| 摘要 |
A single tier dryer section apparatus (10) is disclosed for drying a web (W) extending through a paper machine. The apparatus (10) includes a first dryer (12) and a dryer felt (F) extending around the first dryer (12) such that the web (W) is disposed between the felt (F) and the first dryer (12) for drying the web (W). A vacuum transfer roll (14) is disposed downstream relative to the first dryer (12) such that the web (W) and felt (F) extend contiguously from the first dryer (12) to and around the transfer roll (14) so that the felt (F) is disposed between the web (W) and the roll (14) during transit of the web (W) and felt (F) around the roll (14). A second dryer (16) is disposed downstream relative to the transfer roll (14) such that the web (W) and the felt (F) extend contiguously from the transfer roll (14) to and around the second dryer (16) so that the web (W) is disposed between the felt (F) and the second dryer (16) during transit of the web (W) and the felt (F) around the second dryer (16). The transfer roll (14) includes a perforate shell (18) such that when the roll (14) is connected to a source of partial vacuum (20), a partial vacuum is generated within the shell (18) for urging the web (W) into close conformity with the felt (F) and towards the perforate shell (18). The transfer roll (14) is also movable from a first location to a second location. The first location is closely adjacent to the dryers (12, 16) so that the partial vacuum urges the web (W) into conformity with the felt (F) for inhibiting fluttering of the web (W). The second location is farther away from the dryers (12, 16) than the first location so that damage to the first dryer (12) and the roll (14) in the vent of the web (W) wrapping around the first dryer (12) is inhibited. |
