JPH0363951B2 - - Google Patents
Info
- Publication number
- JPH0363951B2 JPH0363951B2 JP25417785A JP25417785A JPH0363951B2 JP H0363951 B2 JPH0363951 B2 JP H0363951B2 JP 25417785 A JP25417785 A JP 25417785A JP 25417785 A JP25417785 A JP 25417785A JP H0363951 B2 JPH0363951 B2 JP H0363951B2
- Authority
- JP
- Japan
- Prior art keywords
- roller
- water
- plate
- water film
- plate cylinder
- 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.)
- Expired
Links
- 238000007639 printing Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 94
- 239000010408 film Substances 0.000 description 54
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/20—Details
- B41F7/24—Damping devices
- B41F7/26—Damping devices using transfer rollers
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は平版印刷機の湿し装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dampening device for a lithographic printing press.
従来の平版オフセツト印刷機を第７図に示す。
図において、１は版、２は版胴、３はゴムブラン
ケツト、４はゴム胴、５は紙、６は圧胴、７はブ
レード、８はインキ元ローラ、９はインキ呼出し
ローラ、１０はインキ練りローラ群、１１はイン
キ着けローラ、１２は水溜め、１３は水元ロー
ラ、１４はメタリングローラ、１５は水着けロー
ラ、１６はライダローラ、１７は版胴２の切欠き
部である。版１、ゴムブランケツト３はそれぞれ
版胴２、ゴム胴４の表面に取付けられる。紙５は
圧胴６の表面に順次送られる。インキ元ローラ８
とブレード７の間に溜められたインキはインキ元
ローラ８の回転によりインキ又ローラ８表面に送
られ、揺動するインキ呼出しローラ９によりイン
キ練りローラ群１０へ間欠的に送られる。同イン
キ練りローラ群１０へ送られたインキは、次第に
均一な薄膜におしのばされて、インキ着けローラ
１１を介して版１へ供給される。水溜め１２に溜
められた湿し水は水元ローラ１３の回転により水
膜として引き出され、メタリングローラ１４と水
元ローラ１３とのニツプにより水膜を絞り、ニツ
プ出口では、数μｍ程度の水膜にされる。この数
μｍ程度の水膜は水着けローラ１５に転写され、
最後に水着けローラ１５から版１面へ1μｍ程度
の水膜として供給される。又、水着けローラ１５
の外径は版胴２の切欠部１７に何ら関連なく決め
られていた。
A conventional lithographic offset printing machine is shown in FIG.
In the figure, 1 is a plate, 2 is a plate cylinder, 3 is a rubber blanket, 4 is a rubber cylinder, 5 is paper, 6 is an impression cylinder, 7 is a blade, 8 is an ink source roller, 9 is an ink feed roller, 10 is Ink mixing roller group, 11 is an ink forming roller, 12 is a water reservoir, 13 is a water source roller, 14 is a metering roller, 15 is a water forming roller, 16 is a rider roller, and 17 is a notch in the plate cylinder 2. A plate 1 and a rubber blanket 3 are attached to the surfaces of a plate cylinder 2 and a blanket cylinder 4, respectively. The paper 5 is sequentially fed onto the surface of the impression cylinder 6. Ink source roller 8
The ink accumulated between the ink source roller 8 and the blade 7 is sent to the surface of the ink roller 8 by the rotation of the ink source roller 8, and is intermittently sent to the ink mixing roller group 10 by the swinging ink feed roller 9. The ink sent to the ink mixing roller group 10 is gradually spread into a uniform thin film and supplied to the plate 1 via the ink forming roller 11. The dampening water stored in the water reservoir 12 is drawn out as a water film by the rotation of the water source roller 13, and the water film is squeezed by the nip between the metering roller 14 and the water source roller 13, and at the nip exit, a film of about several micrometers is drawn out. turned into a water film. This water film of approximately several μm is transferred to the water forming roller 15,
Finally, water is supplied from the water forming roller 15 to the surface of the plate as a water film of about 1 μm. Also, swimsuit roller 15
The outer diameter of the plate cylinder 2 was determined without regard to the notch 17 of the plate cylinder 2.
