| 摘要 |
An apparatus for transporting a sheet of a flexible material between a first and a second position. The apparatus includes an elongated frame and an air-pervious endless belt movably mounted on first and second pulleys positioned at each end of the frame. The belt has its upper rung travelling from the first pulley, adjacent the first position, to the second pulley, adjacent the second position, and is arranged to receive a lead strip of the sheet from the first position. A vacuum chest having a perforated top extends longitudinally of and below the upper rung of the belt. There are means for evacuating air from the chest in order to apply a vacuum at the undersurface of the belt and thereby cause the lead strip to cling to the belt. The apparatus has means defining an opening where the sheet leaves the belt and an air jet means able to direct air through the opening. The air is directed contrary to the direction of movement of the belt and with a velocity sufficient both to overcome any gripping effect of air entrained within the air-pervious belt and to lift the sheet of flexible material. |
