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The BST swivel roll guide consists of a fixed lower frame and a moveable upper frame, with one or two guiding rollers.
The upper frame moves around an imaginary pivot located on the infeed side outside the guiding device.
With incoming web path error, the guiding device swivels out to the side and thus transfers the outgoing web into a defined position on the next idler. The correction is already made in the infeed area.
The functional principle of this guiding device requires ade-
quate long infeed and exit paths.
Swivel roll guides are used where installation space is limited, the required threading of the web does not allow the use of a rotating frame guide or where the web is continually drifting away to the side (integral correction).
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