御精度を高めることにより、各描画領
域の接合部に生ずる不連続線等のトラブルを防止しよう
とする場合には、制御装置等の設備費が高騰して経済性
に問題があること、レーザ走査ヘッドの走査作動の制
御精度を高めることができても、上記描画領域の接合部
Ｋに生ずる不連続線等トラブルを皆無にすることが不可
能であり、常にトラブル発生の危険性が内存すること等
の問題を解決せんとするものであり、発想の全き転換に
より、平盤状の支持架台や露光ドラムへの見開き用版材
Ｆの取り付け方向を９０°転換させることにより、複数
基のレーザ走査ヘッドＨ1 ・Ｈ 2 …Ｈn による各描画領
域Ｏ1 ・Ｏ2 …Ｏn の接合部を常に見開き用刷面Ｚａ・
Ｚｂ…の低密度画素領域Ｚａ′・Ｚｂ′…と高密度画素
領域Ｚａ″・Ｚｂ″…との間の間隙Ｊ内に位置させるこ
とにより、従前の複数基のレーザ走査ヘッドＨ1・Ｈ2
…を備えた露光装置でもって、常に安定した見開き用刷
面Ｚａ・Ｚｂ…を備えた見開き刷版Ｓ1 ・Ｓ2 …を製造
できるようにした見開き刷版の製造方法を提供せんとす
るものである。The problem to be solved by the present invention
Production of double-sided printing plates using multiple laser scanning heads
The above-mentioned problem in the method, namely, the laser scanning head.
By improving the control accuracy of the scanning operation of the
Let's prevent troubles such as discontinuous lines occurring at the junction of the area
In this case, the cost of equipment such as control
Problems with the scanning operation of the laser scanning head.
Even if the accuracy can be improved, the joint of the drawing area
It is impossible to eliminate any troubles such as discontinuous lines that occur in K
And there is always the danger of trouble occurring
Is to solve the problem of
More spread plate material for flat plate-like support bases and exposure drums
By changing the mounting direction of F by 90 °,
Base laser scanning head H1・ H Two... HnEach drawing area by
Area O1・ OTwo... OnThe spread surface Za /
Zb ... low-density pixel areas Za 'and Zb' ... and high-density pixels
It should be located in the gap J between the zones Za ", Zb" ...
As a result, the conventional plurality of laser scanning heads H1・ HTwo
With an exposure device equipped with ..., always stable spread printing
Facing plate S with surfaces Za, Zb ...1・ STwoManufacturing…
To provide a method of manufacturing a facing printing plate
Things.
【００１３】[0013]
【課題を解決するための手段】請求項１の発明は、コン
ピュータからの描画イメージ信号により複数基のレーザ
走査ヘッドＨ1 ・Ｈ2 ・Ｈn を同時に作動させ、レーザ
直接描画方式により異なる画素密度の描画領域を有する
見開き用刷版Ｓ1 ・Ｓ2 ・Ｓn を製造する方法に於い
て、見開き用刷材Ｆの、これに形成する刷面Ｚａ・Ｚｂ
・Ｚｎの文字行に平行な方向の一辺側を各レーザ走査ヘ
ッドの主走査方向とほぼ平行に配設し、前記各レーザ走
査ヘッドを主走査方向へ、また前記見開き用版材Ｆを各
レーザ走査ヘッドの主走査方向とほぼ垂直な方向へ移動
させることにより、前記複数基のレーザ走査ヘッドによ
り見開き用刷版の刷面低密度画素領域Ｚａ′・Ｚｂ′・
Ｚｎ′と高密度画素領域Ｚａ″・Ｚｂ″・Ｚｎ″を夫々
個別に描画すると共に、前記低密度画素領域と高密度画
素領域との接合部Ｋを前記刷面の低密度画素領域と高密
度画素領域との間に設けた間隙Ｊ内に位置させる構成と
したことを発明の基本構成とするものである。According to a first aspect of the present invention, a plurality of laser scanning heads H 1 , H 2, and H n are simultaneously operated by a drawing image signal from a computer, and different pixel densities are obtained by a laser direct drawing method. in the method for producing a printing plate S 1 · S 2 · S n for spread with the drawing area, the spread for printing material F, printing surface Za · Zb forming thereto
-One side of the direction parallel to the character line of Zn is arranged substantially parallel to the main scanning direction of each laser scanning head, and each laser scanning head is moved in the main scanning direction, and the spread plate F is moved to each laser. By moving the scanning head in a direction substantially perpendicular to the main scanning direction, the plurality of laser scanning heads reduce the printing surface low-density pixel areas Za ', Zb',.
