Browse Prior Art Database

Cassette Tape Drive

IP.com Disclosure Number: IPCOM000076310D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Farmer, FJ: AUTHOR [+2]

Abstract

This device utilizes a master tape drive system to provide tape speed control and tape tension control for a reel-to-reel tape cassette) Drive and braking functions are accomplished by mechanical means in conjunction with the master tape, rather than by contact with the oxide coated cassette tape.

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Cassette Tape Drive

This device utilizes a master tape drive system to provide tape speed control and tape tension control for a reel-to-reel tape cassette) Drive and braking functions are accomplished by mechanical means in conjunction with the master tape, rather than by contact with the oxide coated cassette tape.

As illustrated, oxide coated tape is to be moved from cassette reel CR 1 to cassette reel CR 2. A reversible drive motor rotates a drive capstan to transfer tape from master reel MR 1 to master reel MR 2, which contain the master tape) A master drive pulley and belt drive P2, for example, in the counterclockwise direction. P2 is locked to shaft B for CCW rotation by unidirectional clutch UC 2) Unidirectional clutch UC 4 allows shaft B to turn freely in the CCW direction. The diameters of the drive pulley, the capstan, and P2 are chosen so that the half of magnetic clutch MC 2 attached to B will rotate faster than the half attached to shaft D. This means that master reel MR 2 has a tendency to be driven faster than the supply of master drive tape over the capstan will allow. Tape tension is thus produced in the master tape and in the oxide coated cassette tape as well, since clutch FC 2 is engaged for CCW rotation to cause shafts D and F to rotate in unison. If the direction of travel is from left to right, clutch FC 1 is disengaged so that shafts C and E rotate independently. Drag can be placed on shaft E to maintain tension in the cassette tape, wit...