| 摘要 |
PURPOSE: To provide an inexpensive oscillator having a simpler structure than a conventional one and applicable to the roller of an existing printing press. CONSTITUTION: A roller 10 has a cylindrical outer core 12 rotatable about a stationary shaft 14 and the oscillator apparatus is connected to a supply 46 for providing a pressurized medium. The oscillator apparatus has at least one reciprocating assembly 30, 32 having a substantially stationary portion attached to the stationary shaft 14 and a movable portion attached to the outer core 12, the reciprocating assembly 30, 32 also having at least first and second ports 52, 54 connected to the supply 46. The supply 46 alternately provides the pressurized medium to the first and second ports 52, 54 to activate the reciprocating assembly 30, 32 thus imparting oscillation. |
