Shim adjustable pressure members for magnetic tape transducing devices

Abstract

Abstract A pressure member for pressing a magnetic tape against the tape head of a magnetic tape transducing device is disclosed. The pressure member comprises a rotatable ring of resilient material which is urged towards the tape head so as to compress the resilient material. Preferably, the ring of resilient material is supported around the circumference of a hollow cylinder of rigid material which is rotatably mounted on an inner stationary cylinder which, in turn, is nonrotatably mounted on a fixed shaft having a noncircular cross section. The inner stationary cylinder is provided with a noncircular, preferably rectangular, axial bore which is complementary to the noncircular cross section of the fixed shaft. The rectangular complementary cross sections of the fixed shaft and the axial bore of the inner stationary cylinder are so arranged that gaps are formed between walls of the shaft and walls of the complementary rectangular bore. The spacing between the ring of resilient material and the tape head is adjusted by placing shims in the gaps so as to vary the position of the ring of resilient material in a direction or directions perpendicular to the longitudinal axis of the shaft. The invention is especially applicable to magnetic tape transducing devices of the kind in which a cassette is operatively engageable in a receptacle in which the tape head is mounted, the pressure member being mounted on the cassette and the resilient ring being urged towards the tape head when the cassette is operatively engaged in the receptacle.

Inventors

• 👤 Edric Raymond Brooke

Bibliographic Details