Browse Prior Art Database

Compliant Take-up Reel Hub for Leader Block

IP.com Disclosure Number: IPCOM000060622D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Cranna, DKN: AUTHOR

Abstract

Creasing of the magnetic tape as a result of the non-coincidence of the hub radius and the leader block radius can be avoided by the use of a compliant material positioned at the end of the hub channel. The hub channel captures the leader block that carries the magnetic tape. The compliant material will compress as the tension of the layers of tape are wrapped around the hub such that the radius at the back section of the leader block becomes coincident with the hub radius.

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Compliant Take-up Reel Hub for Leader Block

Creasing of the magnetic tape as a result of the non-coincidence of the hub radius and the leader block radius can be avoided by the use of a compliant material positioned at the end of the hub channel. The hub channel captures the leader block that carries the magnetic tape. The compliant material will compress as the tension of the layers of tape are wrapped around the hub such that the radius at the back section of the leader block becomes coincident with the hub radius.

As shown in Fig. l, a threading pin l attached to an automatic threading device in a tape drive pulls a leader blo with the attached tape media 3 into a channel 4 formed in the hub 5 of the take-up reel (not shown) mounted in the tape drive. A piece of flexible material 6 is located in the hub 5 at the rear of the channel 4. When the leader block 2 is seated within the channel 4, the threading pin l is at the center of rotation of the hub 5. The hub then starts to rotate in the direction of the arrow 9, as shown in Fig. 2.

Rotation of the hub 5 causes the tape 3 to wrap around the circumference of the hub 5. The tension of the tape 3 moves a boss 7, located at the front tip of the leader block 2, into the flexible material 6 and compresses the flexible material. The radius 8 at the rear of the leader block 2 becomes coincident with the outer circumference of the hub 5, thereby providing a smooth continuous surface for subsequent layers of the tape 3....