〔発明が解決しようとする問題点〕
前記第７図に示す平版オフセツト印刷機では、
版１を取り付けるために、版胴２表面の一部に切
欠き部１７がある。このため、水着けローラ１５
から版１面へ湿し水を供給する際に、版１面と等
速度で回転する水着けローラ１５が切欠き部１７
に接触して、水着けローラ１５上の水が版１面に
転写されず、版１面に水を供給した場合の膜厚よ
りも厚い水膜が水着けローラ１５上に残り、その
ままの状態でライダーローラ１６とのニツプに入
り込む。この水膜は、ライダローラ１６とメタリ
ングローラ１４とのニツプを通過したのち、版１
面に接する。このときには、ライダローラ１６と
メタリングローラ１４とのそれぞれのニツプによ
り、幾分均らされるにしても、平均の膜厚よりも
かなり厚い水膜が版１面に供給されてしまい、こ
の結果、版１面上に供給された水膜の厚さの回転
方向の分布は、第８図のようになる。つまり切欠
き開始位置（第７図のＡ点参照）から水着けロー
ラ１５の１回転及び１回転円周長＋切欠き部円周
方向長の位置に膜厚の強い部分が発生する。なお
第８図は、電子計算機を用いて行つたシミユレー
シヨンの結果である。[Problems to be solved by the invention] The lithographic offset printing machine shown in FIG. 7 has the following problems:
A notch 17 is provided in a part of the surface of the plate cylinder 2 in order to attach the plate 1 thereto. For this reason, the swim roller 15
When supplying dampening water to the first surface of the plate, the dampening roller 15, which rotates at the same speed as the first surface of the plate, passes through the notch 17.
The water on the water forming roller 15 is not transferred to the first surface of the plate, and a water film that is thicker than the film thickness when water is supplied to the first surface of the plate remains on the water forming roller 15, and remains as it is. and enters the nip with rider roller 16. This water film passes through the nip between the rider roller 16 and the metering roller 14, and then passes through the plate 1.
touch the surface. At this time, a water film that is considerably thicker than the average film thickness is supplied to the surface of the plate, even if it is somewhat evened out by the respective nips of the rider roller 16 and the metering roller 14, and as a result, The distribution of the thickness of the water film supplied onto the surface of the printing plate in the rotational direction is as shown in FIG. In other words, a thick portion occurs at a position corresponding to one rotation of the wet roller 15 and one rotation circumferential length + circumferential length of the notch from the notch starting position (see point A in FIG. 7). Note that FIG. 8 shows the results of a simulation performed using an electronic computer.
上記第４図に示すインキ着けローラ１１から版
１面に供給されるインキの膜厚は、版１面上の湿
し水膜の厚さに略反比例する。このため、第８図
に示すような水膜の厚い段差は、版１面に供給さ
れるインキ膜に段差を生じ、それがゴムブラケツ
ト３を介して紙５に転写されるので、結局、印刷
物にインキ濃度の差となつて表れる。このインキ
濃度の差は、目と呼ばれ、特に湿し装置に起因し
ていることから、水目と呼ばれている。印刷物で
は、この水目の強さ、即ち、インキ濃度の差が視
覚により認識できる程度に大きくなる（印刷障害
を生じる）という問題があつた。 The film thickness of the ink supplied from the ink forming roller 11 to the plate surface shown in FIG. 4 is approximately inversely proportional to the thickness of the dampening water film on the plate surface. For this reason, a thick step in the water film as shown in FIG. 8 causes a step in the ink film supplied to the surface of the plate, which is transferred to the paper 5 via the rubber bracket 3, resulting in a printed matter. This appears as a difference in ink density. This difference in ink density is called a water mark, and is particularly caused by the dampening device, so it is called a water mark. In printed matter, there is a problem in that the strength of the water marks, that is, the difference in ink density, becomes large enough to be visually perceptible (causing printing failure).