Zn ′ and the high-density pixel areas Za ″, Zb ″, and Zn ″ are individually drawn, and a joint K between the low-density pixel area and the high-density pixel area is formed at a high density with the low-density pixel area on the printing surface. The basic configuration of the present invention is that it is configured to be located in the gap J provided between the pixel region and the pixel region.
【００１４】請求項２の発明は、請求項１の発明に於い
て、見開き用版材Ｆをドラム回転型露光装置の露光ドラ
ムＲの外表面へ巻装すると共に、レーザ走査ヘッドを２
基又は４基設ける構成としたである。According to a second aspect of the present invention, in the first aspect of the present invention, the spread plate material F is wound around the outer surface of the exposure drum R of the rotary drum type exposure apparatus, and the laser scanning head is used.
Or four groups.
【００１５】請求項３の発明は、請求項１の発明に於い
て、見開き用版材Ｆを支持盤スライド型露光装置の平面
状支持盤の上面へ装着すると共に、レーザ走査ヘッドを
２基又は４基設ける構成としたものである。According to a third aspect of the present invention, in the first aspect of the present invention, the spread plate F is mounted on the upper surface of the planar support plate of the support plate slide type exposure apparatus, and two laser scanning heads are provided. The configuration is such that four units are provided.
【００１６】請求項４の発明は、請求項２の発明に於い
て、見開き用版材Ｆの長辺側を露光ドラムＲの軸芯とほ
ぼ平行に配設し、前記見開き用版材を露光ドラムの外表
面へ巻装するようにしたものである。According to a fourth aspect of the present invention, in the second aspect of the present invention, the long side of the spread plate F is disposed substantially parallel to the axis of the exposure drum R, and the spread plate is exposed. It is wound around the outer surface of the drum.
【００１７】[0017]
【発明の実施の形態】以下、図面に基づいて本発明の実
施の形態を説明する。図１は、本方法発明の第１実施形
態を示す斜面図であり、図２は図１の側面図である。図
１及び図２に於いてＲは露光ドラム、Ｒａはドラム支
軸、１ａ・１ｂ・１ｃ・１ｄは版材吸着装置、Ｈ1 ・Ｈ
2 はレーザ走査ヘッド、Ｇ1 ・Ｇ2 はヘッドガイド軸、
Ｆは見開き用の感光性版材、Ｓ1 は見開き刷版である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of the present invention, and FIG. 2 is a side view of FIG. In FIGS. 1 and 2, R is an exposure drum, Ra is a drum support shaft, 1a, 1b, 1c, 1d is a plate material suction device, and H 1 · H
2 is a laser scanning head, G 1 and G 2 are head guide shafts,
F photosensitive plate material for spread, S 1 is the spread plate.
【００１８】前記露光ドラムＲは、従前の特開平１０−
３２３９６０号や特開平１１−１５３８７３号、特開平
１１−１６７２２７号等に開示されているドラム回転型
の印刷用刷版露光装置に設けられている露光ドラムと同
一のものであり、その外表面に２Ｗ×２Ｌの外形寸法を
有する１枚の見開き用の感光性印刷版材Ｆが巻装され、
版材吸着装置１ａ・１ｂによってその上・下両端部（長
さ２Ｌの側の端部）が吸着・固定されている。The exposure drum R is the same as that disclosed in the prior art
No. 323960, JP-A-11-153873, JP-A-11-167227, and the like, and are the same as the exposure drums provided in the drum rotation type printing plate exposure apparatus disclosed in JP-A-11-167227. One sheet of a photosensitive printing plate material F for facing pages having an outer dimension of 2W × 2L is wound,
Both upper and lower ends (ends on the side of the length 2L) are adsorbed and fixed by the plate adsorbing devices 1a and 1b.
