Advancing material of indeterminate length – Processes – By fluid current
Patent
1975-07-10
1978-01-31
Knowles, Allen N.
Advancing material of indeterminate length
Processes
By fluid current
226 97, 226196, B65H 1732
Patent
active
040711773
ABSTRACT:
An apparatus for guiding a span of high speed magnetic recording tape past a recording/transducing head. Pressurized air is utilized to lift the tape off of the guide thereby eliminating sliding friction between the apparatus and the tape. In addition, a pair of beveled flanges are provided on opposite sides of the path followed by the tape as it is transported, which are spaced apart at their base a distance less than the minimum width of the tape. In operation, an air film of substantially constant pressure is generated along the air chamber formed by the tape, guide, beveled flanges and tangent points where the tape enters and exits from the guide sufficient to lift the tape off of the guide to a point where its width substantially equals the horizontal distance between the beveled flanges, thereby maintaining the tape in a centered relationship with respect to the center line of the guide and impeding the airflow about the lateral edges of the tape. In this manner, the magnetic tape will remain in alignment with the recording/transducing head irrespective of manufacturing variations in its width.
REFERENCES:
patent: 2979829 (1961-04-01), Uhleen
patent: 3032246 (1962-05-01), Fritze
patent: 3087664 (1963-04-01), Streeter
BASF - Aktiengesellschaft
Knowles Allen N.
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