Tape threading mechanism

Details Tape threading mechanism Tape threading mechanism

1992-02-20

1993-06-15

Cuchlinski, Jr., William A.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

360 95, 226 92, G03B 104, G11B 1567

Patent

active

052191290

ABSTRACT:
The tape threading mechanism threads a magnetic tape from a magnetic tape cartridge along a tape transport path to a take-up reel by using a two-member, spring loaded tape threading arm which uses two cam surfaces to control the articulation of the spring-loaded tape threading arm. A cam follower formed on the upper end of a leader block locating pin of the tape threading arm engages a short cam surface at the beginning of the tape transport path to guide the leader block of the magnetic tape along a short distance at which time the tape threading arm is smoothly accelerating. Once the cam follower disengages from the cam surface, the spring-loaded tape threading arm is locked into a fixed radius which allows the magnetic tape to maintain a constant velocity through approximately three hundred degrees of rotation, at which time the cam follower engages a second cam surface. The second cam surface guides the cam follower and leader block into position to engage the take-up reel. This cam engagement allows the magnetic tape to smoothly decelerate. The smooth acceleration and deceleration and constant velocity in between reduces the changes in tension of the magnetic tape as well as allows the magnetic tape to move at a much higher velocity.

REFERENCES:
patent: 3764088 (1973-10-01), Yamada et al.
patent: 4243186 (1981-01-01), Peter et al.
patent: 4399936 (1983-08-01), Rueger
patent: 4608614 (1986-08-01), Rinkleib et al.
patent: 4704645 (1987-11-01), Murphy et al.
patent: 4742407 (1988-05-01), Smith et al.
patent: 4949914 (1990-08-01), Barton, Jr.

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