【００１９】当該露光ドラムＲには、露光装置を構成す
る２基のレーザ走査ヘッドＨ1 ・Ｈ 2 がヘッドガイド軸
Ｇ1 ・Ｇ2 に矢印方向（主走査）へ移動自在に挿着され
ており、露光ドラムＲの矢印方向（副走査）の回転及び
レーザ走査ヘッドＨ1 ・Ｈ2の矢印方向への移動が一定
の位置関係をもって行なわれることにより、公知のコン
ピュータ（図示省略）からの描画イメージ信号を用いた
レーザ直接描画方式により、版材Ｆの所定位置上に異な
る見開き用の刷面Ｚａ・Ｚｂを有する２枚の見開き用刷
版Ｓ1 ・Ｓ2 （又は同じ見開き用刷面Ｚａ又はＺｂを有
する２枚の見開き用刷版Ｓ1 又はＳ2 ）が形成される。
尚、コンピュータを用いた複数基のレーザ走査ヘッドに
よるレーザ直接描画方式そのものは、上記先行文献のみ
ならず特開平９−６６５９５号等によっても公知である
ため、ここではその詳細な説明は省略する。The exposure drum R constitutes an exposure device.
Two laser scanning heads H1・ H TwoIs the head guide shaft
G1・ GTwoIs inserted movably in the direction of the arrow (main scanning)
Rotation of the exposure drum R in the direction of the arrow (sub-scan)
Laser scanning head H1・ HTwoMovement in the direction of the arrow is constant
With the positional relationship of
Using drawing image signals from a computer (not shown)
By the laser direct writing method, different
Two-page spread printing having double-sided printing surfaces Za and Zb
Edition S1・ STwo(Or have the same facing printing surface Za or Zb)
Two-page spread printing plate S1Or STwo) Is formed.
It should be noted that a plurality of laser scanning heads using a computer
Laser direct writing method itself is the only
It is also known by JP-A-9-66595
Therefore, the detailed description is omitted here.
【００２０】本発明に於いては、図１に示す如く、見開
き用版材Ｆの取付け方向を従前とは９０°変換させ、そ
の長手方向（長さ２Ｌ側）の一辺を露光ドラムＲの支軸
方向と角度θを持たせた状態で接当させ、これを露光ド
ラムＲの外表面へ巻装するようにしている。尚、角度θ
を持たせて見開き用版材Ｆを露光ドラムＲへ巻装するの
は、前記公知文献に記載の如く、見開き用刷面Ｚａ又は
Ｚｂの歪みを除去するためである。In the present invention, as shown in FIG. 1, the mounting direction of the double-sided printing plate F is changed by 90 ° from the conventional one, and one side in the longitudinal direction (2L side) is supported by the support of the exposure drum R. They are brought into contact with each other at an angle θ with respect to the axial direction, and are wound around the outer surface of the exposure drum R. Note that the angle θ
The spread plate material F is wound around the exposure drum R in order to remove the distortion of the spread printing surface Za or Zb as described in the above-mentioned known document.
【００２１】また、本発明に於いては、従前の機械式の
挾着機構とは異なって、見開き用版材Ｆの長手方向（長
さ２Ｌ側）の上・下端部（長さ２Ｌ側の端部）を真空式
の版材吸着装置１ａ・１ｂによって吸引固定するように
している。何故なら、輪転機の版胴Ｑへ見開き刷版を装
着する場合に、見開き刷版の長手方向の上・下端部（長
さ２Ｌ側）に折り曲げ部が存在すると、刷版の挿着が出
来なくなるからである。Further, in the present invention, unlike the conventional mechanical clamping mechanism, the upper and lower ends (length 2L side) of the spread plate material F in the longitudinal direction (length 2L side) are different. The end portions) are suction-fixed by vacuum plate adsorbing devices 1a and 1b. The reason is that when a double-sided printing plate is mounted on the plate cylinder Q of a rotary press, if the bent portions exist at the upper and lower ends (length 2L side) in the longitudinal direction of the double-sided printing plate, the plate can be inserted. Because it is gone.
