Browse Prior Art Database

Reel Drive Transport

IP.com Disclosure Number: IPCOM000074709D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Tagawa, JM: AUTHOR

Abstract

A single reversible motor drive has a direct connection to a first reel and a one-way clutch-hysteresis clutch connection to a second reel. For transducing operations between tape 10 and head 11, reel 12 is rotated by motor 13 to move tape in the direction of arrow 14. One-way clutch 27 decouples drive belt 15 from driving system 16. To provide constant torque drag on reel 17, a second one-way clutch 18 couples reel 17 and shaft 19 to the frame. Hysteresis clutch 20 couples the stationary shaft 19 to reel 17 to supply a constant torque drag to provide a uniform tension on tape 10 for good transducing operations. A pressure pad may force tape 10 against head 11. Motor control 21 is responsive to tachometer signals derived from the spool shafts 22 and 23 to control motor 13.

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Reel Drive Transport

A single reversible motor drive has a direct connection to a first reel and a one-way clutch-hysteresis clutch connection to a second reel. For transducing operations between tape 10 and head 11, reel 12 is rotated by motor 13 to move tape in the direction of arrow
14. One-way clutch 27 decouples drive belt 15 from driving system 16. To provide constant torque drag on reel 17, a second one-way clutch 18 couples reel 17 and shaft 19 to the frame. Hysteresis clutch 20 couples the stationary shaft 19 to reel 17 to supply a constant torque drag to provide a uniform tension on tape 10 for good transducing operations. A pressure pad may force tape 10 against head 11. Motor control 21 is responsive to tachometer signals derived from the spool shafts 22 and 23 to control motor 13.

For rewinding tape 10 from spool 12 to reel 17, the direction of motor 13 is reversed. Belt 15 couples motor 13 to driving system 16 for rotating reel 17. The torque is transmitted through one-way clutch 27 (one-way clutch 18 is freed for rotation) via constant-torque hysteresis clutch 20 to reel 17. The diameters of pulleys 24 and 25 are such that reel 17 rotates at a slightly higher velocity than motor 13 drives spool 12. In this manner, the constant torque transmitted through clutch 20 is sufficient to wind tape 10 on reel 17 using constant torque characteristics. Since spool 12 is driven at a slower rotational velocity than reel 17, motor 13 directly determines reel 17...