本発明は前記の問題点に対処するもので、版胴
表面の切欠き開始位置と版胴の中心とを結ぶ直線
と、版胴表面の切欠き終了位置と版胴の中心とを
結ぶ直線とのなす角度をθとすると、水着けロー
ラと同水着けローラと接しているライダローラの
外径をそれぞれ〔（版面の外径）×θ／360〕×0.95
から〔（版面の外径）×θ／360〕×1.05の範囲内と
したことを特徴とする平版印刷機の湿し装置に係
わり、その目的とする処は、水目と呼ばれる印刷
障害を解消できる改良された平版印刷機の湿し装
置を供する点にある。
The present invention addresses the above-mentioned problems, and has two lines: a straight line connecting the notch start position on the plate cylinder surface and the center of the plate cylinder, and a straight line connecting the notch end position on the plate cylinder surface and the center of the plate cylinder. If the angle formed by θ is θ, then the outer diameter of the water-forming roller and the rider roller that is in contact with the water-forming roller is [(outer diameter of the printing plate) x θ/360] x 0.95.
This relates to a dampening device for a lithographic printing press, which is characterized by being within the range of [(outer diameter of plate surface) x θ/360] x 1.05, and its purpose is to eliminate printing defects called water marks. An object of the present invention is to provide an improved dampening device for a lithographic printing press.
本発明の平版印刷機の湿し装置は前記のように
構成され、水着けローラの円周長をそれぞれ版胴
の切欠き部の円周長に略一致するように水着けロ
ーラの外径を設定しており、水着けローラが版胴
の切欠き開始位置から１回転して、版胴に接する
のは切欠き終了位置であり、この結果、水着けロ
ーラが版胴に再接触するところでの急激な水膜厚
さ変動がなくなり、水膜厚さの最大と最小の巾が
小さくなり、それによりインキ膜厚の変動が少な
くなる。更に本発明ではライダローラも同様な構
成をしており、水着けローラ表面と同一周期とな
るので水着けローラ表面の水膜厚さ変動に余分な
周波数成分の乱れが入らない。
The dampening device of the lithographic printing press of the present invention is constructed as described above, and the outer diameter of the dampening roller is adjusted so that the circumferential length of the dampening roller approximately corresponds to the circumferential length of the cutout portion of the plate cylinder. The position where the dampening roller makes one rotation from the notch start position of the plate cylinder and touches the plate cylinder is the notch end position, and as a result, the position where the dampening roller contacts the plate cylinder again is Rapid fluctuations in the water film thickness are eliminated, and the maximum and minimum widths of the water film thickness are reduced, thereby reducing fluctuations in the ink film thickness. Further, in the present invention, the rider roller has a similar structure and has the same period as the surface of the water application roller, so that no disturbance of extra frequency components occurs in fluctuations in the water film thickness on the surface of the water application roller.
次に本発明の平版印刷機の湿し装置を第１図に
示す一実施例により説明する。図において１は
版、２は版胴、１１はインキ着けローラ、１２は
水溜め、１３は水元ローラ、１４はメタリングロ
ーラ、１５′は本発明で最も特徴とする水着けロ
ーラ、１６′はライダローラ、１７は版胴２の切
欠き部、１８は湿し水である。水着けローラ１５
とライダローラ１６は版１を表面に装着した版胴
２と同一周速で回転し、水元ローラ１３とメタリ
ングローラ１４は、版１を表面に装着した版胴２
よりも低い周速度で回転する。つまり版胴２の周
速度に無関係に水元ローラ１３とメタリングロー
ラ１４との周速度が決定される。本実施例では、
水着けローラ１５′とライダローラ１６′の外径が
次のように定められている。
Next, a dampening device for a lithographic printing press according to the present invention will be explained with reference to an embodiment shown in FIG. In the figure, 1 is a plate, 2 is a plate cylinder, 11 is an ink forming roller, 12 is a water reservoir, 13 is a water base roller, 14 is a metering roller, 15' is a water forming roller that is the most characteristic of the present invention, and 16' 1 is a rider roller, 17 is a notch in the plate cylinder 2, and 18 is a dampening solution. Swimsuit roller 15
The rider roller 16 rotates at the same circumferential speed as the plate cylinder 2 on which the plate 1 is mounted, and the water head roller 13 and the metering roller 14 rotate at the same circumferential speed as the plate cylinder 2 on which the plate 1 is mounted.
rotates at a peripheral speed lower than that of In other words, the peripheral speeds of the water head roller 13 and the metering roller 14 are determined regardless of the peripheral speed of the plate cylinder 2. In this example,
The outer diameters of the water application roller 15' and the rider roller 16' are determined as follows.