【００２２】上述のように、本願発明では見開き用版材
Ｆの長手方向の側端を露光ドラムの外表面へ接当させる
ため、必然的に露光ドラムＲの軸方向寸法は大きくな
る。しかし、その直径は、逆にほぼ２Ｗの円周長さを有
するものでよく、露光ドラムＲそのものは細長形の形態
となる。As described above, in the present invention, since the longitudinal side end of the double-page spread F is brought into contact with the outer surface of the exposure drum, the axial dimension of the exposure drum R is inevitably increased. However, the diameter of the exposure drum R may have a circumference of about 2 W, and the exposure drum R itself has an elongated shape.
【００２３】前記図１の実施形態では１枚の版材Ｆに異
なる見開き用の刷面Ｚａ・Ｚｂを有する２枚の見開き刷
版Ｓ1 ・Ｓ2 が形成されることになり、刷面Ｚａ及びＺ
ｂの低密度画素領域（文字列部分）Ｚａ′・Ｚｂ′がレ
ーザ走査ヘッドＨ1 により、また、刷面Ｚａ及びＺｂの
高密度画素領域（写真部分）Ｚａ″・Ｚｂ″がレーザ走
査ヘッドＨ2 により、夫々描画されることになる。In the embodiment shown in FIG. 1, two facing printing plates S 1 and S 2 having different facing printing surfaces Za and Zb are formed on one plate material F, and the printing surface Za And Z
The low-density pixel region (character string part) Za '· Zb' laser scanning head H 1 of b, also printing surface Za and high density pixel region (photo portion) of Zb Za "· Zb" laser scanning head H By 2 , each is drawn.
【００２４】尚、本発明に於いても、見開き刷版Ｓ1 〜
Ｓn に描画された見開き用の刷面（描画面）Ｚａ〜Ｚｎ
の最終的な形態は、従前の見開き用の刷面の場合と全く
同一であり、ただ形成途中の刷面の形態が異なるだけで
ある。即ち、レーザ走査ヘッドＨ1 ・Ｈ2 へコンピュー
タから出力される描画イメージ信号の内容が若干異なる
だけである。Incidentally, also in the present invention, the facing printing plates S 1 to S 1
Printing surface for spread drawn to S n (drawing surface) Za～Zn
Is exactly the same as in the case of the conventional double-sided printing surface, only the shape of the printing surface being formed is different. That is, the contents of the drawing image signal outputted from the computer to the laser scanning heads H 1 and H 2 are only slightly different.
【００２５】図３は、本発明の第２実施形態を示す斜面
図であり、４基のレーザ走査ヘッドを設けることによ
り、低密度画素領域Ｚａ′・Ｚｂ′をレーザ走査ヘッド
Ｈ1a・Ｈ1bによって同時に、また高密度画素領域Ｚａ″
・Ｚｂ″をレーザ走査ヘッドＨ 2a・Ｈ2bによって同時
に、夫々形成するようにしたものであり、見開き刷版Ｓ
1・Ｓ2 の形成時間が、図１の場合の約１／２に短縮さ
れることになる。FIG. 3 is a perspective view showing a second embodiment of the present invention.
FIG. 4 shows a case where four laser scanning heads are provided.
The low-density pixel areas Za 'and Zb'
H1a ・ H1b at the same time and the high-density pixel area Za ″.
・ Zb ″ is the laser scanning head H Twoa ・ HTwosimultaneous by b
And the two-sided printing plate S
1・ STwoIs reduced to about half that of FIG.
Will be.
【００２６】本発明に於いては、レーザ走査ヘッドＨ1
による描画領域Ｏ1 （低密度画素領域Ｚａ′・Ｚｂ′）
と、レーザ走査ヘッドＨ2 による描画領域Ｏ2 （高密度
画素領域Ｚａ″・Ｚｂ″）との接合部Ｋが、高密度画素
部分（広告写真部分）Ｚａ″・Ｚｂ″と低密度画素部分
（文字列部分）Ｚａ′・Ｚｂ′との間に設けた間隙Ｊ内
に設定されることは勿論であり、これによって、前記接
合部Ｋの位置がレーザ走査ヘッドＨ1 ・Ｈ2 の制御精度
の低下によつて多少づれても、刷面（描画）Ｚａ・Ｚｂ
上に不連続線等の形で表われると云う不都合が、完全に
防止されることになる。In the present invention, the laser scanning head H 1
Drawing area O 1 (low-density pixel areas Za ′ and Zb ′)
A junction K between the laser scanning head H 2 and the drawing area O 2 (high-density pixel areas Za ″ and Zb ″) is composed of a high-density pixel part (advertising photograph part) Za ″ and Zb ″ and a low-density pixel part ( character string part) Za '· Zb' being set in the gap J provided between the is of course, whereby the position of the joint K is control accuracy of a laser scanning head H 1 · H 2 Even if the printing surface (drawing) Za / Zb is slightly deviated due to the drop,
The inconvenience of appearing in the form of discontinuities or the like above is completely prevented.
