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Browse Prior Art Database

Tape Synchronizing Method

IP.com Disclosure Number: IPCOM000092422D
Original Publication Date: 1966-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Johnson, RB: AUTHOR

Abstract

The tape synchronizing method supplements a tape speed control. In connection with drawing 1, the system synchronizes the position of The tape synchronizing method supplements a tape speed control. In connection with drawing 1, the system synchronizes the position of tape 10, as designated by synch mark 11, with the position of rotating head 12, as designated by synch position 13. Assuming that the tape speed control, such as variable speed capstan 14, cannot sufficiently maintain synchronism, tape 10 and head 12 gradually drift out of synchronism until a limit is reached. At this point the synchronizing system is activated. In drawing 2, upon mark 11 being detected by synch head 15, brake 16 is operated to stop tape 10 and to hold portion 17 of tape 10 at the synchronized position.

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Tape Synchronizing Method

The tape synchronizing method supplements a tape speed control. In connection with drawing 1, the system synchronizes the position of The tape synchronizing method supplements a tape speed control. In connection with drawing 1, the system synchronizes the position of tape 10, as designated by synch mark 11, with the position of rotating head 12, as designated by synch position 13. Assuming that the tape speed control, such as variable speed capstan 14, cannot sufficiently maintain synchronism, tape 10 and head 12 gradually drift out of synchronism until a limit is reached. At this point the synchronizing system is activated. In drawing 2, upon mark 11 being detected by synch head 15, brake 16 is operated to stop tape 10 and to hold portion 17 of tape 10 at the synchronized position. Meanwhile, in drawing 3 capstan 14 continues to rotate, driving tape 10 into storage area 18. In drawing 3, head 12 reaches position 13, causing brake 16 to be released. The tape is now in synchronism and can be driven by head 12 by separate advancing devices not shown, establishing normal operation of variable speed capstan 14 as shown in drawing 4.

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