（水着けローラ１５′の外径）＝（版１面の外径）
×θ／360 ……
（ライダローラ１６′の外径）＝（版１面の外径
×θ／360 ……
但しθは、第１図に示すように切欠き部１７の
角度である。具体的には、版胴２表面の切欠き開
始位置Ａと版胴２の中心０とを結ぶ直線と、版胴
２表面の切欠き終了位置Ｂと版胴２の中心０とを
結ぶ直線とのなす角度である。(Outer diameter of water forming roller 15') = (Outer diameter of plate 1 side) × θ/360 ... (Outer diameter of rider roller 16') = (Outer diameter of plate 1 side × θ/360... However, θ is , is the angle of the notch 17 as shown in FIG. This is the angle formed between the notch end position B and the straight line connecting the center 0 of the plate cylinder 2.
次に前記第１図に示す平版印刷機の湿し装置の
作用を具体的に説明する。湿し水１８が水溜め１
２に溜められ、水元ローラ１３の回転により、水
膜として引き出される。このときの水膜厚さは、
100μｍ程度である。次にこの水膜は、メタリン
グローラ１４の水元ローラ１３とによるリツプに
入り、そこでこの厚い水膜が絞られ、ニツプ出口
では、数μｍ程度の水膜になる。この水膜は、水
着けローラ１５′に転写され、最後に水着けロー
ラ１５′から版１面に数μｍ程度の水膜として供
給される。このとき、ライダローラ１６′は、水
着けローラ１５′上に残つた供給後の水膜の膜厚
を回転方向に均一に均らす。 Next, the operation of the dampening device of the lithographic printing press shown in FIG. 1 will be explained in detail. Dampening water 18 is in the water reservoir 1
2, and is drawn out as a water film by the rotation of the water source roller 13. The water film thickness at this time is
It is about 100 μm. Next, this water film enters the lip formed by the water base roller 13 of the metering roller 14, where the thick water film is squeezed and becomes a water film of about several micrometers at the nip exit. This water film is transferred to the water forming roller 15', and finally, the water film is supplied from the water forming roller 15' to the surface of the plate as a water film of about several μm. At this time, the rider roller 16' evens out the thickness of the supplied water film remaining on the water applicator roller 15' in the rotational direction.
版胴２の切欠き部１７が水着けローラ１５′部
分を通る時、水着けローラ１５′上の水は版１に
転写されず、一方でメタリングローラ１４から供
給されるため、普通よりも厚い水膜が水着けロー
ラ１５′上に残るが、本実施例では、水着けロー
ラ１５′が版胴２の切欠き開始位置Ａから１回転
して、版１面に次に接するのは、切欠き終了位置
Ｂである。そのため、第８図に示すように従来の
装置にあつた水膜のＡ点からの水着けローラ１５
の１回転円周長位置での急激な膜厚変動が版１上
で起らない。従つて、版１上での水膜厚の最大と
最小の巾が従来より低下する。この状態を第２図
に示している。又、この時、ライダローラの外径
を水着けローラの外径と同一としているので、水
着けローラ上の水膜厚の変動周期とライダローラ
上の水膜厚の変動周期が一致し、そのため水着ロ
ーラ上の水膜厚の変動に余分な周波数成分の乱れ
が入らない。それにより個々の段差がより小さく
なるとともに版面上の水膜厚さの最大と最小の巾
もより小さくなる。この状態を第４図に示してい
る。 When the notch 17 of the plate cylinder 2 passes through the water applicator roller 15', the water on the applicator roller 15' is not transferred to the plate 1, but on the other hand, it is supplied from the metering roller 14. A thick water film remains on the water form roller 15', but in this embodiment, the water form roller 15' makes one revolution from the notch starting position A of the plate cylinder 2 and contacts the surface of the plate 1 next time. This is the notch end position B. Therefore, as shown in FIG.