【００２７】尚、前記図１及び図３の各実施形態に於い
ては、露光ドラムＲへ２Ｌ×２Ｗの外形寸法の版材Ｆを
１枚巻装して見開き刷版Ｓ1 ・Ｓ2 を作成する場合につ
いて述べたが、１Ｌ×２Ｗ寸法のものを２枚並列的に巻
装したり、或いは１Ｌ×２Ｗ寸法のものを１枚だけ巻装
することにより、見開き刷版Ｓ1 ・Ｓ2 を形成すること
も可能である。In each of the embodiments shown in FIGS. 1 and 3, one plate material F having an outer dimension of 2 L × 2 W is wound around the exposure drum R, and the facing printing plates S 1 and S 2 are formed. has dealt with the case of creating or wound two in parallel those 1L × 2W dimensions, or by winding only one things 1L × 2W dimensions, spread plate S 1 · S 2 It is also possible to form
【００２８】また、図１及び図３の実施形態では、見開
き刷版Ｓ1 ・Ｓ2 の製作について述べたが、１Ｌ×１Ｗ
寸法の通常の新聞１頁用の版材Ｆを１枚又は２枚若しく
は３枚或いは４枚取り付けしたり、或いは２Ｌ×２Ｗの
寸法の版材を１枚、１Ｌ×２Ｗ寸法の版材を１枚又は２
枚取り付けして、通常の一種類の画素密度領域のみから
成る刷版Ｐ1 〜Ｐn を製作するようにしてもよいことは
勿論である。In the embodiment shown in FIGS. 1 and 3, the production of the facing printing plates S 1 and S 2 has been described.
One, two, three or four plate materials F for one page of a normal newspaper of one size are attached, or one plate material of 2L × 2W size is attached to one plate material of 1L × 2W size. Sheets or 2
And sheet attachment, to the plate P 1 to P n comprising only normal one type of pixel density area may be fabricated as a matter of course.
【００２９】更に、前記図１及び図３の実施形態では、
露光ドラムＲの外表面へ版材Ｆを巻装する型式の回転ド
ラム型露光装置を用いる場合について述べたが、露光ド
ラムＲの内壁面に沿って版材Ｆを巻装する型式の回転ド
ラム型露光装置であっても本発明を適用できることは勿
論である。Further, in the embodiment of FIGS. 1 and 3,
The case where the rotary drum type exposure apparatus of the type in which the plate material F is wound around the outer surface of the exposure drum R has been described, but the rotary drum type of the type in which the plate material F is wound along the inner wall surface of the exposure drum R has been described. Of course, the present invention can be applied to an exposure apparatus.
【００３０】加えて、前記図１及び図３の実施形態に於
いては、回転ドラム型の露光装置を用いる場合について
説明をしたが、本発明を例えば特開平９−６６５９６号
に開示されている如き所謂支持盤スライド型露光装置
（平面型露光装置）を用いて実施しても良いことは、勿
論である。In addition, in the embodiments of FIGS. 1 and 3, the case where a rotary drum type exposure apparatus is used has been described. The present invention is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-66596. Needless to say, the present invention may be implemented using a so-called support plate slide type exposure apparatus (flat type exposure apparatus).
