水舟

US3492262(JP, I Mer)
"[0029] The exchange of a roller, cleaning of the water tank, and so on influence greatly the conditions of the print unit 10. When the conditions of the print unit 10 have greatly changed, it is advantageous to initialize the parameters B, V, F, R."

 印刷ユニット１０中のローラの交換、水舟の洗浄等を行うと、印刷ユニット１０の状態は大きく変化する。印刷ユニット１０の状態が大きく変化すると、パラメータB,V,F,Rを初期化することが好ましい。

Offset printing

US4813354
"More particularly, this invention provides a dampening system for an offset printing apparatus or the like, which includes means defining a water fountain（＊水舟）, a fountain roller positioned so as to be partly immersed in water held in the water fountain, and a metering roller of which the axis is pivotally mounted for swinging movement about the axis of the fountain roller The metering roller is adapted to remain in contact with the fountain roller as it pivots about the fountain roller. The system further includes a form roller and drive means for positively rotating the form roller, and an oscillator roller in contact with the form roller. The system further includes means by which water can pass from the metering roller to the oscillator roller, the means being such that the metering roller is pressed by gravity against the surface of a receiving roller of which the axis lies in a horizontal plane below the horizontal plane containing the axis of the metering roller. Motor means are provided for driving the fountain roller in rotation."

"In FIG. 2, a dotted outline 45 shows the position of a water fountain adapted to hold water into which the fountain roller can be partly immersed.

In a preferred method of operation, the fountain roller 26 would be driven at a slower speed than the rotational speed of the metering roller. The latter tends to rotate at the surface speed of the form roller, transmitted through the oscillator roller. The form roller is driven more quickly than the fountain roller."


US4708058
"In some instances, dampening systems have a roller in contact with the plate, and the roller is provided with an outer sleeve comprising a relatively soft cloth material. During operation of the press, dampening fluid soaks into the cloth and the sleeve is thereafter operable as a reservoir for the fluid, such as is particularly desirable where a ductor roller is used to intermittently supply dampening fluid from a water pan （＊水舟？）to the cloth covered roller. However, the use of a cloth sleeve prevents the nip between the cloth covered roller and the adjacent plate cylinder from uniformly smoothing the dampening fluid over the entire area of the roller as well as the outer surface of the plate cylinder. Unless the dampening fluid is evenly distributed to the plate, however, water spots will become apparent on the printed image, and such accumulations of water are generally difficult to quickly remove from the rollers of the press and, at the same time, a large quantity of paper from such press runs may have to be discarded because of the resulting poor quality image. Water spotting is particularly a problem at high press speeds and when relatively fine quality printing is sought. The paper sleeve is also known to cause slippage between the covered roller and any adjacent rollers and this slippage, as can be understood, further hinders the uniform distribution of dampening fluid across the rollers."

"offset printing, dampening solution and dampening units"

水舟：water fountain

water pan, water reservoir, water tray, water tank