A sudden change in film thickness does not occur on the plate 1 at the circumferential length position of one rotation. Therefore, the maximum and minimum widths of the water film thickness on the plate 1 are reduced compared to the conventional method. This state is shown in FIG. In addition, at this time, since the outer diameter of the rider roller is the same as the outer diameter of the swimsuit roller, the period of variation in the water film thickness on the swimsuit roller matches the cycle of variation in the water film thickness on the rider roller, and therefore the swimsuit roller No extra frequency component disturbance occurs in the fluctuation of the water film thickness above. As a result, the individual step differences become smaller, and the maximum and minimum widths of the water film thickness on the printing plate also become smaller. This state is shown in FIG.
更に、水着けローラ１５′の外径を上記式に
より求めた径に設定した場合について、ライダロ
ーラ１６′の外径を式により求めた本実施例の
径を中心に太くしたり、細くしたりした場合の水
膜の段差の変化を電子計算機を用いて計算した結
果を第３図に示した。第３図では、各段差の中で
最も強いものの変化を１９により、水膜分布の最
大膜厚と最小膜厚の差分の変化を２０で示してい
る。第３図からライダローラ１６′の外径を式
にて決まる値とした場合が段差が最小によるのが
わかる。なお、各種印刷機械の構成上の制約か
ら、水着けローラ１５′とライダローラ１６′が上
記、式で定める径にとれない場合には若干の
効果は低下するが、、式の径よりも±５％程
度の範囲で径を大きくしたり小さくしても良いと
考えられる。 Furthermore, in the case where the outer diameter of the wet roller 15' is set to the diameter determined by the above formula, the outer diameter of the rider roller 16' is set to be thicker or thinner than the diameter of this embodiment determined by the formula. Figure 3 shows the results of calculating the change in the water film level difference using an electronic computer. In FIG. 3, 19 indicates the strongest change among the steps, and 20 indicates the change in the difference between the maximum and minimum thickness of the water film distribution. It can be seen from FIG. 3 that the level difference is minimized when the outer diameter of the rider roller 16' is determined by the formula. Note that if the diameter of the wet roller 15' and rider roller 16' cannot be set to the diameter determined by the formula above due to constraints on the configuration of various printing machines, the effectiveness will decrease slightly; It is considered that the diameter may be increased or decreased within a range of about %.
このように、個々の段差の大きさが小さくなつ
たことにより、従来の場合に比べて水目がほとん
ど目立たなくなつたし、水膜厚さの差が小さくな
つたので、湿し水の供給量の調整が容易になり、
印刷品質も向上した。すなわち、版面に非画線部
にインキが付着しない限界水膜厚に対して従来の
ように水膜分布の最小膜厚と最小膜厚の変化が大
きいと、最小の膜厚をこの限界水膜厚に一致させ
る必要があり、最大の膜厚の個所では、逆に水が
多すぎて、網点が太くなり過ぎる等の現象を生じ
て、印刷品質の低下をきたしていたが、本実施例
の場合には、水膜分布の最大膜厚と最小膜厚の変
化が小さくて、湿し水の供給量の調節が容易にな
り、印刷品質も向上した。 In this way, because the size of each step has become smaller, the water spots are almost invisible compared to the conventional case, and the difference in water film thickness has become smaller, making it easier to supply dampening water. It becomes easier to adjust the amount,
Print quality has also improved. In other words, if there is a large change in the minimum film thickness of the water film distribution compared to the critical water film thickness at which ink does not adhere to non-image areas on the printing plate, as in the past, then the minimum film thickness is set to this critical water film thickness. However, in the area where the film thickness is maximum, there is too much water, resulting in phenomena such as halftone dots becoming too thick, resulting in a decline in print quality. In the case of , the change in the maximum and minimum thickness of the water film distribution was small, making it easier to adjust the amount of dampening water supplied and improving the print quality.