【００３１】[0031]
【発明の効果】本発明は、コンピュータを用いたレーザ
直接描画方式により複数基のレーザ走査ヘッドを同時に
作動させ、異なる画素密度領域を有する見開き刷版を製
作する方法に於いて、見開き用の版材Ｆの取付け方向を
従前とは９０°違え、その長辺側をレーザ走査ヘッドの
移動方向（主走査方向）とほぼ平行状に配設すると共
に、当該見開き用版材Ｆをレーザ走査ヘッドの移動方向
とほぼ垂直方向に移動させ、前記複数基のレーザ走査ヘ
ッドにより見開き用刷版の刷面の低密度画素領域と高密
度画素領域とを夫々個別に描画すると共に、前記各描画
領域の接合部分を高密度画素領域と低密度画素領域との
間に設けた間隙内に位置させる構成としている。その結
果、本発明に於いては、レーザ走査ヘッドの走査制御精
度が振動等に起因して若干低下する場合があっても、上
記接合部分を高密度画素領域と低密度画素領域との間の
間隙内に位置させることが可能となり、従前の見開き刷
版の製造方法の場合のように、見開き刷版の刷面の高密
度画素領域（広告写真部分）又は低密度画素領域（文字
列部分）内に不連続線が表われたり、或いは接合部の色
調等が大きくづれると云うトラブルの発生を、ほぼ完全
に防止することができる。本発明は上述の通り、優れた
実用的効用を奏するものである。According to the present invention, there is provided a method of manufacturing a two-page spread plate having different pixel density regions by simultaneously operating a plurality of laser scanning heads by a laser direct drawing method using a computer. The mounting direction of the material F is different from the conventional one by 90 °, the long side of the material F is disposed substantially parallel to the moving direction (main scanning direction) of the laser scanning head, and the spread plate F is attached to the laser scanning head. In the direction substantially perpendicular to the moving direction, the low density pixel area and the high density pixel area on the printing surface of the facing printing plate are individually drawn by the plurality of laser scanning heads, and the drawing areas are joined. The portion is located in a gap provided between the high-density pixel region and the low-density pixel region. As a result, in the present invention, even if the scanning control accuracy of the laser scanning head is slightly reduced due to vibration or the like, the above-described joint is formed between the high-density pixel region and the low-density pixel region. It can be located in the gap, and as in the case of the conventional method of manufacturing a two-sided printing plate, a high-density pixel area (advertisement photograph part) or a low-density pixel area (character string part) on the printing surface of the two-sided printing plate. It is possible to almost completely prevent the occurrence of troubles such as the appearance of a discontinuous line or a large change in the color tone or the like of the joint. As described above, the present invention has excellent practical utility.
【図１】本願方法発明の第１実施形態を示す斜面図であ
る。FIG. 1 is a perspective view showing a first embodiment of the method invention of the present application.
【図２】図１の側面図である。FIG. 2 is a side view of FIG.
【図３】本方法発明の第２実施形態を示す斜面図であ
る。FIG. 3 is a perspective view showing a second embodiment of the present invention.
【図４】新聞印刷用輪転機の版胴への刷版の取付け状態
の一例を示す斜面図である。FIG. 4 is a perspective view showing an example of a state in which a printing plate is attached to a plate cylinder of a newspaper printing rotary press.
【図５】版胴へ見開き刷版を取付けした状態の一例を示
す斜面図である。FIG. 5 is a perspective view showing an example of a state in which a facing printing plate is attached to a plate cylinder.
【図６】版胴へ見開き刷版を取付けした状態の他例を示
す斜面図である。FIG. 6 is a perspective view showing another example of a state in which a facing printing plate is attached to a plate cylinder.
【図７】新聞１頁分の一つの刷面を有する刷版の平面図
である。FIG. 7 is a plan view of a printing plate having one printing surface for one page of a newspaper.
【図８】新聞２頁分の二つの刷面を有する刷版の平面図
である。FIG. 8 is a plan view of a printing plate having two printing surfaces for two newspaper pages.
【図９】新聞４頁分の四つの刷面を有する刷版の平面図
である。FIG. 9 is a plan view of a printing plate having four printing surfaces for four newspaper pages.
【図１０】一つの見開き用の刷面を有する見開き刷版の
平面図である。FIG. 10 is a plan view of a double-sided printing plate having one double-sided printing surface.
【図１１】二つの見開き用の刷面を有する見開き刷版の
平面図である。FIG. 11 is a plan view of a double-sided printing plate having two double-sided printing surfaces.
【図１２】ドラム回転型製版装置における露光ドラムへ
の見開き用版材の巻装状態を示す斜面図である。FIG. 12 is a perspective view showing a state in which a facing plate material is wound around an exposure drum in a drum rotary type plate making apparatus.
【図１３】図１２の側面図である。FIG. 13 is a side view of FIG.
Ｑは新聞印刷用輪転機の版胴 Ｐ1 〜Ｐ8 は刷版 Ｐa 〜Ｐn は刷版の刷面（描画） Ｓ1 〜Ｓn は見開き刷版 Ｚａ〜Ｚｎは見開き用刷面（描画） Ｆは感光性印刷版材 Ｗは新聞１頁分の版材の横幅寸法 Ｌは新聞１頁分の版材の縦幅寸法 Ｒは露光ドラム Ｒａはドラム軸 Ｈ・Ｈ1 ・Ｈ2 ・Ｈn はレーザ走査ヘッド Ｇ1 ・Ｇ2 はヘッドガイド軸 Ｔは版材Ｆの上・下端部係止機構 Ｚａ′・Ｚｎ′は見開き用刷面の低密度画素領域（文字
列部分） Ｚａ″・Ｚｎ″は見開き用刷面の高密度画素領域（広告
写真部分） Ｏ1 はレーザ走査ヘッドＨ1 による描画領域 Ｏ2 はレーザ走査ヘッドＨ2 による描画領域 Ｋは描画領域の接合部 Ｊは低密度画素領域と高密度画素領域との間の間隙 １ａ〜１ｄは版材吸着装置Q is the plate cylinder P 1 ~P 8 is the plate P a ~P n is printing surface of the printing plate of newspaper printing rotary press (drawing) S 1 ~S n is spread plate Za~Zn is spread for the printing surface ( drawing) F is the width dimension L of the photosensitive printing plate material W is the plate material of one page newspaper vertical width R of the plate material of one page newspaper exposure drum Ra is drum axis H-H 1-H 2 H n the upper and lower edge locking mechanism of the laser scan head G 1 · G 2 is the head guide shaft T is the plate material F Za ', Zn' is a low-density pixel region (character string part) of the spread for printing surfaces Za "・ Zn ″ is a high-density pixel area (advertising photograph portion) of the spread printing surface O 1 is a drawing area by the laser scanning head H 1 O 2 is a drawing area by the laser scanning head H 2 K is a junction of the drawing area J is low Gap between high density pixel area and high density pixel area
Claims (4)
より複数基のレーザ走査ヘッドＨを同時に作動させ、レ
ーザ直接描画方式により異なる画素密度の描画領域を有
する見開き用刷版Ｓを製造する方法に於いて、見開き用
版材Ｆの、これに形成する刷面Ｓの文字行に平行な方向
の一辺側を各レーザ走査ヘッドの主走査方向とほぼ平行
に配設し、前記各レーザ走査ヘッドを主走査方向へ、ま
た前記見開き用版材を各レーザ走査ヘッドの主走査方向
とほぼ垂直な方向へ移動させることにより、前記複数基
のレーザ走査ヘッドにより見開き用刷版の刷面の低密度
画素領域Ｚａ′・Ｚｂ′・Ｚｎ′と高密度画素領域Ｚ
ａ″・Ｚｂ″・Ｚｎ″を夫々個別に描画すると共に、前
記低密度画素領域と高密度画素領域との接合部Ｋを前記
刷面の低密度画素領域と高密度画素領域との間に設けた
間隙Ｊ内に位置させる構成としたことを特徴とするレー
ザ直接描画方式による新聞印刷用の見開き刷版の製造方
法。1. A method for manufacturing a double-sided printing plate S having drawing areas with different pixel densities by a laser direct drawing method by simultaneously operating a plurality of laser scanning heads H according to a drawing image signal from a computer. One side of the facing plate material F in the direction parallel to the character line of the printing surface S formed thereon is disposed substantially parallel to the main scanning direction of each laser scanning head, and the laser scanning heads are moved in the main scanning direction. By moving the spread plate material in a direction substantially perpendicular to the main scanning direction of each laser scanning head, the plurality of laser scanning heads cause the low-density pixel area Za 'on the printing surface of the spread printing plate. .Zb'.Zn 'and high-density pixel area Z
a ", Zb", and Zn "are individually drawn, and a joint K between the low-density pixel region and the high-density pixel region is provided between the low-density pixel region and the high-density pixel region on the printing surface. A method of manufacturing a spread printing plate for newspaper printing by a laser direct drawing method, wherein the printing plate is positioned within the gap J.
