Browse Prior Art Database

Media Loading

IP.com Disclosure Number: IPCOM000075412D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 3 page(s) / 35K

Publishing Venue

IBM

Related People

Allison, GL: AUTHOR [+5]

Abstract

It is desired to load flexible magnetic record media into a pair of vacuum columns or chambers such that a predetermined relationship exists between the initial position of the loaded tape and a reference point in the vacuum columns. The method is applicable to a reel-to-reel cartridge 10 loadable onto a pair of vacuum columns 11 and 12, or a single-spool cartridge 13 loadable onto a pair of vacuum columns 14 and 15. The vacuum columns may be all identical in construction.

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Media Loading

It is desired to load flexible magnetic record media into a pair of vacuum columns or chambers such that a predetermined relationship exists between the initial position of the loaded tape and a reference point in the vacuum columns. The method is applicable to a reel-to-reel cartridge 10 loadable onto a pair of vacuum columns 11 and 12, or a single-spool cartridge 13 loadable onto a pair of vacuum columns 14 and 15. The vacuum columns may be all identical in construction.

During loading, it is desired to keep a reference point on the media, such as at 16 and 17, relatively fixed with respect to the vacuum-column arrangement. This enables LOAD POINT to be positioned in close proximity to a transducer, not shown.

In two-spool cassette 10, rotating reel 20 clockwise a preset rotational distance unspools a metered length of tape past tape-driving capstan 21 into vacuum chamber 12. Upon reaching the preset rotations, capstan 21 is rotated counterclockwise a second preset rotational distance while spool 20 continues rotation for moving media from spool 20 into chamber 12, thence over capstan 21 into vacuum chamber 11. Upon completion of the rotation of both reel 20 and capstan 21, the magnetic media is distributed between columns 11 and 12 in a predetermined manner with reference point 16 being immediately adjacent reel
22. Then, the media is positioned for transducing operations by being selectively transported between the two reels and the vacuum chambers under joint control of capstan 21 and reels 20 and 22. For more precise control, when reel 20 has rotated a major portion of the preset distance, its velocity is reduced. This latter action prevents snapping the media.

The loading technique for single-spool cartridge 13 includes rotating single spool 25 clockwise for moving media to the right into vacuum columns 14 and 15. Because of the geometry and vacuum in columns 14 and 15, the media loads into column 15. After a preset rotation of spool 25, a metered length of media is in chamber 15. At this time, capstan 26 rotates counterclockwise a preset distance...