次に第５図に示す本発明の第２実施例について
説明する。本実施例では前記第１実施例のものに
式て定められる外径を有する第２のライダロー
ラ２１を水着けローラに接して設けたものであ
る。このライダローラ２１の追加により、膜厚の
ならし効果がより増強され、かつ水着けローラ１
５′上の水膜厚の変動に余分な周波数成分の乱れ
が入ることを防止できる。本実施例による版面上
の供給水膜の変化を第６図に示す。第６図は第２
図及び第４図のものと同一運転条件について電子
計算機によりシミユレーシヨンしたものである。
第６図から、個々の段差の大きさ、水膜厚さ分布
の最大と最小と巾が更に小さくなつており、水目
の低減、印刷品質の向上がより効果的であること
がわかる。 Next, a second embodiment of the present invention shown in FIG. 5 will be described. In this embodiment, a second rider roller 21 having an outer diameter determined by the formula of that of the first embodiment is provided in contact with the water application roller. By adding the rider roller 21, the effect of leveling the film thickness is further enhanced, and the water application roller 1
It is possible to prevent disturbances of unnecessary frequency components from occurring in fluctuations in the water film thickness on 5'. FIG. 6 shows changes in the supplied water film on the printing plate according to this example. Figure 6 is the second
A computer simulation was performed under the same operating conditions as those shown in Figs. and 4.
From FIG. 6, it can be seen that the size of each step and the maximum, minimum, and width of the water film thickness distribution are further reduced, making it more effective to reduce water marks and improve print quality.
以上説明したように、本発明によると版面に供
給される水膜厚の最大と最小の巾が低減されるの
で水目と呼ばれる印刷障害が解消できるし、湿し
水の供給量の調節が容易になることもあいまつて
印刷品質が向上する。
As explained above, according to the present invention, the maximum and minimum widths of the water film supplied to the printing plate are reduced, so printing problems called water marks can be eliminated, and the amount of dampening water supplied can be easily adjusted. This also improves print quality.
第１図は本発明の第１実施例を示す側面図、第
２図は水着けローラのみの場合で版面上の供給水
膜と回転方向での版面上の位置との関係を示す説
明図、第３図は版面上の供給水膜厚の段差とライ
ダローラ径との関係を示す説明図、第４図は水着
けローラとライダローラともに作用した場合の第
２図と同様な関係を示す説明図、第５図は本発明
の第２実施例を示す側面図、第６図は第４図と同
様な関係を示す説明図、第７図は従来の平版印刷
機の湿し装置を示す側面図、第８図は第７図での
版面上の供給水膜と切欠き開始位置及び切欠き終
了位置との関係を示す説明図である。
２……版胴、１５′……水着けローラ、１６′，
２１……ライダローラ、１７……切欠き。
FIG. 1 is a side view showing the first embodiment of the present invention, FIG. 2 is an explanatory diagram showing the relationship between the supplied water film on the printing plate and the position on the printing plate in the rotation direction in the case of only a water forming roller, FIG. 3 is an explanatory diagram showing the relationship between the level difference in the thickness of the supplied water film on the printing plate and the rider roller diameter, and FIG. 4 is an explanatory diagram showing the same relationship as FIG. 2 when both the water forming roller and the rider roller act. FIG. 5 is a side view showing a second embodiment of the present invention, FIG. 6 is an explanatory view showing the same relationship as FIG. 4, and FIG. 7 is a side view showing a dampening device of a conventional lithographic printing press. FIG. 8 is an explanatory diagram showing the relationship between the supplied water film on the printing plate and the notch start position and notch end position in FIG. 7. 2...Plate cylinder, 15'...Water roller, 16',
21... Rider roller, 17... Notch.
