| 摘要 |
A suction drum device has a rotary suction drum that has air holes formed around its peripheral surface. A surface of a stationary sucking blowing block is tightly pressed on a side surface of the suction drum, so the side surface of the suction drum slides on the tight-pressed surface of the sucking blowing block. The side surface of the suction drum is formed with openings, each of which leads to a group of the vent holes. A sucking hole and a blowing hole are formed in the tight-pressed surface of the sucking blowing block, which are connected to a vacuum pump and an air blower respectively. As the suction drum rotates, a number of openings are connected to the sucking hole, so the air is sucked through the vent holes that lead to these openings. When one of the openings is connected to the blowing hole, the air is blown out through those vent holes which lead to the one opening. The tight-pressed surface of the sucking blowing block further has recesses and an endless groove surrounding the sucking hole for pooling lubricant. Endless grooves are also formed around the respective openings of the sliding surface of the suction drum, for catching the lubricant.
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