| 摘要 |
An ink agitator element is mounted to a carriage and translated reciprocally lengthwise of a roller in the ink fountain. The carriage is driven by means of a cable connected to the piston of a pneumatic actuating cylinder. A 2-way control valve alternately pressurizes and exhausts opposite sides of the piston. Adjustable stop members set anywhere along the carriage path determine carriage travel distance in both directions by operating the valve to effect carriage reversal. Various ink agitating or stirring elements are disclosed. One such agitator element caused to swing at the end of its travel to thereby sweep ink toward the ends of the fountain roller besides urging ink into the roller nip as the agitator element translates.
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