| 摘要 |
An apparatus for guiding and changing the direction of a moving web without contacting the web itself, and for preventing contact at the apparatus entry and, optionally exit points. The apparatus includes a reduced pressure box having a source of reduced pressure connected thereto, a convex web guide support, a portion of which is partially contained within the reduced pressure box, and an entry baffle having a top surface. The angle between tangents through reference points on the web guide support and the distance between the web guide support and the entry baffle are adjusted to prevent contact between the web and the reduced pressure box interior and entry baffle. The angle between tangents through reference points on the web guide support and the distance between the web guide support and the exit baffle may also be adjusted to prevent contact between the web and the reduced pressure box interior and exit baffle.
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