Claims (1)
結ぶ直線と、版胴表面の切欠き終了位置と版胴の
中心とを結ぶ直線とのなす角度をθとすると、水
着けローラと同水着けローラと接しているライダ
ローラの外径をそれぞれ〔（版面の外径）×θ／
360〕×0.95から〔（版面の外径）×θ／360〕×1.05
の範囲内としたことを特徴とする平版印刷機の湿
し装置。[Claims] 1. The angle between the straight line connecting the notch start position on the plate cylinder surface and the center of the plate cylinder and the straight line connecting the notch end position on the plate cylinder surface and the center of the plate cylinder is defined as θ. Then, the outer diameter of the water-forming roller and the rider roller that is in contact with the water-forming roller are respectively [(outer diameter of the printing plate) x θ/
360〕×0.95 to [(outer diameter of plate surface)×θ／360〕×1.05
A dampening device for a lithographic printing press, characterized in that the dampening device is within the range of.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25417785A JPS62113551A (en) | 1985-11-13 | 1985-11-13 | Dampening device of lithographic printer |
| DE19863638813 DE3638813A1 (en) | 1985-11-13 | 1986-11-13 | Damping unit for a lithographic printing press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25417785A JPS62113551A (en) | 1985-11-13 | 1985-11-13 | Dampening device of lithographic printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62113551A JPS62113551A (en) | 1987-05-25 |
| JPH0363951B2 true JPH0363951B2 (en) | 1991-10-03 |
Family
ID=17261298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25417785A Granted JPS62113551A (en) | 1985-11-13 | 1985-11-13 | Dampening device of lithographic printer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62113551A (en) |
| DE (1) | DE3638813A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732693A1 (en) * | 1987-09-29 | 1989-04-13 | Roland Man Druckmasch | Forme cylinder of a sheet-fed rotary offset printing machine |
| DE3811288A1 (en) * | 1988-04-02 | 1989-10-19 | Roland Man Druckmasch | DAMPING UNIT ON A ROLLING ROTATION OFFSET PRINTING MACHINE |
| DE19911568A1 (en) | 1999-03-16 | 2000-09-21 | Heidelberger Druckmasch Ag | Process for dampening a planographic printing form and dampening unit of a planographic printing machine |
| DE10020511A1 (en) * | 2000-04-26 | 2001-11-15 | Roland Man Druckmasch | Dampening unit for an offset printing machine |
| DE10020512A1 (en) * | 2000-04-26 | 2001-11-15 | Roland Man Druckmasch | Dosing system for a coating unit in a printing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD144155B1 (en) * | 1979-06-06 | 1988-04-27 | Hans Johne | WETTING WORK FOR ROTATION OFFSET PRINTING MACHINES |
| GB2082121B (en) * | 1980-08-14 | 1984-11-28 | Komori Printing Mach | Water supply apparatus for printing press |
-
1985
- 1985-11-13 JP JP25417785A patent/JPS62113551A/en active Granted
-
1986
- 1986-11-13 DE DE19863638813 patent/DE3638813A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3638813A1 (en) | 1987-05-14 |
| DE3638813C2 (en) | 1988-12-08 |
| JPS62113551A (en) | 1987-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0236387B2 (en) | ||
| JP2977540B2 (en) | Shortening ink device | |
| JPH03268945A (en) | Ink device | |
| US3096710A (en) | Dampening device for lithographic printing press | |
| JPH0363951B2 (en) | ||
| US5372067A (en) | Keyless lithography with single printing fluid | |
| JP2878272B2 (en) | Dampening unit for offset printing press | |
| JP2529878Y2 (en) | Keyless printing machine | |
| JPH0739643Y2 (en) | Roller for printing mechanism of rotary printing machine | |
| US4130056A (en) | Lithographic moisture system and method | |
| US4437406A (en) | Inking apparatus for an offset press | |
| JPS6273945A (en) | Moistener for lithographic printer | |
| JPH0346308B2 (en) | ||
| JP2898597B2 (en) | Dampening device for offset printing press | |
| JPH09314810A (en) | Roller of printing machine | |
| JP2882966B2 (en) | Humidifier and method for offset printing press | |
| JP4109024B2 (en) | Liquid supply device | |
| JPS58208056A (en) | Water supplier for offset print plate | |
| JPH06305109A (en) | Humidifier for offset printing machine and humidification method | |
| JPH07205391A (en) | Printing mechanism of offset rotary press | |
| JPH0612927Y2 (en) | Water removing device for measuring rolls such as mesh rolls | |
| JPS6212606Y2 (en) | ||
| JPS6221544A (en) | Device for pre-emulsifying ink emulsion in offset press | |
| JP2535531Y2 (en) | Printer | |
| JPH0259058B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |