Advancing material of indeterminate length – With material-responsive control means – To position material laterally
Patent
1989-04-28
1990-10-23
Hail, III, Joseph J.
Advancing material of indeterminate length
With material-responsive control means
To position material laterally
242 571, 226 21, B65H 2600
Patent
active
049645579
ABSTRACT:
Disclosed is a system for bidirectionally guiding web, such as tape in magnetic tape recording/reproducing apparatus. The system eliminates the necessity for edge guides, reduces stresses in web resulting in longer web life, and effects accurate tracking of the web as it is transported in opposite directions. The system includes a plurality of edgeless cylindrical guide rollers mounted on members which are pivoted together. The system includes a plurality of edge sensors and linear servo motors. The edge sensors measure the web edge position and the linear servo motors control the amount of rotation about a pivotal axis which coincides with the center line of a span of web. In this way, web edge position is controlled without any frictional sliding contact between the web and guiding rollers and without the use of edge guides which damage the web edge.
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Martin Stanley W.
Sarkisian Nancy L.
Bowen Paul T.
Datatape Incorporated
Hail III Joseph J.
Noval William F.
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