Averaging Pneumatic Tension Transducer Head
Original Publication Date: 1988-Feb-01
Included in the Prior Art Database: 2005-Feb-14
A test head is disclosed for measuring tape tension in connection with drive testing. In previous testing techniques, a flat tape with low tension gradient and careful inlet pressure control of air under the tape was required. The present design increases tension-measuring accuracy without additional cost by utilizing pneumatic averaging. In Figs. 1 and 2, the head structure is illustrated including a head housing having a sensing transducer 12 mounted therein. The transducer has a curved upper surface adapted to follow the contour of tape at a low wrap angle and is provided with two internal chambers 16, 17 having ports 18 formed therein for supplying air to the air-bearing surface under the tape. Chambers 16, 17 also communicate with a supply port 21 and an inlet 22 which is connected to a supply pressure source.