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Vacuum Column Reel For Magnetic Tape Loop

IP.com Disclosure Number: IPCOM000098462D
Original Publication Date: 1960-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Brandenberg, W: AUTHOR

Abstract

The vacuum column reel enables substantial space saving in the use of short loops of magnetic tape. The reel is assembled from two imperforated side flanges 10 and a center section 12 having a number of long radial projections to form tape receiving columns. The reel is mounted for rotation on a spindle 13. Each column has a bottom opening 14 communicating through the spindle 13 with a vacuum supply which pulls tape into the column. A pair of tape guides 16 directs the tape 17 as it is pulled from and fed into the reel columns. The guides provide a vacuum seal against projections of the columns supplying and receiving tape. The vacuum supply openings 14 to the empty columns between guides 16 are closed by a valve face 18 on the spindle 13.

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Vacuum Column Reel For Magnetic Tape Loop

The vacuum column reel enables substantial space saving in the use of short loops of magnetic tape. The reel is assembled from two imperforated side flanges 10 and a center section 12 having a number of long radial projections to form tape receiving columns. The reel is mounted for rotation on a spindle 13. Each column has a bottom opening 14 communicating through the spindle 13 with a vacuum supply which pulls tape into the column. A pair of tape guides 16 directs the tape 17 as it is pulled from and fed into the reel columns. The guides provide a vacuum seal against projections of the columns supplying and receiving tape. The vacuum supply openings 14 to the empty columns between guides 16 are closed by a valve face 18 on the spindle 13.

The tape 17 from a lower column on the reel passes over the lower tape guide 16, around an idler roller 20 and over the transducer 21 to a drive capstan 22 and pressure roller 24. From the capstan 22 the tape is fed over the upper guide 16 into the receiving column of the reel. Preferably, the reel is impositively driven in synchronism with the drive capstan 22 but such drive may be dispensed with when there is no objection to the use of sufficient tension in tape 17 to turn the reel as tape is withdrawn.

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