露光ドラムＲの外表面へ巻装すると共に、レーザ走査ヘ
ッドを２基又は４基設ける構成とした請求項１に記載の
レーザ直接描画方式による新聞印刷用の見開き刷版の製
造方法。2. The laser direct writing according to claim 1, wherein the spread plate material is wound around the outer surface of the exposure drum R of the rotary drum type exposure apparatus, and two or four laser scanning heads are provided. A method of manufacturing a spread printing plate for newspaper printing by the method.
置の平面状支持盤の上面へ装着すると共に、レーザ走査
ヘッドを２基又は４基設ける構成とした請求項１に記載
のレーザ直接描画方式による新聞印刷用の見開き刷版の
製造方法。3. The laser direct writing according to claim 1, wherein the spread plate material is mounted on the upper surface of the planar support plate of the support plate slide type exposure apparatus, and two or four laser scanning heads are provided. A method of manufacturing a spread printing plate for newspaper printing by the method.
芯とほぼ平行に配設し、前記見開き用刷材を露光ドラム
の外表面へ巻装するようにした請求項２に記載のレーザ
直接描画方式による新聞印刷用の見開き刷版の製造方
法。4. The spread printing material according to claim 2, wherein the long side of the spread plate material is disposed substantially parallel to the axis of the exposure drum, and the spread printing material is wound around the outer surface of the exposure drum. A method for manufacturing a spread printing plate for newspaper printing by a laser direct drawing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001139636A JP3400790B2 (en) | 2001-05-10 | 2001-05-10 | Manufacturing method of spread printing plate for newspaper printing by laser direct writing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001139636A JP3400790B2 (en) | 2001-05-10 | 2001-05-10 | Manufacturing method of spread printing plate for newspaper printing by laser direct writing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002333723A true JP2002333723A (en) | 2002-11-22 |
| JP3400790B2 JP3400790B2 (en) | 2003-04-28 |
Family
ID=18986380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001139636A Expired - Fee Related JP3400790B2 (en) | 2001-05-10 | 2001-05-10 | Manufacturing method of spread printing plate for newspaper printing by laser direct writing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3400790B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006250983A (en) * | 2005-03-08 | 2006-09-21 | Dainippon Screen Mfg Co Ltd | Platemaking apparatus for printing plate |
| DE102005045288A1 (en) * | 2005-09-22 | 2007-03-29 | Heidelberger Druckmaschinen Ag | Printing form e.g. offset printing form, illustration process controlling method, involves carrying out illustration of form using mechanical/optical parameter so that parameter value adapts for partial areas with raster systems on form |
| US7436540B2 (en) | 2001-09-13 | 2008-10-14 | Dainippon Screen Mgf. Co., Ltd. | Image recorder having more than one recording head and image recording system containing the image recorder |
-
2001
- 2001-05-10 JP JP2001139636A patent/JP3400790B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7436540B2 (en) | 2001-09-13 | 2008-10-14 | Dainippon Screen Mgf. Co., Ltd. | Image recorder having more than one recording head and image recording system containing the image recorder |
| JP2006250983A (en) * | 2005-03-08 | 2006-09-21 | Dainippon Screen Mfg Co Ltd | Platemaking apparatus for printing plate |
| JP4703222B2 (en) * | 2005-03-08 | 2011-06-15 | 大日本スクリーン製造株式会社 | Printing plate making equipment |
| DE102005045288A1 (en) * | 2005-09-22 | 2007-03-29 | Heidelberger Druckmaschinen Ag | Printing form e.g. offset printing form, illustration process controlling method, involves carrying out illustration of form using mechanical/optical parameter so that parameter value adapts for partial areas with raster systems on form |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3400790B2 (en) | 2003-04-28 |
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