Magnetic tape guide system - has cam disc driving pivoted lever to apply friction pad braking to tape

摘要

The magnetic tape guide system includes a controlled braking device to provide secure tape retention. The magnetic tape (4) is fed from the spools of a cassette around a sensing guide (3) that is supported in a bush on a base (6). A friction pad (24) is mounted on a disc (23) secured to a flexible arm (21). The arm is fixed to a rigid link (9) that is pivoted around a fixed pin (7) at one point and has a follower pin (11) at the other. The follower pin locates in a profiled cam track (17) in a disc that rotates. The track is shaped to ensure that the friction pad (24) presses against the tape for a specific period for each rotation.