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公开(公告)号：US3842735A
公开(公告)日：1974-10-22
申请号：US31772372
申请日：1972-12-22
CPC分类号： B41F35/002 , B41F7/36 , B41F35/04
摘要： Lithographic dampener has a hydrophilic roller for supplying dampening solution to a resilient dampener form roller capable of carrying ink and dampening solution. The dampener form roller is driven primarily by surface contact from the printing plate when in printing position, and driven solely by surface contact with a driven rider roller when in non-printing position. The rider roller is always maintained in contact with the dampener form roller during normal press operation, in both printing and nonprinting positions. An ink form roller of the inking system has three positions: a printing position, a first throw-off position, and a second throw-off or ''''wash-up'''' position wherein it contacts the rider roller of the dampener when the latter is in its non-printing position, whereby cleaning solution applied to the rolls of the inker is also transmitted to the dampener form roller for simultaneously cleaning the inked rollers of both the inker and dampener.
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