| 摘要 |
An ink fountain for a printing press having a sub-frame which is mounted on the main frame of the press and which cooperates with a stationary fountain roller. A fountain blade is secured to the sub-frame with provision, interposed between the sub-frame and the blade, for establishing the thickness of ink film fed by the balde when the sub-frame occupies a reference position. The sub-frame has a hinge connection with the main frame for rocking movement about an axis remote from the tip of the blade between the reference position and a downwardly angled position in which an enlarged clearance gap is created at the tip of the blade, with the resulting rush of ink therethrough clearing the tip of the blade of contamination by accumulated particles of dirt or other impurities. A rotatable cam on the main frame having a plurality of similarly shaped lobes cooperates with a cam follower on the sub-frame so that when the cam is rotated the sub-frame oscillates back and forth between its reference position and its angled position. An auxiliary doctor blade is moveable into engagement with the fountain roller to divert the contaminated ink. |
